An unified formula for the critical force of lateral buckling of imperfect submarine pipelines

Xin-hu, Zhang; Soares, C. Guedes; An, Chen; Duan, Menglan

doi:10.1016/j.oceaneng.2018.08.024

Cited by 30 publications

(12 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…is retained in de Oliveira Cardoso et al (2015), whereas a value of 1.17 × 10 −5 / o C is used by and Zhang et al (2018b). The estimation of ∆T implies therefore the need to calculate the ultimate value of the axial force P 0 .…”

Section: Indirect Solutionsmentioning

confidence: 99%

“…found that the critical forces of pipelines could vary depending on this curvature parameter when the amplitude-to-wavelength ratio is incidentally constant. Furthermore, the influence of ρ max /L 0 was analyzed by Karampour et al (2013a), Zhang and Duan (2015) and Zhang et al (2018b). Eight different imperfections with various maximum curvature radii were adopted for comparison purposes, as illustrated in Figure 7.…”

Section: Imperfection Featuresmentioning

confidence: 99%

“…However, these methods are far too expensive to be deployed in reality, especially with extra deep depth and complex sea environment. In order to figure out this drawback, the planned lateral buckling has been proposed and is still widely used nowadays, as it produces more benign buckles than uncontrolled methods (Liu et al, 2014;Zhang et al, 2018b;Chee et al, 2018;Zhang et al, 2019). Specific engineering measures, such as the use of snake-lays, sleepers, local weight reductions, or the distributed buoyancy technique, are employed to promote a reliable formation of lateral buckles at planned locations (Harrison et al, 2003;Peek and Yun, 2007;Urthaler et al, 2012;Shi and Wang, 2014).…”

mentioning

confidence: 99%

See 2 more Smart Citations

Lateral buckling of submarine pipelines under high temperature and high pressure—A literature review

Cai

Grognec

2022

Ocean Engineering

View full text Add to dashboard Cite

Section: Indirect Solutionsmentioning

confidence: 99%

Section: Imperfection Featuresmentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Lateral buckling of submarine pipelines under high temperature and high pressure—A literature review

Cai

Grognec

2022

Ocean Engineering

View full text Add to dashboard Cite

“…The effect of seabed undulation and initial stress of the pipeline on the critical axial compressive force of upheaval buckling was investigated by Xu and Lin [35] by using numerical tools developed with the Vector Form Intrinsic Finite-Element (VFIFE) method. Zhang et al [36,37] studied upheaval and lateral buckling behaviour of submarine pipelines with different initial imperfection shapes. A characteristic parameter of the initial imperfection shape was defined in their analysis, which had a great influence on the critical axial compressive force.…”

Section: Introductionmentioning

confidence: 99%

Snap behaviour in the upheaval buckling of subsea pipelines under topographic step imperfection

Wang

Heijden

2020

Marine Structures

View full text Add to dashboard Cite

Pipelines exposed to high-temperature and high-pressure (HTHP) with a topographic step imperfection are susceptible to the phenomenon of upheaval buckling potentially leading to a hazard for the structural integrity of the pipeline. To analyse this problem we derive analytical upheaval buckling solutions and obtain the locations of maximum displacement and maximum axial compressive stress. We also analyse the typical post-buckling behaviour and its dependence on step height, axial soil resistance and wall thickness. The difference in behaviour between a pipeline with step imperfection and one with a symmetric prop imperfection is discussed. Our results show that a pipeline with a step imperfection is more prone to upheaval buckling than a perfect pipeline. For sufficiently small step heights the pipeline may suffer a snap-back instability under decreasing thermal loading, raising the possibility of hysteretic snap behaviour under cyclic thermal loading (for instance caused by periodic start-ups and shutdowns). The snap-back buckling disappears for large enough step height and the minimum critical temperature difference decreases with increasing step height and wall thickness or with decreasing axial soil resistance. The maximum compressive stress decreases with increasing step height and axial soil resistance or with decreasing wall thickness. A pipeline with step imperfection is safer than one with a symmetric prop imperfection.

show abstract

“…So far, there have been a large number of papers dealing with the lateral buckling of pipelines, aiming at predicting critical loads and buckling modes with analytical or numerical models (see [23,2,32], among others). The use of numerical software is clearly interesting as it allows one to include many physical phenomena, without too many simplifications, and to deal with the post-buckling response of pipes, taking into account both geometric and material non-linearities.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Torsional Effects on the Lateral Buckling of a Pipe-Like Beam Resting on the Ground under Axial Compression

Grognec

Nême

Cai

2020

Int. J. Str. Stab. Dyn.

View full text Add to dashboard Cite

This paper deals with the lateral buckling behavior of an axially compressed beam interacting with the ground on which it is resting. Such a simple model is supposed to reproduce the same trends as observed during the lateral buckling of offshore pipelines on the seabed. In such practical analyses, the pipe-soil interaction relates the ground to the neutral axis of the pipeline. It is shown that, although such a constraint significantly affects the buckling behavior of the pipeline, it cannot reflect the torsional component of the buckling modes. However, this component is encountered in practice and may further modify the critical loads. Therefore, in this present preliminary study, the interaction between the beam in hand and the surrounding ground is modeled by a connection (a continuous distribution of lateral springs) related to the bottom line of the beam. In this way, the real contact between the soil and the bottom line of a pipe is mimicked, allowing for both flexural and torsional deformations in the buckling response. The problem is investigated analytically using an Euler–Bernoulli beam model with an isotropic linear elastic constitutive law and also an elastic interaction law. Original analytical solutions are derived and compared to numerical results obtained through finite element computations. In comparison with classical solutions (with the connection related to the neutral axis), new types of buckling modes may appear when considering torsional effects, depending on the boundary conditions, with generally much lower critical loads. These first results are certainly representative of some features of the global/localized lateral buckling of offshore pipelines, indicating that torsional effects should also be taken into account in such more comprehensive analyses.

show abstract

An unified formula for the critical force of lateral buckling of imperfect submarine pipelines

Cited by 30 publications

References 31 publications

Lateral buckling of submarine pipelines under high temperature and high pressure—A literature review

Lateral buckling of submarine pipelines under high temperature and high pressure—A literature review

Snap behaviour in the upheaval buckling of subsea pipelines under topographic step imperfection

Investigation of the Torsional Effects on the Lateral Buckling of a Pipe-Like Beam Resting on the Ground under Axial Compression

Contact Info

Product

Resources

About