外挂复合墙板半刚性钢管混凝土框架抗震试验研究

Experimental study on seismic behavior of semi-rigid CFST frames with externally attached composite wall panels

为了研究在地震作用下外挂复合墙板装配式钢结构的抗震性能，本文进行了4榀外挂复合墙板半刚性钢管混凝土框架试件和1榀半刚性钢管混凝土框架试件的水平低周反复荷载试验。研究参数为墙板的混凝土类型、墙连方式、斜撑设置和是否设置墙板。研究了地震作用下墙板与框架的共同工作性能和破坏模式，分析了结构的滞回曲线、骨架曲线、强度和刚度退化规律、耗能能力等。结合现有规范评价了结构的延性。试验结果表明，采用螺栓连接方式外挂复合墙板的半刚性钢管混凝土框架试件具有良好的滞回性能、耗能能力和延性，可以安全可靠地确保复合墙板与组合框架在地震作用下共同工作；位移延性系数μ=2．53～3．81，弹性极位移角θy=（3．33～5．03）[θe]，弹塑性极限位移角θf=（2．35—2．55）[θp]；等效黏滞阻尼系数ξe=0．147—0．182，能量耗散系数E=0．973～1．145；复合墙板破坏主要发生在墙板预埋件附近，整体性能优于传统墙体。研究成果将为我国装配式钢结构设计理论与应用提供科学依据。

To study the seismic behavior of fabricated steel structural frames with externally attached composite wall panels （ECWPs）, four specimens of semi-rigid concrete-filled steel tubular （CFST） frames with ECWPs and one specimen of pure semi-rigid CFST frame subjected to low-cycle reverse loading were tested. The main investigated parameters were the concrete type of wall panel, the connection type between walls, the setup of diagonal bracing and the use of wall panel. The interaction between semi-rigid CFST frames and ECWPs and the corresponding failure modes under earthquake action were investigated. The hysteretic curves, the skeleton curves, the degradation curves of strength and stiffness as well as the energy dissipation capacity were analyzed. Additionally, the structural ductility was also evaluated in terms of the present specifications. The test results showed that the semi-rigid CFST frames with bolt connected ECWPs have good hysteretic behavior, energy dissipation capacity and ductility, so that the collaboration between semi-rigid CFST frames and ECWPs under strong earthquakes can be guaranteed; the ductility coefficient μ =2.53 -3. 81, the elastic ultimate displacement drift θy = （3. 33 - 5. 03 ） [θe ], and the elastic-plastic ultimate displacement drift Of = （2.35 - 2.55 ） [θp] ; the equivalent viscous damping coefficient ξe = 0. 147 - 0. 182, and the energy dissipation coefficient E = 0. 973 ~ 1. 145. The damage of composite wall panel mainly occurred near the embedded parts of the walls, and its overall performance shall be superior to the traditional walls. This study may provide a good reference for the design theory and the application of the fabricated steel structures.