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分别对单跨两层1/3比例的方钢管混凝土框架-两边连接薄钢板剪力墙和四边连接薄钢板剪力墙进行了低周反复荷载试验,对比分析了其抗震性能和破坏形态,研究了钢板剪力墙边界约束对结构抗震性能的影响.提出了两侧开半椭圆形洞口的钢板剪力墙形式.采用有限元软件ABAQUS对方钢管混凝土框架-两边连接薄钢板剪力墙、四边连接薄钢板剪力墙及两侧开洞薄钢板剪力墙进行了非线性数值分析,比较了薄钢板剪力墙拉力场对框架柱的附加弯矩,明确了洞口尺寸对结构性能的影响.结果表明,方钢管混凝土框架-两边连接及四边连接薄钢板剪力墙均具有良好的延性和耗能性能;与四边连接薄钢板剪力墙相比,钢板剪力墙两侧开半椭圆形洞口可显著降低对框架柱的附加弯矩,其抗震性能明显优于两边连接薄钢板剪力墙;提出了合理的洞口尺寸比例.
The low-cycle cyclic loading tests were carried out on both sides of a single-span two-story square concrete filled steel tube-steel frame with two sides connected to the thin steel plate shear wall and the four sides connected to the thin steel plate shear wall. The seismic performance and the failure mode were compared and analyzed. The influence of the boundary constraint of the steel plate shear wall on the seismic performance of the structure is proposed. The form of steel plate shear wall with semi-elliptical openings on both sides is proposed. The finite element software ABAQUS is used to connect the concrete-filled steel tube frame The nonlinear numerical analysis of the thin steel plate shear wall and the thin-walled shearing wall with openings on both sides is carried out. The additional bending moments of the thin-plate shear wall on the frame column are compared and the influence of the hole size on the structure performance is clarified. It shows that the square steel tube concrete frame-both sides connection and the four sides connection of the thin steel plate shear wall have good ductility and energy dissipation performance. Compared with the four sides connection of the thin steel plate shear wall, the semi-elliptical holes on both sides of the steel plate shear wall can be opened The additional bending moment on the frame column is significantly reduced, the seismic performance of the frame column is obviously better than that of the shear wall connected with the thin steel plate on both sides, and a reasonable hole size ratio is proposed.