Dynamic Analysis
The dynamic analysis is performed, after the final step of the construction stage described before, by using Nonlinear Time History analysis, considering the seismic inputs described in previous paragraph. The present analysis is repeated for all the two above described characteristic sections (Figures 17 and 18).
In order to minimize reflection effects on vertical lateral boundaries of the grid, as mentioned before, free field boundary conditions available in MIDAS GTS library have been used.
The soil hysteretic behaviour was modeled using the shear modulus decay curves given by [9] and [11] (Figure 16). In order to evaluate the seismic response of the system (Figure 19), the amplification of the seismic input was evaluated at the remarkable points A, B, C and D represented in Figures 17 and 18.