[1]张瀚文、欧智菁、韦建刚.高强方钢管约束UHPC短柱轴压性能研究[J].福建工程学院学报,2019,17(04):314-320.[doi:10.3969/j.issn.1672-4348.2019.04.002]
　ZHANG Hanwen,OU Zhijing,WEI Jiangang.Study on the axial compression performance of UHPC short columns restrained by high-strength square steel tubes[J].Journal of FuJian University of Technology,2019,17(04):314-320.[doi:10.3969/j.issn.1672-4348.2019.04.002]
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高强方钢管约束UHPC短柱轴压性能研究()
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《福建工程学院学报》[ISSN:2097-3853/CN:35-1351/Z]

卷:
第17卷
期数:
2019年04期
页码:
314-320
栏目:
出版日期:
2019-08-25

文章信息/Info

Title:
Study on the axial compression performance of UHPC short columns restrained by high-strength square steel tubes
作者:
张瀚文、欧智菁、韦建刚
福建工程学院土木学院
Author(s):
ZHANG Hanwen;  OU Zhijing;  WEI Jiangang
School of Civil Engineering, Fujian University of Technology
关键词:
高强方钢管; 钢管约束混凝土; 极限承载力; 超高性能混凝土
Keywords:
high-strength square steel pipes;  steel tube confined concrete;  ultimate bearing capacity;  ultra-high performance concrete
分类号:
TU398.9
DOI:
10.3969/j.issn.1672-4348.2019.04.002
文献标志码:
A
摘要:
使用通用有限元软件ABAQUS分析了钢材屈服强度、方钢管厚度、UHPC强度对高强方钢管约束UHPC短柱轴压性能的影响。首先使用ABAQUS对已有的普通钢管约束混凝土试验进行计算，结果与试验值基本一致。在此基础上建立了高强方钢管约束UHPC短柱模型，对比了不同参数下构件荷载-位移曲线、荷载-纵向应变曲线的变化特征。研究表明:构件前期刚度受混凝土强度影响很小，但由于增加混凝土强度使构件套箍系数降低，工作曲线下降段斜率增大，延性下降。钢管屈服强度的提高对构件的延性有很大改善，但对极限承载能力影响较小。核心混凝土强度是影响高强钢管约束UHPC短柱承载能力的主要因素，由于钢管不直接承担纵向荷载，仅对混凝土产生材料性能上的影响，钢管约束混凝土应看做混凝土的一种。
Abstract:
The effects of steel yield strength, square steel tube thickness and UHPC strength on the axial compression performance of UHPC short column restrained by high strength square steel tube were analyzed by using general finite element software ABAQUS. Firstly, ABAQUS was used to conduct calculations for the existing confined concrete test of ordinary steel tubes, and the results were basically consistent with the test values. On this basis, the UHPC short column model of high-strength square steel tubes was established, and the change characteristics of load-displacement curve and load-longitudinal strain curve of components under different parameters were compared. The research shows that concrete strength has little influence on the initial stiffness of components, but the increase of concrete strength reduces the collar coefficient of components, increases the slope of the downward section of the work curve, and decreases the ductility. The increase of the yield strength of steel pipes can greatly improve the ductility of the components, but it has little influence on the ultimate bearing capacity. The strength of core concrete is the major factor that affects the bearing capacity of UHPC short column restrained by high-strength steel tubes. Since steel tubes do not bear longitudinal load directly, and it only affects the material performance of the concrete, steel tube restrained concrete should be regarded as a kind of concrete.

参考文献/References:

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更新日期/Last Update: 2019-08-25