Influence of soil conditions on the stochastic response of asphaltic liningdams to spatially varying ground motions

Abstract

The effect of deconvolved stochastic seismic excitation on nonlinear dynamic response of dam-foundation interaction systems is investigated by using the equivalent linear method. For this purpose, three different earthquake input mechanisms which are the standard-rigid-base input model, the massless-foundation input model and the deconvolved-base-rock input model are used. The spatial variability of ground motion which is considered with the incoherence and wave-passage effects is taken into account in the analyses. The Izmit earthquake in 1999 is selected as a ground motion. Two-dimensional interface finite elements are used between the dam-soil deposit and asphalt face. The mean of absolute maximum values of displacements and stresses obtained from the three earthquake input models are compared with each other.