Título: | BUCKLING ANALYSIS OF LONGITUDINAL REINFORCEMENT IN CONCRETE COLUMNS | ||||||||||||||||||||||||||||||||||||||||
Autor: |
SALETE SOUZA DE OLIVEIRA BUFFONI |
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Colaborador(es): |
RAUL ROSAS E SILVA - Orientador |
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Catalogação: | 27/SET/2004 | 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=5517&idi=1 [en] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=5517&idi=2 |
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DOI: | https://doi.org/10.17771/PUCRio.acad.5517 | ||||||||||||||||||||||||||||||||||||||||
Resumo: | |||||||||||||||||||||||||||||||||||||||||
Buckling of longitudinal reinforcement in reinforced
concrete columns may
occur in the region between two consecutive ties, or may
involve a number of ties.
The existing design code specifications do not provide an
appropriate
methodology for the design of the transversal reinforcement
in different situations.
The main objective of the present work is to develop a
formulation to allow to
analyze the buckling of longitudinal bars in reinforced
concrete columns taking
into account the tie spacing, the diameter and arrangement
of the ties in the cross
section and the longitudinal bar diameter. For this purpose
an analytical method
for the evaluation of the buckling load of longitudinal
bars is described, as a
function of the constraint imposed by the axial or flexural
stiffness of the stirrups.
The longitudinal bar is considered as a column deforming
according to thin beam
theory. The tie action is described either by a set
discrete elastic supports or by a
continuous elastic foundation. The theoretical analysis
considers the column with
one or more deformation modes, with some degree of
nonlinearity, including the
analysis of post-critical equilibrium paths. As a result of
this study, rational
criteria for spacing and sizing of transversal
reinforcement are derived, allowing
to study different alternatives in an abacus of simple use
for design. Several
comparisons with the results obtained experimentally by
other authors in
reinforced concrete columns are presented, allowing for an
evaluation of the
validity of the theoretical developments and the rational
design methodology
proposed herein.
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