考虑温度影响的钢管约束钢管混凝土轴压短柱长期性能试验研究

张学昌; 李艳华; 张素梅; 王玉银; 周冲

doi:10.3724/j.gyjzG24080306

考虑温度影响的钢管约束钢管混凝土轴压短柱长期性能试验研究

doi: 10.3724/j.gyjzG24080306

张学昌^1,2,
李艳华^1,2,
张素梅^1,2, ,,
王玉银³,
周冲^1,2

1. 哈尔滨工业大学深圳土木与环境工程学院, 广东深圳 518000;
2. 广东省土木工程智能韧性结构重点实验室,广东深圳 518000;
3. 哈尔滨工业大学土木工程学院, 哈尔滨 150090

基金项目:

国家自然科学基金项目(51878219)。

详细信息

作者简介:
张学昌,工学硕士,1667165322@qq.com。

通讯作者:
张素梅,工学博士,教授,主要从事组合结构和钢结构的研究,smzhang@hit.edu.cn。

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- 文章访问数: 31
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- 被引次数: 0
出版历程
- 收稿日期: 2024-08-03
- 网络出版日期: 2025-03-28

Experimental Research on Long-Term Performance of Axially Loaded Steel- Tube-Confined CFST Short Columns Considering Temperature Effect

ZHANG Xuechang^1,2,
LI Yanhua^1,2,
ZHANG Sumei^{1,2
, ,},
WANG Yuyin³,
ZHOU Chong^1,2

1. Civil and Environmental Engineering, Harbin Institute of Technology(Shenzhen), Shenzhen 518000, China;
2. Guangdong Provincial Key Laboratory of Intelligent and Resilient Structures for Civil Engineering, Shenzhen 518000, China;
3. School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China

摘要

摘要: 为探究钢管约束钢管混凝土短柱在轴心受压状态下的长期性能,设计并制作了10根钢管约束钢管混凝土短柱和2根钢管混凝土短柱试件,进行了850 d的轴压持荷试验,对比分析了核心混凝土初始应力比(0.35、0.50、0.65)、内外层钢管含钢率比值(0.30、1.25、2.23)和温度(20、45、55 ℃)对试件长期变形的影响。对6个常温下的持荷试件、6个经历了温度作用的持荷试件和4个未持荷的对比试件进行了轴压承载力试验,探究了长期荷载与温度作用对试件轴压承载力的影响规律。结果表明:内外层钢管含钢率比值越大、核心混凝土初始应力比越小、温度越小,钢管约束钢管混凝土短柱的长期变形越小;长期荷载与温度共同作用对试件的初始刚度和轴压承载力无显著影响。
- 温度 /
- 钢管约束 /
- 钢管混凝土 /
- 长期性能 /
- 轴压承载力
Abstract: In order to explore the long-term performance of steel-tube-confined concrete-filled steel tube (TCFST) short columns under axial compression, 10 specimens of TCFST short columns and 2 specimens of concrete-filled steel tube (CFST) short columns were designed and loaded under sustained axial compression for 850 days. The main research parameters include the stress ratio of core concrete (0.35,0.50 and 0.65), the ratio between inner and outer steel tubes (0.30,1.25 and 2.23), and the temperature (20,45 and 55 ℃). The effects of various parameters on the long-term deformation performance of specimens were compared and analysed. Axial compression tests were performed on 6 load-bearing specimens at room temperature, 6 load-bearing specimens subjected to the temperature action, as well as 4 load-free specimens for comparison, to investigate the influence of long-term loads and temperature effect on the axial compression bearing capacity. The results showed that the larger ratio between inner and outer steel tubes, the smaller stress ratio of core concrete, and the smaller temperature led to a long-term deformation of the TCFST. The combined effects of long-term loading and temperature had no significant effect on the initial stiffness and axial bearing capacity of the TCFST.
- temperature /
- steel tube confinement /
- concrete-filled steel tube /
- long-term performance /
- axial bearing capacity

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参考文献(20)

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