Experimental study on bond behavior between steel-GFRP composite bars and concrete
Steel-FRP composite bars(SFCBs)is a new type of reinforcement with fiber wrapped steel bars.Because of its good durability and ductility,it can be used to replace steel bars as reinforcement of concrete structures.The bond behavior between glass fiber type SFCBs and concrete was study experimentally,the mechanical mechanism of bond-slip at the interface of SFCBs-concrete was analyzed,the influence of concrete strength on the bond behavior between SFCBs and concrete was discussed,and the bond-slip model between SFCBs and concrete was established.The results showed that the failure mode of SFCBs-concrete interface is the shear of the rib and concrete at the interlocks,which is similar to FRP bars.The bond-slip relationship curves of SFCBs-concrete interface is divided into four stages,and the re-interlock behavior of residual stage can be described by Zheng & Xue model with modified shape coefficient.The rebars deformability and the concrete strength will significantly affect the bonding performance.
bond slipsteel-GFRP composite barsconcreteFRPbond strength
万方数据
维普
