Abstract: More study is required to better understand the flexural behaviour and cracking performance of fiber-reinforced polymer (FRP) bars used in lightweight concrete (LWC) beams because there is a paucity of experimental research in this field. This article describes an experimental investigation that evaluated the flexural behaviour, cracking capability, and bond-dependent (Kb) properties of beams made of lightweight concrete. There are three thin concrete beams in all (one of them reinforced with steel bars as a reference beam and the other beams reinforced with GFR bars) measured 150 mm wide x 300 mm deep x 2000 mm long were constructed and tested up to failure in four-point bending over a clear span of 1800 mm. The test parameters were: (a) reinforcement type (Steel bars and GFRP bars), and (b) concrete cover (20 mm and 35 mm). The test results included information on the cracking behaviour, deflection, crack width, reinforcing strain, flexural capacity, and mechanism of failure. The experiment's findings showed that the GFRP-reinforced beams behaved linearly to cracking until concrete crushing caused them to fail. Additionally, the predicted moment capacities of the GFRP beams were computed using the strain-compatibility approach in the design standards. The outcomes showed that the experimental results and predictions had a good degree of agreement. According to the analysis of the kb factor, recommended Kb values for smooth GFRP bars are thus given as = 1.65 based on the experimental findings of the tested beams.
Keywords: Lightweight concrete; Beams; GFRP; Crack width; Deflection; Flexural behavior; Bond; Failure; Reinforcement ratio.
Title: Bond Behavior of GFRP-reinforced lightweight concrete beams
Author: Hala Mamdouh, Ahmed H. Ali, Nehal M. Ayash, Kareem A. M.
International Journal of Civil and Structural Engineering Research
ISSN 2348-7607 (Online)
Vol. 10, Issue 2, October 2022 - March 2023
Page No: 63-70
Research Publish Journals
Website: www.researchpublish.com
Published Date: 07-January-2023
