ABSTRACT
The frequency-domain transmitting boundary for the axisymmetrical quadrilateral finite element in cylindrical coordinates is presented. It is integrated in a finite element program to calculate the dynamic soil—structure interaction in the frequency domain. The accuracy of the solution is checked by comparing the dynamic stiffness of circular foundation with the solution found in literature. For two different types of structures — the nuclear reactor building and the cooling tower — soil—structure interaction has been investigated. For the nuclear reactor building, two simplified analyses are carried out in order to perform influence of soil properties to dynamic response. Also, some results of the more sophisticate soil—structure interaction analysis of the cooling tower founded on piles using sub-structure method, with appropriate boundary conditions in the time domain are presented.
The displacement and rocking of the rigid nuclear structure founded on the soft layer excite the displacement and rocking of the structure founded on the stiff one. The response of the cooling tower is not significantly affected by the dynamic properties of the foundation.
