Simulación del proceso de fractura de estructuras de concreto simple, con el modelo de fisura distribuida rotante en el marco del método de los elementos finitos.

dc.contributorLinero Segrera, Dorian Luísspa
dc.contributorEstrada Mejia, Martínspa
dc.contributor.authorTamasco Sandoval, Juan Carlosspa
dc.date.accessioned2020-03-30T06:20:55Zspa
dc.date.available2020-03-30T06:20:55Zspa
dc.date.issued2019-07-20spa
dc.description.abstractEl modelo constitutivo de fisura distribuida rotante, permite representar el comportamiento de materiales cuasi--frágiles como el concreto simple que se encuentran sometidos a esfuerzos predominantemente de tensión. En este trabajo se desarrolla, implementa y valida dicho modelo en el marco de los elementos finitos, considerando un estado plano de esfuerzos. El modelo propuesto por Jirásek 2011, fue implementado en el programa de análisis no lineal HYPLAS, considerando tres leyes de ablandamiento diferentes y un ancho de banda variable, que es función del tamaño del elemento finito en la dirección normal a la fisura. Se simularon tres vigas de concreto simple sometidas a flexión y cortante ensayadas experimentalmente por otros autores. El primer ensayo muestra un modo I de fractura, mientras que el segundo y tercero presentan un modo mixto. La respuesta mecánica y la trayectoria de fisuración calculada con el modelo implementado, muestra gran similitud con los resultados experimentales. Con el modelo de fisura distribuida rotante, se logró modelar adecuadamente problemas donde el modo predominante de fallo es el modo I, y también problemas donde el modo I y II son quienes gobiernan el comportamiento del sólido. Lo anterior indica el potencial del modelo, ya que su formulación esta hecha para considerar solamente el modo I de fallo, sin embargo, la suposición de rotación de los ejes locales de la fisura permite que modelos mixtos puedan también ser modelados. The smeared crack rotating model, allows to simulate the behaviour of quasi--brittle materials like the plain concrete under tension stress. This thesis shows the development, implementation and validation of this model under the scope of the finite element method, for a plain stress condition. The constitutive model proposed by Jirásek 2011, was implemented in a non--linear analysis program named HYPLAS. In the modelation, three differents softening laws were considered with a variable crack band width, that is a function of the element size and the normal crack direction. Three differents plain concrete beams under bending and shear actions, were simulated. These ones had been tested by others authors previously. The first beam shows a mode I of fracture, while the second and the third shows a combination of modes I and II. The mechanic response and the crack trajectory were calculated with the implemented model. The numerical and experimental results are similar. With the smeared crack rotating model was possible to simulated in a correct way, problems were the principal failure mode is mode I, and also problems where mode I and II are the ones that rules the beam beahviour. The above indicates the potential that the model has, because the original model formulation was made only to consider failure under mode I, however, the assuption about the local axes rotation, allows to simulate models with a combination of modes I and II.spa
dc.description.abstractAbstract: The smeared crack rotating model, allows to simulate the behaviour of quasi–brittle materials like the plain concrete under tension stress. This thesis shows the development, implementation and validation of this model under the scope of the finite element method, for a plain stress condition. The constitutive model proposed by Jir´asek, 2011 was implemented in a non–linear analysis program named HYPLAS. In the modelation, three differents softening laws were considered with a variable crack band width, that is a function of the element size and the normal crack direction. Three differents plain concrete beams under bending and shear actions, were simulated. These ones had been tested by others authors previously. The first beam shows a mode I of fracture, while the second and the third shows a combination of modes I and II. The mechanic response and the crack trajectory were calculated with the implemented model. The numerical and experimental results are similar. With the smeared crack rotating model was possible to simulated in a correct way, problems were the principal failure mode is mode I, and also problems where mode I and II are the ones that rules the beam beahviour. The above indicates the potential that the model has, because the original model formulation was made only to consider failure under mode I, however, the assuption about the local axes rotation, allows to simulate models with a combination of modes I and II.spa
dc.description.degreelevelMaestríaspa
dc.format.mimetypeapplication/pdfspa
dc.identifier.eprintshttp://bdigital.unal.edu.co/72927/spa
dc.identifier.urihttps://repositorio.unal.edu.co/handle/unal/76492
dc.language.isospaspa
dc.relation.haspart62 Ingeniería y operaciones afines / Engineeringspa
dc.relation.haspart69 Construcción / Building and constructionspa
dc.relation.ispartofUniversidad Nacional de Colombia Sede Bogotá Facultad de Ingeniería Departamento de Ingeniería Civil y Agrícola Ingeniería Civilspa
dc.relation.ispartofIngeniería Civilspa
dc.relation.referencesTamasco Sandoval, Juan Carlos (2019) Simulación del proceso de fractura de estructuras de concreto simple, con el modelo de fisura distribuida rotante en el marco del método de los elementos finitos. Maestría thesis, Universidad Nacional de Colombia - Sede Bogotá.spa
dc.rightsDerechos reservados - Universidad Nacional de Colombiaspa
dc.rights.accessrightsinfo:eu-repo/semantics/openAccessspa
dc.rights.licenseAtribución-NoComercial 4.0 Internacionalspa
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/spa
dc.subject.proposalMateriales cuasi-frágilesspa
dc.subject.proposalModelo de fisura distribuida rotantespa
dc.subject.proposalMétodo de los elementos finitosspa
dc.subject.proposalMecánica de la fracturaspa
dc.subject.proposalQuasi–brittle materialsspa
dc.subject.proposalSmeared crack modelspa
dc.subject.proposalFinite element methodspa
dc.subject.proposalFracture mechanicsspa
dc.titleSimulación del proceso de fractura de estructuras de concreto simple, con el modelo de fisura distribuida rotante en el marco del método de los elementos finitos.spa
dc.typeTrabajo de grado - Maestríaspa
dc.type.coarhttp://purl.org/coar/resource_type/c_bdccspa
dc.type.coarversionhttp://purl.org/coar/version/c_ab4af688f83e57aaspa
dc.type.contentTextspa
dc.type.driverinfo:eu-repo/semantics/masterThesisspa
dc.type.redcolhttp://purl.org/redcol/resource_type/TMspa
dc.type.versioninfo:eu-repo/semantics/acceptedVersionspa
oaire.accessrightshttp://purl.org/coar/access_right/c_abf2spa

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