CAJ | 학술논문

通过3片1／2缩尺比例的钢筋混凝土－砖组合开洞墙体试验，研究了严重震损低强度组合墙体采用玄武岩纤维加固后的抗震性能；通过模拟地震的预损伤试验，以及不加固、纤维直接加固和预损伤后修复加固试件的低周往复荷载试验，对比分析了不同试件的试验现象、开裂荷载、极限承载力和位移、滞回曲线及耗能能力、承载力及刚度退化、变形恢复能力和玄武岩纤维应变等。结果表明：加固后组合墙体表现出剪－弯破坏的失效模式，优于以剪切破坏为主的未加固试件；纤维加固对组合墙体初始开裂荷载无提高作用，但对其抗震性能的提高程度明显，震损试件加固后的抗震性能得到恢复并且超过未加固试件。
통과3편1／2축척비례적강근혼응토－전조합개동장체시험，연구료엄중진손저강도조합장체채용현무암섬유가고후적항진성능；통과모의지진적예손상시험，이급불가고、섬유직접가고화예손상후수복가고시건적저주왕복하재시험，대비분석료불동시건적시험현상、개렬하재、겁한승재력화위이、체회곡선급모능능력、승재력급강도퇴화、변형회복능력화현무암섬유응변등。결과표명：가고후조합장체표현출전－만파배적실효모식，우우이전절파배위주적미가고시건；섬유가고대조합장체초시개렬하재무제고작용，단대기항진성능적제고정도명현，진손시건가고후적항진성능득도회복병차초과미가고시건。
An experiment on three 1∶2 scaled reinforced concrete-brick composite walls with opening was conducted to evaluate the seismic performance of severely-damaged low-strength composite walls strengthened by fiber-rein-forced polymer ( FRP) .By a pre-damage experiment simulating earthquake and the low-cycle reversed loading ex-periments with no strengthening , strengthening by using fibers and rehabilitating the specimen after pre-damage , the specimens were compared in terms of experimental phenomena , cracking load , ultimate bearing load and dis-placement , hysteretic curves , energy dissipation capacity , bearing capacity , stiffness degradation , deformation re-covery capacity and FRP strain .The results show that (1) FRP-strengthened walls exhibit the shear-flexural failure mode, which is superior to the shear-dominant failure mode of the specimen without strengthening; ( 2 ) FRP strengthening can improve the seismic performance of the composite walls significantly , but not for the initial crack-ing load;and (3) the seismic performance of the damaged composite masonry walls strengthened with BFRP can recover or even exceed that of the specimen without strengthening .