Experimental Research on Special-Shaped Concrete-Filled Steel Tubular Columns Under Axial Compression

Sicheng Li; Ran He; Zhangqi Hu; Hao Peng; Shenyun Liu

doi:10.13206/j.gjgS24091301

Volume 40 Issue 2

Feb. 2025

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Article Navigation > STEEL CONSTRUCTION(Chinese & English) > 2025 > 40(2): 21-28

Sicheng Li, Ran He, Zhangqi Hu, Hao Peng, Shenyun Liu. Experimental Research on Special-Shaped Concrete-Filled Steel Tubular Columns Under Axial Compression[J]. STEEL CONSTRUCTION(Chinese & English), 2025, 40(2): 21-28. doi: 10.13206/j.gjgS24091301

Citation:

Sicheng Li, Ran He, Zhangqi Hu, Hao Peng, Shenyun Liu. Experimental Research on Special-Shaped Concrete-Filled Steel Tubular Columns Under Axial Compression[J]. STEEL CONSTRUCTION(Chinese & English), 2025, 40(2): 21-28. doi: 10.13206/j.gjgS24091301

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Experimental Research on Special-Shaped Concrete-Filled Steel Tubular Columns Under Axial Compression

doi: 10.13206/j.gjgS24091301

Sicheng Li¹,
Ran He^{1,2
,
,},
Zhangqi Hu¹,
Hao Peng¹,
Shenyun Liu²

1. College of Civil Engineering, Hunan City University, Yiyang 413000, China;
2. Hunan Hongyun Hangxiao Green Building Technology Co., Ltd., Changde 415137, China

Received Date: 2024-09-13
Available Online: 2025-03-24

Abstract

Abstract

L-shaped, T-shaped and cross-shaped concrete-filled steel tubular columns are composed of square steel pipes and concrete, and the mechanical properties of the two materials were synthesized. A total of 9 specimens, including L-shaped, T-shaped and cross-shaped concrete-filled steel tubular columns with different length to slenderness ratios, were tested by axial compression tests, and the effects of the cross-section form and the length of the specimens on the damage morphology of the specimens, load-deflection curves, load-strain curves and load-Poisson’s ratio curves were investigated by comparative studies. The results showed that the short columns suffered from section strength damage and the long columns suffered from bending damage. Within the length range studied in this paper, the specimen length had a greater effect on the bearing capacity of L-section specimens and T-section specimens, and the bearing capacity of cross-section specimens was less affected by this effect. The horizontal deflections of all specimens were almost linearly related to the loads, and developed rapidly after yielding. Shaped columns showed the maximum strain at 1/2 height, and thePoisson’s ratio increased as loading proceeded.
- special-shaped concrete-filled steel tubes,
- axial compression,
- mechanical properties,
- failure mode,
- bearing capacity

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References

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