A new method is proposed to calibrate the key parameters of a two-surface elastoplastic model to simulate the sand-structure interface under monotonic shear loading. A series of DEM simulations, in which a few sand-structure interface parameters and boundary conditions are considered, are conducted to guide the establishment of a calibration method. The simulation results, together with other researchers’ test results, are used to provide semiempirical and empirical equations for parameter calibration using the two-surface elastoplastic constitutive model. Numerical calculations are performed using the new method and the model’s performance is evaluated for dense and loose sands, under constant normal load and constant normal stiffness conditions by comparison with experimental results, which are shown to be in good agreement with the experimental data.

提出了一种新的标定两面弹塑性模型关键参数的方法，以模拟单调剪切载荷作用下的砂土结构界面。进行了一系列DEM模拟，其中考虑了一些砂结构界面参数和边界条件，以指导标定方法的建立。仿真结果与其他研究人员的测试结果一起，用于提供使用两面弹塑性本构模型进行参数校准的半经验和经验方程式。使用新方法进行了数值计算，并与实验结果进行了比较，在恒定法向载荷和恒定法向刚度条件下，对稠密和疏松砂土的模型性能进行了评估，