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dc.contributor.advisorGodoy, Luis A.
dc.contributor.authorRosario-Galanes, Osvaldo
dc.date.accessioned2018-11-21T10:37:33Z
dc.date.available2018-11-21T10:37:33Z
dc.date.issued2011
dc.identifier.urihttps://hdl.handle.net/20.500.11801/1480
dc.description.abstractDuring high wind events thin-walled folded plates such as roof claddings suffer extensive damage due to fatigue failure at their screwed connections. Currently, damage prediction is based on fragility curves and semi-empirical models where there is no direct relation between loads and failure parameters. In this research a finite element model and fatigue criteria were validated in correlating a wind loading protocol to a specific fatigue failure mechanism. The 3D fatigue process was reduced to a one-dimensional problem by using one or two strain and stress parameters from the finite element model. These parameters were used on a fatigue stress-based and strain-based criteria to establish a fatigue failure mechanism. The fatigue life, and crack directions were predicted as a function of loading parameters and specific cladding configuration. As a result a roofing assembly can be evaluated and rated to withstand a specific wind resistance according to a specific loading protocol.en_US
dc.description.abstractLos techos y cubiertas de placas de pared delgada de lámina metálica sufren daños considerables debido a fallas por fatiga en las conexiones atornilladas durante eventos de viento. Actualmente la predicción de daño está basada en curvas de fragilidad y modelos semi empíricos en donde no existe una relación directa entre carga y parámetros de falla. En esta investigación se validó un modelo de elementos finitos y un criterio de fatiga que correlacionan un protocolo de cargas de viento a un mecanismo de falla por fatiga. El proceso tridimensional se redujo a un problema unidimensional utilizando uno o dos parámetros de esfuerzo y deformación del modelo de elementos finitos. Estos parámetros se usaron en un criterio de fatiga basado en esfuerzos y deformaciones para establecer un mecanismo de daño por fatiga. La vida de fatiga y las direcciones de propagación de las grietas se predijeron en función de los parámetros de carga y la configuración especifica estudiada. Como resultado una cubierta de techo puede ser evaluada y calificada para resistir una carga de viento en específico de acuerdo a un protocolo de carga.en_US
dc.language.isoenen_US
dc.subjectWind induced fatigueen_US
dc.subject.lcshFolded plate structures--Fatigueen_US
dc.subject.lcshThin-walled structures--Fatigueen_US
dc.subject.lcshWind damageen_US
dc.titleModeling of wind induced fatigue of thinwalled folded platesen_US
dc.typeThesisen_US
dc.rights.licenseAll rights reserveden_US
dc.rights.holder(c) 2011 Osvaldo Rosario Galanesen_US
dc.contributor.committeeLópez, Ricardo R.
dc.contributor.committeeSaffar, Ali
dc.contributor.representativePérez, Néstor
thesis.degree.levelM.S.en_US
thesis.degree.disciplineCivil Engineeringen_US
dc.contributor.collegeCollege of Engineeringen_US
dc.contributor.departmentDepartment of Civil Engineeringen_US
dc.description.graduationSemesterSpringen_US
dc.description.graduationYear2011en_US


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    Items included under this collection are theses, dissertations, and project reports submitted as a requirement for completing a degree at UPR-Mayagüez.

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