[1]王夏欣,程 欣,廖芳芳.冷弯方钢管截面轴压和压弯极限承载力研究.[J].西安建筑科技大学学报(自然科学版),2021,53(03):404-412.[doi:10.15986/j.1006-7930.2021.03.012]
　WANG Xiaxin,CHENG Xin,LIAO Fangfang.Research on ultimate bearing capacity of cold-formed steel square hollow sections[J].J. Xi’an Univ. of Arch. & Tech.(Natural Science Edition),2021,53(03):404-412.[doi:10.15986/j.1006-7930.2021.03.012]
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冷弯方钢管截面轴压和压弯极限承载力研究.()
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西安建筑科技大学学报（自然科学版）[ISSN:1006-7930/CN:61-1295/TU]

卷:
53
期数:
2021年03期
页码:
404-412
栏目:
出版日期:
2021-06-28

文章信息/Info

Title:
Research on ultimate bearing capacity of cold-formed steel square hollow sections
文章编号:
1006-7930(2021)03-0404-09
作者:
王夏欣1; 程 欣1; 廖芳芳2
(1.太原理工大学 土木工程学院,山西 太原 030024; 2.长安大学 建筑工程学院,陕西 西安,710061)
Author(s):
WANG Xiaxin1; CHENG Xin1; LIAO Fangfang2
(1.Department of Civil Engineering,Taiyuan University of Technology,Taiyuan 030024,China; 2.School of Civil Engineering,Chang’an University,Xi’an 710061,China)
关键词:
冷弯方形截面;  有效塑性宽度法;  极限承载力;  局部屈曲;  单向压弯
Keywords:
cold-formed SHS;  the effective plastic width method;  ultimate capacity;  local buckling;  uniaxial bending
分类号:
TU391
DOI:
10.15986/j.1006-7930.2021.03.012
文献标志码:
A
摘要:
冷弯方钢管构件在建筑钢结构的应用愈加广泛,因此有必要对不同厚度冷弯方形截面的极限抗压和抗弯承载力进行研究.首先利用Abaqus建立了考虑初始几何缺陷、几何和材料非线性以及冷弯效应等因素影响的冷弯方钢管有限元模型,并通过试验校核验证了模型的准确性.基于该模型完成了冷弯方钢管在不同宽厚比和轴压比组配下的参数分析,探究其对极限承载力的影响.通过对构件破坏模态及截面应力发展全过程的分析,并基于不同宽厚比和轴压比下的四种应力分布模型,提出了用以计算冷弯方形截面极限承载力的有效塑性宽度法.最后将有效塑性宽度法与现行规范以及参数分析结果进行对比,证明了有效塑性宽度法的准确性与适用性.
Abstract:
Cold-formed square hollow section(SHS)members have been increasingly used in building steel structure and it’s necessary to study the ultimate compressive and bending capacities of SHS with different thickness.The Abaqus finite element model,considering the effect of initial geometric defects,geometric and material nonlinearity and cold-formed effect,was established first and verified by previous experimental studies.A series of parametric analysis on cold-formed SHS members was then conducted,with different section slenderness as well as different axial force ratios in order to investigate their influence to ultimate bearing capacities.Through analysis of failure modes and stress development process and based on four stress distribution models in the limit state,the effective plastic width method(EPM)was proposed to calculate the ultimate bearing capacities of cold-formed SHS.Compared with Chinese standards,European code and parametric study results,the proposed EPM is proved to provide more accurate design predictions and convenient calculations.

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(编辑 吴海西 沈 波)

备注/Memo

备注/Memo:
收稿日期:2020-10-15 修改稿日期:2021-05-07
基金项目:国家自然科学基金面上项目(51978437); 山西省高等学校科技创新项目(2019L1005)
第一作者:王夏欣(1997-),女,硕士生,主要从事钢结构研究.E-mail:799749409@qq.com
通信作者:程 欣(1986-),女,博士,副教授,主要从事钢结构研究. E-mail:xchengtyut@126.com
更新日期/Last Update: 2021-06-28