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通过3片砌体墙试件在低周期水平往复荷载下的抗震试验,研究喷射玻璃纤维聚合物(GFRP)加固和碳纤维布加固对开门洞无筋砌体墙片抗震性能的影响,从加固墙片的破坏形态、抗震抗剪承载力、滞回特性、刚度退化及耗能能力等方面比较了2种不同加固方案对开门洞砌体墙片的抗震加固效果.试验结果表明:采用喷射玻璃纤维聚合物加固试件的极限承载力、延性系数和耗能系数较未加固试件分别提高了142.8%,33.9%和41.2%,其提升抗剪承载力、改善抗震性能以及保障门洞安全方面也均优于碳纤维布加固方法;喷射玻璃纤维聚合物加固层可以与砌体有效黏结并协同工作,发挥显著的抗震加固效应.
Based on the seismic tests of three masonry walls under low cyclic cyclic loads, the effects of GFRP reinforcement and CFRP reinforcement on the seismic performance of open-door reinforced masonry walls were studied. The failure mode, the anti-seismic and anti-shear bearing capacity, the hysteretic characteristics, the stiffness degradation and the energy dissipation capacity of the two kinds of reinforced schemes are compared. The results show that: The ultimate strength, ductility coefficient and energy dissipation coefficient of the polymer-reinforced specimens increased by 142.8%, 33.9% and 41.2% respectively compared with those of the un-strengthened specimens, which also improved the shear capacity, improved the seismic performance and ensured the safety of the openings Better than the carbon fiber cloth reinforcement method; jet glass fiber polymer reinforcement layer can effectively bond with the masonry and work together to play a significant anti-seismic reinforcement effect.