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Performance-based assessment of the seismic pseudo-static coefficient used in slope stability analysis

机译：基于性能的边坡稳定性分析中的地震拟静力系数评估

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摘要

Pseudo-static slope stability procedures are often employed to evaluate the seismic performance of slope systems, at least in the initial evaluation stages. To yield meaningful results, these methods should rely on parameters that are representative of the existing seismic demand and the properties of the slope system being evaluated. This study proposes a performance-based probabilistic procedure to estimate the seismic pseudo-static coefficient (SPC) in a rational and transparent manner. The procedure has its cornerstone on the evaluation of seismically-induced displacement (D) hazard curves, and it provides SPC estimates that are consistent with the allowable D level that a slope system can sustain, the properties of the sliding mass, the seismic demand at the slope site, and the hazard design level or return period. The proposed procedure can be applied to evaluate the seismic performance of a wide range of slope systems potentially affected by earthquakes from different tectonic settings (i.e. subduction and shallow crustal earthquakes), and has been implemented in a computational platform that facilitates its straightforward use in engineering practice. The implementations are fully automated for South America (i.e., Peru, Chile, Ecuador), Mexico, and the United States, but the proposed framework can be applied worldwide. Finally, an illustrative example for the application of the procedure in the seismic stability assessment of a slope system is provided.
机译：至少在初始评估阶段，通常采用伪静态边坡稳定程序来评估边坡系统的抗震性能。为了产生有意义的结果，这些方法应依靠代表现有地震需求和被评估斜坡系统特性的参数。这项研究提出了一种基于性能的概率程序，以合理，透明的方式估算地震伪静态系数（SPC）。该程序是评估地震诱发位移（D）危险曲线的基础，它提供的SPC估计值与斜坡系统可以承受的允许D水平，滑动质量，地震条件下的地震需求相一致。斜坡位置以及危害设计水平或恢复期。所建议的程序可用于评估可能受到来自不同构造环境的地震（即俯冲和浅地壳地震）影响的各种斜坡系统的地震性能，并且已在便于其在工程中直接使用的计算平台中得以实现。实践。在南美（即秘鲁，智利，厄瓜多尔），墨西哥和美国，实现是完全自动化的，但是建议的框架可以在全球范围内应用。最后，提供了该程序在边坡系统地震稳定性评估中的应用示例。

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  • 来源
    《Soil Dynamics and Earthquake Engineering》 |2020年第6期|106109.1-106109.13|共13页
  • 作者

    Macedo Jorge; Candia Gabriel;

  • 作者单位

    Georgia Inst Technol Atlanta GA 30332 USA;

    Univ Desarrollo Concepcion Chile|Res Ctr Integrated Disaster Risk Management CIGID ANID FONDAP 15110017 Macul Chile;

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  • 正文语种 eng
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