考虑横缝非线性作用的拱坝拱梁分载动力分析方法  

Dynamic analysis method of arch dams by multi-arch-cantilever method considering nonlinear contact of transverse joints

作　　者：李同春[1] 任灏[1] 赵兰浩[1] 

机构地区：[1]河海大学水利水电工程学院

出　　处：《水力发电学报》2009年第5期57-61,共5页Journal of Hydroelectric Engineering

基　　金：国家自然科学基金(90510017)

摘　　要：结合结点力学广义位移原理,在坝体横缝位置设置广义接触点对,将接触点对间的约束以接触力代替,导出接触点对上的位移、接触力与坝体梁单元出口结点位移及内力间的关系,进而导出包含缝面上广义结点在内的柔度矩阵,根据缝面上的接触条件组装柔度矩阵,得到以接触力为未知量的求解方程。通过整体拱梁法和接触缝面非线性迭代的交替求解,实现了拱梁分载法中对拱坝横缝的静动力非线性接触过程的模拟。算例表明了本文分析方法的正确性。The pairs of contact points are adopted to record the generalized-displacements of the transverse joints of arch darns. By applying the generalized displacement principle of nodal mechanics, the relationships of the nodal contact forces and displacements of the joints versus the internal forces and displacements on the exit nodes of beam elements can be derived. And then the flexibility matrix involving all the nodes on the joints can be also derived. By adopting the muhi-arch-eantilever method and a contact iterative method, the nonlinear contact of transverse joints can be simulated for static and dynamic cases of arch dams. A test case is given to verify the method.

关 键 词：水工结构 动力分析 拱梁分载法 拱坝 广义位移法 横缝 接触非线性 

分 类 号：TV312[水利工程—水工结构工程]