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为了研究以平钢板为面板的冷弯薄壁型钢组合墙的抗震性能,在同时承受水平荷载和重力荷载的情况下对6个冷弯薄壁型钢组合墙试件进行4个水平单调加载试验和2个低周反复加载试验。研究的目的是观察各试件的主要破坏形态,分析组合墙体的抗剪强度、初始刚度、延性、滞回曲线特性等,分析重力荷载对组合墙体的破坏形式和抗剪强度的影响,同时采用OpenSEES对组合墙体进行了数值模拟,验证模拟的精确度。试验结果表明:组合墙的抗剪强度并不因重力荷载而有所降低;施加重力荷载后,墙体试件更容易出现框架构件的屈曲破坏,而非螺钉连接处的破坏;组合墙抗剪强度和延性随框架构件厚度增加而显著提高;采用有限元软件OpenSEES模拟组合墙体,模拟结果与试验结果对比表明模拟具有较高的精确度。
In order to study the seismic behavior of cold-formed thin-walled steel composite wall with flat steel as the panel, four horizontal monotonic loading tests were carried out on six cold-formed thin-walled steel composite wall specimens with both horizontal and gravitational loads 2 low cycle repeated loading test. The purpose of the study is to observe the main failure modes of the specimens, analyze the shear strength, initial stiffness, ductility and hysteresis curve of the composite wall, analyze the influence of gravity load on the failure form and shear strength of the composite wall, At the same time, OpenSEES is used to simulate the combined wall and verify the simulation accuracy. The test results show that the shear strength of the composite wall does not decrease due to the gravity load. The buckling damage of the frame member is more likely to occur on the wall specimen than the screw joint after the gravity load is applied. The strength and ductility increase significantly with the increase of the thickness of the frame member. The finite element software OpenSEES is used to simulate the combined wall. The comparison between simulation results and test results shows that the simulation has higher accuracy.