Axial Compression Behavior of RC Columns Strengthened with SMA/CFRP

Ruirong Wan; Xuhua Liang; Yifeng Deng; Chunling Lu

doi:10.2991/978-94-6463-856-1_25

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Axial Compression Behavior of RC Columns Strengthened with SMA/CFRP

Authors

Ruirong Wan¹, Xuhua Liang¹, Yifeng Deng¹, Chunling Lu¹^{, *}

¹Guangxi Key Laboratory of Green Building Materials and Construction Industrialization, Guilin University of Technology, Guilin, China, 541004

^*Corresponding author. Email: 2000013@glut.edu.cn

Corresponding Author

Chunling Lu

Available Online 22 September 2025.

DOI: 10.2991/978-94-6463-856-1_25 How to use a DOI?
Keywords: Shape Memory Alloy; CFRP; Composite material reinforcement; Axial Load-Bearing Capacity
Abstract: A novel prestressed NiTi-SMA/CFRP composite material was developed by utilizing the shape memory effect and super-elasticity of NiTi-SMA wires to apply prestress to the CFRP layer, and used to strengthen RC circular columns. Axial compression tests were conducted on one control column and four composite-strengthened columns, considering the number of SMA wires and the wrapping spacing as variables. The axial compression performance of each specimen was analyzed. Results show that this strengthening method effectively improved the failure mode and significantly enhanced both the initial stiffness and peak load capacity. This improvement is attributed to the recovery stress generated by thermally activated NiTi-SMA, which imparts prestress to the CFRP layer, providing continuous circumferential confinement that restricted concrete cracking and expansion, thereby improving the axial performance. Furthermore, the loading process was divided into three stages. It was observed that the SMA wires, as the weak component within the composite layer, fractured progressively during loading, contributing to the favorable ductility of the specimens. This study provides experimental evidence and practical insights for the application of NiTi-SMA/CFRP composite materials in strengthening RC columns.
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 International Conference on Resilient City and Safety Engineering (ICRCSE 2025)
Series: Advances in Engineering Research
Publication Date: 22 September 2025
ISBN: 978-94-6463-856-1
ISSN: 2352-5401
DOI: 10.2991/978-94-6463-856-1_25 How to use a DOI?
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

ris enw bib

TY  - CONF
AU  - Ruirong Wan
AU  - Xuhua Liang
AU  - Yifeng Deng
AU  - Chunling Lu
PY  - 2025
DA  - 2025/09/22
TI  - Axial Compression Behavior of RC Columns Strengthened with SMA/CFRP
BT  - Proceedings of the 2025 International Conference on Resilient City and Safety Engineering (ICRCSE 2025)
PB  - Atlantis Press
SP  - 260
EP  - 270
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-856-1_25
DO  - 10.2991/978-94-6463-856-1_25
ID  - Wan2025
ER  -

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