Ingeniería Civil y Mecánica

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    Análisis de desempeño sísmico del edificio COAC San Martín ubicado en el cantón Tisaleo
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Civil., 2025-02) Yugcha Rumiguano, Christian Sebastián; Peñafiel Valla, Lourdes Gabriela
    Ecuador is located in the Ring of Fire, so it is subject to stochastic phenomena such as earthquakes, since buildings must be governed according to the current NEC 15 standard to ensure that the design meets earthquake resistance criteria. The purpose of this research work is to determine the seismic performance of the building under study. A qualitative analysis was carried out using the NEC 15 standard, in which the parameters were evaluated according to the characteristics of the structure, obtaining a score of 2.0, demonstrating that it has a medium degree of vulnerability. In the quantitative section, the linear and nonlinear static Pushover analysis of the structure was carried out using engineering software. In the linear analysis, it was determined that the structure in current conditions presents torsion, and that elements such as beams and columns are not designed to withstand the demands. In addition, through non-linear analysis, the capacity curve of the structure was calculated together with the performance levels and it was determined that the construction does not meet the seismic performance objectives according to VISION 2000. Once the evaluation of the structure was completed, three more floors were designed, according to the specifications of the calculation report, and with the requests of these, the structure was reinforced, both locally in the elements such as columns and beams using criteria from the ASCE 41-13 standard, in which the concrete screed method was used for the columns and the steel casing method for the beams, and globally with the implementation of shear walls to control torsion and comply with the vibration period of the structure. Finally, with the implementation of the reinforcement and the addition of 3 more floors to the building, the linear analysis was carried out again, to verify that the calculations and design were in accordance with the NEC 15 standard, checking that the elements had the necessary amounts of steel to generate ductility. After that, the non-linear analysis of the structure was carried out, in which the performance objective was determined, complying with what was established in VISION 2000.
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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.
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    Análisis del desempeño sísmico del edificio cooperativa de ahorro y crédito Chibuleo ubicado en el cantón Machala
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Civil, 2024-02) Pintag Quitio, Esau Ernesto; Ramírez Cabrera, Wladimir José
    Through scientific research, it is understood that a linear static analysis was not enough to understand the behavior of a structure, hence the need to analyze it under a non-linear regime. The present experimental work for its development was carried out in 4 phases: Initial phase, consisted of collecting all the necessary data of the building, structural and architectural plans, destructive tests of concrete and steel, determining the mechanical properties of the material with their respective control reports. quality, for verification, with the purpose of implementing a three-dimensional mathematical model in engineering software. For the first, the structural response was analyzed through linear seismic analysis, verifying: vibration period, participatory mass, plan torsion, static basal shear, dynamic basal shear, floor derivatives, structural elements (beams, columns) and seismic resistance criteria according to per NEC-SE-DS-15. For the second, the capacity curve was calculated using Pushover analysis and the behavioral objectives proposed by the VISION 2000 committee for a frequent, occasional, rare and very rare earthquake were evaluated using the ASCE 41 coefficient method. 13. As a result, in phase 3, an optimal strengthening method at the structural element level was proposed, according to the data of linear seismic analysis and nonlinear static seismic analysis, and the analyzes of phases 1 and phase 2 were carried out again. .in order to check if the reinforcement was optimal for the building.
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    Evaluación de la vulnerabilidad sísmica de edificaciones de estructuras metálicas en la parroquia Izamba (Zona 3), Ambato, Ecuador. Propuesta de reforzamiento estructural de una edificación representativa
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica. Maestría en Ingeniería Civil con Mención en Estructuras Metálicas, 2023-03) Vargas Aráuz, Ángela Verónica; López Velástegui, Jorge Enrique
    This research work shows the application of the rapid visual inspection methodology according to FEMA P-154, with which it is possible to identify, inventory and examine the possible seismic risks of the buildings evaluated and with this information decide if a detailed structural evaluation is necessary. The seismic vulnerability according to FEMA P-154 is expressed in terms of the probability of collapse of the structure, with this information you can manage contingency plans before and after earthquakes and inform the owner of the building the status and possibility of structural reinforcement. After carrying out the evaluation of the selected buildings, a representative structure was determined located in the Izamba parish of the city of Ambato, which was chosen for its level of importance and based on the results of the previous evaluation. With the data obtained from the rapid visual inspection and the documentation obtained from the representative building, a linear static analysis was carried out, with the application of the Ecuadorian construction standard, to determine the current behavior of the structure according to its efforts, displacements, and maximum permitted drifts. The structural analysis determined that the building presents great flexibility and fails in some members such as beams and columns. As a solution to the problem detected, structural reinforcement was chosen with steel diagonals to increase the rigidity of the structure and incorporate additional structural members that support seismic actions. The research was completed by performing the nonlinear static analysis known as Pushover of the reinforced building, from this analysis the capacity curve is obtained and the probable performance of the structure before the design earthquake can be verified.
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    Capacidad sísmica residual de un edificio reforzado con perfilería metálica usando análisis no lineal en la ciudad de Ambato
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica. Maestría en Ingeniería Civil con Mención en Estructuras Metálicas, 2022) Cisneros Sánchez, Francisco Vinicio; Peñafiel Valla, Lourdes Gabriela
    To start with the execution of this project we took into account a building located in the city of Ambato, province of Tungurahua, this was born due to the informal construction and non-compliance of structural plans and poor quality of materials. The structure was built of reinforced concrete, reinforced with the method of jacketed columns and beams on metal structure, it has 5 floors and its use is residential. The building was studied the different behaviors that it could have with an Occasional, Frequent, Rare and Very Rare earthquake, as recommended by the NEC-2015 through static and dynamic analysis, verifying its current design conditions and concluding that the building complies with current structural design regulations. The seismic capacity of a structure refers to the total energy that it is capable of dissipating during a seismic event and the residual seismic capacity corresponds to the energy that the structure can still dissipate after a seismic event, under which it has not exhausted all its capacity. In the present investigation, the capacity indexes of the building were determined without reinforcing its mezzanine floors, in this behavior there would have been severe damages in a design seismic event and with reinforcement it could have light damages. The seismic capacity reduction factor calculated with the dissipated energy method by the Japanese Damagexviii Assessment Guide (JBDPA 2015) was determined that for an earthquake Frequent Tr=72 years, Occasional Tr=225 years the damage class would be of a level I that could appear fine cracks smaller than 0, 2 mm and in a Rare Tr=475 years and Very Rare Tr=2500 years earthquake, the damage class would be of a level II where the members of the structure could yield and there could be visible cracks at their ends between 0.2 mm to 1.0 mm wide. In order to complete the study, the costs of rehabilitation and maintenance were determined by means of FEMA P-58 in each seismic event, concluding that currently in a frequent, occasional and rare earthquake it is recommended to repair it, but in a very rare seismic event the cost is similar to the current value of the structure and it is recommended to demolish it.
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    Análisis cuantitativo y cualitativo del grado de vulnerabilidad sísmica de la Facultad de Ciencias Administrativas de la Universidad Técnica de Ambato, Campus Huachi.
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica. Carrera de Ingeniería Civil, 2019) Montalvo Quinteros, Gabriel Alejandro; Cevallos Cabrera, Jorge Washington
    In the present research work, the degree of seismic vulnerability of the administrative building of the faculty of Administrative Sciences of the Technical University of Ambato, Campus Huachi, was determined by means of two methodologies such as Qualitative and Quantitative. For the first methodology formats raised were used by both local and international standards, the results of which were opposed because by FEMA 154 format is described the structure as highly vulnerable, and using the formats set by the NEC 2015 and the National Secretary Risk Management structure did not present any seismic vulnerability, for this analysis took into account primarily irregularities in plan and elevation, soil type, the year it was built and materials. For the second approach the point of performance of the structure was determined by a nonlinear analysis, in the same way, the four damage thresholds (MILD, MODERATE, EXTENSIVE, COMPLETE) suggested by RISK EU and HAZUS was calculated, which they served of base to carry out an analysis of fragility to the structure thus presenting a high degree of probability that the structure will enter into extensive and complete damage, which means that it presents a high seismic vulnerability.