Simulation Analysis of Axial Compressive Properties of CFRP Reinforced Tape with Circumferential Hollowing Defects in Concrete-Filled Steel Tubular Stubs

DOI

10.2991/978-94-6463-932-2_2How to use a DOI?

Keywords

CFRP; Circumferential gap; axial compression short column; Simulation analysis; concrete-filled steel tube

Abstract

Carbon Reinforced Polymer Plastic demonstrates significant tensile properties that enhance the binding strength of concrete and effectively prolong the buckling resistance of metal tubes post-yielding. Consequently, it has found extensive application in the fields of engineering repair and reinforcement. For steel tubing filled with concrete composite structures with defects of circumferential voids, The extent to which carbon fiber reinforced polymer (CFRP) reinforcement can address the issues arising from void defects remains uncertain. In order to explore the performance of short columns made of steel tubes filled with concrete under axial compression strengthened with CFRP (carbon fiber sheet) with circumferential void defects, the performance of short columns made of steel tubes filled with concrete under axial compression strengthened with CFRP with circumferential void defects with void ratio of 1.1–2.2% is simulated and analyzed, and The impact of factors, for example, there is the void ratio. And there is the number of reinforcement layers on axial compression. Behavior is examined, a FEM is developed to facilitate the analysis of its operational mechanisms. Simulation outcomes reveal that an increase in the void ratio leads to a reduction in both the ultimate bearing capacity and the associated displacement of the structural member, thereby considerably diminishing its deformation capacity. Furthermore, when reinforced with carbon fiber reinforced polymer (CFRP), the ultimate bearing capacity of the specimen with voids demonstrates a significant enhancement in comparison to the specimen without voids, along with an improvement in ductility. With an increasing number of strengthening layers, the impact of CFRP on buckling conduct of the steel tube becomes increasingly significant, thereby offering enhanced circumferential support to inner concrete. Partially, CFRP contributes to the mitigation of ring deformation.

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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TY  - CONF
AU  - Shasha Liu
AU  - Yifei Xu
AU  - Jiale Bao
PY  - 2025
DA  - 2025/12/22
TI  - Simulation Analysis of Axial Compressive Properties of CFRP Reinforced Tape with Circumferential Hollowing Defects in Concrete-Filled Steel Tubular Stubs
BT  - Proceedings of the 2025 2nd International Conference on Civil Engineering Structures and Concrete Materials (CESCM 2025)
PB  - Atlantis Press
SP  - 4
EP  - 15
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-932-2_2
DO  - 10.2991/978-94-6463-932-2_2
ID  - Liu2025
ER  -