Predictive model for seismic sliding displacement of slopes based on a coupled stick-slip-rotation approach

This paper represents a predictive model for the earthquake-induced displacement of slopes using a coupled stick-slip-rotation approach recently proposed by the authors in a preceding paper. A collection of 1363 strong motion records associated with 25 worldwide earthquakes was used to generate the model on the basis of results of sliding block analyses. The proposed model predicts sliding displacement in terms of yield acceleration coefficient ratio (k(y)/k(max)), period ratio (T-s/T-m), and slip length (L). The regression analysis indicates that dividing the results into the smaller intervals of period ratio can provide a noticeable higher degree of accuracy. Probable bias of the residuals versus the input variables is examined in detail. Predictions of the developed equation are compared with some available sliding block equations which similarly assumed a flexible sliding mass. The proposed model can be simply used to estimate landslide hazard in seismic prone regions.