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Publications
Zhang, X. and Guedes Soares, C. (2019), “Lateral buckling analysis of subsea pipelines on nonlinear foundation”, Ocean Engineering, Vol. 186, pp. 106085 (11 pages)
Lateral soil resistance plays a significant role in lateral buckling, which is a main consideration in the design of subsea pipelines. In this study, a new lateral soil resistance model is proposed to describe the lateral resistance force-displacement relation. It shows a good agreement with existing test results. The differential equation of an imperfect subsea pipeline is derived based on the new model. It has different forms with existing equations. To solve the differential equation, an approximate solution is proposed on the basis of perturbation expansion. The effects of soil properties, lateral resistance, and initial imperfection parameters on lateral buckling displacement, mode, wavelength, and critical buckling force are discussed. Results show that the present model and methodology are available and effective to obtain the lateral buckling response of a subsea pipeline embedded in nonlinear foundation. It may be a good way to improve the capacity of a subsea pipeline against lateral buckling by deliberately making initial imperfection and controlling the curvature of the initial imperfection paramters.
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