Edge and Crack-Induced Debonding Analysis of FRP-Strengthened Concrete Beams Using Innovative Beam Finite Elements
Publication: Journal of Engineering Mechanics
Volume 147, Issue 12
Abstract
In order to analyze the edge debonding and intermediate flexural crack–induced debonding of fiber-reinforced polymer (FRP)-strengthened concrete beams, several innovative beam finite elements were developed in this paper. The proposed elements were capable of modeling the concrete, adhesive layer, and FRP sheet in one macroscopic element. The explicit formulations of the proposed element stiffness matrices were given to simulate the adhesive layer in different loading stages. Comparisons against several numerical examples available in the literature were given to validate the proposed elements. The effects of the FRP tapering ends, load, and crack location on the interfacial shear stress within adhesive layers were effectively investigated using the proposed elements. It was found that the proposed elements could conveniently predict the edge and flexural crack–induced debonding behavior of FRP-strengthened beams with accuracy and computational efficiency.
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Data Availability Statement
All data, models, or code generated or used during the study are available from the corresponding author by request.
Acknowledgments
Rongqiao Xu is supported by the National Natural Science Foundation of China (Nos. 11172266 and 51478422, 11872336, and 12072097). Guannan Wang is supported by the National Natural Science Foundation of China (No. 12002303) and Fundamental Research Funds for the Central Universities (2020QNA4016). This work is also supported by the Center for Balance Architecture, Zhejiang University.
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Published In
Journal of Engineering Mechanics
Volume 147 • Issue 12 • December 2021
Copyright
© 2021 American Society of Civil Engineers.
History
Received: Jan 9, 2021
Accepted: Aug 26, 2021
Published online: Oct 8, 2021
Published in print: Dec 1, 2021
Discussion open until: Mar 8, 2022
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