Cyclic Compressive Behavior and Load-Strain Model of FRP-ECC-HSC Composite Columns
Publication: Journal of Structural Engineering
Volume 149, Issue 6
Abstract
An innovative composite column, which consists of a high strength concrete (HSC) core, engineered cementitious composites (ECC) ring, and fiber-reinforced polymer (FRP) tube, has recently been developed and subjected to monotonic axial compression testing by the authors. In this study, the cyclic compressive behavior of this proposed FRP-ECC-HSC composite column was examined. Test parameters, including HSC core strength, FRP tube thickness, and ECC ring thickness, were investigated. Typical failure modes, dilation behavior, and axial load versus axial strain behavior were discussed and analyzed. It was found that the FRP-ECC-HSC composite columns exhibited improved deformability, compared with the counterpart traditional FRP-confined HSC columns, with the ultimate axial compressive strain increased by 0.7%–69.1% for the tested specimens. Meanwhile, the ultimate axial strain for cyclically loaded specimens is larger than that for monotonically loaded specimens in general, indicating a delayed column failure. Cyclic axial load-axial strain models, including the envelope model, unloading and reloading models, plastic strain equation, and stress deterioration equation, were proposed to predict the cyclic compressive behavior of the tested specimens. The proposed model was verified with the test results and exhibited good performance.
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Data Availability Statement
Some or all data, models, or codes that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
The research presented in this paper was supported by the Research Grants Council of the Hong Kong Special Administrative Region, China—Theme-Based Research Scheme (Project No. T22-502/18-R).
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 149 • Issue 6 • June 2023
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Jul 13, 2022
Accepted: Jan 23, 2023
Published online: Mar 16, 2023
Published in print: Jun 1, 2023
Discussion open until: Aug 16, 2023
ASCE Technical Topics:
- Axial forces
- Axial loads
- Columns
- Composite columns
- Composite materials
- Compressive strength
- Continuum mechanics
- Cyclic strength
- Dynamics (solid mechanics)
- Engineering materials (by type)
- Engineering mechanics
- Fiber reinforced polymer
- Forces (type)
- Material mechanics
- Material properties
- Materials engineering
- Polymer
- Solid mechanics
- Static loads
- Statics (mechanics)
- Strength of materials
- Structural engineering
- Structural members
- Structural systems
- Synthetic materials
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