低周反复荷载作用下钢筋混凝土异形柱受力性能试验研究

通过对13根钢筋混凝土异形柱的低周反复加载试验,分析了不同肢长、轴压比、配箍率及纵筋不同配置形式等因素对异形柱承载力及抗震性能的影响。结果分析表明,试件的承载力随着轴压比的增大而提高,但延性降低明显;异形柱腹板的增大提高了试件的承载力,但变形能力及延性有所降低;增大配箍率及端部加强纵筋对试件的延性有一定的改善。

Experimental study on behavior of special-shaped RC columns under low cyclic load

Based on the experiment of thirteen reinforced concrete special-shaped columns under cyclic load,the factors which affect bearing capacity and seismic behavior,such as different length of limbs,axial load ratio,stirrup ratio and the arrangement of longitudinal bars,etc.,are analyzed.Tests results show that the bearing capacity of the columns increases,but the ductility decreases with an increase of axial load ratio.When the web gets longer,its bearing capacity increases,while its deformability and ductility decrease.Besides,increase of stirrup ratio and longitudinal bars in the end of web also have effect on the ductility of the columns.