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为考察利用钢板剪力墙耗能的自复位结构的抗震性能,通过理论分析和有限元模拟,研究钢板剪力墙厚度和钢绞线的预拉力对结构的影响。对结构受力性能进行分析,得到结构的理论复位刚度值。采用有限元对模型试件在循环荷载作用下的抗震性能进行模拟,通过对所得滞回曲线、结构耗能性能、骨架曲线、结构水平承载力、抗侧刚度及延性的分析,了解各个影响因素对结构的作用并与理论计算进行对比。结果表明:随着钢板剪力墙厚度的增加,结构在相同循环荷载作用下,每次循环的耗能量增加,承载力显著增大,延性更优,但是结构的复位能力逐渐变差;随着钢绞线的预拉力增加,每次循环的耗能量略微减小,结构最大层间位移增加,致使极限承载力增大,并且使结构的复位能力增强。
In order to investigate the seismic performance of the self-resetting structure using the energy dissipation of the steel plate shear wall, the influence of the thickness of the steel plate shear wall and the prestressing force of the steel strand on the structure is studied through theoretical analysis and finite element simulation. The mechanical behavior of the structure is analyzed, and the theoretical reset stiffness of the structure is obtained. The finite element method is used to simulate the seismic behavior of the model specimen under cyclic loading. Through analysis of the obtained hysteresis curve, structural energy dissipation, skeleton curve, structural horizontal bearing capacity, lateral stiffness and ductility, The effect on the structure is compared with the theoretical calculation. The results show that with the increase of the thickness of the shear wall, the energy consumption of each cycle increases with the same cyclic loading, the bearing capacity increases significantly and the ductility is better, but the ability of the structure to reset gradually deteriorates. The prestressing force of the strand increases, the energy consumption per cycle decreases slightly, and the maximum displacement of the structure increases. As a result, the ultimate bearing capacity increases and the ability of the structure to be reset is enhanced.