TY  - UNPB
T2  - COMGEO III, 3rd International Symposium on Computational Geomechanics
A1  - Bacigalupo, Andrea
A1  - Gambarotta, Luigi
Y1  - 2013/08//
TI  - Acoustic velocity in layered rock masses with periodic fractures
ID  - eprints2529
M2  - Krakow (Poland)
AV  - none
N2  - Fractures and layering in rock masses have a large impact on both the
mechanical and hydraulic properties of the rock mass. When considering seismic elastic
waves, fractures can also trap and guide waves and the behavior of such waves may prove
useful for probing the geometrical and mechanical properties of the fractures. In the longwavelength
limit, when the size of the seismic wavelength is much larger than the layer
and/or fracture spacing, the propagation velocity is obtained by the effective medium theory.
However, when the wavelength becomes smaller, a dispersive behavior is obtained that may
be significantly affected by the layer and fracture spacing.
In the proposed paper a dynamic homogenization technique proposed by the Authors to
analyze dispersive waves in periodic elastic materials (Bacigalupo & Gambarotta, 2012) is
revised and extended to the analysis of dispersive waves in periodically layered fractured
rock masses. The obtained results for some material meso-structures by means of the
proposed approach are compared to those ones by the rigorous Floquet-Bloch theory.
Finally, some examples representative of rock masses are presented and discussed.
UR  - http://eprints.imtlucca.it/2529/
ER  -