Estimates of maximum strains induced in buried pipelines by dynamic loading
- Univ. of Illinois, Urbana, IL (United States). Newmark Lab.
- Army Construction Engineering Research Labs., Champaign, IL (United States)
An evaluation of pipe strains measured during full scale blast in-situ tests was carried out to assess the effects produced by a nearby quarry blast in a buried, steel pipeline carrying pressurized gas. The result of the blast tests indicated that the magnitude of the maximum circumferential strain is equal or larger than the magnitude of the maximum axial strain measured in the pipe. It was also observed that circumferential strains can develop simultaneously with the dynamic-induced axial strains, resulting in a more critical loading condition than the one contemplated by the ASCE (1983) design guidelines for seismic loading. This behavior can become critical in pressurized pipes where significant circumferential stresses are already present under normal operating conditions. Based on the results of these tests, recommendations for including circumferential strains are suggested to the ASCE (1983) Design Guidelines. Consideration should be given to a compressive wave traveling at a high angle which respect to the longitudinal axis of the pipe which can induce squeezing or ovaling of the pipe section, resulting in significant circumferential strains in the pipe.
- OSTI ID:
- 403435
- Report Number(s):
- CONF-9508226-; ISBN 0-7844-0101-2; TRN: IM9651%%470
- Resource Relation:
- Conference: 4. U.S. conference on lifeline earthquake engineering, San Francisco, CA (United States), 10-12 Aug 1995; Other Information: PBD: 1995; Related Information: Is Part Of Lifeline earthquake engineering: Proceedings of the fourth U.S. conference; O`Rourke, M.J. [ed.]; PB: 823 p.; Technical Council on Lifeline Earthquake Engineering, Monograph number 6
- Country of Publication:
- United States
- Language:
- English
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