Global lateral buckling analysis of idealized subsea pipelines

Localised lateral buckling of partially embedded subsea pipelines with nonlinear soil resistance

“…Present industry practice estimates the soil resistance with the Coulomb friction model, which expresses the lateral soil resistance as the product of effective submerged weight of the pipeline and a friction coefficient lying in the range of 0.2-0.8 (Lambrakos, 1985;Lyons, 1973;Wagner et al, 1989). This means that the lateral soil resistance is regarded as constant, which has been employed to study the analytical solutions of lateral buckling for subsea pipelines by many researchers Hobbs, 1984;Hong et al, 2015a;Hong et al, 2015b;Li et al, 2016;Liu et al, 2014;Taylor and Gan, 1986b). Consistent deformation-dependent resistance force models were incorporated into the analyses of lateral buckling by Taylor and Gan (Taylor and Gan, 1986a) and Zhu et al (Zhu et al, 2015).…”

“…Wang and Shi (Shi et al, 2013;Wang et al, 2011) have investigated the upheaval buckling for ideal straight pipelines and for pipelines with prop imperfection on a plastic soft seabed. Moreover, analytical solutions were proposed and compared with finite-element solutions for high-order buckling modes of ideal pipelines and subsea pipelines with a single-arch initial imperfection (Hong et al, 2015b;Liu et al, 2014), which were all based on the classical lateral buckling modes proposed by Hobbs. Karampour and co-workers investigated the interaction between upheaval or lateral buckling and propagation buckling of subsea pipelines Karampour and Albermani, 2014;.…”

Static and dynamic analysis on upheaval buckling of unburied subsea pipelines

“…Therefore, the beam element is suitable for simulation of pipeline structures. The seabed is assumed to be a rigid surface, which is a common assumption in the traditional analytical method (Liu et al, 2014b). Thus rigid surface element is selected to simulate the seabed.…”

Analytical study of lateral thermal buckling for subsea pipelines with sleeper

“…Consequently, the integrity of pipelines within the buckle is improved. Lateral and upheaval buckling have been studied by previous researchers in the theoretical framework by modelling the pipeline as a beam resting on a rigid seabed [10][11][12][13][14][15][16][17] or on a soft seabed [18][19][20]. Nonlinear localised lateral buckling of straight pipelines was investigated analytically by Zhu et al [21] and Wang [22] without the assumption of lateral deformation.…”