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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Subject: search.filters.subject.DESPLAZAMIENTO DE ESTRUCTURAS

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    Evaluación de vulnerabilidad sísmica de edificaciones metálicas, hormigón y/o mixtas en la parroquia San Bartolomé de Pinllo, Ambato, Ecuador: propuesta de reforzamiento estructural del edificio de San Bartolomé
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica. Maestría en Ingeniería Civil con Mención en Estructuras Metálicas, 2023-03) Zúñiga Zamora, Libio Vladimir; Núñez Aldas, Galo Wilfrido
    The current degree project includes two parts, the first one deals with the study of the seismic vulnerability of existing buildings by using three methodologies, two international and one national, which will be carried out using the qualitative method of rapid visual inspection of houses, using the forms by the Federal Emergency Management Agency (FEMA P - 154) standard, the Building Indexes for Seismic Risk Management of the Venezuelan Foundation for Seismological Research (FUNVISIS) and the Practical Guide for Seismic Evaluation and Rehabilitation of Structures, of the Ecuadorian Construction Standard (NEC 2015), each methodology will assign values and vulnerability indexes, and seismic prioritization to all buildings evaluated. The project will be carried out in a sample of buildings in the parish of San Bartolomé de Pinllo in the canton of Ambato, province of Tungurahua, to obtain vulnerability levels of the sector and assess the damage that may occur in buildings in an earthquake, hence the importance of proposing the research of modern systems of structural reinforcement. The buildings of the parish have vulnerabilities that are between medium-low and medium-high, which demonstrates the importance of applying these methods of rapid evaluation so that local governments can propose mitigation plans for seismic disasters. The second part of the research proposes the study of the steel building of the Decentralized Autonomous Government of San Bartolomé de Pinllo, with a special occupancy category, which is required to determine its structural behavior with the increase of two additional floors to the building, through static, linear dynamic and nonlinear analysis, respectively. To do so, three structural models of the 6-story building were applied. In the first one, linear static and dynamic analysis was developed, in which the effects of the loads and the equilibrium of the internal forces of the structure were determined, to obtain displacements and floor drifts according to the Ecuadorian Construction Standard (NEC 15); In the second model, it was possible to determine the behavior of the structural elements with the sections considered, which make up the building, through plastic ball joints, using a non-linear static analysis (PUSHOVER), to obtain an indicator of the performance of the existing structure. In the third structural model, viscous fluid-type energy dissipators with single diagonal-type configurations were implemented. In addition, three pairs of synthetic accelerogram records were considered, each with its two horizontal components N-S and E-W, parameters necessary to analyze the structure through a nonlinear dynamic analysis (Time-History), to obtain the behavior of the structure with more real data and control its effects resulting from the increase of the two required floors, with which results of the influence of the dissipators on the structure, floor drifts, displacements and performance levels were obtained. The structural elements and the proposed reinforcement system were designed based on the American Institute of Steel Structures Code (AISC 360-10), the American Society of Civil Engineers (ASCE/SEI 41-17), and the Ecuadorian Construction Standard (NEC-15). Finally, the referential cost of the proposed reinforcement system was determined.
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    Análisis del comportamiento estructural mediante el uso de aisladores sísmicos y disipadores de energía en un edificio de estructura metálica, aplicando la norma NEC-15
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica. Maestría en Ingeniería Civil con Mención en Estructuras Metálicas, 2022-08) Beltrán Vargas, Luis Miguel; López Arboleda, Gissela Vanessa; López Velástegui, Jorge Enrique
    In this project there is the need of understanding the dynamical behavior of the building, so there are three structural models that are presented, the first model consisted in an analysis of a conventional building. In the second and third models, seismic isolators and energy dissipators were incorporated, respectively, taking into consideration the criteria of the Ecuadorian Construction Standard (NEC 15), American Society of Civil Engineers (ASCE 7-16, ASCE 41-13), American Institute of Steel Constructions (AISC 341-16). In the first stage of the analysis, the structure was analyzed and balanced, applying the recommendations of the NEC-15. Once the building was stabilized, the analysis of the conventional structure was carried out in order to determine floor drifts and displacements. Subsequently, the pre-dimensioning and corresponding design of the base seismic isolators was carried out, which were considered as elastomeric type devices with a lead core. In the third model, the design of the energy dissipators was carried out. With the necessary information, the values were entered into the calculation program to carry out the study of the structuralxv models. Once the structural model was generated in the software, data from the accelerograms were entered in order to perform a nonlinear dynamic time-history analysis, and a complementary nonlinear static analysis was performed. With the information entered in the software, the results for the first structural model were obtained, among the main results obtained from the structural package are: the floor drifts, displacements, displacement diagrams, energy balance diagrams, results of lateral loads, among others. In the same way, those analyses were developed in the structural models with the base isolation and energy dissipation devices, which, once the required results were obtained, a comparative analysis of the structural behavior was carried out, taking as main parameters of consideration the floor drifts, displacements obtained and energy balances.