Abstract
The response of mass-on-rough-plane model to both horizontal and vertical excitations is studied statistically. The critical acceleration envelope is defined for a potential sliding surface of a structure as the locus of input acceleration that mobilizes limit resistance against slippage. A method to determine the model parameters with critical acceleration envelope is proposed. Slip displacements are computed with 52 sets of strong motion records and regressed against JMA magnitude, focal distance, peak values and spectral moments of accelerograms. The analytical prediction by Igarashi is compared in a good agreement with the computed slip displacements.
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