Determinación de la capacidad de carga en cimentaciones superficiales sobre bases estratificadas en suelos friccionales
Fecha
2017-07
Autores
Quesada González, Liset
Título de la revista
ISSN de la revista
Título del volumen
Editor
Universidad Central ¨Marta Abreu¨ de Las Villas. Facultad de Construcciones. Departamento de Ingeniería Civil.
Resumen
La capacidad de carga en suelos con comportamiento friccional puro apoyados en bases no homogéneas se determinó empleando las formulaciones propuestas por la Norma Cubana para el diseño geotécnico de cimentaciones superficiales y las de Meyerhof y Hanna, como métodos analíticos, estos resultados se compararon con la modelación 3D mediante el software Abaqus/CAE Versión 6.14. Para conformar los casos de estudio se tomaron cinco muestras de suelo con características físico-mecánicas diferentes y se varió el espesor del primer estrato de cuatro formas diferentes (B/4, B/2, B y 1,5B)
La aplicación del Método de los Elementos Finitos y su implementación computacional constituye una herramienta alternativa en la modelación computacional de cimentaciones superficiales apoyadas en bases no homogéneas y su fiabilidad ha sido probada en los últimos años. Su aplicación a un número representativo de muestras con condición de carga vertical centrada sobre suelos friccionales, permitió obtener valores de capacidad de carga que se asemejan más a la realidad que los obtenidos por los métodos analíticos. Estos resultados permiten considerar la posibilidad de introducir un coeficiente en la expresión de capacidad de carga de la Norma Cubana para el diseño geotécnico de cimentaciones superficiales que tome en consideración el efecto del confinamiento cuando el estrato superior es blando y de espesor menor que B.
The bearing capacity in soils with granular behavior supported on layered bases was determine using the formulations proposed by the Cuban Standard for geotechnical design of shallow foundations and Meyerhof and Hanna as analytical methods; those results were compare with the ones from the 3D modelling with the software Abaqus/CAE. In order to conform the study cases, the thickness of the first stratum was vary in four different forms (B/4, B/2, B and 1,5B) The application of the Finite Element Method and its computational implementation is an alternative tool in the computational modeling of shallow foundations supported in layered soils and its reliability has been tested in recent years. Its application to a representative number of samples with vertical load condition on granular soils, allowed to obtain values of bearing capacity that more closely resemble the reality than those obtained by analytical methods. These results allow to consider the possibility of introducing a coefficient in the expression of the Cuban Standard for the geotechnical design of shallow foundations that takes into account the effect of confinement when the upper layer is soft and of thickness less than B.
The bearing capacity in soils with granular behavior supported on layered bases was determine using the formulations proposed by the Cuban Standard for geotechnical design of shallow foundations and Meyerhof and Hanna as analytical methods; those results were compare with the ones from the 3D modelling with the software Abaqus/CAE. In order to conform the study cases, the thickness of the first stratum was vary in four different forms (B/4, B/2, B and 1,5B) The application of the Finite Element Method and its computational implementation is an alternative tool in the computational modeling of shallow foundations supported in layered soils and its reliability has been tested in recent years. Its application to a representative number of samples with vertical load condition on granular soils, allowed to obtain values of bearing capacity that more closely resemble the reality than those obtained by analytical methods. These results allow to consider the possibility of introducing a coefficient in the expression of the Cuban Standard for the geotechnical design of shallow foundations that takes into account the effect of confinement when the upper layer is soft and of thickness less than B.
Descripción
Palabras clave
Capacidad de Carga, Cimentaciones Superficiales, Suelos Estratificados, Suelos Friccionales, Confinamiento, Bearing Capacity, Shallow Foundations, Layered Soils, Granular Soils, Confinement