الفهرس 
Seismic Response on Soils and StructuresOnly 14 pages are availabe for public view
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Abstract
This thesis investigates the effect of the structure embedment on the
seismic response of structures. The full interaction between bedrock
motion, subsurface soil, substructure (basement floors) and superstructure
(aboveground floors) has been represented as a dynamic soil-structure
interaction problem using the finite element method. Nonlinear behavior
of soil has been taken into account considering change of soil stiffness
and damping ratio as a function of shear strain level, confining pressure
and plasticity index using Ishibashi and Zhang equation (1993). An
enhanced finite element computational model has been prepared to
’simulate the studied problems. These models covered different varieties
of aboveground floors (three, five, seven and twelve floors) and basement
floors (three, two, one and no basement floors). The analysis was
performed through an advanced two-dimensional model to simulate the
three-dimensional interaction. Extensive parametric study has been
carried out including wide range of cohesive and cohesion-less soil types.
The study included determination and examination of natural frequency
changes and developed straining actions at the structural elements.