Elasto-pIastic design and assessment of pipelines: 3D finite element modeling
conference paper
A common finite element modeling approach for buried pipelines is the combined use of beam and spring elements. Typical loads are soil settlements, temperature variations, internal pressures, neutral topsoil loads and traffic loads. The beam elements represent the pipeline; assemblies of spring elements represent the surrounding soil comprising an elasto-plastic bedding and friction. The choice for such finite element models is a pragmatic one. The models are relatively easy to construct and the analyses can be performed within reasonable calculation time on an average PC. From a mechanical point of view the problem of a buried pipeline subjected to subsidence, or an offshore pipeline subjected to sand waves, is of a full 3D nature. Beam elements and spring elements only partly incorporate full 3D effects. In practice the common finite element models are therefore enhanced to take into account 3D effects that would be missed otherwise. A major point is the distinction between beam action and cross sectional behavior of pipes in straight and curved sections and their mutual interaction.
Topics
TNO Identifier
436428
ISBN
0784407452
Source title
ASCE Pipeline Division Specialty Congress - Pipeline Engineering and Construction - What's on the Horizon, PIPELINES 2004, 1 August 2004 through 4 August 2004, CY - San Diego, CA
Editor(s)
Galleher J.J.
Stift M.T.
Stift M.T.
Pages
923-932
Files
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