[1]王兰,叶勇,郭子雄,等.带脱空的钢管混凝土短柱受剪性能有限元分析[J].华侨大学学报(自然科学版),2018,39(2):179-185.[doi:10.11830/ISSN.1000-5013.201710013]
　WANG Lan,YE Yong,GUO Zixiong,et al.Influence of Gap on Mechanical Performance of CFST Members Subjected to Combined Axial Compression and Shear Force[J].Journal of Huaqiao University(Natural Science),2018,39(2):179-185.[doi:10.11830/ISSN.1000-5013.201710013]
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带脱空的钢管混凝土短柱受剪性能有限元分析()
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《华侨大学学报（自然科学版）》[ISSN:1000-5013/CN:35-1079/N]

卷:
第39卷
期数:
2018年第2期
页码:
179-185
栏目:
出版日期:
2018-03-20

文章信息/Info

Title:
Influence of Gap on Mechanical Performance of CFST Members Subjected to Combined Axial Compression and Shear Force
文章编号:
1000-5013(2018)02-0179-07
作者:
王兰1; 3;  叶勇1; 2;  郭子雄1; 2;  王海峰1; 2
1. 华侨大学 土木工程学院, 福建 厦门 361021;2. 福建省结构工程与防灾重点实验室, 福建 厦门 361021; 3. 黎明职业大学 土木建筑工程学院, 福建 泉州 362000
Author(s):
WANG Lan1; 3;  YE Yong1; 2;  GUO Zixiong1; 2;  WANG Haifeng1; 2
1. College of Civil Engineering, Huaqiao University, Xiamen 361021, China; 2. Key Laboratory for Engineering and Disaster Prevention of Fujian Province, Xiamen 361021, China; 3. Department of Civil and Architectural Engineering, Liming Vocational University, Quanzhou 362000, China
关键词:
钢管混凝土;  受剪性能;  脱空;  轴压比;  有限元
Keywords:
concrete-filled steel tubular;  shear behavior;  gap;  axial compression ratio;  finite element
分类号:
TU398
DOI:
10.11830/ISSN.1000-5013.201710013
文献标志码:
A
摘要:
基于合理的材料本构模型和边界条件,考虑外钢管与核心混凝土之间的组合作用,建立带脱空的钢管混凝土(CFST)短柱在压剪受力状态下的有限元分析模型(FEM).研究脱空率、剪跨比和轴压比对试件受剪性能的影响,提出考虑脱空率及轴压比影响的带脱空钢管混凝土受剪承载力简化计算模型.结果表明:脱空削弱了CFST柱在弹塑性工作阶段的受剪性能,且降低了其抗剪承载力;随着剪跨比增加,脱空对试件在纯剪及压剪作用下的抗剪承载力影响降低;当脱空率小于0.2%时,随着轴压比的增加,试件抗剪承载力线性增长.
Abstract:
A finite element model(FEM)of concrete-filled steel tubular(CFST)member was established based on proper constitutive relation and boundary conditions. The composite actions between the outer steel tube and core concrete was taken into account, and a gap between the core concrete and steel tube was introduced into the FEM. Effect of the gap ratio, span-to-depth ratio, and axial compression ratio on the shear behavior of CFST members under combined axial compression and shear force was studied. A simplified model considered the effects of the gap ratio and axial compression ratio was proposed to predict the shear strength of CFST members with a gap. The numerical study indicates that the existence of the gap reduced the shear strength of the members on the elastic-plastic stage, and decreases the ultimate shear strength of the members; with the increase of the span-to depth ratio, the influence of the gap on the shear strength decreases. When the gap ratio is less than 0.2%, the shear strength increases with the increase of the axial compression ratio.

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备注/Memo

备注/Memo:
收稿日期: 2017-10-30
通信作者: 郭子雄(1967-),男,教授,博士,主要从事工程结构抗震防灾的研究.E-mail:guozxcy@hqu.edu.cn.
基金项目: 福建省自然科学基金面上资助项目(2016J01241); 福建省高校青年自然科学基金重点资助项目(JZ160410); 福建省中青年教师教育科研项目(JAT171081)http://www.hdxb.hqu.edu.cn
更新日期/Last Update: 2018-03-20