| 大跨度斜拉桥恒载非线性静力分析 |
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| 引用本文： | 辛克贵,刘钺强,杨国平.大跨度斜拉桥恒载非线性静力分析[J].清华大学学报(自然科学版),2002,42(6):818-821. |
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| 作者姓名： | 辛克贵 刘钺强 杨国平 |
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| 作者单位： | 1. 清华大学土木工程系,北京,100084,中国
2. 合乐中国有限公司,香港,中国 |
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| 基金项目： | 北京市自然科学基金资助项目 ( 8982 0 10 )，教育部回国留学人员基金资助项目 |
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| 摘 要： | 静力分析的精确程度对大跨度斜拉桥设计和施工过程具有很大影响。提出一套有限元方法 ,以弯曲能量作为目标函数确定斜拉索的初始张拉力 ,通过修正斜拉索的弹性模量 ,引入几何刚度矩阵和大挠度矩阵 ,综合考虑斜拉索垂度效应、梁柱效应和大位移效应 ,采用混合法求解系统方程。程序经过算例验证并应用于在建的重庆大佛寺长江大桥 ,取得了较好的效果 ,为该桥的施工控制提供了依据
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| 关 键 词： | 斜拉桥 非线性 垂度效应 梁柱效应 混合法 |
| 文章编号： | 1000-0054(2002)06-0818-04 |
| 修稿时间： | 2000年11月8日 |
Nonlinear static analysis of long-span cable-stayed bridges under dead loads |
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| XIN Kegui ,LIU Yueqiang ,YANG Guoping.Nonlinear static analysis of long-span cable-stayed bridges under dead loads[J].Journal of Tsinghua University(Science and Technology),2002,42(6):818-821. |
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| Authors: | XIN Kegui LIU Yueqiang YANG Guoping |
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| Institution: | XIN Kegui 1,LIU Yueqiang 1,YANG Guoping 2 |
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| Abstract: | Long-span cable-stayed bridges exhibit highly geometrically nonlinear behavior. The accuracy of their static analysis plays an important role during the design and construction processes. A finite element computation procedure was presented which includes the cable sag effect, the beam-column effect and the large displacement effect by modifying the elastic modulus of the cable and by introducing a geometric stiffness matrix and a large displacement matrix. The bending strain energy was chosen as the objective function to calculate the initial cable forces. An iterative-incremental procedure is described to solve the nonlinear system of equations. The method was used to analyze the Dafusi bridge, in Chongqing. The results provide a basis for the construction control. |
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| Keywords: | cable-stayed bridge nonlinear cable sag effect beam-column effect iterative-incremental procedure |
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