Proceedings of the 2025 8th International Conference on Traffic Transportation and Civil Architecture (ICTTCA 2025)

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Experimental Study of FRP-Steel-UHPC Composite Tube Confined Seawater Sea-Sand Concrete Columns Under Axial Compression

Authors
Lan Zeng1, Xuqi Liang1, Zurui Liu1, Hong Yuan2, *
1Key Laboratory of Green toughening and safety prevention and control of offshore structures, School of Mechanics and Construction Engineering, Jinan University, Guangzhou, 510632, P.R. China
2School of Architectural Engineering, Guangzhou Institute of Science and Technology, Guangzhou, Guangdong, 510540, P.R. China
*Corresponding author. Email: tyuanhong@jnu.edu.cn
Corresponding Author
Hong Yuan
Available Online 28 July 2025.
DOI
10.2991/978-94-6463-793-9_24How to use a DOI?
Keywords
Seawater and sea sand; Ultra-high performance concrete; FRP-steel composite structure; Axial compression characteristics
Abstract

To address the prevalent issues of low lateral resistance and ductility in corrosion-resistant FRP-confined members, as well as weak FRP-concrete interfacial bonding, this paper proposes a novel marine engineering structural component: FRP-steel-ultra-high performance concrete (UHPC) composite tube (FRP-steel-UHPC composite tube) confined seawater and sea-sand concrete (SSC) columns (FSU-SSCs). To investigate their axial compression performance, axial compression tests were conducted on five FSU-SSCs. The test results indicate that FRP-steel-UHPC composite tubes significantly enhances the axial compressive behavior of the confined SSC compared to FRP-steel or steel-UHPC composite tubes. Increasing FRP layers, steel tube thickness, and UHPC thickness improves load-bearing capacity and deformation of the composite columns, with multiple GFRP layers showing non-linear cumulative effects. The load-bearing capacity and the ultimate strain of FSU-SSC with a 30-mm UHPC shell respectively increased by 11.5% and 25.56% compared to that with a 20-mm UHPC shell.

Copyright
© 2025 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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Volume Title
Proceedings of the 2025 8th International Conference on Traffic Transportation and Civil Architecture (ICTTCA 2025)
Series
Atlantis Highlights in Engineering
Publication Date
28 July 2025
ISBN
978-94-6463-793-9
ISSN
2589-4943
DOI
10.2991/978-94-6463-793-9_24How to use a DOI?
Copyright
© 2025 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

Cite this article

risenwbib
TY  - CONF
AU  - Lan Zeng
AU  - Xuqi Liang
AU  - Zurui Liu
AU  - Hong Yuan
PY  - 2025
DA  - 2025/07/28
TI  - Experimental Study of FRP-Steel-UHPC Composite Tube Confined Seawater Sea-Sand Concrete Columns Under Axial Compression
BT  - Proceedings of the 2025 8th International Conference on Traffic Transportation and Civil Architecture (ICTTCA 2025)
PB  - Atlantis Press
SP  - 265
EP  - 274
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-793-9_24
DO  - 10.2991/978-94-6463-793-9_24
ID  - Zeng2025
ER  -