Seismic Response Analysis of the Buried Pipeline With Double Corrosion Defects in Permafrost Regions Under Oblique Incidence of Shear Vertical Waves Available to Purchase

This paper focuses on the X80 pipeline with double corrosion defects, and the pipe–soil interaction model is established in abaqus to investigate the seismic response of the buried pipeline in permafrost regions under the shear vertical (SV) waves. The stress response of the pipeline is analyzed under varying corrosion defect spacings and internal pressures, and the effects of different incident angles on stress, acceleration, and displacement responses are examined. The results show that under the action of obliquely incident SV waves, when the axial spacing between two corrosion defects exceeds four times the pipe wall thickness, their interaction becomes negligible. In nonoperating and operating states, the stress response of the pipeline increases with the increase of the incident angle, and when incidence inclination is 30 deg and incidence azimuth is 90 deg, SV wave is the most harmful to the pipeline. Additionally, the stress response of pressurized pipelines is significantly higher than that of unpressurized pipelines, although the latter is more sensitive to changes in the incident angle. On the other hand, the incident azimuth angle has less effect on the vertical acceleration and displacement of the pipeline, but more effect on the lateral and axial acceleration and displacement. And the incident inclination angle has a pronounced effect on acceleration and displacement in all three directions, with larger angles resulting in more pronounced effects.