Comtribution of surface deformations of GFRP rebar to bond to Concrete

Bond of deformed type of GFRP rebar, which has deformations resembles that of ordinary steel rebar, to concrete was investigated experimentally and numerically in this paper. Due to the lower stiffness and strength in shear, surface deformations do not fully works in bond with surrounding concrete. In this paper, the effective surface deformation height of GFRP rebar with ribs was determined based on experimental and numerical results. ??? ????????? ????????? ????????? ????????? ??????????????? ?????? GFRP ???????????? ?????????????????? ??????????????? ????????? ????????? ????????? ???????????????. ????????? ?????? GFRP ???????????? ?????? ??????????????? ?????? ???????????? ??? ????????? ?????? ??????????????? ??? ????????? ????????? ??????????????? ?????? ????????? ???????????? ??????. ????????? ??? ??????????????? ?????????????????? ??????????????? ??????????????? ???????????? ???????????? ????????????????????? ????????? ????????? ????????? ???????????????