Título: | NUMERICAL SIMULATION OF FRACTURE PROCESSES IN CONCRETE STRUCTURES COMBINING THE DISCRETE AND THE SMEARED APPROACHES | ||||||||||||
Autor: |
RICARDO AMORIM EINSFELD |
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Colaborador(es): |
LUIZ FERNANDO CAMPOS RAMOS MARTHA - Orientador |
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Catalogação: | 09/NOV/2001 | Língua(s): | PORTUGUESE - BRAZIL |
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Tipo: | TEXT | Subtipo: | THESIS | ||||||||||
Notas: |
[pt] Todos os dados constantes dos documentos são de inteira responsabilidade de seus autores. Os dados utilizados nas descrições dos documentos estão em conformidade com os sistemas da administração da PUC-Rio. [en] All data contained in the documents are the sole responsibility of the authors. The data used in the descriptions of the documents are in conformity with the systems of the administration of PUC-Rio. |
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Referência(s): |
[pt] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=2081&idi=1 [en] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=2081&idi=2 |
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DOI: | https://doi.org/10.17771/PUCRio.acad.2081 | ||||||||||||
Resumo: | |||||||||||||
This work consists of the development of a model for
numerical fracture simulation of concrete structures using
the Finite Element Method and concepts of Fracture
Mechanics applied to concrete.The most important
characteristic of the simulation is the transition from the
smeared to the discrete approach as the strain localizes in
a certain region of the structure. With this method
it is possible to take advantage of the main
characteristics of the two approaches and, at the same
time, eliminate some of their disadvantages.The simulation
is supported by a pre-processor for automatic finite
element mesh generation and by a sophisticated topology-
based data structure that assures mesh consistency.
The discrete crack is introduced into a plastic region
selected by the program, and only this region is remeshed
after crack propagation. All the process is monitored
through the same user interface.The smeared analysis is
developed through a non-associated plastic model which poses
some numerical difficulties when tracing the behavior of
the structure close to the peak and in the post-peak
regime. A numerical solution is proposed to avoid these
difficulties.
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