FRP Strengthening of Precast Prestressed Concrete Piles for Enhanced Integrity under Driving Impact
Publication: Practice Periodical on Structural Design and Construction
Volume 28, Issue 4
Abstract
In this study, a novel solution is proposed to locally strengthen precast prestressed concrete (PPC) driven piles by wrapping them with glass fiber reinforced polymer (GFRP) composites at the end regions. To investigate the feasibility of the proposed solution, five full-scale square PPC piles were manufactured, among which two were strengthened with externally bonded bidirectional GFRP wraps at both ends. All piles were then driven in a sandy soil in a project site using a diesel hammer, while the driving-induced stresses were monitored using a pile driving analyzer system. Direct measurements of the tip strain at each hammer blow were also obtained by using a wireless embedded data collector technique. A static pile load test was also conducted on one of the piles. The field test results showed that the proposed GFRP-wrapping had no negative effect on the skin friction resistance of the PPC piles along their strengthened region. A close inspection of the exhumed piles also revealed that the pile’s tip remained intact during driving with no debonding between the GFRP wrap and the concrete substrate, demonstrating the great potential of the proposed strengthening solution in maintaining the integrity of the PPC piles during driving.
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Data Availability Statement
The experimental data generated and postprocessed in this study is available from the authors upon reasonable request.
Acknowledgments
The authors gratefully acknowledge the financial support provided by the California Department of Transportation through research Grant No. 65A0737. Support from QuakeWrap, Inc., is also acknowledged for the FRP materials provided for this research. Moreover, the authors acknowledge the support of Smart Structures, Inc., Kie-Con, Inc., Foundation Constructors, Inc., and GRL Engineers, Inc. Assistance from graduate researchers Xun Wang and Brendan Grayson-Wallace at UC Davis was also appreciated during the specimen preparation. The opinions and findings presented in this paper are those of the authors alone and do not necessarily represent the views of the sponsoring agency. Last, all commercial product names mentioned in this paper are only provided for the sake of factual accuracy and should not necessarily be interpreted as an endorsement of the products or systems utilized.
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Information & Authors
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Published In
Practice Periodical on Structural Design and Construction
Volume 28 • Issue 4 • November 2023
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Nov 21, 2022
Accepted: Jun 22, 2023
Published online: Aug 11, 2023
Published in print: Nov 1, 2023
Discussion open until: Jan 11, 2024
ASCE Technical Topics:
- Concrete
- Concrete piles
- Driven piles
- Engineering materials (by type)
- Fiber reinforced concrete
- Fiber reinforced polymer
- Foundations
- Geotechnical engineering
- Material mechanics
- Material properties
- Materials engineering
- Pile driving
- Pile foundations
- Pile tests
- Piles
- Polymer
- Precast concrete
- Strength of materials
- Synthetic materials
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