带现浇楼板钢框架-剪力墙结构的拟动力试验研究

Pseudo-dynamic test study on steel frame-shear wall structure with cast-in-place floor

为研究楼板平面内刚度对整体结构抗震性能的影响,对一个3层2跨的钢框架-剪力墙结构进行了等效单自由度拟动力试验研究。着重分析了该钢框架-剪力墙结构的破坏机制、耗能性能及变形恢复能力,从而掌握该钢框架-剪力墙结构的抗震性能。结果表明,现浇混凝土楼板刚性可以保证结构的空间整体性和水平力的有效传递,该组合结构体系具有良好的抗震性能。最后通过对刚度比系数R的分析,得到该组合结构体系能保证剪力的有效传递,特别是在强震作用下,能够使不同抗侧力构件协同工作,剪力墙承担80%以上的地震剪力。

To study the influence from in-plane stiffness of the floor on seismic performance of the whole structure, pseudo-dynamic test of the equivalent single degree of freedom on three-story double-span steel frame-shear wall structure with cast-in-place concrete floor was conducted. The failure mechanism, energy dissipation behavior and deformation recovery capacity under pseudo dynamic load was emphatically analyzed to grasp seismic behavior of the steel frame-shear wall structure. The results show that the rigidity of the floor with cast-in-place floor can ensure the spatial integrity of the structure and the effective transmission of the horizontal force. The composite structure has a good seismic performance. Finally, we concluded that the composite structure can ensure effective transmis- sion of shear force and make different anti-lateral force members work together with shear wall and undertake more than 80% of seismic shear force especially under severe earthquake through the analysis of the stiffness ratio coefficient R.