装配式复式钢管混凝土框架—梁端连接#br# 钢板剪力墙抗震性能试验研究

提出装配式复式钢管混凝土框架-梁端连接钢板剪力墙新型结构体系，包含装配式梁柱连接、装配式柱柱拼接和装配式框架-剪力墙连接技术方案，可实现结构体系的全螺栓装配式连接。为研究所提装配式体系的抗震性能，开展3榀1:2缩尺模型拟静力试验，得到各试件的破坏模式、滞回曲线、位移延性等性能参数。发现3个模型均表现出良好抗震性能，最大层间位移角均超过4%，位移延性系数均超过4。框架-梁端连接钢板剪力墙(BSW)的破坏过程为：BSW屈曲后形成明显的“拉力带”，随后BSW在与框架的连接处发生撕裂，最后框架在梁柱节点和柱底区域形成塑性铰。试验结果表明：BSW先于框架发生破坏，可为框架提供第一道抗震防线，框架则为第二道；BSW可有效提高框架结构的承载力、刚度和延性，且提高的幅度与BSW的个数呈近似线性关系；所提BSW与框架的装配式连接可靠，可保证BSW与框架在整个加载过程中的协同工作能力，进而促使BSW的性能得以充分发挥。系列试验结果为所提新型装配式复式钢管混凝土框架 梁端连接钢板剪力墙结构体系的抗震设计提供依据。

Experimental investigation on seismic performance of assembly #br# CFDST frame with beam-connected steel plate shear walls

This paper proposes a novel assembly concrete-filled double-skin steel tube (CFDST) frame with beam-connected steel plate shear wall (BSW) system，including beam-to-column，column-to-column and frame-to-wall assembly connections，which are used for all bolt assembly construction of the proposed novel system. To investigate the seismic behavior of the proposed system，three 1:2-scaled models were tested under cyclic loads. The seismic performance of the test specimens are obtained，including failure modes，hysteretic curves，displacement ductility，and etc. The specimens exhibit good seismic performance，in which the maximum inter-story drift of these specimens exceeds 4%，and the displacement-based ductility coefficient exceeds 4. The failure process of the CFDST frame-BSW specimens includes “tension field” formed after buckling of BSW，tearing of the BSW nearby the frame-to-wall connections，and the forming of the plastic hinges at the beam-to-column connections and column bases. The test results show that the BSW fails prior to the CFDST frame，the BSW and the frame can be used as the first defense line and the second line，respectively. The BSW can enhance the strength，stiffness and ductility of the CFDST frame，and the relationship between the enhancements and the numbers of the BSW is approximately linear. The proposed frame-to-wall connection is reliable to ensure the interoperability of the BSWs and the CFDST frame，so as to promote fully-use of the performance of the BSWs. The test results can provide reference for the seismic design of CFDST frame-BSW system.