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Structural Optimization of Concrete Slab Frame Bridges Considering Investment Cost
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.
2016 (English)In: Journal of Civil Engineering and Architecture, ISSN 1934-7359, E-ISSN 1934-7367, Vol. 10, 982-994 p.Article in journal (Refereed) Published
Abstract [en]

The present study investigates computer-automated design and structural optimization of concrete slab frame bridges considering investment cost based on a complete 3D model. Thus, a computer code with several modules has been developed to produce parametric models of slab frame bridges. Design loads and load combinations are based on the Eurocode design standard and the Swedish design standard for bridges. The necessary reinforcement diagrams to satisfy the ultimate and serviceability limit states, including fatigue checks for the whole bridge, are calculated according to the aforementioned standards. Optimization techniques based on the genetic algorithm and the pattern search method are applied. A case study is presented to highlight the efficiency of the applied optimization algorithms. This methodology has been applied in the design process for the time-effective, material-efficient, and optimal design of concrete slab frame bridges

Place, publisher, year, edition, pages
David Publishing Company, 2016. Vol. 10, 982-994 p.
Keyword [en]
Slab frame bridge, structural design, structural optimization, genetic algorithm, pattern search method
National Category
Infrastructure Engineering
Research subject
Civil and Architectural Engineering
Identifiers
URN: urn:nbn:se:kth:diva-202946DOI: 10.17265/1934-7359/2016.09.002OAI: oai:DiVA.org:kth-202946DiVA: diva2:1079376
Note

QC 20170314

Available from: 2017-03-08 Created: 2017-03-08 Last updated: 2017-03-14Bibliographically approved
In thesis
1. Slab Frame Bridges: Structural Optimization Considering Investment Cost and Environmental Impacts
Open this publication in new window or tab >>Slab Frame Bridges: Structural Optimization Considering Investment Cost and Environmental Impacts
2017 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

This research encompasses the automated design and structural optimization of reinforced concrete slab frame bridges, considering investment costs and environmental impacts. The most important feature of this work is that it focusses on realistic and complete models of slab frame bridges rather than on optimization of only individual members or sections of a bridge. The thesis consists of an extended summary of publications and three appended papers. In the first paper, using simple assumptions, the possibility of applying cost-optimization to the structural design of slab frame bridges was investigated. The results of the optimization of an existing constructed bridge showed the potential to reduce the investment cost of slab frame bridges. The procedure was further developed in the second paper. In this paper, automated design was integrated to a more refined cost-optimization methodology based on more detailed assumptions and including extra constructability factors. This procedure was then applied to a bridge under design, before its construction. From the point of view of sustainability, bridge design should not only consider criteria such as cost but also environmental performance. The third paper thus integrated life cycle assessment (LCA) with the design optimization procedure to perform environmental impact optimization of the same case study bridge as in the second paper. The results of investment cost and environmental impact optimization were then compared. The obtained results presented in the appended papers highlight the successful application of optimization techniques to the structural design of reinforced concrete slab frame bridges. Moreover, the results indicate that a multi-objective optimization that simultaneously considers both environmental impacts and investment cost is necessary in order to generate more sustainable designs. The presented methodology has been applied to the design process for a time-effective, sustainable, and optimal design of concrete slab frame bridges.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2017. 30 p.
Series
TRITA-BKN. Bulletin, ISSN 1103-4270 ; 146
Keyword
Slab frame bridge, Structural design, Cost optimization, Optimization of environmental impact, Life cycle assessment, Genetic algorithm, Pattern search method
National Category
Infrastructure Engineering
Research subject
Civil and Architectural Engineering
Identifiers
urn:nbn:se:kth:diva-202948 (URN)978-91-7729-329-3 (ISBN)
Presentation
2017-05-23, M108, Brinellvägen 23, Stockholm, 15:30 (English)
Opponent
Supervisors
Funder
Swedish Transport Administration
Note

QC 20170316

Available from: 2017-03-16 Created: 2017-03-08 Last updated: 2017-03-16Bibliographically approved

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