[1]王秋维,王福星,梁 林.方钢管UHPC短柱轴压力学性能及承载力计算研究[J].西安建筑科技大学学报(自然科学版),2022,54(02):298-305.[doi:10.15986/j.1006-7930.2022.02.018]
　WANG Qiuwei,WANG Fuxing,LIANG Lin.Mechanical properties of square steel UHPC short column in axial compression and bearing capacity calculation study[J].J. Xi’an Univ. of Arch. & Tech.(Natural Science Edition),2022,54(02):298-305.[doi:10.15986/j.1006-7930.2022.02.018]
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方钢管UHPC短柱轴压力学性能及承载力计算研究()
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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:
54
期数:
2022年02期
页码:
298-305
栏目:
出版日期:
2022-04-28

文章信息/Info

Title:
Mechanical properties of square steel UHPC short column in axial compression and bearing capacity calculation study
文章编号:
1006-7930(2022)02-0298-08
作者:
王秋维; 王福星; 梁 林
(西安建筑科技大学 土木工程学院, 陕西 西安 710055)
Author(s):
WANG Qiuwei;  WANG Fuxing;  LIANG Lin
(School of Civil Engineering, Xi’an Univ.of Arch. & Tech., Xi’an 710055, China)
关键词:
超高性能混凝土(UHPC);  钢管混凝土;  轴压力学性能;  承载力计算;  有限元模拟
Keywords:
ultra high performance concrete(UHPC);  steel pipe concrete short column;  axial compression mechanical properties;  bearing capacity calculation;  finite element analysis
分类号:
TU398+.9
DOI:
10.15986/j.1006-7930.2022.02.018
文献标志码:
A
摘要:
采用ABAQUS软件建立了方钢管超高性能混凝土(UHPC)短柱的有限元模型,通过与轴心受压试验试件的破坏形态和荷载-位移曲线进行对比,验证了有限元模型的适用性.基于此,进一步分析了钢管宽厚比、钢管强度和UHPC强度对试件荷载-位移曲线的影响,结果表明:试件的破坏模式有腰鼓型和剪切型两种,均表现为强度破坏; 试件的承载力随着宽厚比增大呈非线性下降,随UHPC强度或钢管强度的提高呈线性增长; 同时延性随钢材强度增加而增加,随UHPC强度增加而降低.最后,根据极限平衡理论,对UHPC约束区的分布情况进行了受力分析,建立了方钢管UHPC短柱轴压承载力的计算公式,计算与试验结果吻合良好.
Abstract:
ABAQUS software was used to establish the finite element model of square steel tube ultra-high performance concrete(UHPC)short column, and the applicability of the finite element model was verified by comparing with the damage pattern and load-displacement curve of the axial compression test specimen. After that, the effects of steel tube width-thickness ratio, steel tube strength and UHPC strength on the mechanical properties of the specimen were further analyzed. The results showed that the damage modes of the specimens were drum type and shear type, both of which are strength damage; the bearing capacity of specimens decreased nonlinearly with the increase of width-thickness ratio and increased linearly with the increase of UHPC strength or steel tube strength, and meanwhile, the ductility increased with the increase of steel strength, and decreased with the increase of UHPC strength. Finally, according to the limit equilibrium theory, the force analysis was carried out on the distribution of the UHPC restraint zone, the formula for calculating the axial compression load capacity of square steel tube UHPC short columns was established. The calculation was in good agreement with the test results.

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备注/Memo

备注/Memo:
收稿日期:2021-04-01修改稿日期:2022-04-25
基金项目:国家自然科学基金项目(51878543)
第一作者:王秋维(1982—),女,教授,博导,主要从事混凝土结构工程及其抗震研究.E-mail:wqw0815@126.com
更新日期/Last Update: 2022-04-28