Effects of asynchronous ground motion on the equivalent seismic coefficient of a slope

This work aimed to investigate the effects generated by higher-order asynchronous vibration modes on slope stability. The problem was posed in terms of a search for the geometrical and mechanical factors of a slope that enhance asynchronous motion generated by activating vibration modes of a higher order, with a view to determining an equivalent seismic coefficient. The slope was subjected to standard single-frequency harmonic signals and natural accelerograms selected from a database. The paper discusses the results of a set of analyses on a homogeneous slope with linear visco-elastic behavior.