自锚式悬索桥吊索张拉无应力状态仿真分析方法  

Simulation Analysis Method for TensileStress-free States of Suspender Cables of Self-anchored Suspension Bridges

作　　者：杨继承[1] 卢颖[1] 

机构地区：[1]招商局重庆交通科研设计院有限公司,重庆400067

出　　处：《公路交通技术》2013年第3期100-104,共5页Technology of Highway and Transport

摘　　要：自锚式悬索桥吊索张拉过程中结构几何非线性突出,吊索索力互相影响,体系转换十分复杂,使用常规的正装或倒装法分析难度较大。针对吊索张拉过程中吊索无应力长度仅在吊索张拉时才发生改变,不随外荷载的变化而变化这一客观规律,提出吊索张拉的无应力状态仿真分析方法。以该方法为指导,分析和模拟国内某自锚式悬索桥的吊索张拉过程。实践证明,应用无应力状态方法可准确地对吊索张拉过程进行仿真模拟,且计算结果精度高,方法简便,实施效果良好。During tension of suspender cables of self-anchored suspension bridges geometric nonlinearity of structures is outstanding,suspender cable forces influence each other and system transformation is quite complicated,so analysis with conventional normal or inverted assembly method is difficult.Based on the objective law that the stress free length of suspender cables only changes during tension but does not change with external loads,this paper proposes simulation analysis method for tensile stress free states of suspending cables.At the guide of this method,the paper analyzes and simulates tension process of suspending cables of some domestic self-anchored suspension bridge.The practice proves that the stress-free state method exhibits advantages of accurate simulation for tension process of suspender cables,high precision of calculated results,simple method and good effect of implementation.

关 键 词：自锚式悬索桥 吊索张拉 无应力状态法 仿真分析 

分 类 号：U448.25[建筑科学—桥梁与隧道工程]