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Site-specific liquefaction fragility analysis: Cloud, stripe, and incremental approaches

机译:特异性液化脆弱性分析:云,条纹和增量方法

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摘要

This article adapts a handful of procedures from performance-based earthquake engineering for use in estimating the probability of liquefaction triggering. The resulting approach, defined as liquefaction fragility analysis (LFA), produces site-specific fragility functions for liquefaction. These fragility functions incorporate site-specific, system-level effects not captured by existing, broader methods, but require more detailed knowledge of both the subsurface conditions and the seismic hazard at the site. LFA accounts for system-level effects such as pore pressure migration, dynamic layer-to-layer interaction, and partial saturation to the extent that these phenomena can be captured in the constitutive models used in nonlinear site response analyses. Multiple approaches for selecting ground motions for LFA are discussed and illustrated using a case study of a site in Los Angeles, California. The computational expense of using LFA for probabilistic estimate of future liquefaction seismic performance is also discussed.
机译:本文适用于基于性能的地震工程的少数程序,以估计液化触发的概率。所得方法定义为液化碎片分析(LFA),产生特定于液化的脆性函数。这些脆弱功能包含现场特定的系统级效果,未被现有的更广泛的方法捕获,但需要更详细地了解地下条件和现场的地震危险。 LFA占系统级效应,例如孔隙压力迁移,动态层到层交互和部分饱和度,以及在非线性站点响应分析中使用的本结构型模型中可以捕获这些现象的程度。使用加利福尼亚州洛杉矶的场地进行讨论和说明了对LFA进行地面运动的多种方法。还讨论了使用LFA进行未来液化地震性能的概率估计的计算费用。

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  • 来源
    《Earthquake Engineering & Structural Dynamics》 |2021年第9期|2529-2550|共22页
  • 作者单位

    CALTECH Dept Mech & Civil Engn Pasadena CA 91125 USA;

    Univ Colorado Dept Civil Environm & Architectural Engn Boulder CO 80309 USA;

    Univ Colorado Dept Civil Environm & Architectural Engn Boulder CO 80309 USA;

    Univ Colorado Dept Civil Environm & Architectural Engn Boulder CO 80309 USA;

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