Título: | GLOBAL TORNADIC MECHANICAL ACTIONS ON EETL TOWERS | |||||||
Autor: |
THIAGO GALINDO PECIN |
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Colaborador(es): |
JOAO LUIS PASCAL ROEHL - Orientador |
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Catalogação: | 07/OUT/2009 | 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=14341&idi=1 [en] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=14341&idi=2 |
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DOI: | https://doi.org/10.17771/PUCRio.acad.14341 | |||||||
Resumo: | ||||||||
Tornadoes are small-scale atmospheric phenomena that have large power of
destruction along their path. Tornado occurrence has been reported with
increasing frequency in Brazilian territory. From the point of view of engineering,
special attention should be destined to sensible structures, such as nuclear power
plants and towers for transmission of electric energy. In spite of observed
collapses of these systems due to the action of tornadoes in national territory,
Brazilian researches on this subject are incipient. In this context, the mechanical
effects of tornado incidence on transmission towers are studied and compared
with values prescribed by the usual standards for wind design. The wind field
model proposed by Wen (1975) based on the work of Kuo (1971) and simulations
of representative transmission towers of South and Southeast Brazilian river
basins, favorable to such events, are used. From these studies, a methodology for
evaluation of the tornadic global effects in the design of transmission towers is
proposed and exemplified. The method is carried out through the variation of
several parameters involved in the problem, seeking to critical situations. Finally,
a broader tornadic demand analysis is made and a methodology for evaluation of
transmission tower annual probability of failure due to tornado events is suggested
and illustrated.
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