Journal of Applied Science and Engineering

Published by Tamkang University Press


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Sayan Sirimontree1, Suraparb Keawsawasvong1, and Chanachai Thongchom  1

1Department of Civil Engineering, Thammasat School of Engineering, Thammasat University, Pathumthani 12120, Thailand

Received: January 21, 2021
Accepted: May 5, 2021
Publication Date: June 23, 2021

 Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.

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This research presents an experimental study on the flexural behavior of concrete beams reinforced with glass fiber-reinforced polymer (GFRP) bars and concrete beams reinforced with conventional steel reinforcements. A total of six full-scale beams (beam dimension of 150x250x2500 mm) reinforced with either steel or GFRP bars is investigated. The test variables include the tension reinforcement type (steel reinforcement grade [SD30 and SD40], GFRP bars). The flexural behavior including the load-deflection relationship, the flexural capacity, the stiffness, and mode of failure is investigated under a four-point loading test. The experimental results show that the maximum load of concrete reinforced with steel bars tended to increase as the steel strength increased. The maximum load of the concrete beams reinforced with GFRP bars was higher than the beams reinforced with steel bars up to 98%. However, the stiffness of the concrete beams reinforced with GFRP bars reduced when compared to the ones reinforced with steel bars.

Keywords: Concrete beams, Flexural behavior, Flexural strength, Composite beams, GFRP bar


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