装配式复式钢管混凝土框架-梁端螺栓连接钢筋混凝土剪力墙抗震性能试验研究

为促进复式钢管混凝土框架剪力墙结构的建筑工业化，提出一种可完全装配式建造的复式钢管混凝土框架-梁端螺栓连接钢筋混凝土剪力墙结构体系，体系中梁-柱节点、柱-柱拼接节点和框架与剪力墙连接均采用全螺栓装配式连接。为研究该体系的抗震性能，开展了三榀1∶2缩尺模型的低周往复荷载试验，研究了各模型的破坏特征、滞回性能、延性、抗侧刚度和承载力退化。结果表明：梁端螺栓连接钢筋混凝土剪力墙(BRW)破坏形态与钢筋混凝土梁“剪压”型破坏特征相似；BRW先于框架发生破坏，可作为复式钢管混凝土框架的第一道抗震防线，框架则为第二道防线；BRW与框架的装配式连接可靠，在整个加载过程中可有效提高框架的承载力和抗侧刚度，可保证BRW与框架在地震作用下的协同工作能力，进而保障BRW的性能得以充分发挥。

Experimental study on seismic performance of assembly concrete-filled double-skin steel tube frame with beam-bolt-connected RC shear walls

To promote the building industrialization of concrete-filled double-skin steel tube (CFDST) frame shear wall structures, a fully-assembled constructed CFDST frame with beam-bolt-connected reinforced concrete (RC) shear wall system was proposed, only high-strength bolts were used in the beam-to-column joints, column-to-column joints and frame-to-wall connections. To investigate the seismic performance of the novel system, low cyclic loading tests on three 1/2-scaled models were conducted. The failure characteristics, hysteretic performance, ductility, lateral stiffness and strength degradation of these specimens were studied. The results show that the failure mode of beam only connected RC shear wall (BRW) is similar with shear-compression failure characteristic of RC beam. The BRW fails prior to the CFDST frame, thus the BRW could be acted as the first defense line of CFDST structures, and the frame is the second one. The connection between BRW and CFDST frame is reliable, the BRW could enhance the ultimate strength and lateral stiffness of the CFDST frame effectively in the whole loading process, thus the interoperability of them could be ensured under earthquake loads, and then the performance of the BRW could be fully demonstrated.