A reliability-based calibration study for upheaval buckling of pipelines
- Det Norske Veritas Industry AS, Hoevik (Norway)
When a pipeline is subjected to axial compressive loads it will try to extend and release the compression force. If the pipeline is restrained by a soil or rock cover forces will be established between the pipeline and the soil. Upheaval buckling will occur when the force exerted by the pipe on the soil exceeds the vertical restraint. The pipeline moves upwards leading to possible unacceptable local plastic deformations or collapse or making it vulnerable to fishing gear and other third party activities. The present paper describes a reliability-based design procedure against upheaval buckling of rock or soil covered pipelines. The study is performed using state-of-the-art design methodologies including an assessment of all known uncertainties related to the load and capacity, measurement, surveys and confidence in the applied models. A response surface technique is applied within the level 3 reliability analysis. Target safety levels are discussed and a case specific calibration of partial safety factors in a consistent design equation against upheaval buckling is performed. Finally, a set of safety factors are proposed for both SLS and ULS requirements.
- OSTI ID:
- 194318
- Report Number(s):
- CONF-950695-; ISBN 0-7918-1308-8; TRN: IM9611%%159
- Resource Relation:
- Conference: International conference on offshore mechanics and arctic engineering, Copenhagen (Denmark), 18-22 Jun 1995; Other Information: PBD: 1995; Related Information: Is Part Of OMAE 1995 -- Proceedings of the 14. international conference on offshore mechanics and arctic engineering. Volume 2: Safety and reliability; Guedes Soares, C. [ed.] [Technical Univ. of Lisbon, Lisboa (Portugal)]; PB: 567 p.
- Country of Publication:
- United States
- Language:
- English
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