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Material compuesto epóxico/fique, como refuerzo externo en elementos de concreto sometidos a flexión
dc.rights.license | Atribución-NoComercial-SinDerivadas 4.0 Internacional |
dc.contributor.advisor | Luna Tamayo, Patricia |
dc.contributor.author | Beltrán Martínez, Oscar David |
dc.date.accessioned | 2023-05-19T20:08:31Z |
dc.date.available | 2023-05-19T20:08:31Z |
dc.date.issued | 2023-05-18 |
dc.identifier.uri | https://repositorio.unal.edu.co/handle/unal/83838 |
dc.description | ilustraciones, fotografías, gráficas, planos |
dc.description.abstract | En esta investigación se determinó la influencia de reforzar externamente vigas de concreto sometidas a flexión empleando un compuesto hecho con matriz epóxica y fibras de fique. Para esto se caracterizó mecánicamente la fibra de fique antes y después de ser sometida a un tratamiento alcalino. El tratamiento alcalino usado fue a base de hidróxido de sodio (NaOH), logrando con este procedimiento mejorar las propiedades mecánicas de la fibra de fique. Posteriormente, se caracterizó mecánicamente el tejido de fique, previamente sometido al tratamiento alcalino. Se fabricó una matriz epóxica, la cual fue sometida a ensayos de tensión para determinar sus propiedades mecánicas. Para la fabricación del compuesto epóxico/fique (EF) se emplearon dos tipos de tejidos, un tejido tupido (D) y un tejido ralo (MD), obteniendo mayores prestaciones mecánicas al emplear el tejido tupido, con un contenido de fibras de fique del 10 %, como fracción de peso. Se fabricaron vigas de concreto empleando dos tipos de resistencia a la compresión, una de 17 MPa y la otra de 24 MPa. Estas vigas fueron reforzadas externamente, en la cara inferior del elemento, empleando el compuesto EF. Posteriormente, fueron sometidas al ensayo a flexión de cuatro puntos para evaluar el comportamiento de las vigas reforzadas ante esfuerzos de flexión. Al reforzar estas vigas con el compuesto EF de observó que la resistencia a la flexión aumentó entre un 15 y 20 % para vigas con concreto de 17 MPa y un 10 % para las vigas hechas con concreto de 24 MPa. El módulo de elasticidad de las vigas reforzadas aumentó hasta un 20 % y las deflexiones se redujeron. Se propusieron unas expresiones teóricas para ser comparadas con los resultados obtenidos en el laboratorio, logrando precisión en las ecuaciones determinadas para la evaluación de esfuerzos en vigas compuestas, y una buena aproximación en la ecuación definida para la evaluación del momento nominal de la viga reforzada externamente con EF. (Texto tomado de la fuente) |
dc.description.abstract | In this research, the influence of externally reinforcing concrete beams subjected to bending using a composite made with an epoxy matrix and fique fibers was determined. For this, the fique fiber was mechanically characterized before and after being subjected to an alkaline treatment. The alkaline treatment used was based on sodium hydroxide (NaOH), achieving with this procedure to improve the mechanical properties of fique fiber. Subsequently, the fique fabric, previously subjected to alkaline treatment, was mechanically characterized. An epoxy matrix was manufactured, which was subjected to stress tests to determine its mechanical properties. For the manufacture of the epoxy/fique composite (EF) two types of fabrics were used, a dense fabric (D) and a sparse fabric (MD), obtaining greater mechanical performance when using the dense fabric, with a fique fiber content of 10%, as a weight fraction. Concrete beams were manufactured using two types of compressive strength, one of 17 MPa and the other of 24 MPa. These beams were externally reinforced, on the lower face of the element, using the EF compound. Subsequently, they were subjected to the four-point bending test to evaluate the behavior of the reinforced beams under bending stresses. When reinforcing these beams with the EF compound, it was observed that the flexural strength increased between 15 and 20% for beams with 17 MPa concrete and 10% for beams made with 24 MPa concrete. The elastic modulus of the reinforced beams increased up to 20% and deflections were reduced. Some theoretical expressions were proposed to be compared with the results obtained in the laboratory, achieving precision in the equations determined for the evaluation of forces in composite beams, and a good approximation in the equation defined for the evaluation of the nominal moment of the externally reinforced beam. with EF. |
dc.format.extent | 115 páginas |
dc.format.mimetype | application/pdf |
dc.language.iso | spa |
dc.publisher | Universidad Nacional de Colombia |
dc.rights | Derechos reservados al autor, 2023 |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ |
dc.subject.ddc | 690 - Construcción de edificios |
dc.title | Material compuesto epóxico/fique, como refuerzo externo en elementos de concreto sometidos a flexión |
dc.type | Trabajo de grado - Maestría |
dc.type.driver | info:eu-repo/semantics/masterThesis |
dc.type.version | info:eu-repo/semantics/acceptedVersion |
dc.publisher.program | Bogotá - Ingeniería - Maestría en Ingeniería - Estructuras |
dc.description.degreelevel | Maestría |
dc.description.degreename | Magíster en Ingeniería - Estructuras |
dc.description.researcharea | Materiales de construcción para estructuras |
dc.identifier.instname | Universidad Nacional de Colombia |
dc.identifier.reponame | Repositorio Institucional Universidad Nacional de Colombia |
dc.identifier.repourl | https://repositorio.unal.edu.co/ |
dc.publisher.faculty | Facultad de Ingeniería |
dc.publisher.place | Bogotá, Colombia |
dc.publisher.branch | Universidad Nacional de Colombia - Sede Bogotá |
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dc.rights.accessrights | info:eu-repo/semantics/openAccess |
dc.subject.lemb | Construcciones compuestas |
dc.subject.lemb | Composite construction |
dc.subject.lemb | Ingeniería de estructuras |
dc.subject.lemb | Structural engineering |
dc.subject.proposal | Fibras de fique |
dc.subject.proposal | Fique fibers |
dc.subject.proposal | fibras naturales |
dc.subject.proposal | natural fibers |
dc.subject.proposal | materiales compuestos |
dc.subject.proposal | composite materials |
dc.subject.proposal | matriz epóxica |
dc.subject.proposal | epoxy matrix |
dc.subject.proposal | refuerzo externo |
dc.subject.proposal | external reinforcement |
dc.subject.proposal | reforzamiento en vigas |
dc.subject.proposal | beam reinforcement |
dc.title.translated | Epoxy/fique composite material, as external reinforcement in concrete elements subjected to flexion |
dc.type.coar | http://purl.org/coar/resource_type/c_bdcc |
dc.type.coarversion | http://purl.org/coar/version/c_ab4af688f83e57aa |
dc.type.content | Text |
dc.type.redcol | http://purl.org/redcol/resource_type/TM |
oaire.accessrights | http://purl.org/coar/access_right/c_abf2 |
dcterms.audience.professionaldevelopment | Estudiantes |
dcterms.audience.professionaldevelopment | Investigadores |
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