钢骨不锈钢管超高性能混凝土柱轴压性能研究

刘子丹; 焦文帅; 程展; 杜国锋

doi:10.13204/j.gyjzG22072605

钢骨不锈钢管超高性能混凝土柱轴压性能研究

doi: 10.13204/j.gyjzG22072605

1. 长江大学城市建设学院, 湖北荆州 434000;
2. 中梁控股集团有限公司, 上海 200333

基金项目:

国家自然科学基金项目(52078052)。

详细信息

作者简介:
刘子丹,男,1999年出生,硕士研究生。

通讯作者:
杜国锋,博士,教授,gfdu@yangtzeu.edu.cn。

计量
- 文章访问数: 196
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- PDF下载量: 9
- 被引次数: 0
出版历程
- 收稿日期: 2022-07-26

Research on the Axial Compression Behavior of Steel-Reinforced Ultra-High Performance Concrete-Filled Stainless Steel Tubular Columns

1. School of Urban Construction, Yangtze University, Jingzhou 434000, China;
2. Zhongliang Holdings Group Company Limited, Shanghai 200333, China

摘要

摘要: 不锈钢管混凝土柱在海港工程、海洋工程等腐蚀环境下具有较好的应用前景。为进一步提升此类结构的性能,提出了一种组合结构,即内置钢骨的不锈钢管超高性能混凝土柱。同时,以径厚比、长径比和含骨率等为参数设计制作了6个短柱和8个中长柱试件,进行了轴心受压试验和有限元模拟分析,研究了试件的破坏形态、破坏机理,以及相关参数对试件力学性能的影响规律。结果表明:试件的承载力及延性随着径厚比和长径比的减小而增大,随着含骨率和内置钢骨强度的增加而增加;试件延性随着核心混凝土强度增大而降低,承载力与之相反。根据试验和有限元的分析结果,提出了内置钢骨的不锈钢管超高性能混凝土柱的承载力预测模型,为此类结构的工程应用提供了参考。
- 不锈钢管混凝土 /
- 钢骨钢管混凝土 /
- 超高性能混凝土 /
- 有限元分析 /
- 轴压性能
Abstract: Concrete-filled stainless steel tubular columns show excellent prospects for application in corrosive environments such as harbor engineering and marine engineering. To further develop the performance of such structures, a composite structure, i. e. steel-reinforced ultra-high performance concrete-filled stainless steel tubular column was proposed in this paper. Meanwhile, six short and eight medium-length column specimens were designed and fabricated with the parameters of diameter to thickness ratio, length to diameter ratio, steel profile content ratios, etc. Axial compression experiments and finite element analysis were executed to investigate the failure mode and failure mechanism of the specimens, as well as the influence of relevant parameters on the mechanical performance of the specimens. The results showed that the bearing capacity and ductility of the specimens increased with the decreasing of the diameter to thickness ratios and length to diameter ratios, and increased with the increding of the steel profile content ratios and strength of the pre-embedded steel profile; the ductility of the specimen decreased with the increase in core concrete strength, but the bearing capacity was the opposite. Based on the experimental and finite element results, a prediction model for the bearing capacity of steel-reinforced ultra-high performance concrete-filled stainless steel tubular was proposed, providing a reference for the engineering application of such structures.
- concrete-filled stainless steel tubular /
- steel-reinforced concrete-filled steel tubular /
- ultra-high performance concrete /
- finite element analysis /
- axial compression performance

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