Scholarlink

<p>Based on existing triaxial plastic-damage constitutive models for concrete and elastic–plastic constitutive models for steel, a three-dimensional refined finite element (FE) model of rectangular concrete-filled steel tube (CFT) short columns under axial compression is developed. The FE analysis results, including damage morphology, load–displacement curves, and ultimate bearing capacity, are compared with experimental data. Following experimental validation, a parametric study is performed to evaluate the influence of steel tube strength, concrete strength, tube wall thickness, and length-to-width ratio on the load–displacement response. At ultimate bearing capacity, the confined and unconfined zones within the rectangular cross-section are identified, and the average von Mises stresses in these regions are quantified. A practical formula for predicting the axial load-carrying capacity, incorporating a confinement coefficient, is proposed. Comparisons of the ultimate bearing capacity obtained from the proposed formula with experimental results and FE predictions confirm its accuracy and validity. The proposed formula demonstrates superior performance compared with existing formulas presented in other studies and current design codes.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Mechanical Behavior of Rectangular CFT Stub Column Under Axial Compression

  • 期刊论文

  • 发表日期：

    2026年4月29日

查看全文
  • Yuxiang Yan,
  • Liang Luo,
  • Yuemin Wang,
  • Lian Shao,
  • Hui Lv

摘要

Based on existing triaxial plastic-damage constitutive models for concrete and elastic–plastic constitutive models for steel, a three-dimensional refined finite element (FE) model of rectangular concrete-filled steel tube (CFT) short columns under axial compression is developed. The FE analysis results, including damage morphology, load–displacement curves, and ultimate bearing capacity, are compared with experimental data. Following experimental validation, a parametric study is performed to evaluate the influence of steel tube strength, concrete strength, tube wall thickness, and length-to-width ratio on the load–displacement response. At ultimate bearing capacity, the confined and unconfined zones within the rectangular cross-section are identified, and the average von Mises stresses in these regions are quantified. A practical formula for predicting the axial load-carrying capacity, incorporating a confinement coefficient, is proposed. Comparisons of the ultimate bearing capacity obtained from the proposed formula with experimental results and FE predictions confirm its accuracy and validity. The proposed formula demonstrates superior performance compared with existing formulas presented in other studies and current design codes.