Mechanical Properties of Double-Tube Seawater and Sea Sand Concrete Columns with Built-in CFRP Tubes Under Axial Compression

MOU Kun-ting; WEI Yang; WANG Gao-fei; DONG Feng-hui; ZHENG Kai-qi

doi:10.13204/j.gyjzG22030410

Volume 52 Issue 9

Sep. 2022

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MOU Kun-ting, WEI Yang, WANG Gao-fei, DONG Feng-hui, ZHENG Kai-qi. Mechanical Properties of Double-Tube Seawater and Sea Sand Concrete Columns with Built-in CFRP Tubes Under Axial Compression[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(9): 1-9. doi: 10.13204/j.gyjzG22030410

Citation:

MOU Kun-ting, WEI Yang, WANG Gao-fei, DONG Feng-hui, ZHENG Kai-qi. Mechanical Properties of Double-Tube Seawater and Sea Sand Concrete Columns with Built-in CFRP Tubes Under Axial Compression[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(9): 1-9. doi: 10.13204/j.gyjzG22030410

Citation:

MOU Kun-ting, WEI Yang, WANG Gao-fei, DONG Feng-hui, ZHENG Kai-qi. Mechanical Properties of Double-Tube Seawater and Sea Sand Concrete Columns with Built-in CFRP Tubes Under Axial Compression[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(9): 1-9. doi: 10.13204/j.gyjzG22030410

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Mechanical Properties of Double-Tube Seawater and Sea Sand Concrete Columns with Built-in CFRP Tubes Under Axial Compression

doi: 10.13204/j.gyjzG22030410

College of Civil Engineering, Nanjing Forestry University, Nanjing 210037, China

Received Date: 2022-03-04
Available Online: 2023-02-06

Abstract

Abstract

In order to solve the corrosion problems caused by seawater and sea sand concrete in the engineering practice and enhance the seismic performance of structure, a novel structure called double-tube seawater and sea sand concrete columns with built-in CFRP tubes was proposed. Axial compression test was performed on 12 double-tube seawater and sea sand concrete columns with built-in CFRP tubes and 4 concrete-filled steel tube columns. The effect of the thickness of steel tube and the layers of CFRP tube was investigated. Test results indicated that the built-in CFRP tube could improve the bearing capacity and deformation capacity of the structure. The failure of double-tube seawater and sea sand concrete columns with built-in CFRP tubes was usually accompanied by the failure of one of built-in CFRP tubes, while the rest of CFRP tubes could still provide confinement and broke in turn during loading. Based on the theory of area equivalence and area segmentation, a model for ultimate load of double-tube seawater and sea sand concrete columns with built-in CFRP tubes was proposed. Finally, the prediction accuracy and dispersion of the formula were evaluated.
- built-in CFRP tube,
- seawater and sea sand concrete,
- steel tube,
- mechanical properties under axial compression,
- calculation model

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References(27)

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