Residual Load-Carrying Capacity of Hybrid FRP-UHPC-Steel Double-Skin Tubular Column after Lateral Impact
Publication: Journal of Composites for Construction
Volume 28, Issue 5
Abstract
The hybrid fiber-reinforced polymer (FRP)–concrete–steel double-skin tubular column (DSTC) is an innovative composite member consisting of an outer FRP tube and an inner steel tube, with the space between them filled with concrete. The incorporation of ultrahigh-performance concrete (UHPC) in the DSTC yields numerous advantages over the DSTC with normal-strength concrete, particularly in terms of enhanced impact resistance. While the lateral impact behavior of UHPC DSTC has been investigated, its residual performance after lateral impact remains unexplored. To comprehend the postimpact behavior of UHPC DSTC, a series of specimens underwent lateral impact, followed by static axial compression. Additionally, intact specimens were subjected to static axial compression for comparative analysis. Subsequently, refined numerical models were developed and validated using the obtained test data. Detailed parametric studies were carried out to investigate the influences of key variables on the postimpact behavior of UHPC DSTCs. Finally, based on the ratio of residual midheight deflection to the column height, a prediction formula was proposed for the rapid damage evaluation of impacted UHPC DSTCs, and threshold values for different damage levels were suggested based on a defined damage index.
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Data Availability Statement
All data, models, or codes generated or used during the study are available from the corresponding author upon request.
Acknowledgments
The authors would like to acknowledge the financial support from the Natural Science Foundation of Jiangsu Province (No. BK20220986), and the Fundamental Research Funds for the Central Universities (No. B220201029). Also, the authors appreciate Mr. Jie Li for his help in conducting the static axial compression test.
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Published In
Journal of Composites for Construction
Volume 28 • Issue 5 • October 2024
Copyright
© 2024 American Society of Civil Engineers.
History
Received: Jul 21, 2023
Accepted: Apr 23, 2024
Published online: Jul 8, 2024
Published in print: Oct 1, 2024
Discussion open until: Dec 8, 2024
ASCE Technical Topics:
- Composite materials
- Concrete
- Design (by type)
- Engineering fundamentals
- Engineering materials (by type)
- Fiber reinforced composites
- Fiber reinforced concrete
- Fiber reinforced polymer
- Foundation design
- Foundations
- Geotechnical engineering
- High-performance concrete
- Hybrid methods
- Load bearing capacity
- Materials engineering
- Methodology (by type)
- Polymer
- Structural design
- Structural engineering
- Structural members
- Structural reliability
- Structural systems
- Synthetic materials
- Tubes (structure)
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