装配式L形截面夹芯组合剪力墙节点抗震性能试验

Seismic performance test of joints of assembled L-shaped section sandwich combined shear wall

为研究装配式L形截面夹芯组合剪力墙节点的整体工作性能,设计了由环形水平钢筋连接试件及水平贯通钢筋连接试件共两类。详细考察了试件的工作状态、破坏机理、滞回性能、刚度退化及耗能等变化规律,并对其延性性能进行了评价。结果表明:试件发生了典型的弯剪破坏,主要集中在腹板脚部混凝土被拉裂或压碎、钢筋拉长或压弯。通过对比分析发现,环形水平钢筋连接试件的开裂、屈服、峰值荷载及相应的变形均得到大幅度的提高;通过对耗能性能进行评估,得出的结论一致等。说明环形钢筋可以有效增强腹板与暗柱、翼缘与暗柱之间的连接,有助于综合提高试件的抗震能力。

To study the overall working performance of assembled L-shaped cross-section sandwich composite shear wall joints,two types of specimens were designed,including annular horizontal reinforcement connection specimens and horizontal through reinforcement connection specimens.The working state,damage mechanism,hysteresis performance,stiffness degradation and energy dissipation of the specimens were investigated in detail,and the ductility of the specimen was evaluated.The results show that the specimens have typical bending-shear failure,mainly concentrated on the web foot concrete was cracked or crushed,the reinforcement was elongated or bent.Through comparative analysis found that the cracking,yielding,peak load and corresponding deformation of the ring-shaped horizontal reinforcement connection specimens were substantially improved;Through the evaluation of energy dissipation performance,consistent conclusions were drawn,etc.It indicates that the ring-shaped reinforcement can effectively enhance the connection between web and concealed column,flange and concealed column,which improves the seismic capacity of the specimens comprehensively.