Page 264 - Numerical Analysis and Modelling in Geomechanics

F.PERGALANI, V.PETRINI, A.PUGLIESE AND T.SANÒ 245

Table 8.2 Geotechnic parameters for the lithotechnic units (V s shear wave velocity; v
Poisson coefficient; γ soil unit weight; G o shear modulus at low strain; ξ initial damping
coefficient) (Pergalani et al., 1999)

Figure 8.13 Damping coefficient variation with shear strain (Pergalani et al., 1999).

Table 8.3. As a second step, a numerical analysis was performed on point sites or
two-dimensional sections, crossing the inhabited areas.
The programs available for the analysis evaluate the entity of local site
amplifications with different methods; the most suitable program was selected
for every site condition.