Niechanisms and evaluation of cable corrosion in long-span bridges

被引：0
|
作者：
Juan, H. [1 ]
Wang, R. H. [1 ]
机构：
[1] S China Univ Technol, Coll Traff & Commun, Guangzhou, Guangdong, Peoples R China
来源：
ISISS '2007: PROCEEDINGS OF THE INNOVATION AND SUSTAINABILITY OF STRUCTURES, VOLS 1 AND 2 | 2008年
关键词：
cable-supported bridge; cable corrosion; equi valent-strain principle; corrosion mechanisms; stress relaxation; safety assessment;
D O I：
暂无
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
In view of the fact that cables for suspension and cable-stayed bridges are susceptible to corrosion and tend to become stress relaxation after long-term service, it is essential to take those damage effects into consideration in structural analysis to ensure the safety of the existing bridges. By introducing Lemaitre's equivalent-strain principle and geometrical damage theory, the corrosion mechanisms of cable are described. A cable-damage model for safety assessment in long-span cable-supported bridges is presented. With the approach, cable corrosion as well as stress relaxation effects has been taken into account in the structural analysis. The results lead to good precision and validate a new approach to assess the safety of cables in existing long-span cable-stayed bridges, and it also could be applied in structural health monitoring of cable-supported bridges.
引用
收藏
页码：873 / 880
页数：8
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