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Numerical investigation of various techniques for strengthening the external RC frame connection

Numerical investigation of various techniques for strengthening the external RC frame connection This research presents a theoretical investigation into strengthening the external RC frame connection. A connection is a critical point in the structure due to the combination of cracks and the greatest shear–flexure stress, thereby leading to failure. This study was conducted to investigate the effectiveness of strengthening techniques for improving the RC frame connection and avoiding or delaying failure. FEA (ABAQUS) was employed to assess the influence of various parameters on connection behavior, including the number of GFRP–CFRP layers, the variable thickness of steel plates, and ferro-cement with different diameters of expanded wire mesh. Results were analyzed and contrasted against previous research findings. The results highlighted that utilizing a single layer of CFRP provides greater connection strength than GFRP. Furthermore, the optimized thickness of steel plate in this case is 6 mm. Additionally, ferro-cement with 1 mm thick wire mesh improves resistance by 41%. Moreover, through the utilization of a single layer of CFRP, two layers of GFRP, and a 6 mm-thick steel plate, stresses and failure are transferred from the connection to the beam, resulting in the avoidance of catastrophic failure. Despite the fact that ferro-cement is less expensive, the study recommended utilizing ferro-cement laminate with expanded wire mesh as it enhances ductility and resistance. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Asian Journal of Civil Engineering Springer Journals

Numerical investigation of various techniques for strengthening the external RC frame connection

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References (10)

Publisher
Springer Journals
Copyright
Copyright © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
ISSN
1563-0854
eISSN
2522-011X
DOI
10.1007/s42107-023-00759-2
Publisher site
See Article on Publisher Site

Abstract

This research presents a theoretical investigation into strengthening the external RC frame connection. A connection is a critical point in the structure due to the combination of cracks and the greatest shear–flexure stress, thereby leading to failure. This study was conducted to investigate the effectiveness of strengthening techniques for improving the RC frame connection and avoiding or delaying failure. FEA (ABAQUS) was employed to assess the influence of various parameters on connection behavior, including the number of GFRP–CFRP layers, the variable thickness of steel plates, and ferro-cement with different diameters of expanded wire mesh. Results were analyzed and contrasted against previous research findings. The results highlighted that utilizing a single layer of CFRP provides greater connection strength than GFRP. Furthermore, the optimized thickness of steel plate in this case is 6 mm. Additionally, ferro-cement with 1 mm thick wire mesh improves resistance by 41%. Moreover, through the utilization of a single layer of CFRP, two layers of GFRP, and a 6 mm-thick steel plate, stresses and failure are transferred from the connection to the beam, resulting in the avoidance of catastrophic failure. Despite the fact that ferro-cement is less expensive, the study recommended utilizing ferro-cement laminate with expanded wire mesh as it enhances ductility and resistance.

Journal

Asian Journal of Civil EngineeringSpringer Journals

Published: Jan 1, 2024

Keywords: RC frame connection; Strengthening; CFRP–GFRP layers; Steel plates; Ferro-cement; ABAQUS

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