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Bulletin of the Seismological Society of America; June 1971; v. 61; no. 3; p. 781-787
© 1971 Seismological Society of America
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Seismic energy transmission to deep-founded structures

COLIN B. BROWN

DEPARTMENT OF CIVIL ENGINEERING UNIVERSITY OF WASHINGTON, SEATTLE, WASHINGTON 98105

Abstract

The predominant seismic energy input into structures is from Rayleigh waves. These attenuate rapidly with distance from the surface and are partially reflected and partially transmitted by a hole in the ground. A structure founded in such a hole may anticipate a smaller seismic input than a surface-founded structure. Estimates of such a reduction are given which indicate that only short buildings and material with low shear-wave velocities will provide the proper conditions for this beneficial effect.






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