Dynamic analysis of soil-structure interaction problems using hexahedral finite elements with reduced integration

Resumo

In the present work, a numerical simulation is performed to obtain the soil influence on the dynamic
response of structures under cyclic loading. The spatial discretization of the soil and the structure is carried out
here by employing hexahedral isoparametric elements with reduced integration and an efficient technique is
employed for controlling the so-called hourglass modes. The load transfer between the soil and the structure is
performed by a three-dimensional contact algorithm based on the penalty method formulation, where small
interpenetrations can occur between the deformable bodies in contact. A corotational approach at element level
is used to deal with physically and geometrically nonlinear analysis, where the physical nonlinearity is due to the
elastoplastic behavior of the materials employed. Dynamic equilibrium equation is solved using the Newmark’s
method and the Generalized-α method. Numerical examples are performed and compared with predictions
obtained by the software ANSYS in order to verify the present algorithm.