Limit Loads of Buried Pipelines With Asymmetric Initial Imperfections

[+] Author and Article Information
C. G. Koh, S. T. Quek

Department of Civil Engineering, National University of Singapore, Singapore

J. Pressure Vessel Technol 112(4), 392-396 (Nov 01, 1990) (5 pages) doi:10.1115/1.2929894 History: Received June 30, 1988; Revised July 31, 1989; Online June 17, 2008


The effect of asymmetric imperfection on the limit-load response of pipelines buried in shallow trenches is investigated. The pipeline is modeled as a long beam resting on a rigid foundation and a small strain, large displacement formulation is used. Three different asymmetric imperfection shapes for the beam are considered and the corresponding limit loads are compared with that for a symmetric imperfection. It is found that the shape of initial imperfection plays an important role. The difference between limit loads based on a symmetric imperfection and a nonsymmetric imperfection can be quite significant.

Copyright © 1990 by The American Society of Mechanical Engineers
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