RELIABILITY ANALYSIS OF SERVICEABILITY LIMIT STATE FOR FLEXURAL BEHAVIOR OF RC BEAMS STRENGTHENED WITH PRESTRESSED CFRP SHEETS

摘要：

The reliability of serviceability limit state is analyzed for the RC beams strengthened with prestressed CFRP sheets based on nonlinear finite element method and weighted regression response surface method (RSM). The effects of some influencing factors, i.e. initial load, prestressing level, CFRP reinforcement ratio and elastic modulus of CFRP on reliability index are studied. The assessments indicate that the reliability of serviceability limit state can be improved efficiently through strengthening prestressed CFRP. The reliability index decreases with the increase of the initial load. And the reliability index increases with the growth of CFRP reinforcement ratio and elastic modulus of CFRP. It’s recommended that the structures be unloaded as much as possible before strengthening with prestressed CFRP sheets, and the CFRP sheets with higher elastic modulus be used to improve the reliability of serviceability limit state.

关键词： Weighted regression RSM CFRP sheets strengthening serviceability limit tate reliability

作者: Sheng-Hua Jiang Jian-Guo Hou Ying-Ming He

作者单位: School of Civil Engineering,Wuhan University,Wuhan 430072,P. R.China Hubei Key Laboratory of Geotechinics and Structural Safety,Wuhan University,Wuhan 430072,P. R.China

会议类型: 国际会议

会议名称: The 4th Internatiuonal Symposium on Lifetime Engineering of Civil Infrastructure(第四届土木工程结构生命周期国际学术研讨会)

会议地点: 长沙

会议语种:英文

页码: 344-350

在线出版日期: 2009-10-26（万方平台首次上网日期，不代表论文的发表时间）