Table of Contents
Journal of Earthquakes
Volume 2014, Article ID 818923, 9 pages
http://dx.doi.org/10.1155/2014/818923
Research Article

Seismic Behaviour of Buried Pipelines: 3D Finite Element Approach

Department of Civil Engineering, Indian Institute of Technology Delhi, New Delhi 110016, India

Received 13 April 2014; Revised 27 June 2014; Accepted 7 July 2014; Published 5 August 2014

Academic Editor: Vladimir Sokolov

Copyright © 2014 Smrutirekha Sahoo et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper presents a numerical investigation on six pipeline models to study the seismic response of single and double buried pipelines using finite element method. Different depth and spacing of pipes are considered to investigate their prominent role in the seismic response of buried pipelines under an earthquake loading having PGA of 0.2468 g. In case of single pipeline, the maximum magnitude of final displacement as well as the stress at the end of the seismic sequence is found at the burial depth equal to the pipe diameter. In case of double pipeline, the maximum magnitude of final displacement is found when the spacing between pipes is equal to half the pipe diameter and there is an increasing tendency of developed stress with increase in spacing between pipes. In addition to the above results, the response of the buried pipelines with a particular bend angle (artificially induced bend/buckle) to the permanent ground deformation which is assumed to be the result of seismic wave propagation has also been studied. Remarkable differences in these results are obtained and with these results the designers can reduce seismic risk to their buried pipelines by taking proper precautionary measures.