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A practical macro-mechanical model for the bend capacity of fibre-reinforced polymer bars
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Imjai, Thanongsak, Guadagnini, Maurizio, Pilakoutas, Kypros, Garcia, Reyes, Sukontasukkul, Piti and Limkatanyu, Suchart (2021) A practical macro-mechanical model for the bend capacity of fibre-reinforced polymer bars. Proceedings of the Institution of Civil Engineers - Structures and Buildings, 174 (10). p. 824. doi:10.1680/jstbu.19.00135 ISSN 0965-0911.
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WRAP-practical-macromechanical-based-model-bend-bars-Garcia-2020.pdf - Accepted Version - Requires a PDF viewer. Download (1148Kb) | Preview |
Official URL: https://doi.org/10.1680/jstbu.19.00135
Abstract
Bent fibre-reinforced polymer bars embedded in reinforced concrete elements resist lower forces than straight counterparts due to strength losses at the bend, and such losses are difficult to calculate. This paper reports on an investigation into the effect of section geometry and bond, which led to a new macro-mechanical model to calculate the bend capacity of fibre-reinforced polymer bars. The proposed model uses a Tsai-Hill failure criterion and accounts for factors known to influence the bend capacity of the bars. A section factor, ignored in existing models, also accounts for the strength degradation due to the change in geometry at the bent portion of the bar. The model was calibrated using a set of 80 tests found in the literature and performed by the authors. The results indicated that, compared to existing equations, the proposed model predicts the bend strength of bars more accurately, with an average prediction to experiment ratio of 1.0 and a standard deviation of 0.25. Following validation and verification, appropriate values for the model parameters are recommended for design. The proposed model can lead to more economic design, by up to 15%.
| Item Type: | Journal Article | |||||||||
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| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) T Technology > TH Building construction T Technology > TP Chemical technology |
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| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | |||||||||
| SWORD Depositor: | Library Publications Router | |||||||||
| Library of Congress Subject Headings (LCSH): | Fiber-reinforced plastics , Polymeric composites, Reinforced plastics, Composite materials , Concrete construction | |||||||||
| Journal or Publication Title: | Proceedings of the Institution of Civil Engineers - Structures and Buildings | |||||||||
| Publisher: | Thomas Telford | |||||||||
| ISSN: | 0965-0911 | |||||||||
| Official Date: | October 2021 | |||||||||
| Dates: |
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| Volume: | 174 | |||||||||
| Number: | 10 | |||||||||
| Page Range: | p. 824 | |||||||||
| DOI: | 10.1680/jstbu.19.00135 | |||||||||
| Status: | Peer Reviewed | |||||||||
| Publication Status: | Published | |||||||||
| Access rights to Published version: | Restricted or Subscription Access | |||||||||
| Date of first compliant deposit: | 31 March 2020 | |||||||||
| Date of first compliant Open Access: | 26 February 2021 | |||||||||
| RIOXX Funder/Project Grant: |
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