الفهرس 
LITERATURE REVIEW
THE STUDIED PARAMETERSOnly 14 pages are availabe for public view
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Abstract
When structures in direct contact with ground, like building, tunnels and bridge foundations exposed to Earthquake forces, this forces applied externally to the elements of the structures or develop internally in the ground, both of the structure and the ground in fact deform and move in a compatible manner, and this because of the dependency of each other as a result of their intimate physical contact. Problems like these are referred to as dynamic soil structure interaction (DSSI) problems.
This thesis studies the effect of soil on the dynamic behavior of structures. Full interaction between soil, substructure and superstructure are represented as a Dynamic Soil-Structure Interaction (DSSI)problem, using the finite element method (MIDAS GTS program). Nonlinear behavior of soil is taken according to Mohr coulomb theory a damping ratio. El Centro earth quake have been used to predict the effects of DYNAMIC SOIL-STRUCTURE INTERACTION (DSSI). comparison between the results of the sophisticated full interaction model and the simplified models (either using springs or hinged supports) is illustrated, the base shear and although the internal forces due to seismic excitation of sophisticated full interaction model is less than the base shear and internal forces of simplified models (either using springs or hinged supports) as expected, also axial force Bending moment and the shear force diagrams of the sophisticated full interaction model are more realistic than of simplified models.