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高层钢-混凝土混合结构体系是近年来在高层和超高层结构中应用较为广泛的一种抗侧力体系,在高层钢框架-核心筒混合结构抗震设计中,常常将钢梁-混凝土墙连接节点设计成理想的刚接或铰接。综合刚接节点和铰接节点的优缺点,提出了能满足滑模施工工艺的全栓接新型半刚性节点,并对3个混合结构T形墙梁半刚接耗能节点试件进行了低周往复荷载试验。试验研究表明:该节点可方便地在实际施工过程中实现;节点具有较好的延性性能和一定的耗能能力;影响节点的初始刚度和承载力的主要因素是顶、底角钢的刚度和强度,腹板角钢对其影响较小。顶、底角钢是半刚性节点的关键部件且可拆换,能够满足“中震可修”的抗震性能目标。随着顶、底角钢厚度的增加,节点的屈服弯矩、屈服转角、极限弯矩和极限转角都有明显的增长。
High-rise steel-concrete hybrid structural system is a kind of anti-lateral force system widely used in high-rise and super-tall structures in recent years. In the seismic design of high-rise steel frame-core tube hybrid structure, the connection between steel beam and concrete wall Designed to be ideally just connected or hinged. Based on the merits and demerits of just-connected joints and hinged joints, a new type of full-bolted new-type semi-rigid joints which can satisfy the slip-form construction process is proposed. The low-cycle reciprocating load of semi-rigid joints of three T- test. The experimental results show that this node can be easily implemented in the actual construction process. The node has good ductility and energy dissipation capacity. The main factors affecting the initial stiffness and bearing capacity of the node are the stiffness and strength of the top and bottom corners , Web angle of its less affected. The top and bottom corner steels are the key components of the semi-rigid joints and are interchangeable, which can meet the seismic performance target of “moderate earthquake can be repaired.” With the increase of the thickness of the top and bottom corners, the yield bending moment, yielding corner, ultimate bending moment and limit turning angle of the joints both increase obviously.