A series of nonlinear dynamic FE simulations have been performed to investigate the seismic performance of a flexible propped retaining wall in a saturated clay. The simulations have been carried out considering different acceleration time histories at the bedrock and two different inelastic soil models: the classical elastoplastic Modified Cam Clay model and the advanced hypoplastic model for clays proposed by Mašín (Int J Numer Anal Methods Geomech 29:311–336, 2005) equipped with the intergranular strains extension. The results of the simulations highlight the major role played by the choice of the constitutive model for the soil on the predicted seismic response, in terms of predicted wall displacements and structural loads. In particular, the results show that a key role is played by the model ability to correctly reproduce soil dilatancy as a function of the current stress state and loading history. This has a major impact on the inelastic volumetric deformations accumulated during the undrained seismic shearing and on the development of excess pore water pressures around the excavations.

中文翻译：

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关于饱和黏土中钢筋混凝土隔板墙的地震响应

已经进行了一系列非线性动态有限元仿真，以研究饱和黏土中柔性支撑挡土墙的抗震性能。考虑到基岩上不同的加速时间历史以及两种不同的非弹性土壤模型，进行了模拟：Mašín（Int J Numer Anal Methods Geomech 29：311–336）提出的经典弹塑性改性凸轮粘土模型和粘土的高级次塑性模型。 ，2005）配备了晶间应变扩展。模拟结果突出了在预测的地震响应方面，选择土的本构模型在预测的墙位移和结构荷载方面所起的主要作用。特别是，结果表明，根据当前应力状态和加载历史，模型正确地再现土壤膨胀性的能力发挥了关键作用。这对不排水地震剪切过程中积累的非弹性体积变形以及基坑周围多余的孔隙水压力的发展具有重大影响。