不同加载角度下Z形截面钢筋混凝土柱抗震性能研究

Study on seismic behavior of Z-shaped RC columns under different load angles

通过ANSYS对低周反复水平荷载作用下Z形截面钢筋混凝土柱受力性能进行数值模拟分析,研究其在不同加载角度θ（0°~165°）下的抗剪承载力、延性和耗能能力等受力性能。结果表明,加载角度的变化对低周反复荷载下Z形柱的受力性能影响较大。当θ=60°时,其水平承载力最小,水平极限位移最大,延性系数最小。故建议在实际工程设计中,除了对关于两个工程主轴方向的承载力、刚度与位移限值进行验算外,还应验算当加载角度θ=60°时的情况。

According to numerical simulation analysis by ANSYS of behavior of Z-shaped RC columns subjected to low-cyclic horizontal load,the shear capacity,ductility and energy-consumption capacity were studied under different load angles,which arranged from 0° to 165°.The results show that changes of load angle θ has a great impact on behavior of Z-shaped RC columns.The horizontal carrying capacity and the ductility factor reach the minimum as θ=60°,and at the same time the horizontal displacement reaches the maximum.Proposal： besides working on the two principal axes,the carrying capacity,stiffness and limited displacement about θ=60° should be calculated in the practical design.