FATIGUE LIFE PREDICTION OF RC BEAMS STRENGTHENED WITH PRESTRESSED CFRP UNDER CYCLIC BENDING LOADS  

作　　者：Peiyan Huang Guangwan Liu Xinyan Guo Hao Zhou Xiaohong Zheng 

机构地区：[1]School of Civil Engineering and Transportation,South China University of Technology [2]State Key Laboratory of Subtropical Building Science,South China University of Technology

出　　处：《Acta Mechanica Solida Sinica》2013年第1期46-52,共7页固体力学学报（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Nos. 11132004 and 51078145);the Guangdong Province Natural Science Foundation of China (No. 9251064101000016)

摘　　要：The application of prestressed carbon reinforced polymer （prestressed CFRP） in reinforced concrete （RC） members can improve the mechanical properties of strengthened structures and strengthening efficiency. This paper proposed a semi-empirical prediction fornmla of fatigue lives of the RC beams strengthened with prestressed CFRP under bending loads. The formula is established based on the fatigue life prediction method of RC beams and fatigue experimental data of non-prestressed CFRP reinforced beams done before. Fatigue effect coefficient of the formula was confirmed by the fatigue experiments of the RC beams strengthened with prestressed carbon fiber laminate （prestressed CFL） under cyclic bending loads. Fatigue lives of the strengthened beams predicted using the formula agreed well with the experimental data.The application of prestressed carbon reinforced polymer （prestressed CFRP） in reinforced concrete （RC） members can improve the mechanical properties of strengthened structures and strengthening efficiency. This paper proposed a semi-empirical prediction fornmla of fatigue lives of the RC beams strengthened with prestressed CFRP under bending loads. The formula is established based on the fatigue life prediction method of RC beams and fatigue experimental data of non-prestressed CFRP reinforced beams done before. Fatigue effect coefficient of the formula was confirmed by the fatigue experiments of the RC beams strengthened with prestressed carbon fiber laminate （prestressed CFL） under cyclic bending loads. Fatigue lives of the strengthened beams predicted using the formula agreed well with the experimental data.

关 键 词：prestressed carbon fiber reinforced polymer （prestressed CFRP） carbon fiber laminate （CFL） fatigue effect coefficient life prediction bending load 

分 类 号：TU378.2[建筑科学—结构工程]