不同参数对方钢管混凝土柱滞回耗能的影响

Finite element analysis of concrete filled square steel tubular under simulate seismic force

方钢管混凝土柱(CFST,Concrete Filled Square Steel Tubular)抗震性能优越,影响其抗震性能的参数有:长细比、轴压比、幅厚比,且这种影响是相互耦合的.通过正交比较分析的方法,利用有限元软件ABAQUS对19根CFST进行数值模拟分析,研究了不同参数对CFST滞回耗能的影响.总体上CFST在低周反复水平荷载作用下滞回曲线饱满,在柱屈服以后承载力并没有明显的下降.CFST具有良好的耗能能力,抗震性能优越.幅厚比对CFST滞回耗能影响最大,轴压比次之,长细比在一定范围内有一定的影响.

CFST（Concrete Filled Square Steel Tubular） column is excellent in seismic performance,the parameters affecting the seismic performance are：the slenderness ratio,the axial compression ratio and D/t,and the effect is coupled with each other.Using the finite element software ABAQUS on 19 CFST columns numerical simulations,this paper analyzes the seismic performance of CFST column by the orthogonal comparative method.CFST columns to cyclic horizontal loads have full hysteresis loop,the carrying capacity of the CFST columns is not significantly reduced when being yielded.CFST column proves to be good in seismic performance.D/t makes the greatest impact on energy consumption of CFST column than axial compression ratio,and slenderness ratio will be troubled to some extend.