Abstract
In this paper, nonlinear finite element analysis (FEA) was used to investigate the behavior of fiber-reinforced polymer (FRP) retrofitted steel beams subjected to static and fatigue loadings. Under static loading, damaged and undamaged steel beams were retrofitted with carbon FRP (CFRP) to examine the effect of bond length and transverse anchorages on flexural behavior and failure modes. Under fatigue loading, damaged control, basalt FRP (BFRP), and aramid FRP (AFRP) retrofitted steel beams were analyzed to predict their fatigue life. The CFRP laminates provided an increase in the flexural capacity for the undamaged and damaged beams by approximately 1.7 and 3 times, respectively, as compared to their counterpart control beams. The effective FRP laminate bond length under static loading condition was found to be of the simply supported beam length. Furthermore, with the addition of anchorages, the flexural capacity was increased by 1.5 times under fatigue loading, a regression analysis was performed to generate new S-N curves, and formulas were proposed to predict the fatigue life of BFRP and AFRP strengthened steel beams.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
The authors would like to thank the graduate student, Mr. Aman Dhakal, for his help in the finite element modeling of the interface between the FRP plate and the steel beam.
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Published In
Practice Periodical on Structural Design and Construction
Volume 26 • Issue 1 • February 2021
Copyright
© 2020 American Society of Civil Engineers.
History
Received: Nov 3, 2019
Accepted: Jul 22, 2020
Published online: Sep 25, 2020
Published in print: Feb 1, 2021
Discussion open until: Feb 25, 2021
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