Análisis del peligro sísmico utilizando el método determinista en el sector Pishilata barrio Pasochoa del cantón Ambato – provincia de Tungurahua

Abstract

The purpose of this experimental work is to evaluate the period of vibration of three type structures located in the study area and obtain a deterministic spectrum for this sector expressed as the acceleration of gravity Sa (g), and compare it with the spectrum of the NEC 2015. For this, the following steps were carried out: Identify the tectonic regime in the study area, select the geological faults that are longer and closer to the study area and be able to produce a significant movement, such as the Ambato Fault, Huachi, Totoras, Samanga and the Subduction Failure. Using the standard penetration test (SPT) applied at 5 points of the study area, the average shear wave velocity Vs30 approximate for the type of soil profile was calculated, using an empirical correlation between the resistance to standard penetration (N) and the velocity of the shear wave (Vs). The magnitude of momentum for each selected fault was calculated, based on the Wells-Coppersmith methodology, using parameters such as the distance to the epicenter, hypocenter and focal depth. By means of the Prediction Equations of Soil Movement (GMPEs), acceleration spectra are obtained and by means of an envelope of all the maximum acceleration spectra the deterministic spectrum is obtained, which is compared with the response spectrum of the NEC 2015. With these obtained spectra, 3 type structures of the study area were analyzed bymeans of the ETABS program, to observe their behavior before seismic events.