方钢管混凝土柱抗震性能试验研究和仿真分析

Experimental Research and Finite Element Analysis on Seismic Behavior of Concrete filled Square Steel Tubular Columns

摘要:

针对长细比等参数对方钢管混凝土柱的抗震性能的影响，设计制作6个方钢管混凝土柱试件，采用足尺比例的试件进行了低周反复荷载作用下的抗震性能试验，并在试验基础上采用有限元软件Abaqus进行了数值模拟分析，取得了较好的一致性.试验结果表明，钢管混凝土具有较好的塑性变形能力.随含钢率增加，钢管混凝土柱的耗能能力提高；随轴压比增大，试件的水平承载能力提高，刚度和耗能能力降低；随长细比增大，试件的水平承载能力和刚度降低，耗能能力下降.

Abstract:

Six full scaled concrete filled square steel tubular (CFSST) columns were tested under low cyclic loading to test their seismic behavior; and then, numerical simulation was made by Abaqus, the finite element analysis results agree well with the experimental results. Results show that CFSST has good plastic deformation capacity. The energy dissipation capacity of CFSST increases with the increasing of sectional steel ratio; the horizontal bearing capacity of CFSST increases with the increasing of axial compression ratio, while the rigidity and energy dissipation capacity reduce instead; and the horizontal bearing capacity, rigidity and energy dissipation capacity of CFSST decrease with the increase of slenderness ratio.