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Título del libro: 12th International Conference On Computer Methods And Advances In Geomechanics 2008
Título del capítulo: Influence of concrete interface friction on the seismic performance of fractured concrete dams

Autores UNAM:
BOGART CAMILLE MENDEZ URQUIDEZ; EDUARDO BOTERO JARAMILLO; MIGUEL PEDRO ROMO ORGANISTA;
Autores externos:

Idioma:

Año de publicación:
2008
Palabras clave:

Concrete interface; Concrete-concrete; Continuous friction models; Coulomb frictions; Finite difference; Friction models; Friction variation; Hydrodynamic pressure; Laboratory measurements; Relative displacement; Seismic Performance; Shaking table experiment; Sliding friction; Uplift forces; Upstream face; Variable frictions; Concrete dams; Geomechanics; Hydrodynamics; Research laboratories; Tribology; Friction


Resumen:

Shaking table experiments were carried out on concrete-concrete interfaces to develop a continuous friction model, which was validated by implementing it in the commercial finite difference code FLAC3D to reproduce laboratory measurements of displacements with it. The analyses showed that constant and Coulomb friction underestimate laboratory measurements. Once validated, the friction model was used in a numerical FLAC3D example of a fractured concrete dam to investigate the influence of friction variation on the permanent relative displacements of a hypothetical detached block. The analysis considered hydrodynamic pressures on the upstream face of dam as well as uplift forces at the crack. Results showed that the variable friction model yielded larger displacements as compared to constant and Coulomb friction, leading to conservative (safe) predictions.


Entidades citadas de la UNAM: