纵缝对重力坝地震反应影响的研究

Influence of longitudinal joint on seismic response of gravity dam

本文采用显式有限元结合人工透谢边界进行波动分析 ,配合动接触力模型考虑纵缝接触非线性问题 ,用静动组合方法考虑静动荷载的耦合作用 ,形成新的重力坝地震反应分析的计算体系 ,对一典型的含纵缝重力坝进行了地震反应分析 .在考虑地基辐射阻尼的条件下得出了纵缝的存在及纵缝初始宽度、填充情况。

A calculation method and its program for nonlinear analysis of dam\|foundation seismic response are proposed.The wave simulation method is applied,by which the explicit finite element is combined with artificial transmitting boundary.The dynamic contact force model is introduced to consider the non\|linearity of dynamic opening and closing of longitudinal joint.A combined method is proposed to solve the couplin problem of the static and dynamic load.The analysis of a gravity dam is given to demonstrate the coupling effects of the initial width,filling and fricton factor on seismic response of dam proper.