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...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-07-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/13/13/2216 |
| _version_ | 1797527862316630016 |
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| author | Fengky Satria Yoresta Phan Viet Nhut Daiki Nakamoto Yukihiro Matsumoto |
| author_facet | Fengky Satria Yoresta Phan Viet Nhut Daiki Nakamoto Yukihiro Matsumoto |
| author_sort | Fengky Satria Yoresta |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-03-10T09:49:50Z |
| format | Article |
| id | doaj.art-6f2ce0f59a9546ac8ced8a50810d2912 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-10T09:49:50Z |
| publishDate | 2021-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-6f2ce0f59a9546ac8ced8a50810d29122023-11-22T02:49:03ZengMDPI AGPolymers2073-43602021-07-011313221610.3390/polym13132216Experimental Investigation on the Buckling Capacity of Angle Steel Strengthened at Both Legs Using VaRTM-Processed Unbonded CFRP LaminatesFengky Satria Yoresta0Phan Viet Nhut1Daiki Nakamoto2Yukihiro Matsumoto3Department of Architecture and Civil Engineering, Toyohashi University of Technology, Toyohashi 441-8580, Aichi, JapanDepartment of Architecture and Civil Engineering, Toyohashi University of Technology, Toyohashi 441-8580, Aichi, JapanDepartment of Architecture and Civil Engineering, Toyohashi University of Technology, Toyohashi 441-8580, Aichi, JapanDepartment of Architecture and Civil Engineering, Toyohashi University of Technology, Toyohashi 441-8580, Aichi, JapanStrengthening 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.https://www.mdpi.com/2073-4360/13/13/2216unbonded CFRPangle steelbucklingVaRTMstrengthening |
| spellingShingle | Fengky Satria Yoresta Phan Viet Nhut Daiki Nakamoto Yukihiro Matsumoto Experimental Investigation on the Buckling Capacity of Angle Steel Strengthened at Both Legs Using VaRTM-Processed Unbonded CFRP Laminates Polymers unbonded CFRP angle steel buckling VaRTM strengthening |
| 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 | unbonded CFRP angle steel buckling VaRTM strengthening |
| url | https://www.mdpi.com/2073-4360/13/13/2216 |
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