圆钢管全再生粗骨料混凝土柱抗震性能试验研究

Experimental Study on Seismic Behavior of All Recycled Aggregate Concrete-filled Circular Steel Tube Columns

为研究圆钢管全再生粗骨料混凝土柱的抗震性能,进行了圆钢管全再生粗骨料混凝土柱在竖向荷载和水平反复荷载下的拟静力试验,试验参数为含钢率和轴压比。通过各试件的破坏形态和破坏过程,分析了含钢率和轴压比对滞回曲线、刚度退化、耗能性能等抗震性能的影响。结果表明,钢管全再生粗骨料混凝土柱和普通圆钢管混凝土柱的破坏过程、破坏模式基本相同。含钢率越大,试件的水平承载力、延性越好;随着轴压比的增大,试件的水平承载力、耗能性能有增大的趋势,但试件的延性逐渐降低,可知圆钢管全再生粗骨料混凝土柱具有良好的抗震性能。

In order to study the seismic performance of full recycled concrete-filled steel tube columns,the quasi-static test is carried out for circular steel tube full regenerated coarse aggregate concrete column under constant vertical load and horizontal repeated load.The test parameters are steel content and axial compression ratio.Through the experiment,the entire failure modes and compress process of all specimens are observed,and the influences of hysteretic curves,stiffness degradation and energy dissipation performance on the seismic performance are also analyzed.The results show that the failure mode of the whole regenerated coarse aggregate concrete column and the circular concrete filled steel tube column is basically the same.With the increase of axial compression ratio,the horizontal bearing capacity and energy dissipation performance of the specimens are improved,but the ductility of the specimens decreases gradually.Therefore,the circular steel tube full regenerated coarse aggregate concrete column has good seismic performance.