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CALCULATION OF NONLINEAR GROUND RESPONSE IN EARTHQUAKES (1975)

A method is presented for calculating the seismic response of a system of
horizontal soil layers. The essential element of the method is a rheological model suggested by Iwan which takes account of the nonlinear hysteretic behavior of soils and has considerable flexibility for incorporating laboratory results on the dynamic behavior of soils.
Reference:
Bulletin of the Seismological Society of America. Vol. 65, No. 5, pp. 1315-1336. October 1975
Organization:
U.S. Geological Survey, Menlo Park, CA
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