摘要
为解决千米级斜拉桥的斜拉索无应力长度及索力的计算问题,推导了用悬链线理论计算斜拉索无应力长度的公式,建立了考虑垂度及斜度影响的振动微分方程,在此基础上同国内外频率法索力计算4种实用计算公式进行了比较,结果表明该方法具有高精度和计算方便的特点,应用于苏通大桥索力测试中,能够满足其精度要求。
To improve the calculation of unstressed length and cable force of the stay cables of cable-stayed bridge with span length of 1000-m scale, this paper derives the formulas for calculating the unstressed length of the cables by means of the catenarian theory, establishes the vibration differential equations for the cables that take into account of cable sag and slope effect and also compares the formulas and equations with the other four kinds of the domestic and foreign practical formulas for cable force calculation based on the frequency method. The results demonstrate that the algorithm as given in the paper is of high precision and convenient calculation and can well satisfy the precision requirements for the cable force measurement when once applied to Sutong Bridge.
出处
《桥梁建设》
EI
CSCD
北大核心
2009年第2期58-60,75,共4页
Bridge Construction
基金
国家科技支撑计划项目(2006BAG04B03)
关键词
斜拉桥
斜拉索
无应力长度
索力
计算方法
cable-stayed bridge
stay cable
unstressed length
cable force
algorithm
