Stochastic dynamic analysis of dam-reservoir-foundatoin systems to spatially varying ground motion

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In this study it is aimed to perform the stochastic dynamic analysis of dam-reservoir-foundation systems to spatially varying earthquake ground motion by using Lagrangian approach. Since significant variation of earthquake ground motion exists over the base dimensions of large structures such as dams, spatially varying effects of the ground motion including wave passage effects, incoherence effects and site response effects should be taken into account in the analysis of dams. For that reason, variable number-nodes two dimensional isoparametric fluid finite elements are programmed in FORTRAN language and incorporated into a general-purpose computer program for stochastic dynamic analysis of structure systems to spatially varying earthquake ground motion, SVEM, and named as SVEMF. This Ph.D. thesis in which stochastic dynamic responses of dam-reservoir-foundation systems to spatially varying earthquake ground motion are determined consists of four main chapters.
The first chapter includes literature investigation and formulations of stochastic dynamic analysis of fluid-structure-soil interaction systems by Lagrangian approach. In the second chapter, developed computer program is introduced and modal analysis of a rigid fluid tank and fluid-structure interaction system which are modelled by finite element method are performed to verify the developed program. In addition to, the finite element model of the dam-reservoir-foundation system and earthquake ground motion which is chosen are given in this section. In third chapter, the mean of maximum response values and variances obtained from the stochastic analysis of dam-reservoir-foundation system to spatially varying ground motion are discussed in detail. The conclusions of the research and recommendations for the future works are given in the fourth chapter.
As a result, it is focused that spatially varying earthquake ground motion should be taken into account in the stochastic dynamic analysis of dam-reservoir-foundation systems.

Yasemin Bayram
Değişerek yayılan yer hareketi etkisindeki baraj-rezervuar-zemin sistemlerinin stokastik dinamik analizi · 2008 · 204 sayfa.
Danışman: Prof. Dr. Alemdar Bayraktar
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