Journal ArticleDOI
Effect of Tension on the Combined Loading Failure Envelope of a Pipeline on Soft Clay Seabed
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TLDR
In this article, a numerical finite-element study of the undrained bearing capacity of a pipeline partially embedded in clay soil and subjected to combined vertical (V) and horizontal (H) loading is considered.Abstract:
Offshore pipelines are commonly laid directly on the seabed, which is dominantly soft clayey deposits in deep-water areas. This article presents a numerical finite-element study of the undrained bearing capacity of a pipeline partially embedded in clay soil and subjected to combined vertical (V) and horizontal (H) loading. The effect of tensile capacity between the pipe and soil is considered. Expressions for bearing- capacity envelopes explicitly written in the V-H space and covering a practical range of embedment ratios and uplift tensile capacities are presented. This allows offshore engineers to estimate pipeline behavior under combined loading with consideration of the tension between pipe and soil.read more
Citations
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Journal ArticleDOI
Offshore pipeline performance under strike-slip fault movements
TL;DR: In this article, the authors present the results of a series of large deformation parametric finite element simulations of a partially embedded pipeline resting on a fine-grained seabed and subjected to the differential movement of an active strike-slip tectonic fault.
Journal ArticleDOI
Assessment of submarine pipeline damages subjected to falling object impact considering the effect of seabed
TL;DR: In this article, the authors presented an assessment of submarine pipeline damage subjected to falling object impact considering the effect of seabed through nonlinear explicit dynamic finite element modelling. But, they did not consider the impact of falling objects on the pipeline.
Journal ArticleDOI
Break-out resistance of offshore pipelines buried in inclined clayey seabed
TL;DR: In this article, a total number of 169 200 separate finite element limit analyses (FELA) were conducted on rigid plane-strain pipe sections in inclined clayey seabed, using a sound FELA code OxLim.
Journal ArticleDOI
An interface to numerically model undrained soil-structure interactions
Journal ArticleDOI
Predicting the Instability Trajectory of an Obliquely Loaded Pipeline on a Clayey Seabed
TL;DR: In this article , a plane strain elastoplastic finite element model incorporating the adaptive meshing technique and the contact-pair algorithm is employed and verified with the existing experimental data and the analytical predictions.
References
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Journal ArticleDOI
Combined loading of skirted foundations
TL;DR: In this paper, the response of skirted offshore foundations to combined vertical (V), moment (M) and horizontal (H) loading has been studied using two-dimensional finite-element analysis and upper-bound plasticity analysis assuming the soil to be undrained.
Journal ArticleDOI
Computational model for 3‐D contact problems with friction based on the penalty method
Djordje Perić,David R. Owen +1 more
TL;DR: In this paper, the friction forces are assumed to follow the Coulomb law, with a slip criterion treated in the context of a standard return mapping algorithm Consistent linearization of the field equations is performed which leads to a fully implicit scheme with non-symmetric tangent stiffness which preserves asymptotic quadratic convergence of the Newton-Raphson method.
A generalized Newton method for contact problems with friction
Alain Curnier,Pierre Alart +1 more
TL;DR: Reference LMAF-ARTICLE-1988-001View record in Web of Science Record created on 2005-09-14, modified on 2017-05-10 as mentioned in this paper.
Journal ArticleDOI
The ultimate undrained resistance of partially embedded pipelines
TL;DR: In this article, finite element analyses of shallowly embedded pipelines under vertical and horizontal load are compared with collapse loads calculated using the upper-bound theorem of plasticity, and are used to construct yield envelopes defining the limiting combinations of vertical and lateral load.
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