Rehabilitation of pipelines in seismic regions
- AVIBRA Temed Ltd., Arava (Israel)
The susceptibility of oil and gas pipelines to seismic damage has been demonstrated in earthquakes everywhere around the world. Earthquake design specifications today are more restrictive than before. That is why pipelines built more than ten years ago are of major concern to managers and engineers. Basic approaches to the aseismic design of new pipelines and retrofitting of buried pipes and above-ground transmission pipelines and piping systems located in high risk seismic regions represent the main topic of the paper. A realistic assessment of earthquake damage potentials is needed to develop construction and retrofitting procedures. Supporting this type of constructing and rehabilitation activity for pipelines requires a better definition of key input parameters like area seismicity, the identification and characterization of ground moving hazards. The nonlinear approach for predicting spatial bending, torsion, and upheaval buckling of curved pipeline is applied for stress and stability analysis of buried pipelines under operational and seismic loading. The example of calculations useful for retrofit design of pipelines is given. An experience of damping devices application to mitigate seismic movement of above-ground pipelines has demonstrated an excellent ability to prevent damage during earthquake and operational dynamic loading. These devices are useful for above-ground pipeline retrofitting. To reduce uncertainty regarding the ability of a pipe to continue to hold pressure after seismic damages and retrofitting measures, it is important to develop the test programs, which should include investigations of buried and above-ground pipeline samples.
- OSTI ID:
- 434139
- Report Number(s):
- CONF-9606127-; ISBN 0-7918-1767-9; TRN: IM9709%%573
- 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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