2. Dynamic soil behavior
2.1 Shear modulus G and shear strain amplitude
Deformation moduli depend on the amplitude of deformation. The orders of magnitude of deformations for structures are on average between 10-4 and 10-2 whereas conventional tests (penetrometer, oedometer, conventional triaxial) give moduli representative of deformations in excess of 10-2.
For the design of structures under the action of an earthquake, knowledge of the shear modulus G in the deformation range 10-4 and 10-6 is required, as is the damping ξ.
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Dynamic soil behavior
Definition of forces applied to foundations
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