半刚性连接钢框架-非加劲钢板剪力墙结构性能研究

半刚性连接钢框架-非加劲钢板剪力墙结构弥补了传统抗弯钢框架侧向刚度不足的缺点,为采用更加经济的半刚性节点提供了可能。为研究不同梁柱连接刚度对双体系结构抗震性能的影响,完成了3个单跨两层不同梁柱连接刚度试件的水平低周往复加载试验研究,系统分析了三者的整体性能和破坏模态,拟从承载力、刚度、延性、耗能、整体性能和节点性能六个方面对双体系的节点刚度与墙体的匹配效果进行评价。结果表明:在半刚性框架内设置钢板墙能较大程度提高结构的极限承载力与侧向刚度;结构具有理想的屈服顺序,内填板在加载初期非常有效。屈服区域延伸至整个墙体时,附加荷载将基本上由边缘构件承担,试件破坏主要由内填板的屈服和框架柱的弯扭失稳控制;节点刚度退化小,且内填板的设置缓解了节点区自身的延性要求,梁柱连接形式对试件的抗侧刚度和整体强度的影响不大,降低连接刚度有利于提高试件延性和耗能能力。

Study on the behavior of semi-rigid connection steel frames with unstiffened steel plate shear wall structure

Steel plate shear walls increase the lateral stiffness of steel frames,provides the opportunity to use semi rigid connections which is more economical.In order to study the seismic behavior of the dual system,a two-storey one bay steel frame with varying beam-to-column connections and steel plate shear wall structure specimens was tested under cyclic load,general behavior and failure mode of the structure were obtained,and the strength,stiffness,ductility and energy dissipation,general behavior and joint response of the model were analyzed.The interactive effect of the joint stiffness and steel plate of the structure were analyzed.The analytical results show that the steel plate shear wall could improve the lateral bearing capacity,lateral stiffness and high safety factor of the semi-rigid composite steel frame.The dual systems should have desirable sequences of yielding.The infill plates in the structure are very effective in the initial stages of loading,and when yield zones spread throughout the wall,additional applied loads are essentially carried by the frame members.Joint connection stiffness impact on the overall strength and lateral stiffness can be ignored,and reduction of rotational stiffness of the connections would improve performance of the whole structure.