Repair Method and Finite Element Analysis for Corroded Gusset Plate Connections Bonded to CFRP Sheets
Publication: Journal of Structural Engineering
Volume 147, Issue 1
Abstract
In steel truss bridges, severe damage due to corrosion at gusset plate connections has been widely reported. This study investigated the effectiveness of a repair method using carbon-fiber-reinforced plastic (CFRP) sheets for corroded gusset plate connections. Loading tests were conducted with a model approximately 50% of the size of actual gusset plate connections and a corrosion level of approximately 50% of the gusset plate thickness. Further, loading tests were carried out by varying the area, direction, and location of the bonded CFRP sheets. Results showed that the proposed repair method recovered the load-carrying capacity and improved the deformation performance of the corroded gusset plate connections. Three-dimensional finite element (FE) analyses, which considered the nonlinear properties of materials, anisotropic performance of CFRP sheets, and bond-slip model of the polyurea putty layer inserted between the corroded gusset plate and CFRP sheets, were implemented to validate the experimental results. By varying the bond-slip properties of the polyurea putty layer within the fluctuation range of measured data, this study accurately reproduced the experimental results and clarified the polyurea putty layer’s influence on the load-carrying capacity, deformation performance, and failure behavior of the corroded gusset plate connections bonded to CFRP sheets.
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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 research work described in this paper was partially supported by the Kajima Research Foundation. The authors would like to express their sincere gratitude for the support.
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Published In
Journal of Structural Engineering
Volume 147 • Issue 1 • January 2021
Copyright
© 2020 American Society of Civil Engineers.
History
Received: Feb 21, 2020
Accepted: Jul 22, 2020
Published online: Oct 27, 2020
Published in print: Jan 1, 2021
Discussion open until: Mar 27, 2021
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