Análisis de respuesta de sitio unidimensional (1d) de 3 perfiles de suelo ubicados en la cuenca sur de la ciudad de Quito. / Jonathan Alexander Bonilla Bolaños

Abstract

In the present work, a site analysis of 3 soil profiles corresponding to the project of "updating the Seismic Microzoning of Quito Phase 1" was carried out, a process that was carried out with the help of the DEEPSOIL software version 7.0. and MATLAB 2015b. For which the "Geophysical Institute of the National Polytechnic School" provided us with 8 seismic signals that meet the characteristics of being crustal earthquakes that have a magnitude (MLv) greater than 3.7 and a PGA greater than 1 of the QUIB station, located in the south of Quito. For the analysis, it was only carried out with the section corresponding to the S waves and the seismic coda. It works with both horizontal and vertical signals. The soil column was modeled, using the GQ/H model adjusted with the model of (Darendeli, 2001) for fine soils and the MKZ model adjusted with the model of (Menq, 2003) for coarse soils, calculating the curves of damping, degradation modulus and shear stress-strain curve. A linear analysis is performed just like a linear-equivalent analysis. Seismic deconvolution is carried out in well PCQ0013, discovering synthetic signals at the base of the superficial sediments, with which seismic convolution was carried out for wells PCQ0012, PCQ0013 and PCQ0014. Obtaining the spectral density (PSD), then the spectral division between the spectral densities of sites vs. the reference spectral densities thus obtaining the transfer functions.