FAILURE MODE AND SHEAR CAPACITY OF RC BEAMS WITH EXTERNALLY BONDED FRP SHEETS
This paper concerned with shear mechanism of externally bonded FRP reinforcement for RC beams. The shear capacity of FRP-strengthened RC beams has a close relation with the failure mode. There are four types in usual failure mode of the beams reinforced with FRP sheets as follows: failure following debonding of FRP sheet; rupture of FRP sheet and compression failure of the concrete in the compression zone occurring almost simultaneously; compressive failure of concrete in the compression zone; rupture of FRP sheet before debonding occurs. The shear failure mechanism of FPR sheet in different failure modes is obviously distinctive, and therefore the shear capacity is greatly different. The separate treatment of different failure is essential before make shear capacity prediction. After analyzing 42 available test data with selective five famous shear strength models, it is showed that all shear strength models are more accurate in FRP sheet rupture than debonding mode. The research of shear strength model in FRP debonding mode deserves special attention.
FRP Concrete beams Shear capacity Failure mode Shear strength model
Dan Li Zhi-Shen Wu
School of Civil Engineering and Architecture, Wuhan Polytechnic University, Wuhan 430023, P.R. China Department of Urban and Civil Engineering, Ibaraki University, Japan
国际会议
广州
英文
1302-1308
2009-11-28（万方平台首次上网日期，不代表论文的发表时间）