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Bulletin of the Seismological Society of America; February 1972; v. 62; no. 1; p. 177-194
© 1972 Seismological Society of America
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Seismic response effects on embedded structures

JAMES C. ANDERSON

SARGENT & LUNDY ENGINEERS, CHICAGO, ILLINOIS 60603

Abstract

The finite-element method is used to evaluate the effect of soil-structure interaction on the seismic response of embedded structural systems. The system considered is representative of a nuclear power station located on a multilayered, elastic medium. Effects of structure stiffness, rock motions, and soil properties are considered. Results are presented in terms of foundation acceleration spectra.

Results show that the inclusion of soil-structure interaction can amplify the free-field spectrum in certain frequency ranges while suppressing it in others. It is suggested that an uncoupled soil-structure model together with a rocking spring and a modified design spectrum be used to evaluate the seismic design requirements of nuclear power stations located on various soil sites.






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