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.ANÁLISIS SÍSMICO

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    Análisis de vulnerabilidad sísmica y reforzamiento estructural del edificio Colineal, ubicado en la parroquia Atocha-Ficoa, cantón Ambato
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica. Maestría en Ingeniería Civil con Mención en Estructuras Metálicas, 2023-03) Romero Guamanquispe, Jorge Roberto; Núñez Aldas, Galo Wilfrido
    In this degree work, as an initial part, a seismic vulnerability analysis of the metal structure buildings in the Atocha-Ficoa parish is carried out through quick visual inspections using the forms established by the Ecuadorian Construction Standard NEC-2015, FUNVISIS as well as by the Federal Emergency Management Agency of the United States FEMA P-154, since through this study it was determined that the houses in this parish present a medium-high vulnerability, Thus, the most representative building was selected, the Colineal company building, which presents technical-constructive observations of structural order such as fissures, cracks, detachment of plaster on walls and floors, which has caused a premature deterioration of the infrastructure. For this reason, an analysis was carried out by means of mathematical models through the ETABS computer program, where a linear analysis was performed to verify structural parameters such as drifts, displacements, and vibration periods. Subsequently, a non-linear static analysis (Pushover) was performed to determine the capacity of the structure and its performance level in the presence of a seismic event, to finally determine, based on the performance obtained, a structural reinforcement system by means of concentric diagonals, which will provide greater stability, ductility and resistance to the building and through this constructive alternative improve its seismic performance level and adequately meet the technical criteria for life safety.
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    Vulnerabilidad sísmica del parqueadero municipal del Gobierno Autónomo Descentralizado de Ambato, ubicado en la calle Cuenca y Montalvo
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica. Maestría en Ingeniería Civil con Mención en Estructuras Metálicas, 2022-09) Lucio Álvarez, Diego Ricardo; Peñafiel Valla, Lourdes Gabriela
    Ecuador is located in the ring of fire, so different earthquakes at various levels are very common, the structures must be designed to withstand an earthquake of a rare level, the constructions must be ductile; the ductility is the time that the occupants of the structures have to be able to go out to a safe place, the secondary waves of the earthquakes are the ones that knock down the buildings, through the present study a building located in the central area of Ambato was taken as a sample , this structure should be in a life safety acceptance criteria, to start the present study the forms established by FEMA 154 and NEC 2015 were used and a visual inspection of the structure was carried out to know the irregularities in plan and elevation, In addition to knowing pathologies that the structure has, the main pathology is the short column, the parameters of the forms were established and it was concluded that it has a medium seismic vulnerability, with this information a nonlinear static analysis was carried out, it was necessary to use a computer program such as Etabs19, where the steel area was placed in each of the beams and columns, with this information formation we obtainedxxiv the plastic hinges, as well as the performance point and the capacity of the building under study, in which it was observed that the structure does not meet this acceptance criterion for the design earthquake, which is why it is necessary to carry out a reinforcement in beams, but above all in C2 columns, which are the columns that act the most in these two buildings. There are several methodologies for reinforcing structures among the most common (reinforcement with carbon fiber, reinforcement with screeding of structural elements and reinforcement with steel), reinforcement with angles and plates of A36 steel was chosen, these angles fastened with plates and bolts they help to gain ductility and more shear strength of the structure in order to meet the acceptance criteria for this type of building, which is life safety.
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    Comparación de la respuesta sísmica entre pórticos especiales a momento y pórticos arriostrados excéntricamente, en un edificio de acero de 10 pisos, en el cantón Ambato, provincia de Tungurahua
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica. Maestría en Ingeniería Civil con Mención en Estructuras Metálicas, 2022-09) Aleaga Del Salto, Luis Alfonso; Guevara Robalino, Jorge Javier
    Ecuador is a country of high seismic danger; therefore, the calculation of structures will always be a challenge for engineers since every day new advances in science and technology emerge, making it possible to predict the behavior of a building in extreme events such as earthquakes; in this work the Ceinci-Lab Computer System has been used, which allowed to perform analysis and design of structures step by step obtaining clear and accurate results. The objective of this research is to compare the seismic response between special moment frames and eccentrically braced frames in a 10-story steel building. A simple and regular structural configuration was used to obtain a better seismic performance of all the components of the system. Subsequently, the seismicresistant analysis of the frames was carried out with the different structural configurations proposed in the Ceinci-Lab computer program, using the linear modal spectral and static equivalent analysis for its resolution and complying with the guidelines established in the Ecuadorian construction standard and international codes; finally, it was determined that the building composed of eccentric diagonals had a better seismic response than the one composed of moment resisting frames, obtaining lower displacements and floor drifts; It was also verified that the demand versus capacity of each system is optimal, thus ensuring a strong column - weak beamxvii behavior; additionally, a nonlinear pushover analysis was performed to determine the real maximum resistance of the structure and the performance of all its components; therefore, it is essential to consider the use of bracing in the structural configuration of medium-rise buildings, especially with short link elements, since they act as energy dissipaters, improving the stiffness and global response of the system in severe earthquakes.
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    Análisis estático no lineal (Push Over) de los talleres de la Facultad de Ingeniería Civil y Mecánica y de la Facultad de Ingeniería en Sistemas Electrónica e Industrial, con aisladores sísmicos, ubicadas en el campus Huachi 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, 2022) López Sánchez, Byron Leonardo; Ureña Aguirre, Maritza Elizabeth
    This research work presents a comparative analysis of the structural behavior of a conventional structure and another with the implementation of seismic isolators, which are devices that allow the building to deform elastically and dissipate energy during the occurrence of earthquakes of considerable magnitude. The structures analyzed were the workshops of the faculties of: Civil and Mechanical Engineering and Systems, Electronics and Industrial Engineering and they are classified as special according to the Ecuadorian Construction Standard (NEC 2015), and present a structural system of special earthquake resistant gantries made of hot rolled steel with stiffening diagonals, they are also used as laboratories for the production area and as a higher education center.xxiii As a first study, a linear analysis of the structures was performed to verify their current state by analyzing their vibration period, displacements and permissible drifts, then a non-linear static analysis was performed to determine their seismic performance, and then the isolation system was pre-dimensioned. It was designed taking as a priority the ASCE/SEI 7-10 standard, the dead loads of the building plus 30 percent of the live load above the isolation system and based on the information provided by the manufacturer. It should be taken into account that there are a large number of options of anti-seismic devices to improve the performance and behavior of a structure; in this case study, the lead core elastomeric isolator (LRB) was chosen. Subsequently, all the established limits such as drifts, shear and displacements were verified, taking into account the provisions of the Ecuadorian Construction Standard. For the workshop of the Faculty of Civil and Mechanical Engineering with isolated base, the floor drifts were reduced by 64 percent compared to the structure without isolation, for the basal shear and horizontal displacements a reduction of 73 and 51 percent respectively, likewise for the workshop of the Faculty of Systems, Electronics and Industrial Engineering the floor drifts, shear and displacement were reduced by 69, 74 and 63 percent respectively.