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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 load-displacement hysteresis curve and the skeleton curve are obtained through the low-cycle repeated load test of 1 榀 1/3 ratio single-span concrete-filled steel tube-reinforced concrete (CFST) Features and ductility. The finite element software ABAQUS was used to do nonlinear numerical analysis. Based on the test results and numerical simulation, combined with the theoretical analysis, the formula for calculating the anti-side bearing capacity of the thin-walled steel plate-shear wall with square steel tube concrete frame-middle opening is proposed. The results show that the hysteretic curve of the thin-walled steel plate-reinforced concrete (CFST) -structured hollow steel sheet-reinforced concrete shear walls has a full fusiform shape with good ductility, energy dissipation and seismic performance. The stiffeners around the openings reduce the plate shear The ratio of wall thickness to wall thickness improves the stress performance of the steel plate shear wall. The calculated results are in good agreement with the experimental results and the finite element analysis.