THE EFFECTS OF TIME-DEPENDENT BEHAVIOR ON CABLE STATE OF EXISTING CABLE-STAYED BRIDGE
In view of the fact that steel cables for cablestayed bridges are susceptible to corrosion damage and tend to get stress relaxation after long-term service,it is essential to be considered those timedependent effects in the analysis of in-service cable behavior. However,most of the recent methods are based on the cable material in perfect state and the effects of time-dependent behavior associated with cable corrosion and stress relaxation are neglected,which makes the application of the current methods difficult in dealing with in-service cable structures. By introducing equivalent strain principle and geometric damage theory,the corrosion mechanism of cable is described. A convergence iterative solution for inclined cable is formulated by solving the boundary problem with the governing differential equation of the in-service cable. With the proposed method,cable corrosion as well as stress relaxation has been taken into consideration,which leads to good precision and provides a new approach to assess the in-service condition of cables in existing cable-stayed bridges,and it could be applied in structural health monitoring of long-span cablestayed bridges.
Cable-stayed bridge Cable Behaviour Assessment Corrosion
Juan Huang Li-Qun Tang
State Key Laboratory of Subtropical Building Science, South China University of Technology,Guangzhou Schoolt of Civil Engineering & Transportation,South China University of Technology,Guangzhou 510641,
国际会议
The Eleventh International Symposium on Structural Engineering(第十一届结构工程国际研讨会)
广州
英文
152-157
2010-12-01（万方平台首次上网日期，不代表论文的发表时间）