Flexural Behavior of Steel Fiber–Reinforced Lightweight Aggregate Concrete Beams Reinforced with Glass Fiber–Reinforced Polymer Bars
Publication: Journal of Composites for Construction
Volume 23, Issue 2
Abstract
Nine beams reinforced with glass fiber-reinforced polymer (GFRP) bars and one reinforced with steel rebars fabricated using high-strength lightweight aggregate concrete (HSLC) were tested under four-point bending with different steel fiber contents, reinforcement ratios, and bar diameters to investigate their flexural strength and serviceability performance. The test results showed that specimens with steel fibers exhibited a lower deflection and a higher load-carrying capacity. The reinforcement ratio significantly affected serviceability performance, but bar diameter had a marginal effect. Generally, at service-load levels, the specimens exhibited acceptable midspan deflections but greater crack widths compared to the limits recommended by the codes. The experimental ultimate strengths, midspan deflections, and crack widths were used to assess the accuracy of prediction equations in standards in the US, China, and Canada. Rational deflection models for GFRP-reinforced normal weight concrete (NWC) beams were proposed based on the results from the available literature and were modified by introducing two correction factors of 0.85 and 1.35 for the GFRP-reinforced lightweight aggregate concrete (LC) and steel fiber-reinforced lightweight aggregate concrete (SFLC) beams, respectively.
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Acknowledgments
The authors would like to express their gratitude and sincere appreciation for the financial support received from the National Natural Science Foundation of China (Grant Nos. 51578072 and 51708036), and the Natural Science Foundation of Shaanxi Province (Grant Nos. 2016JM5070 and 2017JQ5092).
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Published In
Journal of Composites for Construction
Volume 23 • Issue 2 • April 2019
Copyright
©2018 American Society of Civil Engineers.
History
Received: Jan 10, 2018
Accepted: Aug 21, 2018
Published online: Dec 21, 2018
Published in print: Apr 1, 2019
Discussion open until: May 21, 2019
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