Experimental research and numerical simulation of RC beams strengthened with bonded steel plates  

作　　者：LEI Dong CHEN GuangYuan CHEN YuQuan REN QingWen 

机构地区：[1]State Key Laboratory of Hydrology-Water Rexources and Hydraulic Engineering,Hohai University,Nanjing 210098,China [2]College of Mechanics and Materials,Hohai University,Nanjing 210098,China

出　　处：《Science China(Technological Sciences)》2012年第12期3270-3277,共8页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 11132003, 11002048, 10972072);the Special Fund of State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering at Hohai University (Grant Nos. 2011585912, 2009585912)

摘　　要：It is a common method to strengthen the damaged RC structures with bonded steel plates. At present the ultimate bearing ca- pacity of RC structures strengthened with bonded steel plates is calculated mostly using the theory based on the test. Four beams, including one reference beam, two strengthened concrete beams in primary force and secondary force respectively, and one strengthened concrete beam which was not anchored enough, were tested under four-point bending (4PB) in order to get the data of strain of longitudinal bars, bonded bottom steel plate in tension and deflection of beams in the middle span. The experimental program was supported by a three-dimensioned finite analysis using ABAQUS. At the end of experiments and finite analysis, it is concluded that the investing strengthening technique can significantly improve the load-carrying capacity and the phenomenon of stress concentration at the end of interface, as well as the damage at interface, can be well simulated with cohesive element provided by ABAQUS.

关 键 词：RC beams  strengthened with bonded steel plates secondary force  finite element analysis  damage of interface 

分 类 号：TU375.1[建筑科学—结构工程] TU375