悬索桥主缆成桥线形的迭代算法  

Iteration Algorithm for Main Cable Shape of Suspension Bridge

作　　者：潘韬[1] 杨德灿[2] 

机构地区：[1]同济大学土木工程防灾国家重点实验室,上海200092 [2]武汉理工大学交通学院,武汉430063

出　　处：《交通科技》2008年第5期3-5,共3页Transportation Science & Technology

摘　　要：大跨度悬索桥主缆成桥线形是进行结构分析、计算和指导施工的关键控制因素,采用有限位移理论可较全面地考虑大位移引起的悬索桥几何非线性。利用通用有限元程序,建立全桥平面有限元模型,实现了悬索桥施工过程的模拟计算,并且使用悬索桥施工理想初态及成桥状态的迭代算法来确定主缆成桥线形。结果表明,悬索桥主缆的线形是介于抛物线与悬链线之间的索多边形。Main cable shape of long-span suspension bridges in completion state is the key controlling factor of structure design, calculation and guiding construction. Geometric non-linearity of suspension bridge caused by the large displacement can be considered fully by using finite displacement theory. The general FEM program was used to establish the whole bridge plan model with the stimulation analysis during the construction process. The iteration algorithm for the construction ideal initial state and completion state was adopted to determine the main cable shape. The results shows main cable shape is funicular polygon between eatenary and parabola.

关 键 词：悬索桥 主缆线形 几何非线性 迭代算法 

分 类 号：U448.25[建筑科学—桥梁与隧道工程] U448.27[交通运输工程—道路与铁道工程]