Contribución y estudio preliminar del fenómeno de la retracción en el hormigón masivo a partir de la modelación numérica
Fecha
2017-06
Autores
Padrón Manzano, Michel
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Editor
Universidad Central "Marta Abreu" de Las Villas. Facultad de Construcciones. Departamento de Ingeniería Civil.
Resumen
En este trabajo se realiza un estudio preliminar del comportamiento tenso-deformacional de probetas de hormigón producto del fenómeno de la retracción en edades tempranas.
El método utilizado para estudiar dicho comportamiento es la simulación numérica del ensayo de retracción lineal. Esta simulación se realiza mediante el software de propósitos generales ABAQUS, que está sustentado sobre la base del Método de los Elementos Finitos (MEF). Se plantean las bases metodológicas para la simulación del ensayo pudiéndose ejemplificar: la modelación de la geometría y del material, la incorporación del fenómeno de la retracción en el modelo de elementos finitos mediante el uso de las subrutinas de usuario y validación del modelo numérico a partir de ensayos experimentales.
Es notable como se obtiene una adecuada correspondencia entre la respuesta físicomecánica de la probeta virtual y la del ensayo experimental de referencia, que ha permitido entre otros aspectos, validar la utilización del Método de los Elementos Finitos con fines de estudiar el comportamiento tenso-deformacional y además poder apreciar estos fenómenos que no pueden ser observados en los experimentos reales, aspecto de vital importancia porque permite utilizar la modelación numérica vinculada con la experimentación existente como una herramienta poderosa para el estudio del hormigón.
In this work a preliminary study of the tense-deformational behavior of concrete specimens produced by the phenomenon of shrinkage in early ages is carried out. The method used to study such behavior is the numerical simulation of the linear shrinkage test. This simulation is performed using ABAQUS general purpose software, which is based on the Finite Element Method (FEM). The methodological bases for the simulation of the test are presented, being able to exemplify: the geometry and material modeling, the incorporation of the phenomenon of shrinkage in the finite element model through the use of user subroutines and validation of the numerical model from of experimental test. It is remarkable how an adequate correspondence between the physical-mechanical response of the virtual test tube and the experimental reference test is obtained, which has allowed, among other aspects, to validate the use of the Finite Element Method for the purpose of studying the tense- deformational and also to be able to appreciate these phenomenon that can not be observed in the real experiments, aspect of vital importance because it allows to use the numerical modeling linked with the existent experimentation as a powerful tool for the study of the concrete.
In this work a preliminary study of the tense-deformational behavior of concrete specimens produced by the phenomenon of shrinkage in early ages is carried out. The method used to study such behavior is the numerical simulation of the linear shrinkage test. This simulation is performed using ABAQUS general purpose software, which is based on the Finite Element Method (FEM). The methodological bases for the simulation of the test are presented, being able to exemplify: the geometry and material modeling, the incorporation of the phenomenon of shrinkage in the finite element model through the use of user subroutines and validation of the numerical model from of experimental test. It is remarkable how an adequate correspondence between the physical-mechanical response of the virtual test tube and the experimental reference test is obtained, which has allowed, among other aspects, to validate the use of the Finite Element Method for the purpose of studying the tense- deformational and also to be able to appreciate these phenomenon that can not be observed in the real experiments, aspect of vital importance because it allows to use the numerical modeling linked with the existent experimentation as a powerful tool for the study of the concrete.
Descripción
Palabras clave
Comportamiento Tenso-deformacional, Simulación Numérica, Retracción Lineal, Método de Elementos Finitos (MEF), Software ABAQUS, Hormigón Masivo