[pt] Este trabalho consiste no desenvolvimento de um modelo
numérico para simular o fraturamento em estruturas de
concreto. Como ferramentas principais são utilizados o
Método dos Elementos Finitos (MEF) e alguns conceitos da
Mecânica da fratura aplicada ao concreto.
A principal palavra-chave que caracteriza este trabalho é
o -elemento de interface-. Este elemento finito permite
modelar descontinuidades na malha de elementos finitos
entre as arestas dos elementos. Neste trabalho, estes
elementos são utilizados para representar fissuras em
estruturas de concreto. A modelagem destas fissuras é
suportada por um conceito de fissura discreta, o qual está
acoplado a um modelo constitutivo elástico com
amolecimento, específico para a fissura ou para o elemento
de interface.Neste trabalho, as análises não-lineares
abrangeram sistemas estruturais com modo de fraturamento I. / [en] This work consists in the development of a numerical model
in order to simulate the fracture process in concrete
structures. This model is supported by concepts of the
Finite Element Method and the Fracture Mechanics applied to
concrete. The main keyword which characterizes this work is
interface element. This finite element permits the
modelling of discontinuities in the finite element mesh
among the edges of the elements. In this work, these
elements are used to represent cracks in concrete
structures. The cracks modelling is supported by the
discrete crack concept, which is associated to a
constitutive model called elastic-softening, specific for
the crack or for the interface element. In this work, the
nonlinear analyses were limited to structural systems under
fracture mode I.This work consists in the development of a
numerical model in order to simulate the fracture process
in concrete structures. This model is supported by concepts
of the Finite Element Method and the Fracture Mechanics
applied to concrete. The main keyword which characterizes
this work is interface element. This finite element
permits the modelling of discontinuities in the finite
element mesh among the edges of the elements. In this work,
these elements are used to represent cracks in concrete
structures. The cracks modelling is supported by the
discrete crack concept, which is associated to a
constitutive model called elastic-softening, specific for
the crack or for the interface element. In this work, the
nonlinear analyses were limited to structural systems under
fracture mode I.This work consists in the development of a
numerical model in order to simulate the fracture process
in concrete structures. This model is supported by concepts
of the Finite Element Method and the Fracture Mechanics
applied to concrete. The main keyword which characterizes
this work is interface element. This finite element
permits the modelling of discontinuities in the finite
element mesh among the edges of the elements. In this work,
these elements are used to represent cracks in concrete
structures. The cracks modelling is supported by the
discrete crack concept, which is associated to a
constitutive model called elastic-softening, specific for
the crack or for the interface element. In this work, the
nonlinear analyses were limited to structural systems under
fracture mode I. / [es] Este trabajo consiste en el desarrollo de un modelo
numérico para simular fracturas en extructuras de concreto.
Se utilizan como herramientas principales el Método de los
elementos Finitos (MEF) y algunos conceptos de la Mecánica
de la fractura aplicada al concreto. La principal palabra
clave que caracteriza este trabajo es el -elemento de
interfaz-. Este elemento finito permite modelar
discontinuidades en la malla de elementos finitos entre las
aristas de los elementos. En este trabajo, los elementos
son utilizados para representar fisuras en extructuras de
concreto. El modelo de estas fisuras se soporta por un
concepto de fisura discreta, que está acoplado a un modelo
constitutivo elástico, específico para la fisura o para el
elemento de interfaz. En este trabajo, los análisis no
lineales consideran sistemas extructurales con modo de
fractura I.
| Identifer | oai:union.ndltd.org:puc-rio.br/oai:MAXWELL.puc-rio.br:1922 |
| Date | 05 September 2001 |
| Creators | GIVANILDO ALVES DE AZEREDO |
| Contributors | DEANE DE MESQUITA ROEHL, JOSE NAPOLEAO FILHO |
| Publisher | MAXWELL |
| Source Sets | PUC Rio |
| Language | Portuguese |
| Detected Language | English |
| Type | TEXTO |
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