【摘要】 通过对采用混合加固方式的砌体砖墙进行加固前后的低周反复试验,研究了玄武岩纤维增强材料(BFRP)加固对砌体砖墙的加固效果,探讨了不同玄武岩纤维用量、加固前是否损伤对砌体砖墙抗震性能的影响,对比分析了不同砌体砖墙加固后的极限承载力、极限位移、滞回及骨架曲线、刚度退化、BFRP应变.结果表明:BFRP加固提高了砌体砖墙的极限承载力和抗震性能;加固后砌体砖墙的破坏形式以弯曲破坏为主,砌体的抗压强度成为砖墙抗剪承载力的主要控制因素;加固后砌体砖墙的承载力和刚度退化明显减慢.更多还原

【Abstract】 This paper deals with the strengthening effect of basalt fiber-reinforced polymer(BFRP) for masonry walls based on the low-cyclic loading tests of masonry walls before and after the strengthening in a mixed configuration.In the investigation,first,the effects of reinforcement amount and pre-damage condition before the strengthening on the seismic performances of masonry walls are discussed.Then,the ultimate bearing capacity,ultimate drift,hysteresis and skeleton curves,stiffness degradation and BFRP strain of different strengthened walls are compared and analyzed.The results show that the strengthening with BFRP helps to improve the ultimate bearing capacity and seismic performances of masonry walls,that the strengthened specimens exhibit a flexural-dominant fai-lure mode,with the compressive strength of masonry being the main controlling factor of the shear capacity of the strengthened walls,and that the degradations of bearing capacity and stiffness of BFRP-strengthened masonry walls are both significantly postponed.更多还原