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Procurement of the most cost-efficient bridge through incorporating LCCA with BMSs: Case-Study of the Karlsnäs Bridge in Sweden
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: Journal of Bridge Engineering, ISSN 1084-0702, E-ISSN 1943-5592Article in journal (Other academic) Submitted
Abstract [en]

Life-cycle cost analysis (LCCA) has recognized potential for rationalizing bridge procurement, but its use in this context is far from systematic and the integration of LCCA findings in decisions is often far from robust. Furthermore, although most bridge management systems (BMSs) include databases of relevant information, agencies do not use them effectively to improve future bridge investment decisions. This paper introduces a comprehensive approach for agencies to exploit their BMS to procure the most cost-efficient bridge design through fair design-build (D-B) tendering processes. The approach incorporates use of a novel LCCA technique, LCC Added-Value Analysis, that can be conveniently integrated with public agencies’ established procurement procedures and maintains contractors’ freedoms in D-B processes. The proposed approach allows bridge procurers to establish monetary LCC-efficient benchmarks and embed them in tender documents as core specifications. Hence the lowest LCC bid can be employed as the contract award criterion, rather the lowest bid in initial investment terms. The Swedish Transport Administration has recently procured several bridges using the approach, thereby gaining considerable cost savings. A presented case-study provides insights into various aspects of bridges’ LCC and illustrates analytical steps that other agencies could apply in bridge procurement.

Keyword [en]
Bridge, Procurement, Life Cycle Cost Analysis, Life Cycle Assessment, Sustainable, User Cost, Aesthetic, Contract, Tender, Repair, LCC, LCA.
National Category
Construction Management Infrastructure Engineering Other Civil Engineering Industrial Biotechnology
Research subject
SRA - Transport; SRA - Production; Järnvägsgruppen - Infrastruktur; The KTH Railway Group - Tribology
Identifiers
URN: urn:nbn:se:kth:diva-133227OAI: oai:DiVA.org:kth-133227DiVA: diva2:660272
Note

QS 2013

Available from: 2013-10-29 Created: 2013-10-29 Last updated: 2017-12-06Bibliographically approved
In thesis
1. 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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