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山东大学学报 (工学版) ›› 2024, Vol. 54 ›› Issue (3): 103-114.doi: 10.6040/j.issn.1672-3961.0.2023.178

• 土木工程 • 上一篇    

异形钢管混凝土轴压短柱力学性能

罗靓1,2,晏宇翔1,2,吕辉1,2*,张成明1,2   

  1. 1.南昌航空大学土木建筑学院, 江西 南昌 330063;2.江西省装配式建筑与智能建造重点实验室, 江西 南昌 330063
  • 发布日期:2024-06-28
  • 作者简介:罗靓(1984— ),男,江西吉安人,讲师,硕士生导师,博士,主要研究方向为钢-混凝土组合结构. E-mail:luoliang@nchu.edu.cn. *通信作者简介:吕辉(1982— ),男,江西上饶人,副教授,硕士生导师,博士,主要研究方向为装配式建筑. E-mail:lvhui@nchu.edu.cn
  • 基金资助:
    国家自然科学基金资助项目(52268031);江西省住建厅2023年科技项目(钢管混凝土组合结构设计方法及工程应用);南昌航空大学博士启动基金资助项目(EA201911291)

Mechanical behavior of special-shaped CFT stub column under axial compression

LUO Liang1,2, YAN Yuxiang1,2, LÜ Hui1,2*, ZHANG Chengming1,2   

  1. 1. College of Civil Engineering and Architecture, Nanchang Hangkong University, Nanchang 330063, Jiangxi, China;
    2. Jiangxi Provincial Key Laboratory of Prefabricated Building and Intelligent Construction, Nanchang 330063, Jiangxi, China
  • Published:2024-06-28

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摘要： 基于已有混凝土三轴塑性-损伤本构模型和钢材弹塑性本构模型,建立L形、T形、十字形3种异形钢管混凝土轴压短柱的三维实体精细有限元模型。在已有试验验证的基础上开展参数分析,对比钢管强度、混凝土强度、腹板高厚比和钢管壁厚对荷载-位移曲线的影响。结果表明:当钢管屈服强度或钢管壁厚增大时,柱的极限承载力明显增大,延性更好;当混凝土强度等级或腹板高厚比增大时,柱的极限承载力增大,但延性变差。确定了3种短柱达到极限承载力时的约束区与非约束区面积及其对应的混凝土Mises平均应力,提出考虑约束系数的承载力实用计算公式,此约束系数主要与腹板高厚比有关。将此公式计算得到极限承载力与试验值、有限元值对比,证明了公式的精确性和有效性,可用于3种异形钢管混凝土轴压短柱的承载力计算。

关键词: 异形钢管混凝土柱, 力学性能, 有限元分析, 极限承载力, 约束系数

中图分类号: 

  • TU398
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