循环荷载作用下接触面的边界面模型研究

Bounding surface model for soil-structure interface under cyclic loading

基于边界面的概念,建立了循环荷载作用下砂与结构物接触面的边界面塑性模型,以描述其剪切应力与剪应变的滞回特性。该模型考虑了初始相对密度和法向应力的影响,同时在弹性模量中引入损伤因子,反映了接触面在循环荷载下逐渐硬化的性质。通过比较理论计算与试验结果,显示了该模型的合理性。

Based on the concept of bounding surface, a bounding surface plastic model for sand-structure interface is developed; it can describe the hysteretic characteristics of a shear stress and strain curve, Initial relative density and normal pressure are included in the model; and a damage factor is also introduced in the olastic modulus in order to characterize the hardening interface response under cyclic loading gradually. The predicted response and tost data are compared; and the proposed model is proved to be reasonable and credible.