Browsing by Author "Pérez Galarza, Christian Danilo"

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    Análisis de las correlaciones entre propiedades índice y mecánicas con la resistividad eléctrica de suelos granulares en la zona 3 de la ciudad de Ambato
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica, Carrera de Ingeniería Civil, 2020) Pérez Galarza, Christian Danilo; Portilla Yandún, Favio Paúl
    The experimental work developed an electrical resistivity study to later analyze it with the index and mechanical properties of granular soils in the city of Ambato, all the procedures that were performed during the project are indicated below. A macro project was formed indicating four areas of Ambato in order to reach a larger sample size of the research. A visit was made to the sectors where 10 points were selected for each zone, the same ones that were previously identified in previous titling works. At the identified points, field tests were carried out and samples were subsequently collected to perform the respective laboratory tests. With the results obtained through the tests, correlation regressions were established using the method of least squares used data processing software. Correlation values that had a sensible relationship and those that had a correlation value greater than 50 percent were chosen. Finally, 30 correlations were found with R2 correlation coefficients that comprised between 61 to 96 percent, which indicated that the electrical resistivity method is reliable and in a certain economic way to find certain index and mechanical properties of granular soils.
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    Desempeño de estructura metálica mediante análisis dinámico con acelerogramas ajustados con espectro medio condicional (CMS)
    (Universidad Técnica de Ambato. Facultad de Ingeniería Civil y Mecánica. Maestría en Ingeniería Civil con Mención en Estructuras Metálicas, 2022-09) Pérez Galarza, Christian Danilo; Chérrez Gavilanes, Diego Sebastián
    The present investigation is carried out in Huachi Loreto in Ambato city, starting as a first point, to identify the geological faults near this study site that can contribute to generate a seismic event that affects the structures in the area. Using empirical formulas, the value of the shear wave velocity was obtained based on calculated values, specific to the site, such as the length of the fault, source - study distance, focal depth, expected moment magnitude, and values of the number of blows of the SPT test performed in situ. This shear wave velocity allows determining the type of soil existing in the area according to the ranges established by the Ecuadorian Construction Standard (NEC 2015). Subsequently, an attenuation model was chosen (Montalva) that allows to determine, by applying certain equations called GMPEs (ground motion prediction equations), a possible behavior of the soil based on complementary data to those already mentioned specific to the site such as distance and hypocentral depth. From the GMPE graph and the uniform hazard spectrum (UHS) and applying certain equations determined in the Bakker model, the conditional mean spectrum (CMS) was obtained. The use of this spectrum allowed a comparison of the behavior of a metallic structure proposed in this study, with respect to the elastic spectrum imposed by the NEC. This comparison was made on the basis of the results provided by the nonlinear dynamic analysis (time-history), through which the performance of the same structure subjected to scaled seismic events was determined with respect to the CMS and the NEC spectrum. It was obtained as a result that the seismic demand produced by the NEC spectrum is greater than that produced by the CMS, since the pseudospectral accelerations have a great difference between these spectra, which is why the maximum displacements and drifts are reduced by approximately 65 percent by applying the CMS in the present investigation.