Stochastic Mechanical Response and Failure Mode Transition of Corroded Buried Pipelines Subjected to Reverse Faulting
Tianchong Li, Kaihua Yu, Yachao Hu, Ruobing Wu, Yuchao Yang, Feng Liu
TL;DR
This study explores how corrosion and pressure affect the failure of buried pipelines during geological faults, revealing new insights into failure modes and reliability.
Contribution
A probabilistic framework integrating random field theory and a generative model to assess corroded pipelines under faulting is introduced.
Findings
Internal pressure induces geometric stiffening, shifting failure modes from tensile rupture to ductile buckling.
Spatial dispersion of pitting, not just average wall thinning, governs premature pipeline failure.
High internal pressure increases tensile strain localization at corrosion pits, raising rupture risk under minor faults.
Abstract
Buried oil and gas pipelines, the critical arteries of global energy infrastructure, are increasingly vulnerable to severe geological hazards such as reverse faulting, yet their structural integrity is often pre-compromised by stochastic corrosion damage accumulated during service. However, quantifying the coupled impact of spatial corrosion heterogeneity and large ground deformation remains a formidable challenge due to the complex nonlinearities involved in soil–structure interactions and wall thinning. This study establishes a probabilistic assessment framework integrating random field theory, nonlinear finite element analysis, and a generative conditional diffusion model to characterize realistic 2D non-Gaussian corrosion morphologies. The numerical results reveal a significant geometric stiffening effect induced by internal pressure, where moderate operating levels effectively…
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Taxonomy
TopicsGeotechnical Engineering and Underground Structures · Structural Integrity and Reliability Analysis · Drilling and Well Engineering