000009599 001__ 9599
000009599 005__ 20141205150222.0
000009599 04107 $$aeng
000009599 046__ $$k2008-10-12
000009599 100__ $$aBurman, A.
000009599 24500 $$aInfluence of Material Nonlinearity of Foundation in the Dam Foundation Interaction Analysis

000009599 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000009599 260__ $$b
000009599 506__ $$arestricted
000009599 520__ $$2eng$$aThe effects of material nonlinearity of the foundation domain have been investigated in connection with the iterative analysis procedures of soil-structure interaction problems. For the purpose of analysis, a concrete gravity dam has been selected as the structure. An algorithm for the iterative analysis of SSI problems has been proposed and verified with the published results. The effects of different impedance ratios (the ratio of foundation stiffness and dam stiffness) have been investigated in some details in the present paper. The dam has been modeled as linear, elastic material. The foundation material has been modeled as both linear, elastic material and nonlinear elastic material. The widely known Duncan-Chang soil model has been chosen to represent the nonlinear material behavior of soil/rock foundation. The comparison of results of the interaction analysis for the linear foundation with those of the nonlinear foundation has been presented. The results clearly display pronounced effects of displacements and stresses for the structure compared to the case when both dam and foundation are assumed to be composed of linear, elastic materials. For the time integration of the dynamic equation of motion, the implicit-explicit Newmark scheme has been adopted. The results clearly emphasize the need for the consideration of a proper nonlinear treatment of the foundation material during the soil-structure interaction analysis, especially when the structure is subjected to severe ground motion during any earthquake.

000009599 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000009599 653__ $$aKoyna gravity dam, earthquake excitation, dam-foundation interaction, material nonlinearity, nonlinear elastic Duncan-Chang model. 

000009599 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000009599 720__ $$aBurman, A.$$iChakravarty, D.$$iMaity, D.
000009599 8560_ $$ffischerc@itam.cas.cz
000009599 8564_ $$s176255$$uhttps://invenio.itam.cas.cz/record/9599/files/S13-038.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: S13-038.
000009599 962__ $$r9324
000009599 980__ $$aPAPER