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Performance-based assessment of the seismic pseudo-static coefficient used in slope stability analysis
Soil Dynamics and Earthquake Engineering ( IF 4 ) Pub Date : 2020-06-01 , DOI: 10.1016/j.soildyn.2020.106109
Jorge Macedo , Gabriel Candia

Abstract 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.

中文翻译:

用于边坡稳定性分析的地震拟静力系数的基于性能的评估

摘要 拟静力边坡稳定性程序经常被用来评价边坡系统的抗震性能,至少在初始评价阶段是这样。为了产生有意义的结果,这些方法应该依赖于代表现有地震需求和被评估边坡系统特性的参数。本研究提出了一种基于性能的概率程序,以合理和透明的方式估计地震伪静态系数 (SPC)。该程序在评估地震引起的位移 (D) 危险曲线方面有其基石,它提供的 SPC 估计值与斜坡系统可以承受的允许 D 水平、滑动质量的特性、在斜坡地点,以及危害设计水平或重现期。所提出的程序可用于评估可能受到来自不同构造环境(即俯冲和浅地壳地震)的地震影响的各种斜坡系统的抗震性能,并已在一个计算平台中实施,有利于其在工程中的直接使用实践。南美洲(即秘鲁、智利、厄瓜多尔)、墨西哥和美国的实施是完全自动化的,但提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。俯冲和浅地壳地震),并已在一个计算平台中实现,这有助于其在工程实践中的直接使用。南美洲(即秘鲁、智利、厄瓜多尔)、墨西哥和美国的实施是完全自动化的,但提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。俯冲和浅地壳地震),并已在一个计算平台中实现,这有助于其在工程实践中的直接使用。南美洲(即秘鲁、智利、厄瓜多尔)、墨西哥和美国的实施是完全自动化的,但提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。
更新日期:2020-06-01
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