Technique of estimation of actual strength of a gas pipeline section at its deformation in landslide action zone
- RAS Gasprom, Moscow (Russian Federation). VNIIGAS Scientific-Technical Center
The technique is given which permits determination of stress and strain state (SSS) and estimation of actual strength of a section of a buried main gas pipeline (GP) in the case of its deformation in a landslide action zone. The technique is based on the use of three-dimensional coordinates of axial points of the deformed GP section. These coordinates are received by a full-scale survey. The deformed axis of the surveyed GP section is described by the polynomial. The unknown coefficients of the polynomial can be determined from the boundary conditions at points of connection with contiguous undeformed sections as well as by use of minimization methods in mathematical processing of full-scale survey results. The resulting form of GP section`s axis allows one to determine curvatures and, accordingly, bending moments along all the length of the considered section. The influence of soil resistance to longitudinal displacements of a pipeline is used to determine longitudinal forces. Resulting values of bending moments and axial forces as well as the known value of internal pressure are used to analyze all necessary components of an actual SSS of pipeline section and to estimate its strength by elastic analysis.
- OSTI ID:
- 434142
- Report Number(s):
- CONF-9606127-; ISBN 0-7918-1767-9; TRN: IM9709%%576
- Resource Relation:
- Conference: International pipeline conference: pipelining in a changing competitive environment, Calgary (Canada), 9-14 Jun 1996; Other Information: PBD: 1996; Related Information: Is Part Of Proceedings of the first international pipeline conference (IPC `96). Volume 2; Yoon, M. [ed.] [Valmet Automation, Calgary, Alberta (Canada)]; Mensik, M. [ed.] [NOVA Gas Transmission, Calgary, Alberta (Canada)]; Mohitpour, M. [ed.] [NOVA Gas International, Ltd., Calgary, Alberta (Canada)]; PB: 772 p.
- Country of Publication:
- United States
- Language:
- English
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