沙漠砂混凝土框架柱低周反复荷载抗震性能试验研究

Experimental study of the desert sand concrete frame columns under low cyclic loading

基于沙漠砂混凝土柱与普通砂混凝土柱2个试件的低周反复加载试验,对其抗震性能进行了研究,并对比分析了2个试件的骨架曲线、滞回曲线、耗能能力、延性性能和刚度退化等抗震指标。试验结果表明:试件主要发生压弯破坏;随着循环次数和位移幅值的增加,构件的刚度、强度不断退化,耗能能力以及极限变形能力不断降低;与普通砂混凝土柱相比,沙漠砂混凝土柱滞回曲线较丰满,滞回耗能总量相对较大。研究结果为揭示沙漠砂混凝土柱的抗震机理提供试验支持。

The seismic behavior of desert sand concrete column and ordinary concrete column was investigated by the experiments of2 columns subjected toa constant axial load and cyclic lateral loads.And the skeleton curve, hysteretic curve, energy dissipation capacity,ductility and stiffness degradation of each specimen were studied.The results showed that compression-bending failure was the mainpatterns of the2 specimens.The stiffness and strength of specimens degenerated while energy dissipation capacity and ultimate deformationcapacity reduced with the increase of cycles and displacement.Compared with common sand concrete column, the hysteresis curve ofdesert sand concrete column was chubby, and had good energy-dissipation capacity.The research will provide experimental support forrevealing aseismic mechanism of desert sand concrete column.