方钢管混凝土框架内置两侧开洞薄钢板剪力墙的抗震性能研究

分别对单跨2层1/3比例的方钢管混凝土框架内置两侧开洞薄钢板剪力墙和未开洞薄钢板剪力墙进行了低周反复荷载试验，对比分析了方钢管混凝土框架内置薄钢板剪力墙的受力机理和破坏机制。采用有限元软件ABAQUS对试验试件进行了非线性数值分析，并将数值分析结果与试验结果进行对比，研究其抗震性能。结果表明：方钢管混凝土框架内置两侧开洞和未开洞薄钢板剪力墙均具有较高的承载力、良好的耗能能力和刚度，破坏机制符合“弱板强框架”的抗震理念，基本达到双重抗震设防目标。利用有限元足尺模型研究了钢板剪力墙开洞率、轴压比对结构抗震性能的影响，结果表明：开洞率的增大使结构承载力和耗能能力减小，但对刚度退化影响较小；轴压比对结构承载力、滞回耗能和刚度退化等影响很小。

SEISMIC STUDY OF CONCRETE-FILLED SQUARE STEEL TUBULAR FRAME-THIN STEEL PLATE SHEAR WALLS WITH TWO-SIDE OPENINGS

Two one-bay two-story 1/3 scale concrete-filled square steel tubular (CFST) frame-thin steel plate shear walls (SPSWs) with two-side openings and no openings in the infill panels were studied to investigate the seismic behavior under low cyclic loading. The mechanical behavior and failure mechanism were investigated on the CFST frame-thin SPSWs. The nonlinear analytical analysis was conducted using the finite element package ABAQUS. The numerical results were compared with the experimental results to study the seismic behavior of the CFST frame-thin SPSWs. The results showed that the CFST frame-thin SPSWs with two-side openings and no openings in the infill panels both had high bearing capacity, energy dissipation capacity and stiffness. Ideal failure mechanism, namely weak plate strong frame, and the double aseismic fortification aim were achieved. The effects of opening ratio and axial compression ratio on the structural aseismic behavior were investigated by the finite element prototype models. The results showed that the bearing capacity and energy dissipation capacity decreased with the increase in the opening ratio, and the increase in the opening ratio had little effect on the degradation of stiffness. Axial compression ratio had little effect on the bearing capacity, energy dissipation and stiffness.