【摘要】 以大跨度斜拉立体桁架两塔三跨和一塔两跨两种常用的结构体系为对象,研究了在水平罕遇地震作用下的弹塑性地震反应,计算中考虑了几何非线性和材料非线性,其中材料非线性来源于立体桁架杆件的非线性。通过计算,找到了立体桁架在强震作用下的薄弱部位,并对弹性和弹塑性计算结果作了对比,其结论可供工程设计人员在设计时参考。更多还原

【Abstract】 In this paper,under severe horizontal earthquake,elasto-plastic seismic response behavior about systems of two spans with one tower and three spans with two towers for cable-stayed space truss are studied by response spectrum method and time history analysis procedure.Geometric and material nonlinearity are considered,in which material nonlinearity only includes members of space truss.Weak locations of space truss can be found.Through comparing the results of elastic and elasto-plastic analysis,some conclusion can be drawn for reference to engineers.更多还原