Dynamics of Buried Pipelines

by P. M. O'Leary, Univ Coll, Dep of Mathematical, Physics, Galway, Ireland,
S. K. Datta, Univ Coll, Dep of Mathematical, Physics, Galway, Ireland,

Abstract: Forced motion of pipelines due to stationary or moving loads is studied. The pipe is modeled as an elastic shell in an elastic (or viscoelastic) medium. The interaction of the shell and the surrounding medium is modeled by a stiffness matrix, which represents perfect bonding between the shell and the medium. The peak stresses in the pipe due to axial and vertical stationary (or moving) loads are studied. It is shown that the stresses depend heavily on the choice of materials. For axial load, the axial stress is always greater than the hoop stress. For a vertical load, when the ratio of the shear moduli of the medium and shell is large the axial stress is greater than the hoop stress, but for smaller ratios the hoop stress is dominant.

Subject Headings: Axial forces | Vertical loads | Axial loads | Buried pipes | Stress analysis | Moving loads | Soil-pipe interaction | Pipelines

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