方钢管混凝土框架-中间开洞薄钢板剪力墙抗侧承载力研究

Study on lateral resistance capacity of concrete-filled square steel tubular frame-thin steel plate shear walls with middle opening

通过对1榀1/3比例的单跨2层方钢管混凝土框架-中间开洞薄钢板剪力墙的低周反复荷载试验,得到了其荷载-位移滞回曲线和骨架曲线,分析了其破坏特征及延性。利用有限元软件ABAQUS对其进行了非线性数值分析。基于试验结果和数值模拟,结合理论分析,提出了适用于方钢管混凝土框架-中间开洞薄钢板剪力墙的抗侧承载力计算公式。结果表明:方钢管混凝土框架-中间开洞薄钢板剪力墙的滞回曲线呈较为饱满的梭形,具有较好的延性、耗能能力和抗震性能;洞口周边设置加劲肋减小了钢板剪力墙的高厚比,改善了钢板剪力墙的受力性能;公式计算结果与试验及有限元分析结果吻合较好。

The low cyclic loading experiment was conducted on one 1 /3 scaled one-bay and two-story concrete-filled square steel tubular frame-thin steel plate shear walls( SPSWs) with middle openings. The load-displacement hysteretic loops and skeleton curves were obtained. The failure characteristic and ductility were studied. The nonlinear numerical analysis was conducted using the ABAQUS software. Based on the experimental and numerical results,the simplified formulae of the lateral force resistant capacity was proposed. The results show that the concrete-filled square steel tubular frame-thin SPSWs with middle openings have good ductility,energy dissipation capacity and seismic behavior. The stiffeners around the openings decrease the height-to-thickness ratio of infill plates. The mechanical behavior of steel plate shear wall is improved. The formula results agree well with the experimental and numerical results.