FRP筋与ECC粘结性能试验研究

Experimental Study on Bond Properties between FRP Bar and ECC

纤维增强水泥基复合材料(ECC)是一种新型高性能建筑材料,具有假应变硬化和超高的韧性等特性,将其用于工程结构可大幅提升结构的承载力、延性和耗能性能。而FRP筋与ECC材料之间的粘结性能是影响FRP增强ECC结构力学性能的关键因素。文章通过FRP-ECC拉拔试验研究了FRP筋与ECC的粘结破坏机理和破坏形态,分析了FRP筋的类型、直径、锚固长度和FRP筋的外形等因素对FRP筋与ECC之间的粘结性能的影响。

Fiber Reinforced Cementitious Composites(ECC) is a class of advanced composite material with pseudo strain hardening behavior and super high toughness. Application of ECC can improve load bearing capacity, ductility and energy dissipation ability of structures. The bond behavior between FRP bars and ECC is one of the key factors affecting mechanical behavior of ECC members or structures. In this paper, pullout tests were conducted to study the bond behavior between FRP bars and ECC and clarify the failure mode of the specimens. The influence of various parameters, such as the embedment length, FRP type, FRP diameter and FRP shape, on the bond behavior between FRP and ECC has been comprehensively studied.