SURFACE STRAINS ASSOCIATED WITH STRONG EARTHQUAKE SHAKING

Abstract

Method of Lee and Trifunac (1985; 1987) for the synthetic generation of translational, torsional and rocking accelerograms has been generalized to enable computation of strains at ground surface during passage of strong earthquake ground waves. Variations of strain with time resemble ground velocity components in corresponding directions. The Fourier spectrum amplitudes of strain are proportional to the spectrum amplitudes of the corresponding velocity components divided by the representative phase velocities.