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NEW TRENDS IN SEISMIC DESIGN OF STRUCTURES
Edited by: N.D. Lagaros, Y. Tsompanakis and M. Papadrakakis
Advances in Seismic Slope Stability Analysis of Earth Structures
Y. Tsompanakis1, V. Zania2 and P.N. Psarropoulos3
1School of Environmental Engineering, Technical University of Crete, Greece
Y. Tsompanakis, V. Zania, P.N. Psarropoulos, "Advances in Seismic Slope Stability Analysis of Earth Structures", in N.D. Lagaros, Y. Tsompanakis and M. Papadrakakis, (Editors), "New Trends in Seismic Design of Structures", Saxe-Coburg Publications, Stirlingshire, UK, Chapter 14, pp 429-456, 2015. doi:10.4203/csets.37.14
Keywords: slope stability, permanent deformation, base sliding, seismic distress, geosynthetics.
Seismic slope stability assessment of earth structures is a crucial issue. However the current practice is primarily focused on simplified procedures, which evaluate either the factor of safety or the seismic slope displacements. In this work after a short description of the existing methods, an advanced decoupled method was applied and the seismic coefficients and displacements were calculated for two types of failure surfaces after an extensive parametric study. The results indicate that a seismic coefficient spectrum for circular failure surfaces, based on the accepted seismic displacements may be produced. Moreover, coupled analyses of a SDOF system with sliding potential along its base (models commonly used to simulate base sliding) reveal some important aspects of their seismic performance. Finally, base sliding appears to be a rather complicated issue dependent on several parameters including the geostatic stress field, and it is related to seismic distress of geosynthetic layers placed along the base of earth structures.
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