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

ZHANG Xuechang; LI Yanhua; ZHANG Sumei; WANG Yuyin; ZHOU Chong

doi:10.3724/j.gyjzG24080306

Volume 55 Issue 1

Jan. 2025

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Article Navigation > INDUSTRIAL CONSTRUCTION > 2025 > 55(1): 110-119

Wang Yuanqing, Lin Yun, Zhang Yannian, Shi Gang, Shi Yongjiu. EXPERIMENTAL STUDY ON THE IMPACT TOUGHNESS OF Q460-C HIGH-STRENGTH CONSTRUCTION STEEL AT LOW TEMPERATURE[J]. INDUSTRIAL CONSTRUCTION, 2012, 42(1): 8-12,102. doi: 10.13204/j.gyjz201201002

Citation:

ZHANG Xuechang, LI Yanhua, ZHANG Sumei, WANG Yuyin, ZHOU Chong. Experimental Research on Long-Term Performance of Axially Loaded Steel- Tube-Confined CFST Short Columns Considering Temperature Effect[J]. INDUSTRIAL CONSTRUCTION, 2025, 55(1): 110-119. doi: 10.3724/j.gyjzG24080306

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

doi: 10.3724/j.gyjzG24080306

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

Received Date: 2024-08-03
Available Online: 2025-03-28

Abstract

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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References(20)

References

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