论文部分内容阅读
基于Goodman接触面单元,在Clough--Duncan双曲线关系式的基础上改进了三元件宾厄姆体,建立了结构与土接触面的弹黏塑本构模型,使用ABAQUS的FRIC子程序对该模型进行了二次开发.通过改装的应力控制式结构-土接触面剪切试验仪进行了接触面长期剪切试验,验证了该接触面本构模型.研究结果表明:结构与土接触面的弹黏塑本构模型能较好地模拟接触面的力学特性和时间效应;正应力对结构与土接触面的力学行为影响较大,正应力越大,接触面的时间效应越显著.
Based on the Goodman contact surface element, based on the Clough - Duncan hyperbolic relation, the three element Bingham body is improved, and the elastic visco - plastic constitutive model of structure - soil contact surface is established. By using the ABAQUS FRIC subroutine, The second development of the model was carried out.The long-term shear test of the contact surface was conducted by the modified stress-controlled structure-soil contact shear tester, and the constitutive model of the contact surface was verified.The results show that the structure-soil contact surface The visco-elastic constitutive model can simulate the mechanical properties and the time effect of the contact surface well. Normal stress has a great influence on the mechanical behavior of the structure-soil contact surface. The larger the normal stress, the more obvious the time effect of the contact surface.