Maestría en Ingeniería Civil con Mención en Estructuras Metálicas

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Start date: 2024Subject: search.filters.subject.ANÁLISIS NO LINEAL

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    Diseño y análisis del comportamiento estructural de un edificio en la ciudad de Ambato mediante el uso de disipadores sísmicos.
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica. Maestría en Ingeniería Civil con Mención en Estructuras Metálicas., 2025) López Sánchez José Luis; Cañizares Ortega Freddy Fernando
    This research project presents a comparative analysis of the seismic performance of a special building located in Ambato, utilizing Special Moment Frames (SMF) and Buckling-Restrained Braces (BRB). The main objective of the study is to evaluate the structural performance in terms of strength, capacity, stiffness, and nonlinear behavior under seismic loading. The proposed design for the steel structure incorporates BRB frames, aimed at minimizing deformations induced by seismic events. These systems utilize braces with ductile cores and replaceable assemblies, which enable efficient energy dissipation. The applied methodology is based on international standards such as AISC 360, AISC 341, NEC 15, and ASCE 41-17, covering literature review, soil analysis, load estimation, nonlinear time history analysis, and unit cost comparison. The results show that BRB systems offer superior seismic performance compared to moment-resisting frames, without involving a significant increase in implementation costs. However, it is important to note that the findings of this research are specific to the soil and loading conditions of the analyzed structure; therefore, further studies are recommended for other types of buildings and geotechnical contexts.
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    Elaboración de curvas de fragilidad al colapso del bloque 1 del edificio del parqueadero de la Universidad Técnica de Ambato.
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica. Maestría en Ingeniería Civil con Mención en Estructuras Metálicas., 2025) Mopocita Cunalata Luis Ricardo; Ramírez Cabrera Wladimir José
    Ecuador is located in areas of high seismic hazard due to its location on the Pacific Ring of Fire. For this investigation, an estimate of the probability of exceeding a certain damage level of the Block 1 parking lot was made by developing fragility curves upon collapse using a nonlinear dynamic time history (ADNL TH) analysis and considering incremental dynamic analysis curves. This investigation followed ASCE 41-17, FEMA P 58, and NEC 2015 guidelines. Through a spectral modal analysis, noncompliance with the strong column-weak beam criterion and torsion of the building in the second vibration mode was observed. The results witnessed a high probability of structural damage to the parking lot or collapse in component 2 (NS), with maximum nonlinear drift responses that do not reach the performance level for immediate occupancy (IO) and life safety (LS) for a return period of 72 years and 475 years. In addition, a total of 218 nonlinear dynamic timehistory simulations were performed at different seismic intensity increments. This research aims to promote the use and development of fragility curves as an alternative to ensuring the safety of those who use buildings or similar structures.
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    Análisis y diseño del comportamiento estructural de pórticos arriostrados excéntricos con vigas de enlace aplicado en un edificio de 7 pisos
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica. Maestría en Ingeniería Civil con Mención en Estructuras Metálicas, 2024-10-01) Bayas Freire, Jorge Esteban; Ramírez Cabrera, Wladimir José
    The purpose of this research project is the analysis and structural seismic design of a seven-story building with steel structure and composite columns filled with concrete, located in the city of Ambato with a irregular floor geometry through the implementation of eccentric braced frames (EBF) with link beams in both directions of the structure with a clear length of 60 centimeters. In this research a dynamic analysis of the structure was carried out in the Etabs software verifying parameters within the Ecuadorian construction standard NEC 15 such as floor drifts, strong column - weak beam criteria, then the design of the structural elements with spreadsheets was carried out complying with the ASIC 360-16, AISC 341-16 and ASCE 7-16 regulations, also the connections of both the link and beam-column of the structure were design through finite element analysis of the welding and the connection plates in the IdeaStatica software complying with the AWS D1.1 design regulations. Additionally, a non-linear static analysis (pushover) was performed in both directions of the structure applying incremental load patterns, the capacity curves and performance points for a rare earthquake and a very rare earthquake were determined, an evaluation of these points was carried out within the matrix established in the Vision 200 standard. Finally, it was possible to observe the real overall performance that the structure will have under seismic loads, thus verifying the behavior of the link as an energy dissipator through the formation of plastic hinges. The results obtained in this research project have demonstrated the correct earthquake-resistant design of the eccentric braced frames, obtaining a safe and efficient structural system.