Tension Bending Behavior of Buried Pipelines Under Large Ground Deformations in Active Faultsby Teoman Ariman, Univ of Tulsa, Tulsa, United States,
Bor-Jen Lee, Univ of Tulsa, Tulsa, United States,
Abstract: This paper deals with the tensile failure of buried pipelines subject to abrupt fault movements. The pipe is modeled as a thin cylindrical shell which is essentially semi-infinite. The Sanders' nonlinear shell theory is used with the inclusion of soil effects, and a simply flow theory of plasticity is introduced via the concept of effective stress from an uniaxial tension test. A constant radius of curvature for the curved section of the pipe is assumed to predict both the tension and bending responses of the pipe to the fault movements. A modified Euler method based on a finite difference scheme is utilized to solve the problem. A number of parametric studies are carried out and discussed to identify some design parameters of buried pipelines.
Subject Headings: Buried pipes | Tension | Geological faults | Pipelines | Pipe failures | Failure analysis | Effective stress | Curvature
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