Cargando…

Experimental Investigation on the Buckling Capacity of Angle Steel Strengthened at Both Legs Using VaRTM-Processed Unbonded CFRP Laminates

Strengthening steel structures by using carbon fiber reinforced polymer (CFRP) laminates showed a growth trend in the last several years. A similar strengthening technique, known as adhesive bonding, has also been adopted. This paper presented a promising alternative for strengthening steel members...

Descripción completa

Detalles Bibliográficos
Autores principales: Yoresta, Fengky Satria, Nhut, Phan Viet, Nakamoto, Daiki, Matsumoto, Yukihiro
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8272153/
https://www.ncbi.nlm.nih.gov/pubmed/34279365
http://dx.doi.org/10.3390/polym13132216
_version_ 1783721158752862208
author Yoresta, Fengky Satria
Nhut, Phan Viet
Nakamoto, Daiki
Matsumoto, Yukihiro
author_facet Yoresta, Fengky Satria
Nhut, Phan Viet
Nakamoto, Daiki
Matsumoto, Yukihiro
author_sort Yoresta, Fengky Satria
collection PubMed
description Strengthening steel structures by using carbon fiber reinforced polymer (CFRP) laminates showed a growth trend in the last several years. A similar strengthening technique, known as adhesive bonding, has also been adopted. This paper presented a promising alternative for strengthening steel members against buckling by using vacuum-assisted resin transfer molding (VaRTM)-processed unbonded CFRP laminates. A total of thirteen slender angle steel members (L65x6), including two control specimens, were prepared and experimentally tested. The specimens were strengthened only at both legs and were allowed to buckle on their weak axes. The test showed that the unbonded CFRP strengthening successfully increased the buckling capacity of the angle steel. The strengthening effect ranged from 7.12% to 69.13%, depending on various parameters (i.e., number of CFRP layers, CFRP length, and angle steel’s slenderness ratio). Flexural stiffness of the CFRP governed the failure modes in terms of location of plastic hinge and direction of buckling curvature.
format Online
Article
Text
id pubmed-8272153
institution National Center for Biotechnology Information
language English
publishDate 2021
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-82721532021-07-11 Experimental Investigation on the Buckling Capacity of Angle Steel Strengthened at Both Legs Using VaRTM-Processed Unbonded CFRP Laminates Yoresta, Fengky Satria Nhut, Phan Viet Nakamoto, Daiki Matsumoto, Yukihiro Polymers (Basel) Article Strengthening steel structures by using carbon fiber reinforced polymer (CFRP) laminates showed a growth trend in the last several years. A similar strengthening technique, known as adhesive bonding, has also been adopted. This paper presented a promising alternative for strengthening steel members against buckling by using vacuum-assisted resin transfer molding (VaRTM)-processed unbonded CFRP laminates. A total of thirteen slender angle steel members (L65x6), including two control specimens, were prepared and experimentally tested. The specimens were strengthened only at both legs and were allowed to buckle on their weak axes. The test showed that the unbonded CFRP strengthening successfully increased the buckling capacity of the angle steel. The strengthening effect ranged from 7.12% to 69.13%, depending on various parameters (i.e., number of CFRP layers, CFRP length, and angle steel’s slenderness ratio). Flexural stiffness of the CFRP governed the failure modes in terms of location of plastic hinge and direction of buckling curvature. MDPI 2021-07-05 /pmc/articles/PMC8272153/ /pubmed/34279365 http://dx.doi.org/10.3390/polym13132216 Text en © 2021 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
Yoresta, Fengky Satria
Nhut, Phan Viet
Nakamoto, Daiki
Matsumoto, Yukihiro
Experimental Investigation on the Buckling Capacity of Angle Steel Strengthened at Both Legs Using VaRTM-Processed Unbonded CFRP Laminates
title Experimental Investigation on the Buckling Capacity of Angle Steel Strengthened at Both Legs Using VaRTM-Processed Unbonded CFRP Laminates
title_full Experimental Investigation on the Buckling Capacity of Angle Steel Strengthened at Both Legs Using VaRTM-Processed Unbonded CFRP Laminates
title_fullStr Experimental Investigation on the Buckling Capacity of Angle Steel Strengthened at Both Legs Using VaRTM-Processed Unbonded CFRP Laminates
title_full_unstemmed Experimental Investigation on the Buckling Capacity of Angle Steel Strengthened at Both Legs Using VaRTM-Processed Unbonded CFRP Laminates
title_short Experimental Investigation on the Buckling Capacity of Angle Steel Strengthened at Both Legs Using VaRTM-Processed Unbonded CFRP Laminates
title_sort experimental investigation on the buckling capacity of angle steel strengthened at both legs using vartm-processed unbonded cfrp laminates
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8272153/
https://www.ncbi.nlm.nih.gov/pubmed/34279365
http://dx.doi.org/10.3390/polym13132216
work_keys_str_mv AT yorestafengkysatria experimentalinvestigationonthebucklingcapacityofanglesteelstrengthenedatbothlegsusingvartmprocessedunbondedcfrplaminates
AT nhutphanviet experimentalinvestigationonthebucklingcapacityofanglesteelstrengthenedatbothlegsusingvartmprocessedunbondedcfrplaminates
AT nakamotodaiki experimentalinvestigationonthebucklingcapacityofanglesteelstrengthenedatbothlegsusingvartmprocessedunbondedcfrplaminates
AT matsumotoyukihiro experimentalinvestigationonthebucklingcapacityofanglesteelstrengthenedatbothlegsusingvartmprocessedunbondedcfrplaminates