拱桥吊杆破断分析  

The Arch Bridge Suspender Breaking Analysis

作　　者：刘恩德[1] 廖光明[1] 汤国栋[1] 

机构地区：[1]四川大学建筑与环境学院,成都610065

出　　处：《北方交通》2013年第11期61-64,共4页Northern Communications

摘　　要：众所周知,拱桥受力明确,整体性能好,而被广泛使用.但近年来,由于目前使用的吊杆寿命相对于桥梁设计寿命太短,一般为3 ～16年不等,严重的可能造成断索毁桥.业内普遍认为,短吊杆率先破断是造成断索毁桥的主要原因.结合吊杆多种破断原因并利用有限元软件对一下承式拱桥不同位置的吊杆进行了计算分析,结果表明,次短吊杆率先破断的可能性更大,在设计及维护中应特别关注.As everyone know, the arch bridge has a lot of advantages. With the definite load conditions and the good overall performance, the arch bridge is widely used. However, in recent years, because of the short life of the suspender which is usually 3 - 16 years compared with the designed life of the bridges, it will cause the stays broken and the bridges destroyed. There is a popular intraindustrial belief that the broken of the suspenders take the lead in destroying stays and bridges. This paper combined kinds of damage reasons of the suspender and use the finite element software MIDAS to analyse the different positions of a through arch bridge. The results show that the second short suspender has the more possibility of damage and we should pay more attention in the design and maintenance.

关 键 词：吊杆 腐蚀 疲劳 次短吊杆 

分 类 号：U455.7[建筑科学—桥梁与隧道工程]