确定大跨径悬索桥主缆成桥线形的虚拟梁法  

Fictitious beam method for determination of main cable shape of long span suspension bridges

作　　者：肖汝诚[1] 贾丽君[1] 王小同[1] 

机构地区：[1]同济大学桥梁工程系

出　　处：《计算力学学报》1999年第1期108-114,共7页Chinese Journal of Computational Mechanics

基　　金：国家自然科学基金九.五重大项目

摘　　要：精确计算悬索桥主缆索形是悬索桥设计和实现施工开环控制的关键。本文通过柔索计算的虚拟梁法，导出了确定大跨径悬索桥主缆成桥线形的非线性方程组，建立了索型迭代的计算流程。算例计算表明，本文方法具有力学概念明确、计算速度快、精度高的特点。The determination of main cable shape is a key problem in the process of design and constructional unclosed loop control of long span suspension bridge. By means of fictitious beam method for calculating of flexible cable, nonlinear equations to determine main cable shape of longspan suspension bridge is derived. Calculating process of iteration for cable shape is developed. The calculating results show that the method developed in this paper has a characteristic of clear mechanism concept, high calculating speed and accuracy.

关 键 词：虚拟梁 主缆索形 大跨径 悬索桥 

分 类 号：U448.25[建筑科学—桥梁与隧道工程]