方钢管再生混凝土柱抗震性能试验研究

Experimental research on seismic behavior of square steel tubular columns filled with recycled aggregate concrete

文章在定常轴力和水平低周反复荷载作用下,对3根采用足尺比例的方钢管再生混凝土柱进行了拟静力试验,研究了再生混凝土取代率、含钢率等参数的变化对构件抗震性能的影响。试验结果表明:方钢管再生混凝土柱有较好的塑性变形能力和抗震性能;随着含钢率的上升,方钢管再生混凝土柱的水平承载力显著上升,延性和耗能能力也随之提高;随着再生混凝土取代率的增大,方钢管再生混凝土柱的水平承载力小幅度下降,延性和耗能能力略有降低。因此方钢管再生混凝土柱具有良好的抗震性能。

Pseudo-static test on three full-scale square steel tubular columns filled with recycled aggregate concrete under constant axial load and cyclic lateral load was done,and the influence of both replacement ratio of recycled aggregate concrete and steel ratio on the seismic behavior of the specimens was investigated.The results show that square steel tubular columns filled with recycled aggregate concrete have good plastic deformation capacity and seismic behavior.With the increase of steel ratio,the ultimate load increases considerably,along with the increase of ductility and energy dissipation capacity.While the ultimate load,ductility and energy dissipation capacity reduce slightly with the increase of replacement ratio of recycled aggregate concrete.The experimental results show that square steel tubular columns filled with recycled aggregate concrete have good seismic performance.