配置HRB500钢筋小跨高比带板开缝连梁的抗震性能试验研究

为了防止联肢剪力墙中小跨高比连梁发生低延性剪切破坏,在单连梁中部设置一条通缝,形成开缝连梁改善其抗震性能。试验完成了3个小跨高比带板开缝连梁的低周反复加载,通过与其他配筋形式连梁对比,分析了开缝连梁的破坏形态、滞回特征、承载力退化、刚度退化、延性、耗能等一系列抗震性能。利用软件ABAQUS对试件滞回曲线的骨架曲线进行模拟,并将模拟结果和试验结果相对比。结果表明,小跨高比开缝连梁具有良好的承载能力及变形能力,施工较为方便且经济,能有效防止小跨高比连梁延性较差的剪切破坏,具有较好的抗震性能,可在实际工程中推广。

Experimental analysis on seismic behavior of small-span-to-depth-ratio slotted coupling beams with slab and HRB500 bar

Small-span-to-depth-ratio coupling beams of shear wall can be formed with a crack in the middle to prevent from shear failure and improve the seismic performance. Three coupling beams with same small-span-to-depth-ratio were tested under cyclic loading. Comparing the results of slotted coupling beams with other coupling beams of different forms of reinforcement, we analyzed the seismic behavior of the slotted coupling beam, including failure pattern, hysteresis loop, strength degradation, stiffness degradation, ductility and energy dissipation. We simulated skeleton curve of specimens'' hysteresis curve by using ABAQUS and compared the simulation result mith the experiment result. The results show that slotted coupling beams with small-span-to-depth-ratio have good performance of bearing capacity and deformation.They can be constructed conveniently and economically. Besides, with the good seismic performance, small-span-to-depth-ratio coupling beams could prevent from shear failure effectively and be applied well in practical engineering.