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SISTEMA INTEGRAL DE INFORMACIÓN ACADÉMICA - PÚBLICO
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: 2015Palabras clave:
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.