The static and dynamic friction offered by different geosynthetic/geosynthetic interfaces has a very important role in the analysis of landfill behaviour, for which reason the use of geosynthetics is increasing more and more. In the present paper some interfaces including geomembranes, geotextiles and geosynthetic clay liners (GCL) are investigated by means of shaking table tests, using the shaking table available at the University of Catania. The dynamic horizontal excitation is a sinusoidal variable input, for which the effects of the maximum amplitude and the frequency content are investigated. Moreover, a time-history accelerogram, recorded in Catania during the 13 December, 1990 earthquake, is used as input excitation. The experimental results are reported in terms of time-histories of accelerations and relative displacements, in order to investigate the acceleration transfer through the interface and the geosynthetic/geosynthetic relative displacement.
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