|
Title |
Bond Strength of Near Surface-Mounted FRP Plate in Concrete Corresponding to Space and Bond Length
|
|
DOI |
https://doi.org/10.4334/JKCI.2013.25.1.037 |
|
Keywords |
표면매입보강 ; FRP 판 ; 부착길이 ; 보강 간격 ; 계면파괴 near surface-mounted retrofit ; FRP plate ; bond length ; space of FRPs ; interface failure |
|
Abstract |
Recently, experimental and analytical researches have been performed in order to find interface failure between FRP plate and concrete in near surface-mounted (NSM) retrofit using FRP plate. As a result, it was found that the bond strength between concrete and NSM FRP plate had a close relationship with shape of FRP, concrete compressive strength and bond length. However, research need is increasing about another factors such as suitable space of FRP plate and group effect. In this study, therefore, a bond test was performed with aforementioned factors and compared with a previous equation to verify its suitability for predicting bond strength of NSM FRP plate. From the test, it was found that the bond strength increased according to the increase of space of NSM FRP plates even if its bond length was same. The splitting failure of concrete governed when space of FRPs was too narrow and it changed to FRP's tensile failure with increase of the space. From the evaluation of test specimens using previous equation, it was found that the bond strength could be predicted properly with consideration of group effect.
|