矩形钢管混凝土翼缘蜂窝双腹板H型组合短柱轴压性能研究
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中图分类号：TU398文献标识码：A
Abstract： To study the axial compression performance of H-shaped composite short columns with concrete-filled rectangular steel tubular flanges and double cellular webs， 19 full-scale specimens were designed with control parameters including slenderness ratio， confinement effect coefficient， steel yield strength， concrete axial compressive strength， hole-height ratio， and spacing-height ratio. Based on simplified steel constitutive models and constrained concrete nonlinear constitutive models， numerical simulations of 12H -shaped cellular composite columns with concrete-filled rectangular steel tubular flanges were conducted using ABAQUS finite element software to obtain load-displacement curves of specimens. Through comparison with existing experimental data， the applicability and accuracy of the adopted material constitutive models and finite element modeling results were verified. Further parametric analyses were performed to investigate the influence of different parameter variations on the axial bearing capacity of this new type of short columns， thereby revealing the mechanical processes， failure modes， and load-bearing mechanisms. The results indicated that the bearing capacity significantly increased with the confinement effect coefficient， steel yield strength， concrete axial compressive strength， and spacing-height ratio but decreased with the slenderness ratio and hole-height ratio. All specimens exhibited similar failure patterns： outward bulging of flanges with convex failure morphology， and cellular steel webs developing cracks extending bilaterally along the web plane from circular holes. Finally， statistical regression analysis based on the 1stOpt software was conducted to establish a bearing capacity formula for this composite short column type， providing theoretical basis for practical engineering applications.
Key words： honeycomb double-web plate; concrete-filled steel tube; composite columns; mechanism of force; axial compression performance
H 型蜂窝钢柱因其重量轻、施工方便、经济美观而被广泛应用于建筑领域[1]。（剩余11871字）
