EFFECT OF TRANSVERSE BRACES ON THE BEHAVIOR OF STEEL PLATE SHEAR WALL FRAME STRUCTURE
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摘要: 为研究设有横向撑杆的十字形加劲约束构件对钢板剪力墙结构墙板变形的抑制作用，框架梁柱连接衬板的加强效应，以及横向撑杆对框架柱"沙漏"现象的减缓效应，完成了两榀1：3比例单跨3层钢板剪力墙的拟静力试验，探究了两种结构的破坏顺序和破坏模式，对比分析了两者的滞回性能，墙板、框架柱及梁柱节点的变形和受力情况。研究结果表明：设有横向撑杆的十字加劲约束钢板墙较非加劲钢板剪力墙，具有更好的耗能能力，横向撑杆的设置显著改善了钢板和框架的受力性能，提高了墙体的承载力和刚度，有效减少了滞回曲线的"捏缩"现象，降低薄板墙的噪音及震颤。较非加劲钢板剪力墙，设有横向撑杆的十字加劲约束钢板墙结构框架柱的挠曲值变形量降低20%，梁柱节点的转动需求量略小，但节点应力要求大幅度降低。Abstract: It presents an investigation on the behavior of a steel plate shear wall frame structure strengthened by transverse braces. The horizontal parts of the crossed restrainers are connected to the boundary columns to act as the transverse braces in the structural system. Two 1/3 scale, one-bay, three-story frames with steel plate shear walls were tested under quasi-static cyclic loadings. The failure modes and hysteretic behavior of the specimens were compared and discussed. Deformation and stress concentration at the infilled steel plates, the boundary columns and the beam-to-column connections were also analyzed. The test results demonstrated that the steel plate shear wall frame with transverse braces exhibited better performance in terms of load carrying capacity, energy dissipation and stiffness. The incorporation of transverse braces in the steel plate shear wall frame could significantly reduce stress concentration at the beam-to-column connections and was effective to restrain the deformation of the boundary columns and the steel plate shear walls. Compared to the conventional steel plate shear wall frame, the pull-in deformation of the boundary columns was reduced by 20% with the addition of transverse braces. In addition, the noise and vibration of the steel plate shear walls in the frame under lateral loads were also improved with the contribution of transverse braces.
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