000012256 001__ 12256
000012256 005__ 20141205160035.0
000012256 04107 $$aeng
000012256 046__ $$k2008-10-12
000012256 100__ $$aZabala, Francisco
000012256 24500 $$aSeismic Analysis of Earthdams Using a Lagrangian Particle Method.

000012256 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000012256 260__ $$b
000012256 506__ $$arestricted
000012256 520__ $$2eng$$aSeismic safety of earth or rockfill dams and embankments is strongly conditioned by permanent displacements caused by earthquakes. For a severe earthquake, the permanent displacement pattern results from the combination of displacements generated by volumetric and shear plastic strains distributed within the structure, and those caused by sliding of a soil mass along a failure surface. Numerical procedures commonly used in practice do not consider the strain localization phenomena at failure surfaces and the associated mesh dependence of the solution. Typically, nonlinear finite element or finite difference codes yield an estimate of distributed deformations and dynamic response, without accounting for the plastic strain localization problem. In addition, some of the numerical approaches used in practice do not consider the configuration change caused by large displacements. The material point method or MPM is a lagrangian “particle-mesh” numerical method. It has been previously used in modeling dynamic problems with large displacements and strain localization. With MPM, a body is discretized into a collection of lagrangian particles, which carry all the data needed to define the body’s state. Interaction between particles takes place in a background fixed mesh, similar to those used in the finite element method. The MPM is applied in this paper to model the dynamic response of a concrete faced gravel dam with increasing base movements. A comparison of the MPM displacement results with a simplified Newmark sliding block analysis is presented. The examples show that the MPM is a useful tool to assess the seismic safety of earth and rockfill structures.

000012256 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000012256 653__ $$aMPM, plastic strain localization, earth dams

000012256 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000012256 720__ $$aZabala, Francisco$$iRodari, Rubén D.$$iOldecop, Luciano O.
000012256 8560_ $$ffischerc@itam.cas.cz
000012256 8564_ $$s1536465$$uhttps://invenio.itam.cas.cz/record/12256/files/S13-020.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: S13-020.
000012256 962__ $$r9324
000012256 980__ $$aPAPER