研究近断层轴向速度脉冲地震效应对钢筋混凝土(RC)柱抗剪性能的影响.以竖向和水平向恒定振动周期的单个RC柱为分析对象,采用台湾集集地震中3组断层距18条速度脉冲型地震动记录,通过非线性动力时程分析方法,研究断层距、竖向与水平加速度谱值比、柱初始轴压比和剪跨比对RC柱抗剪性能的影响规律.结果表明:轴向速度脉冲地震效应对RC柱的抗剪性能有很大影响；抗剪性能系数随反应谱比值增大而减小,中等初始轴压比与断层距,以及剪跨比与近断层距(0～10 km)对柱抗剪性能有交互影响.%The shear-resistant behavior of reinforced concrete (RC) columns subjected to axial velocity pulse-like earthquake action is studied. Single RC columns with the constant vertical and horizontal fundamental period are used to investigate the influence of fault distance, vertical and horizontal acceleration spectral ratio, initial axial load ratio and shear span ratio on shear resistant behavior of RC columns. Eighteen velocity pulse-like earthquake records divided into three fault distance from CHI-CHI earthquake are taken as excitations to execute nonlinear dynamic time history analysis. The results demonstrate that axial velocity pulse-like earthquake action has evident effects on the shear resistant performance of RC columns. Shear-resistant behavior factor decreases with increasing in spectral ratio, and medium initial axial load ratio and fault distance, shear span ratio and near fault distance (0~10 km) have coupling influence on the shear-resistant behavior of RC columns.
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