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通过8个型钢混凝土剪力墙的低周反复加载试验,重点研究轴压比、配钢率、配箍特征值对剪力墙滞回性能的影响。根据试验结果,通过理论分析,提出了以开裂点、屈服点、峰值点和极限点为特征点并考虑刚度退化的四线型荷载-位移恢复力模型,给出了各特征点参数以及各阶段刚度计算公式。分析结果表明,用该文恢复力模型所得计算滞回曲线与试验滞回曲线符合较好。该文的恢复力模型既反映了主要因素的影响,又便于进行结构非线性动力分析,可供型钢混凝土剪力墙非线性地震反应分析和工程设计应用。
Through the low-cycle repeated loading test of eight steel reinforced concrete shear walls, the influence of axial compression ratio, steel ratio and bifurcation characteristic value on the hysteretic behavior of the shear wall are mainly studied. According to the experimental results, a four-line load-displacement restoring force model is proposed, which is characterized by cracking point, yield point, peak point and limit point, and considering the stiffness degradation. The parameters of each characteristic point, Stiffness calculation formula. The analysis results show that the calculated hysteresis curve obtained from the restoring force model in this paper is in good agreement with the experimental hysteresis curve. The restoring force model of this paper not only reflects the influence of main factors, but also facilitates the nonlinear dynamic analysis of structures, which can be used for nonlinear seismic response analysis and engineering design of steel reinforced concrete shear walls.