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Título del libro: From Fundamentals To Applications In Geotechnics
Título del capítulo: A Behavior Model for a Rockfill; An Application to Settlements calculations for ``La Yesca'' Dam

Autores UNAM:
CARMELINO ZEA CONSTANTINO;
Autores externos:

Idioma:

Año de publicación:
2015
Palabras clave:

Behavior Models; Rockfill; Settlements; Dams; Instrumentation


Resumen:

The Juarez-Badillo's Principle of Natural Proportionality establishes a relationship between natural strain and deviator stress, however in this work that principle is applied in a slightly different way, since strain is associated with the secant modulus in such a way that, by solving the corresponding differential equation, it is possible to unify the two branches of pre-peak and post-peak stress-strain curves in a single equation which depends on three parameters; the initial tangent modulus, the deviator stress failure in post-peak branch and the third, called by the authors ``ductility exponent,'' which controls the ``form'' and allows the description of the ``decay'' of the post-peak stress-strain curve. The proposed model allows the fitting the experimental stress-strain curves and secant modulus against axial deformation of different rockfills that were employed in the construction of the rockfill dam named ``La Yesca''. Taking into account the low strain level of experimental tests due to devices limitations, in all tested materials was adopted a value of psi = 2. The model was applied to settlements calculations of ``La Yesca'' dam using a commercial finite element program with light modifications in order to accommodate the proposed behavior model, and thus obtaining good results.


Entidades citadas de la UNAM: