SUPPRESSION OF INTERMEDIATE CRACK DEBONDING IN FRP-PLATED RC BEAMS USING INCLINED FRP U-JACKETING
Intermediate crack debonding(i.e.,IC debonding)commonly controls the failure of a reinforced concrete(RC)beam strengthened with a fibre-reinforced polymer(FRP)plate bonded to its tension face.Such a failure mode of FRP plated RC beams often occurs with the maximum strain of the FRP soffit plate being about 20%-40%of its tensile rupture strain,and make it become an impediment to fully utilize the high tensile strength of the expensive FRP material.The postponement or suppression of IC debonding failure using appropriate anchorage measures has therefore attracted increasing research attention.While a number of options(e.g.,fibre anchors)is possible to delay/suppress this failure mode,inclined FRP U-jacketing at the end of the FRP soffit plate is among the most effective and easily-installed ones.This paper presents an ongoing experimental programme to investigate the effect of inclined FRP U-jacket on IC debonding.Results of three test beams are presented herein,indicating that inclined FRP U-jacketing as an end anchorage is capable of suppressing IC debonding,and significantly improves both the load-carrying capacity and ductility of the beam.
FRP flexural strengthening RC beam debonding anchorage
X.T.Tang L.J.Li B.Fu F.Liu W.X.Feng
School of Civil and Transportation Engineering,Guangdong University of Technology,Guangzhou,China
国际会议
新加坡
英文
1-6
2017-07-19（万方平台首次上网日期，不代表论文的发表时间）