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Applications of life-cycle costing for bridges and integration with bridge management systems
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Structural Engineering and Bridges.
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Structural Engineering and Bridges.
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Structural Engineering and Bridges.ORCID iD: 0000-0002-5447-2068
(English)In: Civil Engineering and ArchitectureArticle in journal (Refereed) Accepted
Abstract [en]

Many countries are using bridge management systems(BMSs) as the main toll for the effective management of their bridges. Althoughmany BMSs contain some forms of life-cycle cost analysis (LCCA), the use of LCCAin bridge engineering is scarce and LCCA has mainly been applied to supportdecisions related to existing bridges. This paper discuss the need of a BMSwith an integrated LCCA tool that can assist decision makers at all levels andwithin all phases in selecting the most cost-effective solution from an arrayof applicable alternatives. The paper introduces the Swedish Bridge and TunnelManagement System (BaTMan). A comprehensive LCCA implementation scheme will beillustrated, taking into account the bridge investment and management processin Sweden. The basic LCCA analysis tools as well as other helpful techniquesare addressed. A real case study is presented to demonstrate the recentimprovement of BaTMan particularly in the function of specifying the most-costeffective bridge repair strategy. The bridge user cost is included in the LCCA.The parameters that can influence the final decision are addressed andsensitivity analyses to study their impacts are performed.

Keyword [en]
Bridge, Management, life-Cycle Costing, LCC, Bridge Management System, BMS, BaTMan, repair.
National Category
Civil Engineering
Research subject
Järnvägsgruppen - Infrastruktur; SRA - Transport
Identifiers
URN: urn:nbn:se:kth:diva-72487OAI: oai:DiVA.org:kth-72487DiVA: diva2:487683
Funder
TrenOp, Transport Research Environment with Novel Perspectives
Note

QS 2012

Available from: 2012-01-31 Created: 2012-01-31 Last updated: 2013-10-29Bibliographically approved
In thesis
1. LCC Applications for Bridges and Integration with BMS
Open this publication in new window or tab >>LCC Applications for Bridges and Integration with BMS
2012 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

Bridges are vital links in many transport networks and represent a big capital investment for both governments and taxpayers. They have to be managed in a way that ensures society's needs are optimally met. In many countries, bridges are mainly managed using bridge management systems (BMSs). Although many BMSs contain some forms of life-cycle costing (LCC), the use of LCC in bridge engineering is scarce. LCC in many BMSs has mainly been applied within the bridge operation phase, even though it has several useful applications within the bridge entire life, from cradle to grave. This licentiate thesis discusses the need of a BMS with integrated comprehensive LCC tools that can assist decision-makers at all levels and within all phases in selecting the most cost-effective alternative from an array of applicable alternatives.

The thesis introduces the Swedish Bridge and Tunnel Management System (BaTMan). Acomprehensive integrated LCC implementation scheme is illustrated, taking into account the bridge investment and management process in Sweden. The basic LCC analytical tools as well as other helpful LCC techniques are addressed. Detailed case studies for real bridges at different investment phases are presented to demonstrate the recent improvement of BaTMan practically in the LCC integration. Cost records for 2,508 bridges extracted from BaTMan inventory data are used as input data in the presented case studies. Considering the same records, the average real and anticipated initial costs of different bridge types in Sweden will schematically be presented.

The thesis introduces a bridge LCC program developed over this research named "BaTMan-LCC". The reason for which this program was developed is to combine all possible LCC applications for bridges in one tool and facilitate its implementation. The sensitivity analysis as well as the LCC saving potential highlighted in the presented case studies emphasizes the feasibility and the possibility of developing BaTMan to accommodate the applications of BaTMan-LCC.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2012. vi, 44 p.
Series
Trita-BKN. Bulletin, ISSN 1103-4270 ; 111
Keyword
Bridge, Management, life-Cycle Costing, LCC, Bridge Management System
National Category
Civil Engineering
Research subject
SRA - Transport; Järnvägsgruppen - Infrastruktur
Identifiers
urn:nbn:se:kth:diva-90342 (URN)
Presentation
2012-03-16, M108, Brinellvägen 23, KTH,, Stockholm, 17:40 (English)
Opponent
Supervisors
Projects
ETSI
Funder
TrenOp, Transport Research Environment with Novel Perspectives
Note
QC 20120301Available from: 2012-03-01 Created: 2012-02-22 Last updated: 2012-03-01Bibliographically approved
2. Life-Cycle Costing: Applications and Implementations in Bridge Investment and Management
Open this publication in new window or tab >>Life-Cycle Costing: Applications and Implementations in Bridge Investment and Management
2013 (English)Doctoral thesis, comprehensive summary (Other academic)
Alternative title[en]
Sustainable and cost-efficient procurement and management of bridge infrastructure
Abstract [en]

A well-maintained bridge infrastructure is a fundamental necessity for a modern society that provides great value, but ensuring that it meets all the requirements sustainably and cost-effectively is challenging. Bridge investment and management decisions generally involve selection from multiple alternatives. All of the options may meet the functional demands, but their life-cycle cost (LCC), service life-span, user-cost, aesthetic merit and environmental impact may differ substantially. Thus, life-cycle analysis (LCCA, a widely used decision-support technique that enables comparison of the LCC of possible options), is essential. However, although LCCA has recognized potential for rationalizing bridge procurement and management decisions its use in this context is far from systematic and the integration of LCCA findings in decisions is often far from robust. Thus, the overall objective of the work underlying this thesis has been to contribute to the development of sustainable bridge infrastructures while optimizing use of taxpayers’ money, by robustly incorporating life-cycle considerations into bridge investment and management decision-making processes.

The work has introduced a full scheme for applying LCCA throughout bridges’ entire life-cycle. Several practical case studies have been presented to illustrate how an agency could benefit from use of a bridge management system (BMS) to support decisions related to the management of existing bridges and procure new bridges. Further developments include a comprehensive approach incorporating a novel LCCA technique, “LCC Added-Value Analysis”, which enables procurement of the most cost-efficient bridge design through a fair design-build (D-B) tendering process. A further contribution is a novel, holistic approach designed to enable procurement of bridges with the maximal possible sustainability (life-cycle advantages) under D-B contracts. The approach combines LCC Added-Value analysis with other techniques that make bridges’ aesthetic merit and environmental impact commensurable using an adapted concept named the willingness-to-pay-extra (WTPE).

The systematic analytical procedures and potential of LCCA to deliver major savings highlighted in this thesis clearly demonstrate both the feasibility and need to integrate LCCA into bridge procurement and management decisions. This need has been recognized by Trafikverket (the Swedish Transport Administration), which has implemented a software tool developed in the research (BaTMan-LCC) in its bridge and tunnel management system (BaTMan). This thesis introduces readers to the field, considers BaTMan and the bridge stock in Sweden, discusses the developments outlined above and obstacles hindering further implementation of LCCA, then presents proposals for further advances.

Place, publisher, year, edition, pages
KTH Royal Institute of Technology, 2013. x, 55 p.
Series
Trita-BKN. Bulletin, ISSN 1103-4270 ; 121
Keyword
Bridge, Cost, Life Cycle Cost Analysis, Procurement, Investment, Management
National Category
Civil Engineering Agricultural Sciences Environmental Engineering Natural Sciences
Identifiers
urn:nbn:se:kth:diva-133241 (URN)
Public defence
2013-11-13, Kollegiesalen, Brinellvägen 8, Kungliga Tekniska Högskolan, Stockholm, 13:00 (English)
Opponent
Supervisors
Note

QC 20131029

Available from: 2013-10-29 Created: 2013-10-29 Last updated: 2013-10-30Bibliographically approved

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