Título: | DYNAMIC BEHAVIOR OF BURIED PIPES: METHODOLOGY AND COMPUTATIONAL IMPLEMENTATION | |||||||
Autor: |
IGOR EDUARDO OTINIANO MEJIA |
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Colaborador(es): |
DEANE DE MESQUITA ROEHL - Orientador CELSO ROMANEL - Coorientador |
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Catalogação: | 31/MAR/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=13214&idi=1 [en] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=13214&idi=2 |
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DOI: | https://doi.org/10.17771/PUCRio.acad.13214 | |||||||
Resumo: | ||||||||
This work presents a numerical methodology for the analysis
of buried pipes employed by the transport of oil and gas
subject to dynamic loads. Emphasis is given to seismic
loads. A finite element model based on a special class of
beam element for the pipe representation is employed. Both
geometric and material nonlinearities are considered in a
total Lagrangean formulation. The equilibrium
equations are formulated based on the virtual work
principle considering the stress and deformation components
of the beam-pipe element. The Reduced Modulus
Direct Integration (RMDI) technique is employed by which
the elasto-plastic material behavior is incorporated. This
technique excludes from the analysis the
local buckling effects of the pipe walls. The corresponding
finite element matrices for this element are obtained. In
this methodology the effects of the constant
internal pressure as well as the soil-pipe interaction are
included. The soil is modeled through two-dimensional
elements with material behavior described
through a linear equivalent model. Interface elements
couple beam-pipe elements with soil elements and account
for soil-pipe interaction. Finally silent boundary
elements are incorporated to the model to reproduce the
semi-infinite boundary conditions in the finite size model.
Distributed loads are considered constant with
respect to the global axis. Acceleration histories are
applied to simulate seismic dynamic loads among which the
acceleration histories of the earthquake which
occurred in Pisco-Perú in 2007. A finite element computer
code is developed according to the methodology presented.
Some examples are studied with the objective to evaluate
numerically the analysis results and to formulate some
conclusions to the behavior of buried pipes subject to
seismic loads.
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