Soil-structure interaction analysis of HTTR building by a finite element model

In this paper, the applicability of the simplified model (sway-rocking model with the embedment effect) for dynamic response evaluation of the embedded HTTR structure is examined by comparing the results with those by a detailed model using finite element method (FEM). In the FEM modelling, the structure is modeled into the beams with lumped masses, and the soil is modeled as two dimensional finite elements. This model has the wave transmitting boundary for the side and the viscous boundaries for the bottom and the surfaces of out-of-plane. Earthquake response of the structure obtained by the finite element model is compared with that by the simplified model. As a result, the maximum response values and the floor response spectra by the finite element model are nearly equal to or a little smaller than those by the simplified model. It may be concluded that the simplified model is applicable to the dynamic response analysis of the embedded HTTR structure for the evaluation of the design seismic forces. (author). 4 refs, 9 figs, 1 tab