配置高强钢的圆钢管约束型钢混凝土短柱轴压性能研究

钱正昊; 王卫永

doi:10.13206/j.gjgS24091402

配置高强钢的圆钢管约束型钢混凝土短柱轴压性能研究

doi: 10.13206/j.gjgS24091402

钱正昊¹,
王卫永^1,2, ,

1. 重庆大学土木工程学院, 重庆 400045;
2. 重庆大学山地城镇建设与新技术教育部重点实验室, 重庆 400045

详细信息

作者简介:
钱正昊,硕士,主要从事钢-混凝土组合结构性能研究,20221601070@stu.cqu.edu.cn。

通讯作者:
王卫永,博士,教授,主要从事钢结构和组合结构抗火性能方向研究,wywang@cqu.edu.cn。

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出版历程
- 收稿日期: 2024-09-14
- 网络出版日期: 2025-03-24

Research on Mechanical Properties of Circular Tubed Steel-Reinforced Concrete Stub Columns with High-Strength Steel Under Axial Compression

Zhenghao Qian¹,
Weiyong Wang^{1,2
, ,}

1. School of Civil Engineering, Chongqing University, Chongqing 400045, China;
2. Key Laboratory of New Technology for Construction of Cities in Mountain Area (Ministry of Education), Chongqing University, Chongqing 400045, China

摘要

摘要: 将高强钢应用于圆钢管约束型钢混凝土柱中,不仅可以避免局部屈曲问题,还能有效提高构件的力学性能,充分发挥组合结构的优势。采用ABAQUS软件建立了轴压荷载作用下圆钢管约束型钢混凝土短柱的有限元分析模型,分析了钢骨形状、钢骨强度、钢管强度、混凝土强度及含钢率等参数对配置高强钢的圆钢管约束型钢混凝土柱轴压性能的影响规律。在此基础上,对圆钢管约束型钢混凝土柱各部件的荷载贡献值与峰值状态下截面应力进行了深入分析。研究结果表明:圆钢管约束型钢混凝土柱的轴压承载力随着钢管、钢骨及混凝土强度的增加而提高;钢管通过与混凝土之间的摩擦提供轴向承载力,但其值与钢管强度和混凝土强度无关;此外,钢管还通过对混凝土的约束效应间接影响构件的轴向承载力,钢骨形状通过改变混凝土约束面积影响构件的轴压性能,钢骨强度的提高会增加钢骨的荷载贡献值,进而影响构件的承载力;在相同含钢率的情况下,钢管强度的提高对构件轴向承载力的提升作用大于钢骨强度的提高。
- 圆钢管约束型钢混凝土 /
- 高强钢 /
- 轴压性能 /
- 有限元分析
Abstract: Incorporating high-strength steel in circular tubed steel-reinforced concrete (STRC) stub columns offers several advantages, including avoiding local buckling in thin-walled steel and enhancing the mechanical properties of the columns. This paper employed the ABAQUS software to develop a finite element analysis model for circular steel tube-reinforced concrete stub columns under axial compression. Systematic parameter analysis was conducted to examine the effects of factors such as the shape and strength of the steel section, the strength of the steel tube and concrete, and the steel ratio. The load contribution values and section stresses of each component in the STRC columns were analyzed to further reveal the mechanism of the columns under axial compression. The results revealed that the bearing capacity of STRC columns under axial compression increased with the strength of the steel tube, steel profile, and concrete. The steel tube provided axial-bearing capacity through friction with the concrete, although this capacity was independent of the strength of the steel tube or the concrete. Additionally, the axial bearing capacity was affected by the steel tube indirectly through the confining effect on the concrete. The shape change of the steel profile would alter the confining area of the concrete, which in turn influenced the mechanical properties of the component under axial compression.Enhancing the strength of the steel profile would improve its load contribution, thereby affecting the bearing capacity of the component. With the same steel content, an increase in the strength of the steel tube had a greater effect on augmenting the axial bearing capacity than the same increase in the strength of the steel profile.
- circular tubed steel-reinforced concrete /
- high-strength steel /
- mechanical properties under axial compression /
- finite element analysis

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