Material archive

From the material archive command you access the tables shown in the following figures, from which it is possible to assign all the input parameters of the soils and of any structural elements that are part of the model.

Definition of the soil properties

Definition of the structural material properties

For each material the usual geotechnical properties must be assigned (unit weight, K0, deformation modulus, etc.), a decay law of the G/Gmax ratio and of the damping D as a function of the shear strain, and the velocities VS and VP. In the definition of the materials, a layer representing the bedrock must also be included, which will be treated by the software as a material with linear elastic and absorbing behaviour.

Decay law

The initial values of Gmax and G0 are computed automatically by the program, after entering the velocity VS of the shear waves and the unit weight. The damping ratio is required as a fraction of the critical one. For the Rayleigh Mass and Rayleigh Stiffness data, please refer to the Local seismic response analysis section.