SEISMIC BEHAVIOUR OF STEEL PIPELINES SUBJECTED TO FAULT RUPTURE

Date

2023-8-23

Author

Şen, Ali Cemil

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Oil and gas buried steel pipelines are vulnerable to permanent ground displacements, such as those resulting from tectonic fault rupture. The dominant failure mechanism is strongly dependent on the type of faulting. The fault crossing pipeline can be significantly compressed, bent and it may fail due to local buckling, upheaval buckling or tensile weld fracture as a result. The most critical of these failure modes will be determined by a set of parameters such as: fault crossing geometry, diameter to thickness ratio (D/t) of the pipeline, pipeline steel grade, burial depth and backfill soil properties. Within the scope of this thesis, firstly the probabilistic permanent fault displacement hazard by using Monte Carlo-based stochastic simulations are assessed for the North Anatolian and East Anatolian Faults of Turkey. The computed hazard is then used to carry out an extensive parametric study to investigate change of failure probability and predominant failure mode of continuous steel pipelines according to criteria set by the Turkish Pipeline Systems and Liquid Storage Tanks Earthquake Regulation.

Subject Keywords

Probabilistic Fault Displacement Hazard Analysis, Monte-Carlo stochastic simulation, Pipeline seismic behavior, North Anatolian Fault

URI

https://hdl.handle.net/11511/105267

Collections

Graduate School of Natural and Applied Sciences, Thesis