Selection of optimal intensity measures in probabilistic seismic demand models of highway bridge portfolios
Selection of optimal intensity measures in probabilistic seismic demand models of highway bridge portfolios
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DOI：
10.1002/eqe.782
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发表时间：
2008-04
影响因子：
4.5
通讯作者：
J. Padgett;B. G. Nielson;R. DesRoches
中科院分区：
文献类型：
--
作者：
J. Padgett;B. G. Nielson;R. DesRoches
概率地震需求模型是生成公路桥梁分析易损性曲线的一个常见且通常必不可少的步骤。由于这些概率模型传统上以单一地震烈度测量（IM）为条件，因此模型中的不确定性程度取决于所使用的IM。选择一个最佳的IM调节这些需求模型不是一件小事，并已成为众多研究的重点。与以往考虑IM选择的单一结构的研究不同，本研究评估了在为桥梁组合生成概率地震需求模型时使用的最佳IM，例如HAZUS‐MH。选择标准，如效率，实用性，充分性和危险的可计算性在选择过程中考虑。
Probabilistic seismic demand models are a common and often essential step in generating analytical fragility curves for highway bridges. With these probabilistic models being traditionally conditioned on a single seismic intensity measure (IM), the degree of uncertainty in the models is dependent on the IM used. Selection of an optimal IM for conditioning these demand models is not a trivial matter and has been the focus of numerous studies. Unlike previous studies that consider a single structure for IM selection, this study evaluates optimal IMs for use when generating probabilistic seismic demand models for bridge portfolios such as would be found in HAZUS‐MH. Selection criteria such as efficiency, practicality, sufficiency, and hazard computability are considered in the selection process.