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Post-Earthquake Strengthening of RC Coupling Beams with GFRP Wrapping: Experimental Investigation

This research aims to address a post-earthquake urgent strengthening measure to enhance the residual seismic capacity of earthquake-damaged reinforced concrete wall structures with coupling beams. The study consists of a series of tests on half-scale prototype coupling beams with various detailing o...

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Autores principales: Eser, Namık, Töre, Erkan, Bal, İhsan Engin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10488740/
https://www.ncbi.nlm.nih.gov/pubmed/37687733
http://dx.doi.org/10.3390/ma16176040
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author Eser, Namık
Töre, Erkan
Bal, İhsan Engin
author_facet Eser, Namık
Töre, Erkan
Bal, İhsan Engin
author_sort Eser, Namık
collection PubMed
description This research aims to address a post-earthquake urgent strengthening measure to enhance the residual seismic capacity of earthquake-damaged reinforced concrete wall structures with coupling beams. The study consists of a series of tests on half-scale prototype coupling beams with various detailing options, including confined with reduced confinement, partially confined, and unconfined bundles, under cyclic loading conditions. The methodology employed involved subjecting the specimens to displacement-controlled reversal tests, and carefully monitoring their response using strain gauges and potentiometers. The main results obtained reveal that GFRP wrapping significantly enhances the seismic performance of earthquake-damaged coupling beams, even in cases where specimens experienced strength loss and main reinforcement rupture. The strengthened beams exhibit commendable ductility, maintaining high levels of deformation capacity, and satisfying the requirements of relevant seismic design codes. The significance of the study lies in providing valuable insights into the behavior and performance of damaged coupling beams and assessing the effectiveness of GFRP wrapping as a rapid and practical post-earthquake strengthening technique. The findings can be particularly useful for developing urgent post-earthquake strengthening strategies for high-rise buildings with structural walls. The method may be particularly useful for mitigating potential further damage in aftershocks and eventual collapse. In conclusion, this study represents a significant advancement in understanding the post-earthquake behaviors of coupling beams and provides valuable guidance for practitioners in making informed decisions regarding post-earthquake strengthening projects. The findings contribute to the overall safety and resilience of structures in earthquake-prone regions.
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spelling pubmed-104887402023-09-09 Post-Earthquake Strengthening of RC Coupling Beams with GFRP Wrapping: Experimental Investigation Eser, Namık Töre, Erkan Bal, İhsan Engin Materials (Basel) Article This research aims to address a post-earthquake urgent strengthening measure to enhance the residual seismic capacity of earthquake-damaged reinforced concrete wall structures with coupling beams. The study consists of a series of tests on half-scale prototype coupling beams with various detailing options, including confined with reduced confinement, partially confined, and unconfined bundles, under cyclic loading conditions. The methodology employed involved subjecting the specimens to displacement-controlled reversal tests, and carefully monitoring their response using strain gauges and potentiometers. The main results obtained reveal that GFRP wrapping significantly enhances the seismic performance of earthquake-damaged coupling beams, even in cases where specimens experienced strength loss and main reinforcement rupture. The strengthened beams exhibit commendable ductility, maintaining high levels of deformation capacity, and satisfying the requirements of relevant seismic design codes. The significance of the study lies in providing valuable insights into the behavior and performance of damaged coupling beams and assessing the effectiveness of GFRP wrapping as a rapid and practical post-earthquake strengthening technique. The findings can be particularly useful for developing urgent post-earthquake strengthening strategies for high-rise buildings with structural walls. The method may be particularly useful for mitigating potential further damage in aftershocks and eventual collapse. In conclusion, this study represents a significant advancement in understanding the post-earthquake behaviors of coupling beams and provides valuable guidance for practitioners in making informed decisions regarding post-earthquake strengthening projects. The findings contribute to the overall safety and resilience of structures in earthquake-prone regions. MDPI 2023-09-02 /pmc/articles/PMC10488740/ /pubmed/37687733 http://dx.doi.org/10.3390/ma16176040 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Eser, Namık
Töre, Erkan
Bal, İhsan Engin
Post-Earthquake Strengthening of RC Coupling Beams with GFRP Wrapping: Experimental Investigation
title Post-Earthquake Strengthening of RC Coupling Beams with GFRP Wrapping: Experimental Investigation
title_full Post-Earthquake Strengthening of RC Coupling Beams with GFRP Wrapping: Experimental Investigation
title_fullStr Post-Earthquake Strengthening of RC Coupling Beams with GFRP Wrapping: Experimental Investigation
title_full_unstemmed Post-Earthquake Strengthening of RC Coupling Beams with GFRP Wrapping: Experimental Investigation
title_short Post-Earthquake Strengthening of RC Coupling Beams with GFRP Wrapping: Experimental Investigation
title_sort post-earthquake strengthening of rc coupling beams with gfrp wrapping: experimental investigation
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10488740/
https://www.ncbi.nlm.nih.gov/pubmed/37687733
http://dx.doi.org/10.3390/ma16176040
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