Propuesta de procedimiento estandarizado para la obtención de los parámetros de entrada del análisis de respuesta de sitio 1D. Caso de estudio: Provincia constitucional del Callao

Abstract

La presente tesis desarrolla de manera detallada el análisis de respuesta de sitio unidimensional empleando la metodología lineal equivalente en 2 depósitos de suelo ubicados en la provincia constitucional del Callao con el objetivo de establecer un procedimiento estandarizado de la secuencia completa de análisis que engloba la información de entrada requerida, la compatibilización de la información de perfiles estratigráficos, la información obtenida a partir de ensayos geofísicos y las muestras de suelo extraídas a diferentes niveles de profundidad, la selección de los registros sísmicos aptos para el análisis, el ingreso de la información en la herramienta computacional Deepsoil, la interpretación de los resultados obtenidos y la comparación de los espectros de aceleración obtenidos con investigaciones previas y con el espectro construido a partir de la actual norma de diseño sismorresistente E0.30.

This thesis develops in detail the analysis of one-dimensional site response using the equivalent linear methodology in 2 soil deposits located in the constitutional province of Callao with the aim of establishing a standardized procedure of the complete sequence of analysis that includes the necessary input data, the harmonization of stratigraphic profile information, the information obtained from geophysical tests and soil samples extracted at different depth levels, the selection of seismic records suitable for the analysis, the input of the information in the computational tool Deepsoil, the interpretation of the results obtained and the comparison of the acceleration spectra obtained with previous research and with the spectrum constructed from the current seismic-resistant design standard E0.30 In the context of this research, information has been collected from a project executed in the study area. This project includes the realization of six drillings, each with an average maximum depth of 39 meters, aimed at the study of two specific deposits. Additionally, information from two types of geophysical prospecting (MASW and MAM) has been incorporated, carried out in the areas adjacent to each drilling point. Finally, information corresponding to 48 undisturbed samples for analysis has been collected, of which 28 belong to soil deposit 1 and 20 to soil deposit 2. Regarding the characterization of the dynamic behavior of different soil layers, four empirical models proposed for sands, silts, and clays have been used, specifically: Darendeli (2001), Zhang et al. (2005), Roblee and Chiou (2006), and Wang (2018). In addition, four empirical models proposed for gravels are explored, which are: Rollins et al. (1998), Menq (2003), Umberg (2012), and Rollins et al. (2020). For the present study, it was identified that the representative models for the soils of the study area correspond to the proposal of Wang (2018) and Rollins et al, (2020). Furthermore, the process to obtain the necessary seismic records for the one-dimensional site response analysis is explained in detail. This process includes the characterization of seismicity, the selection and processing of seismic records, and their adjustment to the seismic demand of the site. Free access Python routines are also provided to carry out these procedures. The result obtained from the characterization of the study area and the application of the standardized procedure allowed the obtaining of specific acceleration spectra for the site. It is important to mention that the spectra obtained from the application of this procedure that develops and applies the equivalent linear methodology show that greater accelerations are presented than those of the spectrum constructed from the current standard E0.30.