装配式开孔加劲钢板组合剪力墙抗震性能研究

Study on seismic behavior of stiffened perforated prefabricated steel-concrete composite shear wall

为解决钢板组合剪力墙与建筑中的非结构部分连接问题,使钢板组合剪力墙在工程应用中更具有普适性,对一种采用内凹冲压件焊接对拉螺杆为连接件的开孔加劲双钢板组合剪力墙抗震性能进行研究。对9个开孔加劲钢板组合剪力墙进行拟静力试验,分析开孔布置形式、设置暗柱、轴压比等参数对构件承载力、延性、耗能等方面的影响。试验结果表明:开孔加劲钢板组合剪力墙均表现出压弯破坏模式,滞回曲线较为饱满,具有良好的延性和耗能能力;不同的开孔布置形式对墙体的承载力影响较小、对墙体延性影响较大;设置暗柱能够有效提高构件的承载力和延性;当轴压比由0.3增大到0.4,开孔加劲钢板组合剪力墙延性降低,但提高轴压比对其承载力影响不大。在试验研究基础上,对退化三线型恢复力模型进行改进,建立开孔加劲钢板组合剪力墙的骨架曲线和恢复力模型,由此模型得到的骨架曲线、滞回曲线和试验的吻合较好。

In order to solve the connection problem between steel plate composite shear walls and non structural parts of buildings,and to make steel plate composite shear walls more universal in engineering applications,seismic performance of a new stiffened opening steel-concrete composite shear wall formed by welding split screws with concave stamping parts was investigated.Quasi-static tests on nine specimens were carried out,considering the influences of opening layout,set concealed columns,axial compression ratio and other parameters on the bearing capacity,ductility,energy dissipation and other properties of the member.The test results show that:all the stiffened perforated steel-concrete composite shear walls show compression bending failure mode,full hysteretic curves,good ductility and high energy dissipation capacity.The different layout of openings has little influence on the bearing capacity of the members and has a great influence on the ductility of the members.Setting concealed columns can effectively improve the bearing capacity and ductility of the members.When the axial compression ratio increases from 0.3 to 0.4,the ductility of the stiffened perforated steel-concrete composite shear walls decreases,but it has little effect on the bearing capacity of the walls.Based on the experimental research,the skeleton curve and the restoring force model of the stiffened perforated double steel-concrete composite shear wall were established,and the degenerated trilinear restoring force model had been optimized.The skeleton curve and hysteretic curve obtained from the model are in good agreement with the test results.The model can provide a basis for the practical engineering application of stiffened perforated steel-concrete composite shear walls.