Título: | STRUCTURAL BEHAVIOR OF TUBULAR SPATIAL TRUSSES | ||||||||||||||||||||
Autor: |
ALEX VACA DESTE |
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Colaborador(es): |
SEBASTIAO ARTHUR LOPES DE ANDRADE - Orientador PEDRO COLMAR GONCALVES DA SILVA VELLASCO - Orientador |
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Catalogação: | 25/ABR/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=1536&idi=1 [en] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=1536&idi=2 [es] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=1536&idi=4 |
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DOI: | https://doi.org/10.17771/PUCRio.acad.1536 | ||||||||||||||||||||
Resumo: | |||||||||||||||||||||
This work presents an investigation of the structural
behaviour of tubular space trusses composed of continuous
end flattened members stacked above each other and joined
together by a single bolt. One of the main motivations for
this work comes from the fact that this structural solution
is very commonly used in Brazil. The main reasons for that
are the economy achieved in fabrication and the simplicity
of erection associated with that structural solution. This
solution also proves to be competitive when compared to
other commercial systems. On the other hand, the structural
design of these trusses are still subjected to some
criticism since the loss of stiffness in the bars´
extremities is not taken into account.
To enlighten this problem a full-scale experimental
programme was performed in a 12m x 12m space structure. The
adopted structure consisted of a diagonal on square mesh
with top and bottom chord members of 2000mm and 1414mm and
a 1500mm mesh height. The aim of the this programme was to
investigate the ultimate compression resistance of the
structural members taking into account the effect of the
flattened ends and the type of connection used. The
experiments ranged from tests where all the structural
nodes used a single eccentric bolt to others where plated
connectors were used in the supports to eliminate second-
order moments.
The experimental results demonstrated that the
ultimate resistance of the structure with the eccentric
connections only presented a small reduction when compared
to other non-eccentric systems. The tests also confirmed
that the flattened end of the members and the geometric
characteristics of plated connectors are very significant
parameters in the structure´s ultimate behaviour.
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