Prediction of seismic slope displacements by dynamic stick-slip analyses

Ausilio, E;Costanzo, A;Silvestri, F.;TROPEANO, GIUSEPPE

2008-01-01

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Abstract

A good working balance between simplicity and reliability in assessing seismic slope stability is represented by displacement-based methods, in which the effects of deformability and ductility can be either decoupled or coupled in the dynamic analyses. In this paper, a 1D lumped mass stick slip model is developed, accounting for soil heterogeneity and non linear behaviour, with a base sliding mechanism at a potential rupture surface. The results of the preliminary calibration show a good agreement with frequency-domain site response analysis in no-slip conditions. The comparison with rigid sliding block analyses and with the decoupled approach proves that the stick-slip procedure can result increasingly unconservative for soft soils and deep sliding depths. © 2008 American Institute of Physics.