Shear Strengthening of Reinforced Concrete- Walls with Externally Bonded FRP Fabrics
During recent seismic events, it has become evident that thin reinforced concrete walls (TRCW) can present failures due to the lack of confinement and boundary elements because of their thickness, which only allows a reinforcing steel grid. These failures are characterized by out-of-plane instabilit...
| Autor: | |
|---|---|
| Formato: | tesis de maestría |
| Estado: | Versión publicada |
| Fecha de publicación: | 2020 |
| País: | Colombia |
| Recursos: | Escuela Colombiana de Ingeniería Julio Garavito |
| Repositorio: | Repositorio Institucional ECI |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio.escuelaing.edu.co:001/1360 |
| Acesso em linha: | https://catalogo.escuelaing.edu.co/cgi-bin/koha/opac-detail.pl?biblionumber=22571 https://repositorio.escuelaing.edu.co/handle/001/1360 |
| Access Level: | acceso abierto |
| Palavra-chave: | Reforzamiento externo Muro esbelto de concreto bandas de FRP GFRP, External Reinforcement Thin Concrete Walls FRP Fabrics |
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Shear Strengthening of Reinforced Concrete- Walls with Externally Bonded FRP FabricsOrtiz Polanco, Jesús David.Reforzamiento externoMuro esbelto de concretobandas de FRPGFRP,External ReinforcementThin Concrete WallsFRP FabricsGFRP,During recent seismic events, it has become evident that thin reinforced concrete walls (TRCW) can present failures due to the lack of confinement and boundary elements because of their thickness, which only allows a reinforcing steel grid. These failures are characterized by out-of-plane instabilities, flexural failures and shear failures. The last ones, brittle and sudden failures that could seriously compromise the stability of the structure. FRP reinforcements have shown in research around the world to have a great performance in different structural elements under different loads. This document presents the results of a research project in which the behavior of the shear strengthening of thin reinforced concrete walls using different external FRP fabrics schemes and systems was evaluated, analyzing 10 specimens; 5 low concrete strength resistance and 5 high resistance, with dimensions of 0.1 x 1.3 x 2.6 m (4 x 52 x 102 in) with shear reinforcement deficiency reinforced with 2 carbon fibers (CFRP) and 1 glass fiber (GFRP). The failure mode, the hysteretic response, the stiffness degradation, and the energy dissipation capacity were evaluated, showing significant improvements in the shear capacity for each specimen evaluated as well as differences in terms of the equations taken as a basis provided by the ACI 440.2 R - 17 for the calculation of the external reinforcement contribution and the experimental load capacity of each specimen.Durante eventos sísmicos recientes se ha evidenciado que los muros esbeltos de concreto reforzado pueden presentar fallas debido a la falta de confinamiento y elementos de borde producto de su espesor, que únicamente permite una parrilla de acero de refuerzo. Estas fallas están caracterizadas por inestabilidades fuera del plano, fallas por flexión y fallas por corte. Estas últimas, fallas súbitas y frágiles, podrían comprometer seriamente la estabilidad de la estructura. Los reforzamientos externos con bandas de polímeros reforzados con fibra (FRP) han demostrado en investigaciones alrededor del mundo tener un gran desempeño en diferentes elementos estructurales ante diferentes solicitaciones. En el presente documento se exponen los resultados de un proyecto de investigación en donde se evaluó el comportamiento de diferentes esquemas y sistemas de FRP como material de refuerzo a corte en muros esbeltos de concreto reforzado, analizando 10 muros; 5 con concreto de baja resistencia a la compresión y 5 de alta resistencia, de 0.1 x 1.3 x 2.6 m (4 x 52 x 102 in) con deficiencia de refuerzo cortante; reforzados externamente con 2 tipos de fibras de carbono (CFRP) y 1 tipo de fibra de vidrio (GFRP). Dentro del análisis se evaluó el modo de falla, la respuesta histerética, la degradación de rigidez y la capacidad de disipación de energía, mostrando mejoras significativas en la capacidad a cortante para cada uno de los reforzamientos externos considerados. De igual manera se encontraron diferencias en cuanto a las ecuaciones tomadas como base brindadas por el ACI 440.2R – 17 para el cálculo teórico del aporte del refuerzo y las capacidades experimentales.Escuela Colombiana de Ingeniería Julio Garavito2021-02-09T04:27:40Z2021-10-01T15:29:01Z2021-02-09T04:27:40Z2021-10-01T15:29:01Z2020Trabajo de grado - Maestríainfo:eu-repo/semantics/publishedVersionTextTextinfo:eu-repo/semantics/masterThesisapplication/pdfapplication/pdfapplication/pdfhttps://catalogo.escuelaing.edu.co/cgi-bin/koha/opac-detail.pl?biblionumber=22571https://repositorio.escuelaing.edu.co/handle/001/1360enginfo:eu-repo/semantics/openAccessreponame:Repositorio Institucional ECIinstname:Escuela Colombiana de Ingeniería Julio Garavitoinstacron:Escuela Colombiana de Ingeniería Julio Garavito2022-03-16T18:24:08Z |
| dc.title.none.fl_str_mv |
Shear Strengthening of Reinforced Concrete- Walls with Externally Bonded FRP Fabrics |
| title |
Shear Strengthening of Reinforced Concrete- Walls with Externally Bonded FRP Fabrics |
| spellingShingle |
Shear Strengthening of Reinforced Concrete- Walls with Externally Bonded FRP Fabrics Ortiz Polanco, Jesús David. Reforzamiento externo Muro esbelto de concreto bandas de FRP GFRP, External Reinforcement Thin Concrete Walls FRP Fabrics GFRP, |
| title_short |
Shear Strengthening of Reinforced Concrete- Walls with Externally Bonded FRP Fabrics |
| title_full |
Shear Strengthening of Reinforced Concrete- Walls with Externally Bonded FRP Fabrics |
| title_fullStr |
Shear Strengthening of Reinforced Concrete- Walls with Externally Bonded FRP Fabrics |
| title_full_unstemmed |
Shear Strengthening of Reinforced Concrete- Walls with Externally Bonded FRP Fabrics |
| title_sort |
Shear Strengthening of Reinforced Concrete- Walls with Externally Bonded FRP Fabrics |
| dc.creator.none.fl_str_mv |
Ortiz Polanco, Jesús David. |
| author |
Ortiz Polanco, Jesús David. |
| author_facet |
Ortiz Polanco, Jesús David. |
| author_role |
author |
| dc.subject.none.fl_str_mv |
Reforzamiento externo Muro esbelto de concreto bandas de FRP GFRP, External Reinforcement Thin Concrete Walls FRP Fabrics GFRP, |
| topic |
Reforzamiento externo Muro esbelto de concreto bandas de FRP GFRP, External Reinforcement Thin Concrete Walls FRP Fabrics GFRP, |
| description |
During recent seismic events, it has become evident that thin reinforced concrete walls (TRCW) can present failures due to the lack of confinement and boundary elements because of their thickness, which only allows a reinforcing steel grid. These failures are characterized by out-of-plane instabilities, flexural failures and shear failures. The last ones, brittle and sudden failures that could seriously compromise the stability of the structure. FRP reinforcements have shown in research around the world to have a great performance in different structural elements under different loads. This document presents the results of a research project in which the behavior of the shear strengthening of thin reinforced concrete walls using different external FRP fabrics schemes and systems was evaluated, analyzing 10 specimens; 5 low concrete strength resistance and 5 high resistance, with dimensions of 0.1 x 1.3 x 2.6 m (4 x 52 x 102 in) with shear reinforcement deficiency reinforced with 2 carbon fibers (CFRP) and 1 glass fiber (GFRP). The failure mode, the hysteretic response, the stiffness degradation, and the energy dissipation capacity were evaluated, showing significant improvements in the shear capacity for each specimen evaluated as well as differences in terms of the equations taken as a basis provided by the ACI 440.2 R - 17 for the calculation of the external reinforcement contribution and the experimental load capacity of each specimen. |
| publishDate |
2020 |
| dc.date.none.fl_str_mv |
2020 2021-02-09T04:27:40Z 2021-10-01T15:29:01Z 2021-02-09T04:27:40Z 2021-10-01T15:29:01Z |
| dc.type.none.fl_str_mv |
Trabajo de grado - Maestría info:eu-repo/semantics/publishedVersion Text Text info:eu-repo/semantics/masterThesis |
| format |
masterThesis |
| status_str |
publishedVersion |
| dc.identifier.none.fl_str_mv |
https://catalogo.escuelaing.edu.co/cgi-bin/koha/opac-detail.pl?biblionumber=22571 https://repositorio.escuelaing.edu.co/handle/001/1360 |
| url |
https://catalogo.escuelaing.edu.co/cgi-bin/koha/opac-detail.pl?biblionumber=22571 https://repositorio.escuelaing.edu.co/handle/001/1360 |
| dc.language.none.fl_str_mv |
eng |
| language |
eng |
| dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess |
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openAccess |
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application/pdf application/pdf application/pdf |
| dc.publisher.none.fl_str_mv |
Escuela Colombiana de Ingeniería Julio Garavito |
| publisher.none.fl_str_mv |
Escuela Colombiana de Ingeniería Julio Garavito |
| dc.source.none.fl_str_mv |
reponame:Repositorio Institucional ECI instname:Escuela Colombiana de Ingeniería Julio Garavito instacron:Escuela Colombiana de Ingeniería Julio Garavito |
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Escuela Colombiana de Ingeniería Julio Garavito |
| instacron_str |
Escuela Colombiana de Ingeniería Julio Garavito |
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Escuela Colombiana de Ingeniería Julio Garavito |
| reponame_str |
Repositorio Institucional ECI |
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Repositorio Institucional ECI |
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1825051861820899328 |
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15.198674 |