Prediction of seismic displacement of dry mountain slopes composed of a soft thin uniform layer

摘要: Abstract In this paper, the earthquake-induced permanent seismic displacement of dry mountain slopes is calculated from a series two-dimensional dynamic nonlinear finite difference analyses. The considered are composed thin, soft, uniform soil layer underlain by an inclined bedrock parallel to slope. material properties soil, thickness layer, and slope inclination angles varied. Equivalent acceleration time histories at potential sliding surfaces derive amplification factors, Newmark block analysis used calculate displacements. displacements compared with those predicted empirical models. results show that soft layers shear wave velocity less than or equal 200 m/s cannot be modeled as rigid because under strong ground motions will greatly overestimated. prediction significantly enhanced if flexible mass characteristics accounted for. A new model, which uses multiple motion parameters, shown provide reliable estimate displacement. success rate model predict landslide hazard category ranges 52 88.3%.