内置钢板深梁剪力墙抗震性能试验研究

Experimental study on seismic behavior of shear wall with concealed steel plate deep beams

内置钢板深梁剪力墙是由钢管混凝土柱、柱间钢板深梁、混凝土墙体及其连接构件组成。对5个1/5缩尺的该组合剪力墙模型进行了低周反复荷载试验。试验分两阶段进行,第一阶段试验研究位移角小于1/50试件的抗震性能,第二阶段试验研究第一阶段损伤试件修复后的抗震性能,修复采用剪力墙边框钢管间两侧贴焊薄钢板的方法。分析了各试件修复前后的破坏特征、滞回特性、承载力、刚度退化、位移延性、耗能性能。结果表明:内置钢板深梁剪力墙的钢管混凝土柱、钢板深梁、混凝土墙体及连接构件相互作用,协同受力,具有良好的抗震性能;变形特征具有阶段性,在混凝土和部件连接界面损伤前与整体剪力墙变形接近,在连接界面损伤滑移后与带竖缝剪力墙接近。

A shear wall with concealed steel plate deep beams contains CFST columns, steel plate deep beams, RC walls and connecting components. Low cyclic loading tests on seismic behavior of five 1/5 scaled composite shear wall specimens were carried out. The loading was divided into two stages Loading stage one focused on the seismic behavior of specimens before the drift of 1/50, while stage two focused on the seismic behavior of specimens repaired after the first stage, and the repair was carried out by welding thin steel plates between the steel tubular columns. Failure characteristics, hysteretic characteristics, load-bearing capacity, stiffness degradation, ductility, and the energy dissipation of specimens before and after repair were studied. Study shows that： the CFST columns, steel plate deep beams, RC walls and the corresponding connecting components can collaborate closely and exhibit a good seismic behavior; the deformation behavior differs at different stages, in which the deformation is close to that of entire shear walls before the concrete wall cracking, and close to shear wall with vertical slit after the slippage between the steel tube and concrete wall.