Study of Cyclic Performance and Design Method of UHPC-NSC Composite Pier
Publication: Journal of Structural Engineering
Volume 150, Issue 3
Abstract
The composite pier, which consists of ultra-high-performance concrete (UHPC) and normal strength concrete (NSC), is a promising option for practical engineering due to its remarkable mechanical performance. However, the cyclic behavior and seismic design mechanism of the composite pier have not been thoroughly investigated. This paper aims to study the cyclic performance of the composite pier by conducting cyclic tests on 10 specimens. The thickness of the UHPC tube, strength of reinforcement, spacing of stirrups, and other parameters are considered. The crack distribution, hysteretic response, and failure modes are observed and analyzed. Results show that the composite pier exhibits good crack-control ability, large bearing capacity, and effective energy dissipation. The expansion of the inner NSC may exacerbate the buckling of the UHPC tube, thus leading to more severe seismic damage. To further investigate the composite pier, a numerical model is established to analyze the optimal thickness of the UHPC tube. The ultimate state of the composite section is taken into consideration, and the upper and lower limits of the height of the compression zone are proposed. Based on the parametric analysis, a recommended range of the UHPC tube thickness is derived.
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Data Availability Statement
All data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
This work was supported by the National Natural Science Foundation of China (Grant Nos. U21A20154 and 52078436) and the Sichuan Science and Technology Program (Grant Nos. 2022JDRC0012, 2022NSFSC0455, and 2023YFG0064).
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 150 • Issue 3 • March 2024
Copyright
© 2024 American Society of Civil Engineers.
History
Received: Apr 12, 2023
Accepted: Nov 8, 2023
Published online: Jan 9, 2024
Published in print: Mar 1, 2024
Discussion open until: Jun 9, 2024
ASCE Technical Topics:
- Composite materials
- Concrete
- Cyclic tests
- Earthquake engineering
- Engineering fundamentals
- Engineering materials (by type)
- Geotechnical engineering
- High-performance concrete
- Hydraulic engineering
- Hydraulic structures
- Laboratory tests
- Material mechanics
- Material properties
- Materials engineering
- Piers
- Ports and harbors
- Seismic design
- Seismic tests
- Tests (by type)
- Thickness
- Water and water resources
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