FRP Rod 종류별 묻힘길이에 따른 부착응력에 대한 연구

Abstract

This study is to examine bond strength of beam reinforced with GFRP rebar under 4-point bending test by adopting BRITISH STANDARD that is used to investigate effect of concrete in bonding test. The test variables were made to have bonding length of 15times(15db), 17.5times(17.5db) and 20times(20db) of the nominal diameter of GFRP, CFRP rebar and were done to analyze the relationship between the bonding strength and the slip. In the result of the test, a pattern of the concrete splitting failure appeared in all specimens and the bond strength of CFRP rebar(20db) is shown in the lowest value.