Degradation of the EBR-CFRP strengthening system applied to reinforced concrete beams exposed to weathering
Abstract Little is known about the behavior and durability of strengthening systems applied on concrete substrata and the possible loss of performance due to the degradation of the intervening materials by the structure’s natural aging process and exposure of the externally strengthened elements to...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Instituto Brasileiro do Concreto (IBRACON)
2021-03-01
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| Series: | Revista IBRACON de Estruturas e Materiais |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1983-41952021000200214&tlng=en |
| _version_ | 1798019942152404992 |
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| author | Gláucia Maria Dalfré Guilherme Aris Parsekian Douglas da Costa Ferreira |
| author_facet | Gláucia Maria Dalfré Guilherme Aris Parsekian Douglas da Costa Ferreira |
| author_sort | Gláucia Maria Dalfré |
| collection | DOAJ |
| description | Abstract Little is known about the behavior and durability of strengthening systems applied on concrete substrata and the possible loss of performance due to the degradation of the intervening materials by the structure’s natural aging process and exposure of the externally strengthened elements to aggressive environments. In this context, the present work presents an experimental analysis of the behavior of reinforced concrete beams strengthened with Carbon Fiber Reinforced Polymer (CFRP), applied according to the Externally Bonded Reinforcement (EBR) technique, maintained in a laboratory environment (indoor and protected) or exposed to weathering (outdoor exposure). In addition, specimens of the intervenient materials were also molded and exposed to the same environmental conditions as the beams. The results indicate that weather-exposed epoxy adhesives present reductions up to 70% in their mechanical properties after exposure, while the CFRP composite properties remain similar. It was also found that the strengthening system provided 50% and 28% increments in the load-carrying capacity and stiffness of the elements, respectively. However, the tests conducted after 6 months of weathering exposure showed a 10% reduction in the load-carrying capacity of the strengthened elements. |
| first_indexed | 2024-04-11T16:49:50Z |
| format | Article |
| id | doaj.art-47e4a46dce9b4d85a13b7cca879aed18 |
| institution | Directory Open Access Journal |
| issn | 1983-4195 |
| language | English |
| last_indexed | 2024-04-11T16:49:50Z |
| publishDate | 2021-03-01 |
| publisher | Instituto Brasileiro do Concreto (IBRACON) |
| record_format | Article |
| series | Revista IBRACON de Estruturas e Materiais |
| spelling | doaj.art-47e4a46dce9b4d85a13b7cca879aed182022-12-22T04:13:28ZengInstituto Brasileiro do Concreto (IBRACON)Revista IBRACON de Estruturas e Materiais1983-41952021-03-0114210.1590/s1983-41952021000200008Degradation of the EBR-CFRP strengthening system applied to reinforced concrete beams exposed to weatheringGláucia Maria Dalfréhttps://orcid.org/0000-0003-3623-5103Guilherme Aris Parsekianhttps://orcid.org/0000-0002-5939-2032Douglas da Costa Ferreirahttps://orcid.org/0000-0002-5859-5559Abstract Little is known about the behavior and durability of strengthening systems applied on concrete substrata and the possible loss of performance due to the degradation of the intervening materials by the structure’s natural aging process and exposure of the externally strengthened elements to aggressive environments. In this context, the present work presents an experimental analysis of the behavior of reinforced concrete beams strengthened with Carbon Fiber Reinforced Polymer (CFRP), applied according to the Externally Bonded Reinforcement (EBR) technique, maintained in a laboratory environment (indoor and protected) or exposed to weathering (outdoor exposure). In addition, specimens of the intervenient materials were also molded and exposed to the same environmental conditions as the beams. The results indicate that weather-exposed epoxy adhesives present reductions up to 70% in their mechanical properties after exposure, while the CFRP composite properties remain similar. It was also found that the strengthening system provided 50% and 28% increments in the load-carrying capacity and stiffness of the elements, respectively. However, the tests conducted after 6 months of weathering exposure showed a 10% reduction in the load-carrying capacity of the strengthened elements.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1983-41952021000200214&tlng=enreinforced concrete beamsstrengtheningCFRPdegradationEBR technique |
| spellingShingle | Gláucia Maria Dalfré Guilherme Aris Parsekian Douglas da Costa Ferreira Degradation of the EBR-CFRP strengthening system applied to reinforced concrete beams exposed to weathering Revista IBRACON de Estruturas e Materiais reinforced concrete beams strengthening CFRP degradation EBR technique |
| title | Degradation of the EBR-CFRP strengthening system applied to reinforced concrete beams exposed to weathering |
| title_full | Degradation of the EBR-CFRP strengthening system applied to reinforced concrete beams exposed to weathering |
| title_fullStr | Degradation of the EBR-CFRP strengthening system applied to reinforced concrete beams exposed to weathering |
| title_full_unstemmed | Degradation of the EBR-CFRP strengthening system applied to reinforced concrete beams exposed to weathering |
| title_short | Degradation of the EBR-CFRP strengthening system applied to reinforced concrete beams exposed to weathering |
| title_sort | degradation of the ebr cfrp strengthening system applied to reinforced concrete beams exposed to weathering |
| topic | reinforced concrete beams strengthening CFRP degradation EBR technique |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1983-41952021000200214&tlng=en |
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