桥梁横向分布系数计算方法对比分析研究  

Comparison Analyses on Methods for Calculating Transverse Distribution Coefficient

作　　者：陈勇军[1,2] 张会远[3] 

机构地区：[1]中南大学土木工程学院,湖南长沙410083 [2]湖南省高速公路管理局,湖南长沙410016 [3]河南城建学院,河南平顶山467036

出　　处：《公路工程》2015年第3期148-151,166,共5页Highway Engineering

基　　金：湖南省交通科技项目(201235)

摘　　要：横向分布系数是桥梁结构计算中的关键之处,其简化计算方法有很多,在各种计算方法的简化计算过程中,难免产生一些误差。以一座20 m标准跨径、11.5 m桥面净空简支T梁桥为例,分别采用偏心压力法、修正刚度的偏心压力法、铰接梁法和刚接梁法、"G-M法"5种简化计算方法进行计算,并分别与结构分析软件MIDAS建模分析结果进行比较分析。结果表明,5种简化计算方法中G-M法误差最小,平均每片梁的误差仅为1.5%,其余误差均超过5%,由此推荐20 m标准跨径、11.5 m桥面净空简支T梁桥的荷载横向分布系数采用G-M法计算较为准确。Transverse distribution coefficient is the key to the calculation of the bridge construction. It has a lot of simplified calculation methods. There must be some errors in the process of simplified calculation. This paper takes a simply supported T beam bridge of 20 m standard-span and 11. 5 m wide for example. Respectively takes five methods of ＂G- M＂; the eccentricity pressure method; the modified eccentricity pressure method; the hinge linking beams method and the rigid linking beams method to calculating. Then,respectively compare the results of five methods with the result of MIDAS. Results showed that G- M＇s error is the smallest of the five simplified calculation methods＇. The average error of ＂G-M＂is only 1. 5% but the average errors of the others are more than 5%. So,＂G- M＂is the most accurate method that calculates transverse distribution coefficient of 20 m standard-span and 11. 5 m wide simply supported T beam bridge.

关 键 词：桥梁结构 T梁桥 横向分布系数 计算 

分 类 号：U448.217[建筑科学—桥梁与隧道工程]