框架-摇摆墙结构体系中连接节点试验研究

Experimental study of connections of frame-rocking wall system

框架-摇摆墙结构是一种新型的抗震结构体系,摇摆墙与框架相连的节点构造是实现该结构体系的关键技术之一。为了推广框架-摇摆墙结构的工程应用,针对框架-摇摆墙结构的特殊性能要求设计了连接节点,并进行了试验研究。试验采用带隔震支座的钢框架模拟具有大变形能力的框架,设计制作了2片钢筋混凝土摇摆墙,利用该连接节点将框架和摇摆墙连接起来,形成框架-摇摆墙结构。通过不同加载模式的拟静力试验,验证了连接节点实现摇摆墙转动能力的可行性,并采用变形集中系数DCF评价了采用该连接节点摇摆墙对框架-摇摆墙结构的控制效果。试验结果表明:该连接节点可使摇摆墙在面内和面外均具备0.04 rad的转动能力;摇摆墙可使结构层间位移角趋于一致,对避免结构层间变形集中有良好的控制作用。

Frame-rocking wall system is a novel seismic force resisting structural system,and the connections are critical to realize the system.To promote the engineering application of frame-rocking wall system,new connections were proposed,and a series of tests were conducted to investigate the performance of the connections.In the tests,a steel frame equipped with rubber isolators,which has large deformation capacity,was used to simulate the frame.Two concrete rocking walls were fabricated.A new type of connection was adopted to assemble the frame and concrete rocking walls.The tests mainly focused on the rotation capacity of the rocking wall with the novel connection and the associated controlling effects.Interstory concentration factor（DCF） was adopted to evaluate the controlling effects of rocking wall with the connections.The results suggest that the connections ensure the rocking wall of a rotation capacity of 0.04rad both in-plane and out-of-plane.The rocking wall with the novel connections effectively controls the interstory drift concentration and endows the structure with a uniform deformation mode when subjected to different loading patterns.