Abstract This paper presents numerical simulations of a liquefiable sloping ground related to LEAP-UCD-2017 and LEAP-Asia-2019 (Liquefaction Experiments and Analysis Projects) dynamic centrifuge model tests (Type-C phase) conducted by various institutions. The numerical simulations are performed using a pressure-dependent constitutive model implemented with the characteristics of dilatancy, cyclic mobility and associated shear deformation. The soil parameters are determined based on a series of available stress-controlled cyclic triaxial and torsional shear tests for matching the liquefaction strength curves of Ottawa F-65 sand with relative densities Dr. = 65% and 60% in calibration phase of LEAP-UCD-2017 and LEAP-Asia-2019, respectively. The computational framework for the dynamic response analysis is discussed and the computed results are presented for the selected centrifuge experiments during Type-C phase. Measured time histories (e.g., displacement, acceleration and excess pore pressure ratio) of these experiments are reasonably captured. Comparisons between the numerical simulations and measured results showed that the pressure-dependent constitutive model as well as the overall employed computational framework have the potential to predict the response of the liquefiable sloping ground, and subsequently realistically evaluate the performance of an equivalent soil system subjected to seismically-induced liquefaction.

中文翻译：

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可液化坡地地震响应LEAP离心试验数值模拟

摘要 本文介绍了与 LEAP-UCD-2017 和 LEAP-Asia-2019（液化实验和分析项目）动态离心模型试验（Type-C 阶段）相关的可液化倾斜地面的数值模拟。使用具有剪胀性、循环迁移率和相关剪切变形特性的压力相关本构模型进行数值模拟。土壤参数是基于一系列可用的应力控制循环三轴和扭转剪切试验确定的，以匹配 LEAP-UCD 校准阶段相对密度 Dr. = 65% 和 60% 的渥太华 F-65 砂的液化强度曲线-2017 年和 LEAP-Asia-2019 年。讨论了动态响应分析的计算框架，并给出了在 Type-C 阶段选定的离心机实验的计算结果。这些实验的测量时间历程（例如，位移、加速度和超孔隙水压力比）被合理地捕获。数值模拟和测量结果之间的比较表明，与压力相关的本构模型以及整体采用的计算框架有可能预测可液化倾斜地面的响应，并随后真实地评估受压力影响的等效土壤系统的性能。地震引起的液化。这些实验的加速度和超孔隙水压力比）被合理地捕获。数值模拟和测量结果之间的比较表明，与压力相关的本构模型以及整体采用的计算框架有可能预测可液化倾斜地面的响应，并随后真实地评估受压力影响的等效土壤系统的性能。地震引起的液化。这些实验的加速度和超孔隙水压力比）被合理地捕获。数值模拟和测量结果之间的比较表明，与压力相关的本构模型以及整体采用的计算框架有可能预测可液化倾斜地面的响应，并随后真实地评估受压力影响的等效土壤系统的性能。地震引起的液化。