对一榀单跨两层半刚接框架-十字加劲钢板剪力墙结构进行水平反复荷载作用下的抗震试验研究,系统分析结构破坏模式和耗能机理,研究节点刚度与加劲墙体的相互影响效果,得到了承载力,延性,刚度和耗能能力等指标。试验结果表明:该种结构具有良好的延性和耗能性能,安全储备高;节点刚度退化小,内填钢板的设置缓解了节点区自身的延性要求,半钢框架和墙板协同工作良好;加劲肋的设置改善了钢板的实际受力,提高墙体的承载力及刚度,减轻了滞回曲线的“捏缩”现象,减小钢板噪音及震颤。结构破坏模式为加劲肋屈曲,内填钢板以小区格局部屈曲为主,伴随相关屈曲;框架柱脚及梁柱半刚性连接部位形成塑性铰;试件面内呈弯曲破坏模式,研究为该种结构体系的工程应用和理论分析提供依据。
Based on the experiment of a one-bay, two-story semi-rigid composite steel frame model with cross-stiffened steel plate shear wall under lateral cyclic loads, the interaction between the joint stiffness and cross-stiffened steel plate shear wall, the failure mode and energy dissipation mechanics of the structure were analyzed with regard to the load- carrying capacity, ductility, stiffness and energy dissipation capacity. The results showed that the specimen exhibited excellent ductility, energy dissipation capacity and safety margin. The stiffness degradation of the joints was not serious, and the requirement for ductility was lowered by the infill panels and the collaboration between the frame and the steel plate shear wall. The stiffeners improved the work condition of the steel panels, increased the stiffness and load-carrying capacity of the panels, and reduced the shrinkage of the hysteresis loop and the noise and tremor of the panels. The failure mode of the structure might be induced by buckling of the stiffeners, local buckling and interactive buckling of the infill panels, plastic hinges were formed at the bottom semi-rigid connection of the column, and the in-plane failure of the specimen was bending failure.