Mechanical Response and Deformation Behavior of Carbon Fiber Reinforced Buried Steel Pipeline Under Reverse Fault

Abstract In order to investigate the effect of Carbon Fiber Reinforced Plastics (CFRP) on the mechanical response and deformation behavior of buried pipeline under reverse fault, numerical simulation model of carbon fiber reinforced buried steel pipeline under three-dimensional reverse fault is established. The effects of different factors, such as CFRP wrapping thickness, CFRP wrapping length and CFRP wrapping angle on the mechanical response of the pipelines were studied. The results show that with the increase of fault displacement, the structural instability of the pipeline without CFRP wrapping first occurs in the hanging. The ability of the pipeline to resist fault displacement can be greatly improved by wrapping just 10mm thick CFRP. The wrap length has a great influence on the buckling position of the pipeline. The smaller wrap angle is more conducive to increasing the ability of the pipeline to resist fault displacement. For the actual pipeline through the reverse fault, CFRP should be conducted near the fault plane to prevent buckling, the wrap thickness is recommended to be 20mm, the wrap length is recommended to be greater than 30m at both ends of the fault plane, and the wrap angle is recommended to be 15 °.