接触面薄层单元耦合本构模型

A coupled constitutive model for interface thin\|layer element

接触面单剪试验显示， 在土与结构接触界面土体一侧存在剪切错动带， 剪切过程中的土尤其是粗颗粒土出现明显的剪胀／ 剪缩效应． 为了反映剪切错动带的应力应变特征， 更恰当地模拟土与结构的相互作用， 提出了接触面薄层单元耦合本构模型． 同时讨论了薄层单元厚度的确定问题．

Simple shear test shows that there is a shear zone in soil nearby the contact surface, in which the shear dilation/compression effect exists during shearing. In order to simulate the stress\|strain relation of this shear zone and to simulate the interaction between soil and structure, a coupled constituive model is proposed and the thickness is discussed.