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Restrained Underground Piping?Some Practical Aspects of Analysis and Design

by Evans C. Goodling, Jr., Gilbert/Commonwealth Inc, Reading, United States,



Document Type: Proceeding Paper

Part of: Lifeline Earthquake Engineering

Abstract:

This paper is a brief update of stress analysis techniques published earlier [1] to aid the analyst in qualifying continuous welded steel buried pipelines that are subject to seismic soil strain or to pipe thermal expansion. The procedures incorporate current methods of determining modulus of subgrade reaction to transverse pipe movement, calculation of longitudinal sliding friction at the pipe/soil interface, and locating the virtual anchor in a buried piping run. The paper proposes simplified manual analysis methods which give results with a degree of accuracy consistent with the approximate nature of key input data such as seismic soil strain, soil friction and subgrade reaction.

Subject Headings: Buried pipes | Steel pipes | Soil analysis | Soil-pipe interaction | Soil stress | Pipe joints | Thermal analysis

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