摘要
使用截面分层法计算斜拉桥混凝土主梁在不同轴力下的弯矩-曲率曲线。并使用有限元杆系模型的塑性铰方法对某主跨为140m的斜拉桥进行材料非线性分析,并将非线性分析与线性分析进行对比。发现材料非线性对个别拉索索力影响达到84%。建议进行斜拉桥设计时计入材料非线性影响。
By dividing the cross-section into stratum,this paper calculated the Moment-Curvature graphics of the concrete girder which is under different axis force.In the paper,a bar-system FEM model of a 140m span cable-stayed bridge was built,and material nonlinear analysis was undertaken with plastic-hinge method being used.It was found that the effect of material nonlinearity reached 84%.Material nonlinearity should be calculated in the engineering of cable-stayed bridge.It was found that the effect of material nonlinearity reached 84%.Material nonlinearity should be calculated in the engineering of cable-stayed bridge.
出处
《低温建筑技术》
2010年第10期49-51,共3页
Low Temperature Architecture Technology
关键词
斜拉桥
材料非线性
弯矩-率曲
cable-stayed bridge
material nonlinearity
moment-curvature
