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为研究高性能钢的应用对钢-混凝土组合柱抗震性能的影响,以实际工程构件的缩尺构件抗震性能试验结果为依据,建立Open SEES有限元分析模型。以型钢屈服强度、剪跨比、轴压比为研究参数,进行26个型钢混凝土压弯滞回构件有限元影响因素参数分析。结果表明:普通钢、高强钢SRC柱抗震性能变化趋势较为一致:剪跨比增大时,SRC柱承载力下降,延性性能先提高后降低;轴压比增加时,SRC柱承载力变化较小,延性性能显著降低;随着型钢屈服强度的提高,SRC柱极限承载力提高,但延性性能有下降趋势;为满足构件抗震性能,高强钢SRC柱剪跨比和轴压力限值应低于普通钢SRC柱。
In order to study the influence of high performance steel on the seismic performance of steel-concrete composite columns, Open SEES finite element analysis model is established based on the experimental results of the seismic performance of the scale members of the actual engineering components. Taking the yield strength, the ratio of shear span to the axial compression ratio of the section steel as research parameters, the finite element analysis of the parameters of 26 steel reinforced concrete members with compression-bending deformation was carried out. The results show that the change tendency of the seismic performance of ordinary steel and high strength steel SRC columns is consistent: when the shear span ratio increases, the bearing capacity of SRC columns decreases and the ductility increases firstly and then decreases; and when the axial compression ratio increases, the bearing capacity of SRC columns changes little , The ductility is significantly reduced. With the increase of the yield strength of SRC, the ultimate bearing capacity of SRC columns increases but the ductility decreases. To meet the seismic performance of members, the shear span ratio and axial compression limit of SRC columns of high strength steel should be lower than those of ordinary Steel SRC column.