摘要
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.
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 .
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2015年第7期84-91,共8页
Journal of South China University of Technology(Natural Science Edition)
基金
云南省教育厅科学研究基金资助项目(2014Z008)
云南大学校级科研项目(2014CG012)~~
关键词
纤维增强材料
钢筋混凝土-砖组合开洞墙体
加固
剪-弯破坏
剪切破坏
抗震性能
fiber-reinforced polymer
RC-brick composite wall with opening
strengthening
shear-flexural dam-age
shear-dominant damage
seismic performance
