多螺旋箍筋钢管混凝土方柱轴压性能有限元分析

赵家祥; 杨坤; 孙珊珊; 王亚昆

doi:10.3724/j.gyjzG24101705

多螺旋箍筋钢管混凝土方柱轴压性能有限元分析

doi: 10.3724/j.gyjzG24101705

长安大学建筑工程学院, 西安 710061

基金项目:

国家自然科学基金项目（51708035）。

详细信息

作者简介:
赵家祥，硕士研究生。zhaojiaxiang0220@163.com

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出版历程
- 收稿日期: 2024-10-17
- 网络出版日期: 2026-07-06

Finite Element Analysis on the Axial Compressive Performance of Square Concrete-Filled Steel Tubular Columns Confined with Multi-Spiral Stirrups

School of Civil Engineering, Chang'an University, Xi'an 710061, China

摘要

摘要: 为解决钢管混凝土方柱的截面周边中部约束力较弱的问题，提出将多螺旋箍筋内置于钢管中，并对该类型方柱的轴压性能进行研究。基于已有试验研究，通过有限元软件ABAQUS进行数值模拟分析，验证了所建立的单螺旋箍筋钢管混凝土方柱有限元模型的合理性。基于此，建立五螺旋箍筋钢管混凝土方柱的有限元模型，进一步研究箍筋间距、直径及强度、钢管厚度、混凝土强度等因素对其轴压性能的影响。研究结果表明：内置五螺旋箍筋弥补了方钢管对横截面周边中部混凝土约束力较弱的问题，提高了钢管混凝土方柱的承载能力和延性性能；相同体积配箍率下，五螺旋箍筋钢管混凝土方柱的承载力和延性系数均明显高于单螺旋箍筋钢管混凝土方柱。此外，探讨了多螺旋箍筋钢管混凝土方柱的约束机理，采用强度叠加原理，推导了多（单）螺旋箍筋钢管混凝土方柱的轴压承载力计算公式。
- 钢管混凝土方柱 /
- 有限元分析 /
- 多螺旋箍筋 /
- 承载力 /
- 延性 /
- 轴压性能
Abstract: To solve the problem of weak restraint capacity around the cross-section of square concrete-filled steel tubular（CFST） columns， this paper proposes incorporating multi-spiral stirrups inside the steel tube and study the axial compressive performance of this type of square column. Based on the existing experimental research， this study conducted numerical simulation analysis using the finite element software ABAQUS and verified the validity of the established finite element model for square CFST columns confined with multi-spiral stirrups. Based on this method， the finite element model of square CFST columns confined with five-spiral stirrups was established to further study the effects of stirrup spacing， stirrup diameter， stirrup strength， steel tube thickness， concrete strength， and other factors on their axial compressive performance. The results showed that the built-in five-spiral stirrups compensated for the weak restraint capacity of the square steel tube on the concrete in the middle of the periphery of the cross-section， and improved the bearing capacity and ductility of the square CFST column； under the same stirrup ratio by volume， the bearing capacity and ductility coefficient of CFST square columns confined with five-spiral stirrups were significantly higher than those of square CFST columns confined with single-spiral stirrups. In addition， the paper discussed the restraining mechanism of square CFST columns confined with multi-spiral stirrups and adopted the principle of strength superposition to derive the calculation formula for the axial compressive bearing capacity of square CFST columns confined with multi （single）-spiral stirrups.
- concrete-filled steel tubular square column /
- finite element analysis /
- multi-spiral stirrup /
- bearing capacity /
- ductility /
- axial compressive performance

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