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为研究钢管混凝土叠合边框内藏钢桁架剪力墙的抗震性能,制作了2个普通钢管混凝土叠合边框剪力墙试件和2个钢管混凝土叠合边框内藏钢桁架剪力墙试件。对试件进行了模拟地震振动台试验研究,对比了这2种剪力墙的动力特性、加速度时程反应和位移时程反应。利用有限元软件ABAQUS分别建立微观模型和宏观模型对不同设计参数的试件进行了弹塑性时程分析。研究结果表明,内藏钢桁架能够明显提高钢管混凝土叠合边框剪力墙的延性和抗震耗能能力;在较大的地面加速度峰值下,钢桁架减小试件地震位移的作用发挥得更明显;钢管混凝土叠合边框内部钢管壁厚的增大有利于提高剪力墙的承载力和安全储备。
In order to study the seismic performance of the steel truss shear wall with steel tube concrete superimposed border, two ordinary specimens of steel-concrete composite shear wall and two specimens of steel-truss composite shear wall . Simulated seismic shaking table tests were carried out on the specimens, and the dynamic characteristics, acceleration time-history responses and displacement time-history responses of the two kinds of shear walls were compared. The finite element software ABAQUS was used to build the microscopic model and the macroscopic model respectively to analyze the elastic-plastic time-history of the specimens with different design parameters. The results show that the built-in steel truss can obviously improve the ductility and seismic energy dissipation capacity of CFST superimposed shear wall. The effect of steel truss on reducing the seismic displacement of specimen is more obvious under the large ground acceleration peak ; The increase of the wall thickness of the steel pipe inside the concrete-filled steel tubular composite frame will be beneficial to increase the bearing capacity and safety reserve of the shear wall.