简支变连续梁法加固多跨T梁桥效应分析

重庆交通大学学报（自然科学版） ›› 2006, Vol. 25 ›› Issue (2): 4-7.

简支变连续梁法加固多跨T梁桥效应分析

靳欣华，姚启明，张澎涛

上海市市政工程研究院，上海20003 l

收稿日期:2005-03-15 修回日期:2005-04-20 出版日期:2006-04-15 发布日期:2015-05-18
作者简介:靳欣华(1977—)，男，河南唐河人，工程师，工学博士，主要从事桥梁检测、评估及加固技术研究

Reinforcing effect analysis of converting simply-support into continuous for multi-span T shape free beam bridge

JIN Xin-hua，YAO Qi-ming，ZHANG Peng-tao

Institute of Shanghai Municipal Engineering Research，Shanghai 200031，China

Received:2005-03-15 Revised:2005-04-20 Online:2006-04-15 Published:2015-05-18

摘要/Abstract

摘要： 多跨简支T梁变连续加固措施是多跨简支T梁桥加固改造、提高承载能力的行之有效的方法．但实践中发现该方法存在着一定的问题．以跨径为l6．76m+16．76m的两跨简支T梁为例，通过理论分析计算表明，该方法在提高跨中抗弯承载能力的同时，却降低了中间支点处梁的抗剪承载能力．建议在采用此方法加固多跨简支T梁的同时应对中间支点梁的抗剪能力进行加固．

关键词: 旧桥加固, 多跨简支T梁桥：简支变连续加固方法

Abstract: Converting simply-support into continuous is the effectual reinforcement measure to improve ultimate bearing capacity of multi-span T shape flee beam bridge But some problem was also found in practice．Take example for reinforcing T shape free beam bridge with double spans(16.76m+16.76m)by using the measure，the result of theoretic analysis and calculation indicates that the bend bearing capacity in the middle of span Was improved，as the same time，the sheer bearing capacity of the continuous end of beam Was reduced.The advice Was advan ced that reinforcing the sheer bearing capacity of the continuous end of beam when the measure Was adopted to improve bend bearing capacity of multi-span T shape simply-support beam bridge．

Key words: reinforcing of old bridge, multi-span T shape free beam bridge, reinforcement measure of converting simply-support into continuous

中图分类号:

U445.6

靳欣华，姚启明，张澎涛. 简支变连续梁法加固多跨T梁桥效应分析[J]. 重庆交通大学学报（自然科学版）, 2006, 25(2): 4-7.

JIN Xin-hua，YAO Qi-ming，ZHANG Peng-tao. Reinforcing effect analysis of converting simply-support into continuous for multi-span T shape free beam bridge[J]. Journal of Chongqing Jiaotong University(Natural Science), 2006, 25(2): 4-7.