多腔钢管混凝土组合L形柱压弯承载性能

胡超; 程睿; 罗鋆; 杨溥

doi:10.3724/j.gyjzG24091602

多腔钢管混凝土组合L形柱压弯承载性能

doi: 10.3724/j.gyjzG24091602

重庆大学土木工程学院, 重庆 400044

基金项目:

国家重点研发计划（2016YFC0701506）。

详细信息

作者简介:
胡超，博士研究生，主要从事钢-混凝土组合结构和风电结构研究。

通讯作者:
程睿，副教授，主要从事钢结构和钢-混凝土组合结构研究， chengrui@cqu.edu.cn。

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出版历程
- 收稿日期: 2024-09-16
- 刊出日期: 2025-10-31

Bearing Capacity of Multi-Cell L-Shaped CFST Columns Under Compression and Bending

School of Civil Engineering, Chongqing University, Chongqing 400044, China

摘要

摘要: 为了提出多腔钢管混凝土L形柱（ML-CFST）在不同受力情况下的承载力计算方法，并使其具有统一性，针对由3个矩形截面组合而成的多腔钢管混凝土组合L形柱，利用有限元软件ABAQUS分析不同参数对其单向受弯、任意角度受弯及偏压性能的影响。研究表明：钢管屈服强度、钢管厚度和腹板肢高度对ML-CFST构件受弯承载力的影响较大；M_0°和M_180°因其抗弯刚度最小，相对于其他角度受弯承载力较小；双向偏压承载力归一化相关曲线形状类似椭圆，钢管屈服强度和混凝土抗压强度对其曲线形状的影响较小；双向偏压承载力归一化相关曲线随着轴压比的增大而外扩。基于理论分析和数值结果回归分析，提出了多腔钢管混凝土L形构件单向受弯、任意角度受弯、单向压弯及双向压弯承载力的计算方法。
- 钢管混凝土 /
- 异形柱 /
- 有限元分析 /
- 压弯 /
- 计算方法
Abstract: In order to develop unified calculation methods for the bearing capacities of multi-cell L-shaped concrete-filled steel tubular （ML-CFST） columns under different loading conditions， a finite element analysis was conducted using ABAQUS. The effects of different parameters on the behavior of the ML-CFST columns were analyzed under uniaxial bending， bending at any angle， and eccentric compression. The study results demonstrated that the steel yield strength， steel tube thickness， and height of the web limb had a great influence on the flexural capacity. The flexural capacities M_0° and M_180° were found to be lower than those at other angles due to the minimal bending stiffness in these directions. The shape of the M_x₀/M_π/4-M_y₀/M_3π/4 curve was similar to an ellipse. The steel yield strength and concrete compressive strength had a minor influence on the curve shape. The normalized interaction curve for biaxial eccentric compression expanded outward as the axial compression ratio increased. Based on theoretical and regression analyses of the numerical results， design methods for the bearing capacity of ML-CFST members under uniaxial bending， bending at any angle， and eccentric compression were proposed.
- concrete-filled steel tube /
- special-shaped column /
- finite element analysis /
- compression and bending /
- calculation method

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参考文献(16)

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