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Title: Nonlinear behaviour of soils in earthquake
Author: Shiomi, T.
ISNI:       0000 0004 2709 2275
Awarding Body: University of Wales Swansea
Current Institution: Swansea University
Date of Award: 1983
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The main objective of this thesis has been to research the non-linear dynamic behaviour of fluid saturated porous media based on the Biot's formulation. Amongst several numerical methods the irreducible compressible form, and the irreducible incompressible (penalty) form are applied for this purpose. For numerical analysis the standard Galerkin method was applied. Relevant numerical solution techniques to this two phase problem are surveyed and emphasis was placed on a stability analysis of a staggered method for n-p formulation (displacement - pore pressure formulation) which has been given up to use on the middle of our research. The u-p formulation may be efficiently adopted with an explicit method for the solid and an implicit method the for fluid in the time integration scheme. As one of the problems for the application throughout 'during-' and 'post-' earthquake response were considered and in order to solve this type of problem efficiently, a variable step scheme was developed and applied to earthquake and consolidation problems. It is reported through experimental surveys that the high concentration of pore pressure built up by earthquake motion may induce liquefaction phenomena. New elasto-plastic models were implemented and investigated for their capability and performance to simulate the liquefaction phenomenon. Several numerical solutions were presented to discuss the physical nature of fluid saturated porous media and the behaviour of the numerical algorithm. Computational and programming aspects were also discussed and brief explanations of the computer program DIANA used here was presented.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available