Flexural Behaviour of Reinforced Concrete Beams Strengthened with a Composite Reinforcement Layer: BFRP Grid and ECC

Zheng, Yu-Zhou; Wang, Wen-Wei; Brigham, John C

doi:10.1016/j.conbuildmat.2016.04.038

Flexural Behaviour of Reinforced Concrete Beams Strengthened with a Composite Reinforcement Layer: BFRP Grid and ECC

Zheng, Yu-Zhou; Wang, Wen-Wei; Brigham, John C

Authors

Yu-Zhou Zheng

Wen-Wei Wang

John C Brigham

Abstract

In this paper, a new strengthening technique for reinforced concrete (RC) beams is proposed by combining Basalt fiber Reinforced Polymer (BFRP) grid and Engineered Cementitious Composites (ECC) as a composite reinforcement layer (CRL). Five RC beams externally bonded with the CRL at the soffit and one control RC beam were tested to investigate their flexural behaviour. The thickness of BFRP grids (i.e. 1 mm, 3 mm and 5 mm) and the bonded length of CRL (i.e. 400 mm, 450 mm and 500 mm) were selected as two main parameters in the test program, while the width and thickness of CRL were fixed approximately at 200 mm and 30 mm, respectively. The test results showed that there is no clear CRL debonding in the strengthened beams. The two final failure modes were concrete crushing or rupture of the BFRP grids, indicating that the proposed technique is effective in suppressing the debonding of externally bonded materials and fully utilizing the material strengths. An analytical model is also presented to predict the load-deflection responses of the strengthened beams, which was validated through comparisons with the test results.

Citation

Zheng, Y., Wang, W., & Brigham, J. C. (2016). Flexural Behaviour of Reinforced Concrete Beams Strengthened with a Composite Reinforcement Layer: BFRP Grid and ECC. Construction and Building Materials, 115, 424-437. https://doi.org/10.1016/j.conbuildmat.2016.04.038

Journal Article Type	Article
Acceptance Date	Apr 8, 2016
Online Publication Date	Apr 22, 2016
Publication Date	Jul 15, 2016
Deposit Date	Jun 30, 2016
Publicly Available Date	Apr 22, 2017
Journal	Construction and Building Materials
Print ISSN	0950-0618
Publisher	Elsevier
Peer Reviewed	Peer Reviewed
Volume	115
Pages	424-437
DOI	https://doi.org/10.1016/j.conbuildmat.2016.04.038

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http://creativecommons.org/licenses/by-nc-nd/4.0/

Copyright Statement
© 2016 This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/