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A practical method for determining shear crack induced deformation in FRP RC beams
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Imjai, Thanongsak, Guadagnini, Maurizio, Garcia, Reyes and Pilakoutas, Kypros (2016) A practical method for determining shear crack induced deformation in FRP RC beams. Engineering Structures, 126 . pp. 353-364. doi:10.1016/j.engstruct.2016.08.007 ISSN 0141-0296.
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Official URL: http://dx.doi.org/10.1016/j.engstruct.2016.08.007
Abstract
This article proposes a practical semi-empirical method for determining shear crack-induced deformations in Glass Fibre Reinforced Polymer (GFRP) Reinforced Concrete (RC) beams. Current design guidelines neglect shear and shear crack-induced deformations in the calculation of deflections of GFRP RC beams. However, shear-induced deformations can be up to 30% of the total beam deflection due to the lower stiffness of GFRP bars compared to steel. To calculate the component of deflection due to shear action and crack opening, the proposed model uses a ‘single fictitious inclined crack’ with a width equal to the sum of the individual effective shear crack widths. Twelve shear tests were conducted on six RC beams reinforced internally with GFRP bars considering different reinforcement types and test parameters. The additional deformation due to shear cracks calculated by the proposed model is then used to predict the overall deformations of such beams up to failure. It is shown that, in comparison to current design guidelines, the proposed model predicts more accurately the total deflection of FRP RC beams at both service and ultimate loads. This article contributes towards the development of more accurate models to assess the overall shear deflection behaviour of FRP RC beams so as to balance the performance, serviceability and economic viability of structures.
| Item Type: | Journal Article | |||||||||
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| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) | |||||||||
| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | |||||||||
| Library of Congress Subject Headings (LCSH): | Reinforced concrete construction -- Cracking, Glass-reinforced plastics, Fiber-reinforced plastics, Shear (Mechanics), Deformations (Mechanics), Concrete beams -- Testing | |||||||||
| Journal or Publication Title: | Engineering Structures | |||||||||
| Publisher: | Elsevier Science Ltd. | |||||||||
| ISSN: | 0141-0296 | |||||||||
| Official Date: | 1 November 2016 | |||||||||
| Dates: |
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| Volume: | 126 | |||||||||
| Page Range: | pp. 353-364 | |||||||||
| DOI: | 10.1016/j.engstruct.2016.08.007 | |||||||||
| Status: | Peer Reviewed | |||||||||
| Publication Status: | Published | |||||||||
| Access rights to Published version: | Restricted or Subscription Access | |||||||||
| Date of first compliant deposit: | 7 December 2018 | |||||||||
| Date of first compliant Open Access: | 11 December 2018 | |||||||||
| RIOXX Funder/Project Grant: |
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