某在役铆接钢桁梁桥关键构件疲劳性能研究  

作　　者：袁佩[1,2] 张焱焜 耿波 尚军年[1,2] 

机构地区：[1]招商局重庆交通科研设计院有限公司,重庆400067 [2]桥梁工程安全与韧性全国重点实验室,重庆400067

出　　处：《科技创新与应用》2024年第22期58-61,共4页Technology Innovation and Application

基　　金：重庆市建设科技计划项目(城科字2022第1-14号);重庆市自然科学基金(CSTB2022NSCQ-MSX1658)。

摘　　要：精准评估现役钢桥的疲劳寿命对于桥梁结构的安全运营至关重要。该文以某在役铆接钢桁梁桥为研究对象,在对桥梁结构进行计算分析明确各构件的受力特点的基础上,针对原桥典型构件以及关键节点开展系列疲劳性能研究。数值计算结果表明,城B荷载作用下原桥典型构件以及关键节点均具有良好抗疲劳性能,疲劳寿命循环次数均大于200万次。Accurate evaluation of the fatigue life of steel bridges in service is very important for the safe operation of bridge structures.In this paper,a riveted steel truss bridge in service is taken as the research object.Based on the calculation and analysis of the bridge structure and the mechanical characteristics of each member,a series of fatigue performance studies are carried out for the typical members and key joints of the original bridge.The numerical results show that the typical members and key joints of the original bridge under city B load have good anti-fatigue performance,and the number of fatigue life cycles is more than 2 million.

关 键 词：钢桁梁桥 在役钢桥 疲劳性能 寿命评估 应力修正 

分 类 号：U4466[建筑科学—桥梁与隧道工程]