Análisis del desprendimiento del concreto en conectores de cortante tipo tornillo sometidos a tracción
The steel concrete composite beams is a system that a steel wide-flange shape (I or W shape) is attached to a concrete floor slab by shear connectors. The use of steel-concrete composite beams has been increased by the advantages it presents over other systems. In Colombia, the screws connectors gra...
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| Tipo de recurso: | tesis de maestría |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2020 |
| País: | Colombia |
| Institución: | Universidad Nacional de Colombia |
| Repositorio: | Repositorio UN |
| Idioma: | español |
| OAI Identifier: | oai:repositorio.unal.edu.co:unal/75557 |
| Acceso en línea: | https://repositorio.unal.edu.co/handle/unal/75557 |
| Access Level: | acceso abierto |
| Palabra clave: | Ingeniería y operaciones afines Pull-out test; Numerical modeling; Composite section; Screw Ensayo pull-out; Modelación numérica; Sección compuesta; Tornillo |
| Sumario: | The steel concrete composite beams is a system that a steel wide-flange shape (I or W shape) is attached to a concrete floor slab by shear connectors. The use of steel-concrete composite beams has been increased by the advantages it presents over other systems. In Colombia, the screws connectors grade two is frequently used in composite sections due to simple installation on site and easy acquirement. The experimental works about the behavior of composite sections with screw connectors have been shown that the connectors are subjected to combined effects of tension and shear in the inelastic range. Taking into account these, is necessary to analyze the behavior of the composite sections with screws connectors under tensile actions. In the present research, the behavior of composite sections had been analyzed when the screw connectors are subjected to tension actions. Pull-Out tests were performed on specimens composed of one screw embedded in concrete block. As variables were considered: the depth 2, 3 and 4 inches, and the diameter of the connector: 1/2", 5/8” and 3/4”, it defined 9 configurations to analyze and 3 specimens per configuration for a total of 27 tests. The 9 configurations of the exp erimental phase were simulated numerically in the ANSYS, finite element analysis program, in order to validate the numerical models with the behavior observed in the experimentation and analyze the failure mechanisms in concrete and the screw. Finally, comparisons were made between the behaviors obtained by experimentation and numerical simulation with the guidelines specified in the current regulations (NSR-10). |
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