Título: | STRUT AND TIE MODELS THROUGH TOPOLOGICAL OPTIMIZATION TECHNIQUES | ||||||||||||
Autor: |
RICARDO OLIVEIRA |
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Colaborador(es): |
LUIZ ELOY VAZ - Orientador MARTA DE SOUZA LIMA VELASCO - Orientador |
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Catalogação: | 29/MAR/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=1407&idi=1 [en] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=1407&idi=2 [es] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=1407&idi=4 |
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DOI: | https://doi.org/10.17771/PUCRio.acad.1407 | ||||||||||||
Resumo: | |||||||||||||
Strut and tie models are ultimately discrete
representations of the stress fields in the
structural elements of reinforced concrete close to failure
and they are meant to help the
engineer to design a consistent project of all structural
elements.
This work aims to develop a program of topological
optimisation that generates and
allows the visualisation of a strut and tie model for
structural elements of reinforced concrete.
The generated model helps the project engineer to
understand the load paths inside the
element.
Initially the user should have as data a refined finite
element mesh. Starting from this
point the program calculates the stress fields through a
linear elastic finite element analysis.
The techniques used for topological optimisation in this
work are namely the hard-kill
method and the method of removal. In the first process, the
elements with low stress levels,
that are not being used efficiently, have their elasticity
modules abruptly reduced, while in
the method of removal, these elements are removed from the
mesh. Either to modify the
elasticity module of the element or to remove the element
from the mesh the principal stresses
in each element are compared with a reference stress
defined as a fraction of the largest
principal stress in the mesh. If the principal stress in
the element is smaller than this above
mentioned reference stress the element has its elasticity
module modified or is removed,
depending on the method.
The distribution of stresses in the elements can be
followed by the user through the
module of visualisation of the program and the process of
topological optimisation is repeated
until the specified convergence criterion is reached.
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