摘要
以一座在建的多塔结合梁斜拉桥为工程背景,运用大型有限元结构分析软件ANSYS,建立多塔斜拉桥的空间非线性有限元模型,考虑拉索垂度效应、结构大位移和梁柱效应3种几何非线性因素,进行了大跨度多塔斜拉桥空间非线性静力分析,给出了桥梁结构主梁、桥塔以及斜拉索的位移及内力云图,结果表明:多塔斜拉桥的主跨跨中位移变形最大,为33.2 cm;边塔弯矩随高度的变化各不相同,塔底弯矩最大;斜拉索的最大索力在边塔外侧的辅助墩附近。
A cable-stayed bridge with multi pylons is regarded as the project example.Nonlinear model is purposed by the large-scale finite element analysis software ANSYS.The geometrically nonlinear factors,including cable sag,beam-column effect and large displacement,are fully considered.The nonlinear behavior of whole structure is analyzed under dead load.Displacement and internal force convective of girders,towers and cables are given.The results showed that the vertical displacement of main span of cable-stayed bridges with multi pylon is 33.3cm.Bending moment of edge tower change with height,and the largest bending moment is tower bottom.The maximum cable force is near auxiliary pier of edge tower outside.
出处
《交通科技》
2011年第3期7-10,共4页
Transportation Science & Technology
关键词
多塔斜拉桥
ANSYS
非线性
静力分析
multi pylon cable-stayed bridge
ANSYS
nonlinear
static analysis
