[en] The dynamic response of a power plant building on deeply embedded foundations to excitation by earthquake is investigated in this analysis. The building and soil structures can be simulated by a mathematical model using two-dimensional finite elements. Non-linear soil material and linear building properties were assumed for dynamic analysis. Comparison of the foundation response spectra determined by non-linear analysis shows decreasing accelerations in the lower frequency range, which has a favourable effect on power plant building and component dimensions. Plastic areas which form under the foundation slab over a period of time are also investigated. (Auth.)