| 悬索桥结构分析中鞍座单元的研究及应用 |
| |
| 引用本文： | 齐东春,沈锐利,陈卫国,唐茂林.悬索桥结构分析中鞍座单元的研究及应用[J].桥梁建设,2011(1). |
| |
| 作者姓名： | 齐东春 沈锐利 陈卫国 唐茂林 |
| |
| 作者单位： | 1. 西南交通大学桥梁工程系,四川,成都,610031
2. 浙江省舟山连岛工程建设指挥部,浙江,舟山,316000 |
| |
| 摘 要： | 在悬索桥的有限元计算中往往忽略鞍座对主缆的影响而直接采用成桥理论IP点建模,这种简化会对主缆线形计算带来误差。为提高有限元计算悬索桥主缆线形的精度,提出一种能精确模拟主缆和鞍座约束关系的3节点单元——鞍座单元。采用该单元可基于弹性悬链线的解析解迭代出主缆与鞍座的切点坐标,再根据该单元刚度矩阵元素的含义并利用静力平衡条件直接推导出其切线刚度矩阵。以国内某主跨1 650 m的悬索桥为例,将鞍座单元的切线刚度矩阵引入到该桥有限元整体计算中,计算结果表明,鞍座单元能精确模拟主缆与鞍座的实际情况,将其引入悬索桥的结构计算中能大幅度提高计算精度。
|
| 关 键 词： | 悬索桥 鞍座 主缆 悬链线 刚度矩阵 |
Research and Application of Saddle Element in Structural Analysis of Suspension Bridge |
| |
| QI Dong-chun,SHEN Rui-li,CHEN Wei-guo,TANG Mao-lin.Research and Application of Saddle Element in Structural Analysis of Suspension Bridge[J].Bridge Construction,2011(1). |
| |
| Authors: | QI Dong-chun SHEN Rui-li CHEN Wei-guo TANG Mao-lin |
| |
| Institution: | QI Dong-chun1,SHEN Rui-li1,CHEN Wei-guo2,TANG Mao-lin1(1.Department of Bridge Engineering,Southwest Jiaotong University,Chengdu610031,China,2.Zhejiang Provincial Construction Headquarters of ZhoushanMainland and Islands Link Project,Zhoushan 316000,China) |
| |
| Abstract: | In the finite element calculation of suspension bridge,the impact of saddle on main cables is often ignored while the theoretic IP point of completed bridge will be directly used to establish models,which may result in errors in the calculation of geometric shape of the main cables owing to the simplifying.To enhance the calculation accuracy of the geometric shape of the main cables by the finite element method,a type of the 3-node element,that is,the saddle element,which can accurately simulate the restrai... |
| |
| Keywords: | suspension bridge saddle main cable catenary stiffness matrix |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
