Program DynaPile was developed to compute the dynamic stiffness of single piles or pile groups. The piles can be either floating piles or end-bearing piles. Vertical, horizontal and rocking dynamic stiffnesses will be generated by the program. The program will also generate the group reduction factors for pile groups under small excitation conditions. The method of computation is based on the consistent boundary-matrix method proposed by Blaney, Kausel and Roesset (1976).
Pile foundations were analyzed for some time neglecting interaction effects betwwen the piles through the soil and enforcing only compatibility of displacements at their heads under the assumption of a rigid mat. The dynamic model, which takes into account the whole soil medium in the analysis, can conveniently provide information about group-reduction factors of pile foundations if the soil properties are adjusted to account for the effective level of strains.
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