体外预应力索索力计算的新方法  

A NEW METHOD OF ANALYSIS FOR THE FORCE OF THE EXTERNAL PRESTRESSED CABLES

作　　者：李传习 李德慧 贺玲凤[2] 

机构地区：[1]长沙理工大学桥梁与结构工程学院 [2]华南理工大学交通学院

出　　处：《土木工程学报》2005年第6期54-58,共5页China Civil Engineering Journal

基　　金：广州市建设科技发展基金资助项目(200006);湖南省交通科技基金资助项目

摘　　要：根据滑动索段的无应力索长总和不变,考虑体外索与转向块相对滑动,考虑滑动摩擦系数与静摩擦系数不相等,提出了更准确的体外预应力索索力的计算方法,解决了现有方法计算体外索索力偏差可能较大的问题。算例给出了本文方法和现有主要方法的体外索索力计算结果及其偏差。According to the fact that the total length of slipping stress-free cables remain constant this paper,presents a more precise method to analyze the force of external cables.Moreover,this method also considers several vital factors,including the relative slippage between the external cables and the deviators, and the difference between the static friction coefficients and the sliding.As a result, the proposed method is more advantageous than other methods in that the solutions are more precise.Examples are provided to show the results from this and other methods.

关 键 词：体外预应力梁 索力 转向块 滑动摩擦 静摩擦 

分 类 号：TU378[建筑科学—结构工程]