[1]程高,张正琦,刘永健,等.界面状态对椭圆钢管混凝土轴压短柱影响分析[J].深圳大学学报理工版,2018,35(5):444-452.[doi:10.3724/SP.J.1249.2018.05444]
　CHENG Gao,ZHANG Zhengqi,LIU Yongjian,et al.The behaviors of concrete-filled EHS steel stub columns under different interface states[J].Journal of Shenzhen University Science and Engineering,2018,35(5):444-452.[doi:10.3724/SP.J.1249.2018.05444]
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界面状态对椭圆钢管混凝土轴压短柱影响分析()
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《深圳大学学报理工版》[ISSN:1000-2618/CN:44-1401/N]

卷:
第35卷
期数:
2018年第5期
页码:
444-452
栏目:
土木建筑工程
出版日期:
2018-09-25

文章信息/Info

Title:
The behaviors of concrete-filled EHS steel stub columns under different interface states
作者:
程高1; 2; 3;  张正琦1 ;  刘永健1; 2; 3;  孟俊苗1; 2; 3
1）长安大学公路学院，陕西西安 710064；2）陕西省公路桥梁与隧道重点实验室，陕西西安 710064；3）旧桥检测与加固技术交通行业重点实验室（西安），陕西西安 710064
Author(s):
CHENG Gao1; 2; 3;  ZHANG Zhengqi1;  LIU Yongjian1; 2; 3;  and MENG Junmiao1; 2; 3
1) School of Highway, Chang’an University, Xi’an 710064, Shaanxi Province, P.R.China 2) Shaanxi Provincial Major Laboratory for Highway Bridge & Tunnel, Xi’an 710064, Shaanxi Province, P.R.China 3) Key Laboratory of Bridge Detection Reinforcement Technology Ministry of Communications, Xi’an 710064, Shaanxi Province, P.R.China
关键词:
桥梁工程; 钢管混凝土; 椭圆; 界面状态; 受荷方式; 短柱; 有限元分析
Keywords:
bridge engineering;  concrete-filled steel tube;  elliptical hollow sections;  interface state;  loading model;  stub columns;  finite element analysis
分类号:
TU 398.9
DOI:
10.3724/SP.J.1249.2018.05444
文献标志码:
A
摘要:
为分析界面状态对椭圆钢管混凝土轴压短柱力学性能的影响，构建了脱黏、有粘结滑移和完全粘结等3种典型界面状态的本构模型，并采用ABAQUS进行数值模拟. 围绕椭圆钢管混凝土轴压构件在工程应用中可能出现的典型受荷方式，如钢管和混凝土共同受力、仅混凝土受力、仅钢管受力等，建立非线性有限元模型，分析界面状态对构件的钢-混界面压法向应力、钢管及混凝土截面压应力、极限承载力和轴压刚度等力学性能的影响规律. 结果表明：仅混凝土受力和仅钢管受力模式下，界面状态显著影响椭圆钢管混凝土轴压短柱的力学性能；界面粘结作用越强，钢管和混凝土互相帮助分担荷载的能力就越强，构件抵抗变形的能力就越强；钢管和混凝土共同受力模式下，界面状态对构件钢管和混凝土截面压应力、极限承载力及轴压刚度几乎无影响.
Abstract:
The interface state between steel tube and concrete is easily affected by shrinkage, creep, temperature and force exerting modes, thus affecting the performance of concrete filled steel tubular columns and joints. In this paper, we mainly discuss the behaviors of concrete-filled elliptical hollow sections (EHS) steel stub columns under different interface states. Based on the push-out test, we establish interface constitutive models typically including unbounded, bonded completely, or bond slip in ABAQUS. For expanding the applications, concrete-filled EHS steel stub columns emerge different loading modes, not only loading through the whole cross section, but also loading through steel alone or loading through concrete alone. Therefore, few nonlinear finite element models are established to analyze interfacial stress, sectional compressive stress, ultimate bearing capacity and axial stiffness. The results show that the mechanical behaviors of concrete-filled EHS steel stub columns loading through concrete alone and loading through steel alone are significantly affected by interface states. The stronger the interfacial cohesion is, the more load the steel tube or concrete shares, and the greater the axial compressive stiffness becomes. The interface state has nothing to do with mechanical behavior of concrete-filled EHS steel stub columns loading through the whole cross section.

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更新日期/Last Update: 2018-08-21