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首页> 外文期刊>Arabian Journal for Science and Engineering. Section A, Sciences >Numerical Analysis and Axial Bearing Capacity of Composite Columns with Recycled Aggregate Concrete‑Filled Steel Tube and Profile Steel
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Numerical Analysis and Axial Bearing Capacity of Composite Columns with Recycled Aggregate Concrete‑Filled Steel Tube and Profile Steel

机译：再生骨料钢管与型钢组合柱的数值分析与轴向承载力

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摘要

The axial compressive behavior of composite columns with recycled aggregate concrete (RAC)-filled steel tube and profilesteel was examined through numerical investigations. The constitutive models of the RAC material, profile steel, and steeltube were assigned to respective elements in the columns. The experimental results were used to verify the finite element(FE) model. Results indicated that the FE model accurately predicts the deformation, stress, and load–strain curves of thecolumns. Then, the effects of RAC strength, steel tube strength, profile steel strength, profile steel ratio, and diameter-tothicknessratio on the axial compressive behavior of the columns were evaluated through a parametric study. The increasein RAC strength, steel tube strength, and profile steel strength significantly affected the axial bearing capacities of the columns.However, deformation ability and ductility decreased gradually as the RAC strength and steel strength increased. Theincrease in the diameter-to-thickness ratio had a negative effect on the axial bearing capacities of the long columns. Basedon the experimental research, FE analysis, and ultimate analysis method, a formula for the axial bearing capacity of thecomposite columns was proposed. The validity of the proposed formula was verified through the comparison of the results.The research conclusions can provide a reference for the design of composite columns.
机译：通过数值研究检查了再生骨料钢管和型钢复合柱的轴向压缩性能。将RAC材料，型钢和钢管的本构模型分配给列中的各个元素。实验结果用于验证有限元模型。结果表明，有限元模型可以准确预测柱的变形，应力和荷载应变曲线。然后，通过参数研究评估了RAC强度，钢管强度，型钢强度，型钢比和直径-厚度比对圆柱轴向压缩行为的影响。 RAC强度，钢管强度和型钢强度的增加显着影响圆柱的轴向承载能力，但是随着RAC强度和钢强度的增加，变形能力和延性逐渐降低。直径/厚度比的增加对长柱的轴向承载能力产生负面影响。在实验研究，有限元分析和极限分析方法的基础上，提出了复合柱轴向承载力的计算公式。通过比较结果验证了所提公式的有效性。研究结论可为复合柱的设计提供参考。

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