Soil degradation during seismic events in terms of primary wave velocities

Authors:  
Rubric:     Theoretical and experimental studies   
Annotation:
The author suggests the approach to account for the degradation of the soil properties in terms of primary wave velocities.The proposed approach is based on the separation of shear and volume deformations, each of them with the corresponding elasticity module. For shear deformations the degradation estimates are based on the lab tests results obtained for the soil samples. For volume deformations the absence of degradation in terms of the elasticity module is assumed. Primary waves combine shear and volume deformations. As a result, there is some degradation in the primary wave velocity though different from that for the shear wave velocities. The proposed approach enables estimates of the primary wave velocities (in addition to the shear wave velocities) to be used in the soilstructure systems models.