Numerical study on the buckling of pressurized pipe under eccentric axial compression

摘要

Pipeline transport is one of the main solutions for oil and gas transmission and distribution. The pipeline in service may be subjected to complicated loads (internal pressure, tension or compression, bending and their combination) when crossing complex geohazard regions. In this study, the compressive strain capacity of pressurized pipelines under eccentric axial compression is investigated numerically. Meanwhile, the effects of the internal pressure, pipe diameter-to-wall-thickness ratio (D/t) and the material strain hardening capacity on the compressive strain capacity are studied. It has been found out that under eccentric axial compression, the buckling behavior of pipes depends on the internal pressure, D/t and material strain hardening capacity. The compressive strain capacity increases with the increase of the internal pressure and the strain hardening capacity; while the diameter-to-wall-thickness ratio displays a negative effect.