Προσδιορισμός της εδαφικής δομής με τη χρήση μικροθορύβου. Εφαρμογή στην εκτίμηση των δυναμικών ιδιοτήτων και της γεωμετρίας των εδαφικών σχηματισμών στη Θεσσαλονίκη

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It is widely recognized that local geological conditions have a large impact on ground motion at a given site. The geometry of the subsoil structure, the variation of soil types and its properties with depth, the lateral discontinuities and the surface topography are at the origin of large amplification of ground motion and have been correlated to damage distribution during destructive earthquakes (Aki, 1993; Bard, 1994; Faccioli, 1991; 1996; Chavez-Garcia et al., 1996; Pitilakis et al., 1999, 2001a, 2001b). Site effects estimation requires an adequate knowledge of the geometry and the dynamic properties of soil formations. Among the dynamic properties of soil deposits, the shear waves velocity (Vs) that defines the shear modulus (Go), is one of the most important parameter that controls the amplification of s Επιστημονικό πεδίο