Abstract
Abstract In-service buckling of submarine pipelines can occur due to the institutionn of axial compressive forces caused by the constrained expansions set up by thermal and internal pressure actions. Vertical buckling is particularly of interest with respect to entrenched submarine pipelines. The analysis presented here concentrates attention upon this mode of behaviour incorporating a consistent deformation-dependent axial resistance force together with a novel interpretation of the pipeline's submerged self-weight inertial characteristics associated with the vertical mode. This enables quantitative definition of both the respective critical state and the immediate post-buckling characteristics to be obtained, in the presence of axial resistance force, for the first time. A more rational interpretation of submarine pipeline vertical buckling behaviour is thereby achieved; this provides additional insight into the mechanism of the ‘pop-up’ phenomenon.
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