Nonlinear Analysis of Buried Pipelines Crossing Faults

In this paper a nonlinear analysis of buried steel pipelines crossing fault is presented. Steel pipelines have been modeled by Shell and also Beam Elements. These elements are considered to have material and geometrical non-linearities. The surrounding soil is modeled by linear springs in lateral and vertical directions and also by Solid Element. Fault displacement has been considered as target displacement and imposed to the crossing point of pipe-fault as a localized displacement.The method which has been proposed in this article shows a step by step method for Push Over Analysis of buried pipelines crossing faults. By checking the plastic hinges, it would be possible to show whether pipeline need retrofitting or not.The results of this article don’t have any certain complexity and may easily be used in retrofitting of pipelines crossing faults

Keywords:

Buried Pipeline , Fault Displacement , Plastic Hinges , Pattern Load