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Probabilistic structural response assessment using vector-valued intensity measures

机译：使用矢量值强度测度的概率结构响应评估

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摘要

Methods for using scalar and vector ground motion intensity parameters to estimate the probabilistic relationship between ground motion intensity and structural response are described and compared. Options include using regression analysis on structural analysis results from a set of unsealed (or uniformly scaled) ground motions, or fitting a probability distribution to the analysis results from scaled ground motions analysed using incremental dynamic analysis and related methods. Past methods for using scalar ground motion intensity are reviewed, and methods for utilizing improved vector-valued intensity measures (IMs) are proposed. 'Hybrid' estimation methods that obtain the benefit of vector-valued IMs using simplified techniques such as careful record selection are also discussed. The results are then combined with models for ground motion occurrence obtained from probabilistic seismic hazard analysis to compute seismic reliability, and the results obtained from the various methods are compared. In general, a tradeoff must be made between the accuracy of the functional relationship between ground motion intensity and structural response versus the number of structural analyses needed for estimation.
机译：描述并比较了使用标量和矢量地震动强度参数来估计地震动强度与结构响应之间的概率关系的方法。选项包括对来自一组未密封（或均匀缩放）的地震动的结构分析结果进行回归分析，或对使用增量动态分析和相关方法分析的缩放后的地震动的分析结果拟合概率分布。回顾了过去使用标量地面运动强度的方法，并提出了使用改进的矢量值强度量度（IM）的方法。还讨论了使用简化技术（例如精心选择的记录）获得矢量值IM优势的“混合”估计方法。然后将结果与通过概率地震灾害分析获得的地震动发生模型相结合，以计算地震可靠度，并比较从各种方法获得的结果。通常，必须在地震动强度和结构响应之间的函数关系的精度与估算所需的结构分析的数量之间进行权衡。

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