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Reliability-Based Optimum Design of High-Speed Railway Steel Bridges Considering Bridge/Rail Longitudinal Analysis and Bridge/Vehicle Dynamic Effect  

Lee, Jong-Soon ((주)교량과고속철도 부설연구소)
Ihm, Yeong-Rok (한국철도시설공단 수도권지역본부)
Publication Information
Journal of the Korean Society for Railway / v.12, no.6, 2009 , pp. 974-982 More about this Journal
Abstract
To improve the effectiveness and economics the bridge design methodology considering the bridge/rail longitudinal analysis and bridge/vehicle dynamic effect suggested in this study. The reliability-based Life-Cycle Costs(LCC) effective optimum design is applied to a 2-main steel girder bridge, 5$\times$(1@50m) for comparison with conventional design, initial cost optimization and equivalent LCC optimization. As a result of the optimum design based on reliability, it may be stated that the design of High-Speed railway bridges considering the bridge/rail longitudinal analysis and bridge/vehicle dynamic effect are more efficient than typical existing bridges and LCC optimization without respect to bridge/rail longitudinal analysis and bridge/vehicle dynamic effect. The result of optimization design considering the interaction, design methodology suggested in this study, is higher than result of initial cost optimization design in initial cost, but that has the advantage than result of initial cost optimization design in expected LCC.
Keywords
Reliability-Based Optimum Design; CWR; Bridge/Rail Longitudinal Analysis; Bridge/Vehicle Dynamic Effect; ALM-BFGS;
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Times Cited By KSCI : 2  (Citation Analysis)
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