A coupled stick-slip-rotation model for earthquake-induced sliding displacement of slopes in Iran

This paper presents a semi-empirical model to predict earthquake-induced displacement of slopes, based on acoupled stick-slip-rotation (CSSR) analysis recently developed by the authors in a preceding study. The earthquake database selected for the analyses was constituted of 3319 records (including two horizontal components)of ground accelerations associated with 461 earthquakes that occurred in Iran. The presented predictive modelwas developed by the multiple regression analyses and represents sliding displacement as a function of themaximum velocity coefficient-time history ðkv maxÞ, yield acceleration coefficient (ky), slip length (L), and periodratio ðTs=TmÞ. The conditions of efficiency, sufficiency, and predictability of the seismic parameters have indicated that kv max is the best choice satisfying these conditions to be used in the predictive model compared withthe other intensity measures. A semi-empirical equation has been proposed to assure the predictability conditionof kv max. Performance of the presented semi-empirical model is evaluated by comparing its predictions with afew selected regional and global models recently proposed for sliding displacement of slope