Laboratory element and centrifuge tests from LEAP-UCD-2017 and LEAP-Asia-2019 were used for model calibration and evaluation in a dynamic coupled analysis of a saturated and gently sloped deposit of sand subjected to base excitation. The paper focuses on using a recently proposed novel constitutive ingredient for modeling the post-liquefaction large cyclic shear strains in sands. An existing critical state compatible, bounding surface plasticity reference model is used, with and without this new constitutive ingredient, to explore its improved modeling capabilities. The constitutive model was first calibrated based on available laboratory element tests on Ottawa-F65 sand, and compared to the reference model showed significantly improved performance in capturing the strain-based liquefaction strength curve of a series of undrained hollow cylinder cyclic torsional shear tests. The calibrated models were used in Class-C prediction of the slope surface deformation in five centrifuge tests on a mildly sloping liquefiable ground of the same soil subjected to dynamic loading, in the three-dimensional finite difference program FLAC^3D. The simulation results were compared with experiments in terms of acceleration history, spectral response, excess pore water pressure development, and horizontal displacement evolution at specified control points. The vectors and contours of displacements at the end of shaking also revealed a pattern of slope deformation consistent with that of a gently sloped liquefiable ground. Following the insights from the performance of the models in simulation of the slope response, the calibration was adjusted to more realistically account for the impact of initial static shear stress on the development of post-liquefaction shear strains. The models were again used for Class-C1 prediction of the slope deformation of the same centrifuge tests. The overall assessment revealed the capabilities and limitations of the models in simulating the soil liquefaction strength and its post-liquefaction response.

LEAP-UCD-2017和LEAP-Asia-2019的实验室元素和离心机测试用于模型耦合和模型的动态耦合分析，该分析对经过基础激发的饱和且缓坡的砂岩沉积物进行了动态耦合分析。本文着重于使用最近提出的新型本构成分对砂土中液化后的大循环剪切应变进行建模。使用现有的临界状态兼容的有界表面可塑性参考模型（带有或不带有此新的本构成分）来探索其改进的建模功能。首先根据可在渥太华F65砂上进行的实验室元素测试对本构模型进行校准，与参考模型相比，在一系列不排水空心圆柱体循环扭转剪切试验中，基于应变的液化强度曲线的捕获性能显着提高。在三维有限差分程序FLAC中，将校准后的模型用于C级预测坡面表面变形的五次离心试验中，该试验在相同土体的轻度倾斜液化地面上经受了动态载荷^3D。在加速历史，光谱响应，过量孔隙水压力发展和在指定控制点的水平位移演化方面，将模拟结果与实验进行了比较。振动结束时位移的向量和轮廓线也显示出与轻度倾斜的可液化地面一致的边坡变形模式。从模型在边坡响应模拟中的性能中得出的见解之后，对标定进行了调整，以更实际地说明初始静态剪应力对液化后剪应变发展的影响。该模型再次用于同一离心机测试的C1类坡度变形预测。