Unidad de Posgrado Civil y Mecánica

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    Análisis comparativo de una estructura habitacional con diagonales excéntricas y una estructura sin diagonales excéntricas, ante una solicitación sísmica
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica. Maestría en Ingeniería Civil con Mención en Estructuras Metálicas, 2022-09) Salazar Gamboa, Alvaro Napoleón; Frías Torres, Alex Xavier
    The main objective of this research work was the comparative analysis of a housing structure under seismic stress, taking as a reference point the urban area of Ambato, capital city of the province of Tungurahua, where the building under study is located. A specialized software was used for the modeling and design of the structure, as well as the guidelines of the Ecuadorian construction standard NEC-SE-DS 2015 and ANSI/AISC 360 and 341, respectively. The results obtained were satisfactory with respect to drifts and deflections, according to the configuration in columns, beams and diagonals it was not necessary to redesign the sections of the structural elements. Regarding the analysis, it should be noted that both the structure without eccentric braced frame and the structure with eccentric braced frame obtained an adequate behavior, with drifts of less than 2 percent that comply with the stipulations of the standard, but a notable difference was evidenced in the sections of both columns and beams, obtaining a 45.88 percent reduction in the weight of the structural elements. In the structure with eccentric braced frame, the drifts were maintained within the established limits for this typology according to the NEC with the inclusion of some diagonals, which helped to improve the behavior, reducing considerably the different sections of the structural elements, thus lightening the structure, achieving a balance and avoiding torsional effects in the floor plan, as well as allowing compliance with the maximum floor drifts that limit seismic damage. It was concluded that the structure with eccentric braced frame presents a better lateral resistance to the action of an earthquake due to the addition of the diagonals, which are responsible for redistributing the lateral forces within the building, lightening the structure and considerably reducing the weight of the elements and the consumption of materials.
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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 del diseño por el método de elementos finitos de una cuchilla de corte, para la obtención de tiras de caña guadua (bambú)
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica. Maestría en Diseño Mecánico, 2016) Vacacela Miranda, Wilmo Marlon; Carrillo Rosero, Carlos Mauricio
    research is based on simulation by the finite element method of a cutting blade for obtain strip of guadua cane (bamboo), through software ANSYS Workbench LS-DYNA, to guarantee if the desing of the cutting blade perform the main features to wich they were made for. When performing dynamic analysis to verify the cutting blade relative to the guadua cane (bamboo), we proceeded to determine the mechanical properties of the guadua cane (bamboo), in order to obtain the main characteristics of such material and to get trustworthy data to be admitted to the software, moreover, data from the cutting blade material were selected from catalog, being a relevant information in the present research. Static simulations were conductec with both materials of the selected cut blade taking into account the angle of the cutting edge, concave and convex geometries in order to get the most feasible model, then a dynamic analysis determined the best desing with this parameters.