Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Transportation System Direct Loss Exceedence Analysis and Subsystem Reliability under Retrofit Action
This paper introduces an efficient method for quantifying the impact of bridge retrofit on subsystem reliability and risk to transportation networks. This study also demonstrates the significant influence of ground motion and damage correlations in quantifying the benefits of mitigation. These concepts are illustrated through a case study for an existing transportation subsystem in Contra Costa County, CA. After retrofit of critical components, a mean direct loss reduction of 50% and an increase in network reliability of 40% is achieved for the 475 year return period. Incorporating statistical dependence in ground motions and bridge damage resulted in a wide band of uncertainty. Bounds on subsystem failure associated with a 1% annual rate of exceedence decreased from 2.5% – 8% to 1.2% – 5.5% after retrofit of critical bridges. While the relative importance of critical bridges to subsystem reliability was sensitive to seismological parameters and statistical dependence, the subset of bridges identified as critical were consistent in all cases.
Transportation System Direct Loss Exceedence Analysis and Subsystem Reliability under Retrofit Action
This paper introduces an efficient method for quantifying the impact of bridge retrofit on subsystem reliability and risk to transportation networks. This study also demonstrates the significant influence of ground motion and damage correlations in quantifying the benefits of mitigation. These concepts are illustrated through a case study for an existing transportation subsystem in Contra Costa County, CA. After retrofit of critical components, a mean direct loss reduction of 50% and an increase in network reliability of 40% is achieved for the 475 year return period. Incorporating statistical dependence in ground motions and bridge damage resulted in a wide band of uncertainty. Bounds on subsystem failure associated with a 1% annual rate of exceedence decreased from 2.5% – 8% to 1.2% – 5.5% after retrofit of critical bridges. While the relative importance of critical bridges to subsystem reliability was sensitive to seismological parameters and statistical dependence, the subset of bridges identified as critical were consistent in all cases.
Transportation System Direct Loss Exceedence Analysis and Subsystem Reliability under Retrofit Action
Lee, R. G. (Autor:in) / Fan, Y. Y. (Autor:in) / Kiremidjian, A. S. (Autor:in)
Technical Council on Lifeline Earthquake Engineering Conference (TCLEE) 2009 ; 2009 ; Oakland, California, United States
TCLEE 2009 ; 1-11
24.06.2009
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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