Maestría en Ingeniería Civil con Mención en Estructuras Metálicas

Permanent URI for this collectionhttp://repositorio.uta.edu.ec/handle/123456789/34193

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    Análisis del comportamiento de conexiones rígidas para pórticos especiales compuestos mediante modelos de elementos finitos.
    (Magister en Ingeniería Civil con mención en Estructuras Metálicas, 2025) Castillo Altamirano Fausto Israel; Ramírez Cabrera Wladimir José
    The present research focuses on the analysis of the behavior of connections for special composite frames, given the seismic hazard in Ecuador; three types of connections were studied: End Plate, External Diaphragm and Double Split Tee (DST) through finite element analysis, with square columns filled with concrete (Concrete Filled Tube, CFT). In the investigation it was necessary to apply the rotation protocols proposed by AISC (American Institute of Steel Construction) in AISC 341-16. Non-linear contact between parts that make up the connections were used, as well as the definition of the constitutive laws of each material that makes up the connection in order to capture the plastic behavior under the cyclic loads imposed in the analysis. The results were analyzed by means of three criteria: hysteretic curves, plastic deformations and stress concentration. Altogether, the DST, End Plate and external diaphragm connections agree with the experimental tests of previous investigations. The plastic deformation mechanisms were mainly located in the beam resulting in the formation of the plastic hinge. The concrete filled column remained in the linear zone without higher stress concentration while the beam only had deformation at the point of the plastic hinge. The DST connection was the one that showed the highest capacity to the rotation of 0.04 rad, considering that it exceeded with 43% of the 0.8 times the plastic moment of the beam, followed by the End plate connection with 24% and the external diaphragm connection with 8%, which is why they are qualified as rigid connections according to AISC. In this seismic Ecuadorian environment, the present research emphasizes the relevance of using numerical analysis based on standards such as AISC, to evaluate the behavior of structural connections and their capacity to resist the real conditions of the seismic conditions
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    Diseño sismorresistente de un edificio de 4 plantas en estructura metálica con un subsuelo en hormigón armado ubicado en la ciudad de Quito
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica. Maestría en Ingeniería Civil con Mención en Estructuras Metálicas, 2024-09) Quintana Vásconez, Roberto Sebastián; Peña Jordán, Francisco Agustín
    The present thesis shows the structural design of a project located in a high seismic activity zone, with particular focus on seismic safety and compliance with applicable regulations such as AISC 341, AISC 360, AISC 358, NEC 2015, and ASCE 7-16. Based on previous geotechnical studies, a detailed analysis of soil conditions and expected loads was conducted to ensure a solid foundation for the structure. This analysis enabled the identification of the necessary seismic parameters to adapt the structural design to the specific characteristics of the terrain and ensure stability against seismic movements. During the project development, specialized software was used to perform structural modeling. Through these programs, seismic loads were precisely simulated, analyzing both the stresses and deformations that the structure could experience. This approach optimized the structural behavior, ensuring an adequate distribution of stresses and minimizing inter-story drifts and lateral displacements at each level. The results demonstrated robust structural performance under the seismic demands of the site, highlighting the implementation of cruciform steel columns. This structural solution maximized the building's efficiency, leveraging its high moment of inertia, which is essential for resisting lateral loads. Finally, the validation of the design parameters confirmed compliance with seismic design codes, ensuring that the building can withstand the expected seismic demands without compromising its safety or functionality. This comprehensive approach has allowed the development of an optimized structure that meets local requirements, providing a viable and safe solution for high seismic risk conditions.