Geotechnical characterization of sites using environmental seismic noise

Project Details

Description

In the last decade, the emergence of environmental seismic noise as an important source of information to obtain, through its numerical treatment, images of the structure of the earth on many different scales has been spectacular. the studies of surface wave tomography and the obtaining of green functions of different sites from the use of environmental seismic noise are notable. in this project, we seek, through the theory of fuzzy fields, to have a methodology to make the inversion of the geotechnical properties (mechanical and geometric) of sites from measurements of environmental seismic noise. this means that, by means of the use of non-invasive techniques (only of measurements of accelerations in the surface of the terrain) it is possible to obtain, in very good detail, the properties of the site under study. this is possible because, according to the theory of fuzzy fields, the measurement of environmental seismic noise is related to a property of the site (green's function), which can be modeled computationally. with this, the numerical model used to characterize a specific site can be changed until the green function of the model matches or closely approximates the measurement obtained from the environmental seismic noise, and it will be, said numerical model, that represents the site in study. in this project the mathematical formulation and numerical implementation of the calculation of the green function for stratified media will be carried out using the thomson-haskell method (propagation matrices), which corresponds to the direct method within the investment process.this methodology is much faster and computationally efficient than the traditionally used (global matrix), which will significantly reduce the execution time of the investment process characteristic of the characterization.

Objective

Develop an efficient computational tool, which, through an investment process, performs the geotechnical characterization of sites using environmental seismic noise measurements and the theory of fuzzy fields.

Expected results

Research article a1 accepted, development of computer program for the characterization of sites using environmental seismic noise and presentation in national event, there is no knowledge of the existence of a computational tool that performs what is planned in this project.there is a computational tool called geopsy that is used for the analysis of environmental seismic noise but it is not based on the concept of diffuse fields and can not be used for marine environments such as the one that is intended to be developed.the great difference of the investment methodology of the geotechnical properties of sites proposed in this project with the existing ones, lies in their greater computational efficiency, which translates into a shorter calculation time for the characterization of sites.
StatusFinished
Effective start/end date1/08/1730/07/18

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