碳纤维增强复材布加固前后T型竖缝耗能装配式剪力墙抗震性能试验研究

EXPERIMENTAL RESEARCH ON SEISMIC PERFORMANCE OF T-SHAPED PREFABRICATED SHEAR WALLS WITH ENERGY-DISSIPATING VERTICAL JOINTS BEFORE AND AFTER STRENGTHENING WITH CFRP SHEETS

为研究竖缝耗能的T型装配式剪力墙接缝及整体构件的抗震性能,对2个T型竖缝耗能剪力墙试件进行拟静力试验,直至加载到试件破坏,破坏后的试件采用碳纤维增强复材(CFRP)布加固处理后进行二次加载。剪力墙的主要变化参数为轴压比(0.1、0.3),对比分析加固前后剪力墙的承载能力、滞回性能、耗能性能及刚度退化等。研究结果表明:T型竖缝耗能剪力墙具有良好的工作性能,且CFRP加固结构能快速恢复建筑使用功能。加固前后位移延性系数均接近或大于3,试件具有良好的变形能力。阻尼器具有良好的连接和工作性能,试件整体表现出较好的耗能能力。

In order to study the seismic performance of joints and integral components of T-shaped prefabricated shear walls with enengy-dissipating vertical joints,quasi-static tests were carried out on two T-shaped shear wall specimens with enengy-dissipating vertical joints until the specimens were damaged. The damaged specimens were reinforced with carbon fiber sheets and subjected to secondary loading. The main change parameter of the shear wall was the axial compression ratio( 0. 1,0. 3). The bearing capacity,hysteretic performance,energy dissipation performance and stiffness degradation of the shear walls before and after reinforcement were compared and analyzed. The research results showed that: T-shaped shear wall with enengy-dissipating vertical joint showed good working performance,and the CFRP reinforced structure could quickly restore the building’s function. The displacement ductility coefficients before and after reinforcement were close to or higher than 3,which reflected the good deformability of the specimen.The damper had good connection and working performance,and the specimen as a whole showed good enengydissipating capacity.