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Strength degradation in curved fiber-reinforced polymer (FRP) bars used as concrete reinforcements
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Imjai, Thanongsak, Garcia, Reyes, Guadagnini, Maurizio and Pilakoutas, Kypros (2020) Strength degradation in curved fiber-reinforced polymer (FRP) bars used as concrete reinforcements. Polymers, 12 (8). e1653. doi:10.3390/polym12081653 ISSN 2073-4360.
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WRAP-Strength-degradation-curved-fiber-reinforced-polymer-concrete-Garcia-2020.pdf - Published Version - Requires a PDF viewer. Available under License Creative Commons Attribution 4.0. Download (984Kb) | Preview |
Official URL: https://doi.org/10.3390/polym12081653
Abstract
Steel reinforcements in concrete tend to corrode and this process can lead to structural damage. Fiber-reinforced polymer (FRP) reinforcements represent a viable alternative for structures exposed to aggressive environments and have many possible applications where superior corrosion resistance properties are required. The use of FRP rebars as internal reinforcements for concrete, however, is limited to specific structural elements and does not yet extend to the whole structure. The reason for this relates to the limited availability of curved or shaped reinforcing FRP elements on the market, as well as their reduced structural performance. This article presents a state-of-the art review on the strength degradation of curved FRP composites, and also assesses the performance of existing predictive models for the bend capacity of FRP reinforcements. Previous research has shown that the mechanical performance of bent portions of FRP bars significantly reduces under a multiaxial combination of stresses. Indeed, the tensile strength of bent FRP bars can be as low as 25% of the maximum tensile strength developed in a straight counterpart. In a significant number of cases, the current design recommendations for concrete structures reinforced with FRP were found to overestimate the bend capacity of FRP bars. A more accurate and practical predictive model based on the Tsai−Hill failure criteria is also discussed. This review article also identifies potential challenges and future directions of research for exploring the use of curved/shaped FRP composites in civil engineering applications.
| Item Type: | Journal Article | ||||||
|---|---|---|---|---|---|---|---|
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) | ||||||
| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||||
| SWORD Depositor: | Library Publications Router | ||||||
| Library of Congress Subject Headings (LCSH): | Fiber-reinforced plastics, Fiber-reinforced concrete, Strength of materials | ||||||
| Journal or Publication Title: | Polymers | ||||||
| Publisher: | MDPI | ||||||
| ISSN: | 2073-4360 | ||||||
| Official Date: | 24 July 2020 | ||||||
| Dates: |
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| Volume: | 12 | ||||||
| Number: | 8 | ||||||
| Article Number: | e1653 | ||||||
| DOI: | 10.3390/polym12081653 | ||||||
| Status: | Peer Reviewed | ||||||
| Publication Status: | Published | ||||||
| Access rights to Published version: | Open Access (Creative Commons) | ||||||
| Date of first compliant deposit: | 31 July 2020 | ||||||
| Date of first compliant Open Access: | 4 August 2020 | ||||||
| Related URLs: |
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