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  • 1.
    Abbasi, Mazhar
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Dawit Ghebreigziabher, Kibret
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Objektklassificerad modellering och effektivisering avmängduttag2017Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The lack of fluent communication in the building industry has caught people’s attention because of

    time-based costs appearing in 2D and 3D modelling and takeoffs. These costs emerge in construction

    when miscommunication takes place between professionals in different projects.

    A research study of the subject has revealed the reason behind the current days’ miscommunication

    issues. The study shows that although the professionals tend to have an efficient way of working, the

    result isn’t very beneficial for the next man. Therefore a conclusion of the issue creates a demand for a

    mutual language in modelling and better softwares for takeoffs.

    This report’s results, with regards to optimization of modeling, has brought to light the use for the

    objectclassificationsystem BIP. These BIP-codes are used for branding objects in models of which the

    branding consists of unique codes. The code of every individual object has the purpose of being

    recognized by every project member and remain the same throughout the project.

    The proposal for the optimization of takeoffs is a software called VICO Office. The software contains

    well-advised methods for the import of models and close to automated takeoffs of these models.

    In conclusion, the study implies that there is sufficient motive to question the old ways of working and

    that light should be shed on new approaches. Technology and the industry face a constant change and

    the efficiency of current methods are never far away.

  • 2.
    Abbasi, Mozaffer
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Analys och implementering av VSL-System i FEM-Design för kontroll av stabiliserande effekt: En undersökning i syfte att fastlägga effekten av VSL-kablar i FEM-Design för att utvärdera dess stabiliserande påverkan.2014Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
  • 3.
    Abdali, Yasser
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Holm, Lovisa
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    En jämförelse mellan Tekla Structures och Civil 3D i krökta betongkonstruktioner2017Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Within the construction industry, there is a lot of discussion around BIM (Building InformationModelling). There is a need to move away from customized 2D-drawings and instead focus oninformative models which can be used throughout the whole cycle of construction. This developmenthas been ongoing within house construction, but this approach is harder to implement within thefacility sector.The difficulty in implementing a more BIM-oriented approach within construction is partly due tosoftware currently not being fully developed to create informative and reliable models of constructionswith complex geometries, such as bridges.Since Trafikverket, the largest construction developer within Sweden, has started to place a largerdemand on 3D there is a need for both technology and human resource to develop.The aim of this dissertation is to present a case study investigating the suitability of the software TeklaStructure and AutoCAD Civil 3D to perform a 3D-model of a double-curved bridge. The two pieces ofsoftware will be contrasted in a final comparison whereby both pros and cons will be presented.The study has made it clear that BIM is not just about creating an informative model, but it is alsoabout an approach which has the ability to completely change the construction sector to work morecollaboratively and effectively.The comparison between the two relevant software in this study shows that they both have strengthsand weaknesses and are suitable for our purpose. However, they differ in how detailed models theycan create and how well they have the ability to work with BIM to a greater extent.

  • 4.
    Abdinasser, Ahmed
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Tabatabaei, Sara
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Samverkan av jord och ovanliggande struktur i FEM-program: En studie av nya jordmodeller I FE-programmet 3D- Structure2017Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    De senaste åren har det funnits olika företag som har tillverkat avancerade mjukvaror inom byggbranschen. En del av mjukvaror är avsedd att skapa 2D ritningar och 3D modeller. Med hjälp av dessa verktyg har ingenjörer och arkitekter snabbt och enkelt skapat ritningar och modeller för projektering av konstruktioner. Utvecklingen inom detta område kallas BIM. Byggnadsinformationsmodellering, BIM, stödjer design av en byggnad genom alla faser och möjliggör bättre konstruktions-, tillverknings- och inköpsaktiviteter.

    Andra mjukvaror är tilltänkt att förutse hur en struktur reagerar på verkliga laster, vibrationer, värme och andra fysiska effekter. För detta används finita elementmetod, där kommer strukturen analyseras i element för ett noggrannare resultat. En utveckling inom detta område har också skett. Företaget Strusoft AB utvecklar FE-verktyg för analys av struktur. Den senaste nyheten är modul för beräkning av samverkan mellan struktur, grundläggning och undergrunden i form av jord. Modulen kallas 3D-Soil och används enligt Strusoft för modellering och analys av geokonstruktioner.

    I denna rapport redovisas modellering av en struktur och underliggande jord med finit elementanalysprogrammet, FEM-Design som är försett med den nya modulen 3D-Soil för geotekniska beräkningar.

    Målet är att jämföra resultat för moment utifrån samverkanskrafter mellan jord och struktur i FEM-Design med ett annat FEM-program, Lusas. Till skillnad från FEM-Design appliceras jord- och vattentryck som utbredd last i Lusas.

    Resultaten visar att det finns signifikanta skillnader mellan resultaten från analysprogrammen och det finns begränsningar i modelleringsverktyget som behöver utvecklas vidare.

  • 5.
    Abed, Mohamad Samir
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Hosseinzade, Azita
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Parameterstyrd projektering av broar: Koppling mellan Rhinoceros-Grasshopper och Tekla Structures2017Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    New methods for project designing in the building construction industry have been developed by introducing modern and powerful BIM tools. Several of today’s constructions are designed according to three-dimensional principles.Tekla Structures is a powerful BIM tool that is capable of managing both house and infrastructure constructions. Despite this, the program cannot handle bridges with a horizontal and vertical curvature efficiently. The designers must instead rely on several other applications to manage complex bridge constructions.In order to use the advantages of Tekla Structures, the software needs to be evolved or complimented by other third party softwares. This project aims to integrate new working technics and introduce a method based on parametric design in Tekla Structures. Such form of modeling enables the modification of parameters to a desired model for the user.A script is created through a visual programming extension that generates a parametric based bridge models. The bridge type in this project was designed, is an integral bridge.The project has proved that parametric based design is more effectively and a solution to manage bridges with horizontal and vertical curvature.

  • 6.
    Abrigian, Mari
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Almqvist Gärtner, Daniel
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Möjligheter och utmaningar med internationella inköp: En studie av internationella inköp2017Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The construction industry in Sweden today are facing a major challenge in building society and following the pace of population growth. Rising material prices are today a fact, and at the same time there is a lack of capacity at the Swedish suppliers as they are bound up in supplier agreements for the coming years. The largest construction companies in Sweden have been working strategically with international suppliers for a long time to increase their margins and to secure their material needs.

    BTH Bygg AB is today a company that builds, renovates and maintains real estate in Stockholm. The company has expanded in recent years and is committed to strong growth by 2020. Work on international purchasing has previously been limited to BTH Bygg, but this type of purchase is today seen as a necessity to continued growth and to be competitive in that part of Sweden where most is built.

    The purpose of this study is to analyze BTH Bygg's existing purchasing process to further develop and propose improvements with international procurement as a starting point.

    The study has been conducted with the help of interviews to get a complete picture of the issues of international purchasing. BTH Bygg AB has a strong organization with a lot of experience related to the subject area, and focus has been on compiling these in order to come up with suggestions and ideas on how to handle international purchases. Recommendations are focused on areas related to supplier assessment, communication, logistics and product selection.

  • 7.
    Acuña, José
    KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
    Distributed thermal response tests: New insights on U-pipe and Coaxial heat exchangers in groundwater-filled boreholes2013Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    U-pipe Borehole Heat Exchangers (BHE) are widely used today in ground source heating and cooling systems in spite of their less than optimal performance. This thesis provides a better understanding on the function of U-pipe BHEs and Investigates alternative methods to reduce the temperature difference between the circulating fluid and the borehole wall, including one thermosyphon and three different types of coaxial BHEs.

    Field tests are performed using distributed temperature measurements along U-pipe and coaxial heat exchangers installed in groundwater filled boreholes. The measurements are carried out during heat injection thermal response tests and during short heat extraction periods using heat pumps. Temperatures are measured inside the secondary fluid path, in the groundwater, and at the borehole wall. These type of temperature measurements were until now missing.

    A new method for testing borehole heat exchangers, Distributed Thermal Response Test (DTRT), has been proposed and demonstrated in U-pipe, pipe-in-pipe, and multi-pipe BHE designs. The method allows the quantification of the BHE performance at a local level.

    The operation of a U-pipe thermosyphon BHE consisting of an insulated down-comer and a larger riser pipe using CO2 as a secondary fluid has been demonstrated in a groundwater filled borehole, 70 m deep. It was found that the CO2 may be sub-cooled at the bottom and that it flows upwards through the riser in liquid state until about 30 m depth, where it starts to evaporate.

    Various power levels and different volumetric flow rates have been imposed to the tested BHEs and used to calculate local ground thermal conductivities and thermal resistances. The local ground thermal conductivities, preferably evaluated at thermal recovery conditions during DTRTs, were found to vary with depth. Local and effective borehole thermal resistances in most heat exchangers have been calculated, and their differences have been discussed in an effort to suggest better methods for interpretation of data from field tests.

    Large thermal shunt flow between down- and up-going flow channels was identified in all heat exchanger types, particularly at low volumetric flow rates, except in a multi-pipe BHE having an insulated central pipe where the thermal contact between down- and up-coming fluid was almost eliminated.

    At relatively high volumetric flow rates, U-pipe BHEs show a nearly even distribution of the heat transfer between the ground and the secondary fluid along the depth. The same applies to all coaxial BHEs as long as the flow travels downwards through the central pipe. In the opposite flow direction, an uneven power distribution was measured in multi-chamber and multi-pipe BHEs.

    Pipe-in-pipe and multi-pipe coaxial heat exchangers show significantly lower local borehole resistances than U-pipes, ranging in average between 0.015 and 0.040 Km/W. These heat exchangers can significantly decrease the temperature difference between the secondary fluid and the ground and may allow the use of plain water as secondary fluid, an alternative to typical antifreeze aqueous solutions. The latter was demonstrated in a pipe-in-pipe BHE having an effective resistance of about 0.030 Km/W.

    Forced convection in the groundwater achieved by injecting nitrogen bubbles was found to reduce the local thermal resistance in U-pipe BHEs by about 30% during heat injection conditions. The temperatures inside the groundwater are homogenized while injecting the N2, and no radial temperature gradients are then identified. The fluid to groundwater thermal resistance during forced convection was measured to be 0.036 Km/W. This resistance varied between this value and 0.072 Km/W during natural convection conditions in the groundwater, being highest during heat pump operation at temperatures close to the water density maximum.

  • 8.
    Adnan Alromi, Sandra
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Singh Sidhu, Jivi
    Arbetsberedning som verktyg för att förbättra arbetsmiljön2017Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    To safely and effectively carry through within the construction industry, planning plays an important part. Work preparation is one form of planning. When using the model of work preparations, one analyzes the specific work preparation with the intent and goal to carry through the labor within the beforehand estimated time, budget and quality, while still maintaining satisfying work environment.The aim of this paper is to, from a perspective of work environment, map out how NCC: s work preparations function today. The goal is to provide suggestions for improvement. This can be done by performing interviews and surveys on the NCC employees.The results indicate that the staff of NCC see work preparation as a helping aid in improving work environment. However, there are also shortcomings in the way work preparations are done at NCC, and these could be improved. We therefore recommend NCC to make improvements in the planning, realization and the follow-up phase when setting up a work preparation. Our suggestions for improvement can be found under “recommendations”.

  • 9.
    Af Klintberg, Albin
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Åkehag, Jonny
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Träbjälklag med tung fyllning: Bjälklag framtaget med inspiration av byggteknik från sekelskiftet 1800–19002017Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This report investigates the possibilities of using residual products as sound insulation in apartment

    separating timber floors with a span of 6 m. One step towards meeting the Swedish construction

    industry's zero vision for carbon dioxide emissions is to build more using timber and to reuse/recycle

    residual products. The Swedish building contractor Skanska has at its quarries a surplus of material in

    the form of crushed rock of the 0 - 0.2 mm fraction and crushed residual concrete. In this report, a

    prototype of a timber floor has been produced with influences of construction technology from the

    turn of the 19

    th century regarding the use of heavy filling as sound insulation in timber floors.

    The developed floor prototype complies with the requirements set in BBR after dimensioning

    according the Eurocodes regarding fire safety, strength, sagging and deflection. According to a

    simulation in SEAWood, a tool for acoustic simulation which is under development at RISE Research

    Institutes of Sweden the requirements for sound insulation are also met, which is supported by

    analyzes made by comparing with data on similar timber floors. The high mass of the filling material

    implies that the prototype is a low frequency floor, this in conjunction with the simulation only being

    an indication of sound insulation properties, it will require practical tests to determine the prototypes

    sound insulating and dynamic properties.

    The developed floor prototype is suitable for prefabrication thanks to a design with few components.

    Prefabrication of the floor has in addition to the economic benefits it brings great benefits from a

    working environment perspective and is also beneficial from a moisture point of view.

    To estimate the environmental impact of the timber flooring, a simple comparison was made with a

    prefabricated concrete floor which showed that carbon dioxide emissions up to the using phase were

    more than twice that of the concrete floor than for the prototype floor.

  • 10.
    Afshar, Samim
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Alaoui, Youssef
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Jämförelser mellan massivträ- och betongstommar i flerbostadshus: Bedömning av byggtid, väderkänslighet, arbetsmiljö, bekant byggteknik, installation, projektering, spännvidder, flexibilitet, brandsäkerhet, ljudisolering och fuktsäkerhet.2016Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
  • 11.
    Ahlfors, JOhanna
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Häggdahl, Josefin
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Framtidens modulskola: En jämförande studie av arbetsmiljön i en tillfällig och en befintlig skolbyggnad2016Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
  • 12.
    Ahmad, Roman
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Chammoun, Johan
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Optimering av den svenska metoden fördimensionering av betongbeläggningar på flygfält2017Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Sverige har länge använt beläggningsytor av asfalt på grund av dess flexibla

    egenskaper som är lämpliga för det svenska klimatet. Historiskt sett har Sverige

    haft låg trafikmängd vilket inte gett utrymme för utvecklingen av betong som

    beläggning i vägar.

    Trafikmängden har sedan ett par år tillbaka ökat markant och det kan därför hända

    att det kommer att byggas betongvägar i huvudleder. Emellertid är erfarenheten i

    Sverige så pass låg att utveckling av nuvarande metoder fordras. USA har länge

    brukat betongvägar i stor skala och har betydligt större mängd betongvägar i

    motsats till Sverige, som har mindre än 1 %. Den ökade trafikmängden speglas

    även på flygplatser.

    I den här studien jämförs den svenska dimensioneringsmetoden för

    betongbeläggning på flygfält (Strand, 2016) med den amerikanska

    dimensioneringsmetoden i syfte att optimera den svenska metoden.

    Den svenska dimensioneringsmetoden (Strand, 2016) som denna studie behandlar

    är förenklad och baserad på gamla teorier. Metoden framställs genom äldre

    litteraturstudier men kombineras även med aktuell litteratur. Den amerikanska

    metoden används genom dess egna datorprogram kallad FAARFIELD där alla

    beräkningar görs med hänsyn till dess normer och krav.

    Dimensioneringen sker för lasten från Airbus A380 med 365 avgångar per år

    enligt Swedavias förväntningar. Oarmerade betongplattor med 350 till 450 mm

    tjocklek med betongkvaliteten C35/45 klarar inte av utmattningskriteriet. Däremot

    klarar likadana plattor med betongkvalitén C60/75 utmattningskraven och

    fungerar utmärkt som beläggning på uppställningsplatser och rullbana. Vid

    dimensionering enligt den amerikanska metoden visar resultaten att plattorna blir

    både tjockare och tunnare än den svenska metoden beroende på vilken

    betongkvalite som används.

    Den svenska metoden förutsätter en del förenklingar vid dimensionering av

    betongbeläggningar och därför blir inte beräkningen helt korrekt. Resultaten som

    denna studie visar är därför preliminära. Optimering av den svenska

    beräkningsgången är ett steg i rätt riktning men det praktiska utförandet av arbetet

    och erfarenheten av detta är något som måste byggas ut för en fulländad och

    fungerande metod i praktiken.

  • 13.
    Aid, Graham
    KTH, School of Industrial Engineering and Management (ITM), Industrial Ecology.
    Industrial Ecology Methods within Engagement Processes for Industrial Resource Management2013Licentiate thesis, comprehensive summary (Other academic)
    Abstract [en]

    The global use of resources such as materials, energy, and water has surpassed sustainable levels by many accounts.  The research presented here was explicitly normative in its aim to improve the understanding of, and make sustainable change toward highly systemic issues of resource management.  The core methods chosen to work toward this aim were bottom up action research procedures (including stakeholder engagement processes) and industrial ecology analysis tools.  These methods were employed and tested in pragmatic combination through two of the author’s case study projects. The first case study, performed between 2009 and 2012, employed a multi-stakeholder process aimed at improving the cycling of construction and demolition waste in the Stockholm region.  The second case study produced a strategic tool (Looplocal) built for facilitating more efficient regional industrial resource networks. While the highly participative aim of the cases required a larger contribution of resources than that of more closed studies, it is arguable that the efficacy of approaching the project aims is improved through their employment. 

  • 14.
    Aid, Graham
    et al.
    KTH, School of Industrial Engineering and Management (ITM), Industrial Ecology (moved 20130630).
    Brandt, Nils
    KTH, School of Industrial Engineering and Management (ITM), Industrial Ecology (moved 20130630).
    Improvement of aggregate cycles in Stockholm and the Baltic Region: Activities and results of the BRA initiative2012In: WASCON 2012 Conference proceedings / [ed] M. Arm, C. Vandecasteele, J. Heynen, P. Suer and B. Lind, 2012, p. 1-9Conference paper (Refereed)
    Abstract [en]

    From 2009 until 2011 project BRA (Bygg-och Rivningsavfall i Stockholms Län) “Construction and Demolition (C&D) waste in Stockholm County” was coordinated from the division of Industrial Ecology, KTH. This project was focused on actively improving (from plural perspectives) the cycles of C&D (specifically non-metallic inert) materials in the region. In response to the normative aim and inter-systems complexity, a highly participative action research procedure was adopted. Through processes of network communication, workshops, a course, and an international symposium - a number of issues (such as market development, recycled product quality, greenhouse gas impacts, collaborative planning, and statistics) were prioritized, researched, and acted upon. Indicators for measuring progress in selected areas were developed and preliminary action plans created. At a final co-organized symposium Swedish delegates laid the groundwork for the establishment of a Swedish C&D recycling b ranch organization. This initiative of continued collaboration between and within sectors is seen as a vehicle for the priorities and action requirements identified in BRA to be further enabled and held in focus. Furthermore, these actors taking ownership of the process is seen as a success in accordance to the original aims and the need for further cycles of evaluation, planning, and action.

  • 15.
    Akrawi, Kahi
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Sharif, Vina
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Tätningsmetoder av tunnlar för skydd av installationer: En studie baserad på litteratur, intervjuer och tidigare arbeten.2016Independent thesis Basic level (university diploma), 5 credits / 7,5 HE creditsStudent thesis
  • 16.
    Albihn, Sara
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Ivarsson, Erica
    ÄNDRAD ANVÄNDNING AV BEFINTLIG BYGGNAD: från kontor till studentbostäder2017Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    There is a housing shortage in Stockholm and the most vulnerable group are young people who are tryingto establish themselves on the housing market. The lack of housing opportunities is forcing students towait for many years before they get a chance to rent a home and thus contributes to withdrawal fromstudies. The establishment of new student-housing is growing but there is still much progress to bemade until the needs are fully satisfied. At the same time office spaces are left vacant with no tenantswaiting to move in. Stockholm is growing at an increasingly high pace and establishing new housing is aninescapable truth. Furthermore, tearing down existing buildings can cause a strain on the environmentwhereas preserving existing buildings can contribute with cultural value and befriend sustainability.Although the intended use of a building isn’t always suitable for its layout. In this instance, changing thepurpose can contribute to the preservation of a building and at the same time fulfil the needs originatingfrom the shortage of housing.This degree project within the Bachelor programme in Construction Engineering at the Royal Institute ofTechnology in Stockholm, has been performed at Ahlsénarkitekterna during 10 weeks. This thesis treatsthe subject of the adaptive reuse of existing office buildings into student housing.

  • 17.
    Allawirdi, Teresa
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Gunduz, Helen Rebecka
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Tidsplanering och visualisering inom anläggningsprojekt2016Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
  • 18.
    Andersson, Emil
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Dag, Maria
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Kvalitetssäkring av 3D-modeller i Revit2017Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    At present, BIM (Building Information Model) is used in a vast majority of large scale building projects. A 3D model is created with a compatible BIM program. By working on a 3D model, the work process simplifies due to the fact that all users can simultaneously work on the same model, thus providing better coordination capabilities and delivering an overview of the final product.

    As a structural engineer, it is important to have an accurate and reliable basis for working with precision data. Currently, Sweco has no documentation which offers clarification or quality assurance to the content of 3D models. With this in mind, there is a considerable opportunity for improvement by using a checklist to advance the quality assurance of modeling to a new level.

    The task involved the creation of a checklist that could enhance the working process and improve quality assurance regarding the creation of a 3D model. Through interviews with constructors at Sweco, a checklist was created that will be effective in use by constructors working with Revit, as there are currently no comparable documents available. The conclusion that can be drawn from this work is that the drafted checklist is a positive step towards a better controlled modeling process of 3D models.

  • 19.
    Andersson, Lina
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Trochez, Michelle
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Accelererande tillsatsmedlens påverkan på betongens egenskaper: Med fördjupning på betongens uttorkning2015Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
  • 20.
    Andersson-Vass, Vilmer
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering.
    Temperatursprickor i betong: Metodutveckling för sprickbegränsning och uppföljning av uppsprickning i en tunnelkonstruktion2015Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    In order to reduce the risk of thermal cracks in a concrete structure it is recommended to reduce the temperature differences between already existing concrete parts and the newly cast parts. Therefore, adjacent and already cast parts of the structure are sometimes heated up prior to casting of a new concrete part. This reduces the temperature differences within the structure and thus the risk of thermal cracks. This heating is generally done via heating cables placed in the concrete. This method has two drawbacks: firstly, one has to plan for the heating cables in an early stage and secondly, the cables sometimes break when cast in. As an alternative and compliment to the heating cables, a new type of heating mat for heating of concrete structures was designed and produced during 2014. It is built the same way as frost thawing mats but has a lower electrical effect to avoid overheating when heating the concrete.

    The main subject that is investigated in this thesis is the effect the heating mat has on the underlying concrete. This was investigated in four field trials by measuring the temperature in concrete members while heating them up with the heating mats. The field trials were effected on concrete slabs and vaults and the heating mats were covered with a concrete curing mat made of 10 mm cellular plastic. The field trials were conducted in sunny and dry conditions as well as in cloudy and rainy conditions. Data from the field trials were used to produce a proposal on how to model the heating mat’s warming effect in Contest. This proposal is presented in Section 5.1.2and is the main result of this thesis. It can be used to include the heating mat’s effect in simulations to estimate thermal crack risks in Contest.

    In addition, two real castings of a tunnel structure are described in which heating mats were used to reduce the risk for thermal cracks. These two castings are studied regarding the risk for thermal cracking. Finally, an economical comparison is made where using heating mats is compared to using heating cables.

    The conclusion of this thesis is that the warming effect of the heating mat can be modeled in Contest in a simple and appropriate manner according to the proposed method. The proposed method considers that precipitation and sunshine influence the heating of the concrete. The actual temperature rise in the heated concrete might therefore be greater than what is obtained using the method in Contest, which gives a rise in temperature on the safe side. This conservative, slightly low estimation of the rise in temperature corresponds to using heating cables mounted on the upper reinforcement with a c / c distance of 40 cm. From an economic point of view, the purchase of heating mats means a relatively important initial investment cost compared to heating cables. Using heating mats instead of heating cables is therefore initially more expensive, but will eventually be profitable since the heating mats are not consumed. Based on the economic assumptions made in this thesis the heating mat was less expensive than heating cables if used more than about 30 times.

  • 21.
    Antoan, Shahad
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Naeem, Lina
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Solceller - för lönsam elproduktion: En undersökning om hur lönsam en solcellsanläggning på en byggnad är med hänsyn till teknisk samt ekonomisk perspektiv.2016Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
  • 22.
    Ardalani, Alan
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Holm, Eddie
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Energianalys mellan programmen IES (Integrated Environmental Solutions) och Enorm2010Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    An increase interest of new methods and tools has begun to grow in the real estate business, this new trend causes an increase in new programs that aim to simplify processes of energy-efficiency and environmental issues.

    After consulting with Björn Alsmark from Bjerking AB, an architect and engineering company, we made a decision that the Degree Project is going to examine the program IES (Integrated Environmental Solutions) with some integrations from Revit Architecture application.

    To be able to examine IES, we got access to a completed project from Bjerking. The project is a nursery school in Uppsala. An application has been handed in from Bjerking to make this project to a Green Building-certificated project. According to Bjerking own calculations (with the energy-calculation program Enorm), the consumption of energy of the nursery school is 48 percent lesser than required by BBR.

    An evaluation of IES and Enorm has been made with an aim to compare these two programs and find out if IES is an appropriate program to replace Enorm. Does Enorm or IES come up to BBR´s recommendations?

    The Degree Project cover 15 ECT, that required several adjusting and delimitations, and the study sketch ended with a literature study.

    After finishing the study sketch the modeling of the nursery school began. The model was adjusted in Revit Architecture so that it would suit IES. But complications appeared when the Revit model was about to be transferred into IES. Instead of using Revit, we simplified the model by using IES own modeling application, ModelIT.

    A study of the sun was made in SunCast to be able to get a study of the suns solar shading on the building, also the sun effect. The result from SunCast was later used in the energy-calculation in ApacheSim. A ventilation scheme was also designed in ApHVAC.

    The result showed that the IES VE is suitable for energy modeling and that there is space for improvement over the integration between the IES VE and Revit.

  • 23.
    Aripov, Alim
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Shirvanpour, Shaian
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Bygglogistik metoder: En granskning av norra Djurgårdsstaden och Barkarbystaden2016Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
  • 24.
    Aronsson, Andreas
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering.
    Hinders, Niclas
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering.
    Analys av SWMM-CAT och möjligheten att tillämpa SWMM-CAT i Sverige2015Independent thesis Basic level (university diploma), 5 credits / 7,5 HE creditsStudent thesis
    Abstract [en]

    Sweden will during this century experience an increased amount of precipitation, up to 40 % in some parts of the country.  Flooding will be more common and heavy rain during short periods of time is the greatest threat of having a functioning drainage system. The amount of storm water that urban areas will have to handle can be massive due to the lack of infiltration areas.

     

    SWMM-CAT (Storm Water Management Model – Climate Adjustment Tool) is software that can create future climate change projections. By searching for coordinates or zip-codes in the US the user can receive data for changes in precipitation, evaporation, temperature and 24-hour design storm at a specific location. The information can be used to get more knowledge of how these parameters will change in the future, but also to import as adjustment factors to SWMM (Storm Water Management Model). SWMM is a simulation software for planning and analysis of storm water runoff. The adjustment factors allow planning of sewer systems with consideration of future climate change.

     

    To compare the results of a simulation with SWMM-CAT and without SWMM-CAT we constructed a SWMM-model. The result showed an increased water flow from the sub catchment area from 43 l/s to 66 l/s. This result displays that it is important to consider how the climate change can affect the sizing of sewer systems.

     

    SWMM-CAT is a user friendly software and can easily be used to predict future climate change outcomes related to precipitation and temperature, but it demands experience from SWMM to make correct simulations with adjustments from SWMM-CAT. Since climate changes varies geographically, SWMM-CAT cannot be used in Sweden because the projections is based on a grid system over the US. The research of Rossby Centre provides future climate change projections in precipitation, evaporation and temperature for Sweden. We believe that it is sufficient data to create a software similar to SWMM-CAT in Sweden.

     

    We believe that the best way to cope with the climate changes in urban areas is to combine future climate projections with low-impact development.

  • 25.
    Atabas, Burak
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Unlu, Busra
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Verktygslådan : Effektivisering av projekteringsskedet med hjälp av en tilläggsfunktion i Revit2017Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    For more time and cost efficient projects, the construction industry needs to develop modern and integrated working methods. The preparation of construction documents is now in transition from 2D (AutoCAD) to 3D (Revit) modelling with an aim to streamline the workflow.

    This study aims to streamline the construction designing and planning stages by implementing specific commands that are adapted for Revit. The function of these commands is to provide complete structural components. These components will reduce the time to complete a construction drawing set compared to a traditional 2D method.

    Qualitative studies were conducted in the form of interviews with construction engineers. The interviews were based on different sub-areas that affect different parts of the planning stages. Based on these interviews, the toolbox was designed, containing the previously mentioned commands.

    Some conclusions that have been drawn after the study completion are that the construction industry is in need for a change, and that the building sector requires a systematic and united working method to streamline work methodology. In addition to the reduction of time and additional costs, this tool will reduce the frustration that may arise in the search of building components using traditional methods.

  • 26.
    Ausekle, Maija
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Beräkning av snittstorheter för betongspiral i ett vattenkraftverk: Jämförelse mellan handberäkningar och FEM-modellering2016Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
  • 27.
    Backlund, Oskar
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Gustafsson, Agnes
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Kvartsdamm - ett arbetsmiljöproblem i anläggningsprojekt.: En undersökning om medvetenhet, rutiner och krav gällande kvartsdamm.2016Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
  • 28.
    Baithoon, Firas
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Wahlgren, Ludwig
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Arbetsmiljölagen för projektören i praktiken: E4Förbifart Stockholm2016Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
  • 29.
    Baltzer, Sigrid
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Bühlmann, Axel
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Så bygger vi bättre studentbostäder: Bostäder efter studenterns behov2016Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
  • 30.
    Barikan, Chirin
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Velu, Alexander
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Fukttillskott från mark i uteluftsventileradekrypgrunder: Moisture supply from ground in outdoor ventilated crawl spaces2017Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Uteluftsventilerade krypgrunder; fuktskador; mögelskador; fukttillskott;

    avdunstning från mark; relativ fuktighet

  • 31.
    Barikan, Maria
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Samir, Lina
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Kommunikation och samarbete mellanbeställare och entreprenör2017Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    With the shortage of vacant accommodation in the country, the need to develop new housing has increased significantly. To accomplish this in the most effective manner, the entire building process needs to be improved. The communication between the developer and the contractor is one such major aspect that may lead to furthering time and cost efficiency. During the construction process, several parties are involved from the early planning to the management of the development. All involved parties work towards a common goal where the cooperation between them could last several years. The key to a success is thorough and clear communication as well as good cooperation between the parties throughout the entire building process.This report is made in cooperation with Riksbyggen. The aim is to streamline future projects by examining the communication and cooperation methods used three previous construction projects. The purpose of this study is to examine the shortcomings in both the communication and cooperation between developer and contractor, and to identify good practices employed to achieve good communication and cooperation, as well as take constructive action to improve future projects.The study has a qualitative design; and empirical data collection consists mainly of semi-structured interviews. Through interviews with key figures from the three investigated construction projects, an overall idea of the cooperation and communication between developer and entrepreneur has been obtained. The results show that when the developer worked alongside the contractor during the early construction phases, it added value to the project. Time constraints and organizational changes in the projects had a negative impact on cooperation and communication between the parties. Every construction project is unique, it is therefore profitable for the overall value of the project to customise the communication and cooperation forms according to the projects nature. The thesis also highlights the value of experience feedback and improvement suggestions for Riksbyggen experience systems.

  • 32.
    Barzngy, Ahmad
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Zangana, Majid
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Beläggningsskadors typ, omfattning och orsaker på statliga vägnätet2017Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The transport administration currently performs a research project where they conduct investigations and analysis of road damage on state road. The purpose of the project is to in the long-term improve the possibilities to measure the road network, try to find the readings that connect the cause for the accidents and why the chosen maintenance is conducted. The aim of this study is to, with the help of an extensive collection phase in PMSv3, that stores data by road surface measurement, to be able to analyse different type of road damages and ther characteristics. Input has then been compared to the transport administrations requirement on maintenance standard. The results of the data collection has then been analysed and conection between visual damage and data from PMSv3 has been observed. The usefulness of the connections that have been observed lead to better understandnings on what main factors that affect the roads breaking down and where they frequently occur. There are indications of connections from the results that have been demostrated in the analysis and the conclusion. With consideration to the observations in PMSv3 lies this study for further depth and research.

  • 33.
    Bashay, Natnael
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Nawfal, Roubin
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Installationskrockar i ett ROT-Projekt2017Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Performing an installation process under a Renovation, Conversion and Extension (ROT) project is more

    complicated than in a new production. In a ROT projects, the installer meets old and hard-to- read

    documents that usually do not match the reality. The most common problem is that clashes may occur

    between the installations and building elements, which results in costs and time losses.

    In our report we have studied the opportunity to produce documents that correspond to reality at an early

    stage, which would facilitate planning and construction in a ROT project. The method is expected to

    solve the collision problem that may arise in the performance of the work, as well as being able to reach

    the installations in a smooth manner without any barriers to supervision and maintenance.

    The results of this report are based on the measurements we performed, in particular by using

    measurement methods using a handheld meter and a 3D-laser scanning technique that creates a 3Dmodeling

    .

    In order to be able to find a suitable space in the building and to ensure installations without

    any type of collision, careful design is required. To complete the study, several people were interviewed

    with experience in this area. Our conclusion is that through a combination of BIM, together with a wellfunctioning

    installation coordination and 3D-laser scanning, design accuracy can be increased, the risk of

    collisions reduced, leading to increased profitability in a ROT project.

  • 34.
    Battini, Jean-Marc
    et al.
    KTH, Superseded Departments, Structural Engineering.
    Pacoste, Costin
    KTH, Superseded Departments, Structural Engineering.
    Eriksson, Anders
    KTH, Superseded Departments, Structural Engineering.
    Improved minimal augmentation procedure for the direct computation of critical points2003In: Computer Methods in Applied Mechanics and Engineering, ISSN 0045-7825, E-ISSN 1879-2138, Vol. 192, no 16-18, p. 2169-2185Article in journal (Refereed)
    Abstract [en]

    This paper presents a new numerical procedure for the direct computation of critical points for elastic beam structures undergoing large displacements and rotations. Compared to the approach described by Wriggers et al. [Comput. Methods Appl. Mech. Engrg. 70 (1988) 329; Int. J. Numer. Methods Engrg. 30 (1990) 1551, two main modifications are introduced. First, following Eriksson [Comput. Methods Appl. Mech. Engrg. 114 (1994) 77; Comput. Methods Appl. Mech. Engrg. 156 (1998) 45; Comput. Methods Appl. Mech. Engrg. 179 (1999) 265; Int. J. Struct. Stability Dynam. l(l) (2001)], the condition of criticality is expressed by a scalar equation instead of a vectorial one. Next, the present procedure does not use exclusively the extended system obtained from the equilibrium equations and the criticality condition, but also introduces intermediate iterations based purely on equilibrium equations under load or displacement control, Eight numerical examples, presenting bifurcation and limit points, are used in order to compare the performances of this new method and the one presented in [Comput. Methods Appl. Mech. Engrg. 70 (1988) 329; Int. J. Numer. Methods Engrg. 30 (1990) 155].

  • 35.
    Behnam, Majd
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Karlsson, Axel
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Värmeförluster i fjärrvärmerör: En granskning av värmeförluster i fjärrvärmerör2017Independent thesis Basic level (university diploma), 5 credits / 7,5 HE creditsStudent thesis
    Abstract [en]

    This thesis is an evaluation of heat losses and economical savings for different types of district heating pipes. Calculations have been based on a fictional district heating system with the length 100m, for each district heating pipe dimension. The cause is to get a clear image of how profitable it is to use a higher series of insulation alternatively using twin pipes when it’s possible.The results show that twin pipes in lower dimensions has a lower investment cost, less heat losses and is more profitable than insulation series 2 and series 3. When it comes to twin pipes with a higher dimension the investment cost is slightly higher than single pipe insulation series 3, though the heat losses are much lower.The comparison between series 2 and series 3 show that series 3 is more profitable in both cases.These results show that it’s profitable for the network owners in the long-term to use either a higher insulation series or twin pipes.No evaluation of neither the impact on the environment or district heating pipes with diffusion barrier, has been done.

  • 36.
    Bellander, Rickard
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering.
    Hed, Göran
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering.
    Water-calorimetric measurement on large samples of PCM2005In: Energy and Buildings, ISSN 0378-7788, E-ISSN 1872-6178Article in journal (Other academic)
  • 37.
    Bergfeldt, Annie
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Sönnerlid, Malin
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Cut & Cover- betongtunnlar: Tids- och kostnadsanalys i Norsborgsdepån.2016Independent thesis Basic level (university diploma), 5 credits / 7,5 HE creditsStudent thesis
  • 38.
    Berggren, Niklas
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Gustafsson, Henke
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Dags att vända blad för monarkins fasad: Putsarbeten på Stockholms slott2011Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The restoration work of the Gotland sandstone at the Royal Palace in Stockholm began in spring 2011. In the first stage the sandstone of "norra Logårdsflygelns" facade will be restored. The restoration of the sandstone will cause damage to the plastered surfaces. Before work was started the plaster was in good condition considering its age, although some ballast were washed up on the surface.

    With the damage that will occur, it has since emerged to develop a plaster for patching. The patching plaster that we have developed through this thesis matches the existing plaster in color, texture, ageing and technical characteristics.

    For the production of patching plaster, we have studied the two original recipes used in the polishing of the facade. We have also conducted laboratory experiments with material replaced in the original recipe because they are not still available on the market.

    During the laboratory, we have determined by screening the existing plaster ballast fractions and its distribution. The replacement ballast that we have developed is following the existing ballasts term curves.

    The laboratory sessions resulted in a prescription for 25 kg plaster. This recipe contains precise amounts of binders, ballast and pigments. When the restorations are performed, the polished surface must be treated by brush and water to achieve the right structure. In this thesis we have developed methods for the treatment of the two extremes of the surface.

    We have also presented a plaster that can be used when the complete castle is plasterd. We have not done any lab work with this plaster but we have chosen an existing NHL-plaster. This plaster is working well with the palace’s façade and its construction. We suggest that the uncoloured plaster is painted with an NHL-lime color.

    In this thesis, we have not taken into account the economic aspects of material selections and work methods.

  • 39.
    Bergh, Jonas
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Klockars, Oscar
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Mall för jämförelse av ytterväggar i byggprojekt: Examensarbete i jämförande av ytterväggar för byggprojekt av flerbostadshus med en Excelmall2017Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The construction industry has many different exterior walls in projects. It is often difficult and time consuming to find out which of the exterior wall options is best for a specific project. In the bachelor thesis a template has been developed to compare prefabricated outer walls; Heat transfer coefficient (U value), working hours, materials and labor costs, waste in production, differences in usage area and difference in revenue depending on the thickness of the wall.

    Through tests using programs for cost calculation and U-value calculation, the template has been examined to match those values. As a result, total costs differed 0.002-2.395%, duration

    of the project 0-0.007% and U-value 2.4%.

    Comparison between two different wall types has been made to Järntorget's request. The single wall is a prefabricated infill wall consisting of mineral wool insulation with steel bars and the other a load-bearing concrete wall with PIR insulation. The result of the comparison showed that the prefabricated infill wall was the most profitable option.

    A third exterior wall was also added to the comparison to find a better alternative. It is a prefabricated infill wall with PIR insulation with low proportion of continuous steel studs. The result showed that the prefabricated infill wall with PIR insulation is the better option

  • 40.
    Berglund, Elin
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Spansk, Lina
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Bostadshyresmarknaden i Stockholms län: Marknadsundersökning av Stockholms läns hyresmarknad och dess framtida intresse av en ny marknadsplats2016Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
  • 41.
    Bergman, Louise
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology.
    Besiktning, byggfel och risker vid nyproduktjion av bostäder: En sammanställning och konsekvensanalys2016Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
  • 42.
    Bergqvist, Linn
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Smedberg, Johanna
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Energieffektiv etablering: En studie om hur energieffektiv etablering kan bidra till minskade koldioxidutsläpp2017Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    I Sverige ansvarar byggsektorn för en stor del av koldioxidutsläppen som bidrar till negativ klimatpåverkan. Höga koldioxidutsläpp ger behov till energieffektivisering inom byggprocesser. En rekommendation är att med hjälp av energieffektiv etablering i byggverksamhet kunna minska energiförbrukningen hos byggbodar och belysning som står för 70% av energiförbrukningen på en byggarbetsplats. Om FN:s 2-gradersmål skall uppnås måste utsläppen reduceras inom de närmsta åren.

    Rapportens syfte är att undersöka möjligheten att minska energiförbrukningen på byggarbetsplatser med hjälp av energieffektiv etablering för att nå FN:s 2-gradersmål

    . I studien granskas miljöcertifieringar som hjälpmedel för att reglera etableringens energiförbrukning. Metoder som tillämpades under arbetsgången var litteraturstudie, intervjuer med deltagare från Veidekke, Cramo och Stavdal samt en enkätundersökning inom Veidekkes verksamhet.

    Resultat visar att Veidekke har goda förutsättningar att förbättra sin etablering med avseende på energieffektivitet och bidra till minskat koldioxidutsläpp. Genom applicering av energieffektiv etablering inom byggverksamheten kan Veidekke uppnå 25% av sitt interna 2-gradersmål. BREEAM-SE kan tillämpas som hjälpmedel för att reglera arbetsplatsens energiförbrukning.

    Rekommendationer till Veidekke föreslås bestå av att skapa underlag och centrala riktlinjer för energieffektiv etablering som arbetsgrupper kan ta del av vid planering och utförande av tillfälliga arbetsplatser. Ökad medvetenhet hos företagets medarbetare bör ske genom utbildning, målsättning samt upprättande av projektanpassade energiplaner.

  • 43.
    Bergström, Fanny
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Gustafsson, Stephanie
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Kostnadsutveckling för lägenhetsuppgraderingar2016Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
  • 44.
    Bergström, Viktor
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Korrosion under värmeisolering av komponenter inom processindustri: Analys av skadeexempel2016Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
  • 45.
    Billowes, William
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Morad, Sara
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Lönsamhet med att planera i 4D: En utredning när lönsamhet uppstår vid planering i 4D2016Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
  • 46. Birgisdottir, H.
    et al.
    Moncaster, A.
    Wiberg, A. Houlihan
    Chae, C.
    Yokoyama, K.
    Balouktsi, M.
    Seo, S.
    Oka, T.
    Luetzkendorf, T.
    Malmqvist, Tove
    KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Sustainability Assessment and Management.
    IEA ESC annex 57 'evaluation of embodied energy and CO2eq for building construction'2017In: Energy and Buildings, ISSN 0378-7788, E-ISSN 1872-6178, Vol. 154, p. 72-80Article in journal (Refereed)
    Abstract [en]

    The current regulations to reduce energy consumption and greenhouse gas emissions (GHG) from buildings have focused on operational energy consumption. Thus legislation excludes measurement and reduction of the embodied energy and embodied GHG emissions over the building life cycle. Embodied impacts are a significant and growing proportion and it is increasingly recognised that the focus on reducing operational energy consumption needs to be accompanied by a parallel focus on reducing embodied impacts. Over the last six years the Annex 57 has 'addressed this issue, with researchers from 15 countries working together to develop a detailed understanding of the multiple calculation methods and the interpretation of their results. Based on an analysis of 80 case studies, Annex 57 showed various inconsistencies in current methodological approaches, which inhibit comparisons of results and difficult development of robust reduction strategies. Reinterpreting the studies through an understanding of the methodological differences enabled the cases to be used to demonstrate a number of important strategies for the reduction of embodied impacts. Annex 57 has also produced clear recommendations for uniform definitions and templates which improve the description of system boundaries, completeness of inventory and quality of data, and consequently the transparency of embodied impact assessments.

  • 47.
    Birgisson, Björn
    et al.
    University of Florida.
    Wang, Jianlin
    Roque, Reynaldo
    Sangpetngam, Boonchais
    A viscoelastic displacement discontinuity method for analysis of pavements with cracks2006In: International Journal on Road Materials and Pavement Design, ISSN 1468-0629, E-ISSN 2164-7402, Vol. 7, no 4, p. 417-455Article in journal (Refereed)
    Abstract [en]

    This paper presents a development of the displacement discontinuity boundary element method for modeling the linear viscoelastic behavior of asphalt mixtures and simulating crack propagation in asphalt pavements. The viscoelastic formulation is based on the correspondence principle, involving Laplace transformation of the constitutive equations and the associated boundary conditions. The time-dependent behavior of the asphalt mixtures is characterized by the Burger's or power law model. The associated transformed problem is solved in an analogous way to using the linear-elasticity-based displacement discontinuity method. The corresponding time-dependent viscoelastic solution is obtained using an efficient and robust algorithm for numerical Laplace inversion. A substructuring approach is employed to construct the layered formulation and higher order elements are used to capture the bending effect in the pavement structure. With incorporation of the hot mix asphalt (HMA) fracture mechanics, which is based on the concept that there is a dissipated creep strain energy (DCSE) threshold to cracking, the numerical framework can efficiently simulate crack onset and growth in asphalt pavements. Several examples are presented to verify the accuracy and efficiency of the numerical method and to demonstrate its application in modeling pavement cracking.

  • 48.
    Björck, Anton
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Källman, Marcus
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    VATTENSKADOR I KÖK: En studie av vattenskador i kök2017Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This report aims to review the current industry and government regulations for kitchen areas and wet rooms and to find out why water damages in kitchen areas in recent years have increased. The report also aims at finding out how housing association and insurance companies can work preventively on these issues. The study is based on the hypothesis that there are currently few industry rules regarding the kitchen and the prevention work undertaken by housing cooperatives and insurance companies is insufficient in the Stockholm area. This essay is based on empirical studies in the form of interviews, review of literature, previous studies in the subject and water damage statistics.

    Previous studies show that water damage in kitchens has increased in the total property stock while water damage in wet rooms has decreased. Reports from Länsförsäkringar show that water damages in 2014 were up to 29,000 leaks per year in Sweden. An increase of 45 percent in 10 years.

    Based on the interview replies, it can be found that there is a problem with water damages in the kitchen areas and this is confirmed when studying injury statistics from Länsförsäkringar and Vattenskadecentrum. The technological development has brought about a change and today it is in the kitchen you find most pressurized water pipelines, which is a development that today's industry organizations have not understood.

    The governing rules contained in Boverket's building regulations for kitchens are designed to allow residents to quickly detect leaking water from a leakage. It is a matter of urgency to solve the problem that occurs when residents are away from home and there is no possibility of detecting water leakage regardless of whether industry and government regulations are followed. This problem, coupled with the fact that insurance companies and industry organizations have long focused on damages related to wet rooms, has led to ignorance among consumers, builders and professionals when it comes to water damage in kitchens.

    However, in recent years, the industry has begun to understand that water damage has changed nature, but despite this the numbers of water damages are still increasing in the kitchen. If kitchen floors in the future will be equipped with floor wells and upturned waterproofing layer, it will reduce the amount of damage from a water leakage. Until then, as a property owner, a waterfuse should be installed which, in case of a leakage, immediately closes the water supply in taps and water pipes. Waterfuses do not only reduce the amount of damage, but also effectively solve the problem of leaking water.

    For housing cooperatives and insurance companies it is important to start demanding more from residents and policyholders. They have to work towards getting the right information to the right person at the right time. If insurance companies and housing cooperatives succeed in doing this they will have already done a lot in the prevention work.

  • 49.
    Björk, Folke
    et al.
    KTH, Superseded Departments, Civil and Architectural Engineering.
    Mattson, Bertil
    KTH, Superseded Departments, Civil and Architectural Engineering.
    Uppföljning av erfarenheter från Småhusskadenämndens arbete2002Report (Other academic)
  • 50.
    Björkegren, Anna
    et al.
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    Olsson, Matilda
    KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
    En studie om boendekvaliteti ett nybyggt bostadskomplex: Kvalitativ undersökning som omfattar Kv. Rosteriet 7 och hur detupplevs av de boende och dess omgivning2017Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The construction industry is responsible for creating sustainable housing at an individual

    level, even from an overall perspective. We are all affected indirectly by the architecture we

    meet in our homes, which affects our perceived quality of accommodation. The aim of this

    report is to investigate quality of housing by means of a case study of the newly built

    residential complex Kv. Rosteriet 7.

    Through surveys, interviews with people in the surroundings and deep interviews with

    inhabitants, this study has investigated whether the block meets Ola Nylanders eight

    property fields; Material and details, axiality, enclosure, motion, generality and flexibility,

    daylight, space organization and also house and city space. The accommodation surveys and

    deep interviews have also served as a basis for finding additional factors that are important

    for the quality of accommodation.

    The study has resulted in the completion of parts of the properties fields, including the rich

    daylight emissivity of the apartments and clear enclosure. The residents consider that

    qualities such as safety, community, common spaces and qualities in the apartment as

    technical equipment and permanent furnishings are of great value. These qualities together

    with Nylanders eight property fields contribute to a good quality of living and are

    encouraged to be used in the design of residential complex.

1234567 1 - 50 of 344
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