IIIT Hyderabad Publications
ANALYSIS OF CONTINUOUS AND SEGMENTED PIPELINE IN LIQUEFIABLE SOIL
Authors: Durga Prasad Reddy,Neelima Satyam
Conference: 5th International Conference on Integrity - Reliability - Failure
Report no: IIIT/TR/2016/9
Pipelines are the important mode of transportation for liquid and gas over competing modes for several reasons as they are less damaging to the environment, less susceptible to theft, and more economical, safe, convenient, and reliable than other modes. Pipelines are generally buried below ground for aesthetic, safety, economic and environmental reasons. They require proper designing and safety checks in order to perform well in earthquake shaking as their failure can lead to major hazards. This paper investigates a number of buried pipelines and their interaction with soil under seismic environment. As a part of this, a number of continuous and segmented pipelines of different diameter, length, and thickness have been taken into consideration. The density, internal pressure of pipe, and density of surrounding soil are taken into account. In continuous pipelines, the safety of the pipeline is checked against the force due to bouncy whereas, in segmented pipelines, it is checked against permanent ground deformation (PGD) due to liquefaction. Results are shown based on the study. Strain and displacement curves for the different pipe parameters including pipe diameter and its thickness are plotted so that one can observe its behaviour and can identify the critical point for safety. Based on the results obtained some consideration are given for the design of pipeline in the Liquefied zone, which improve the capability of the pipeline to withstand buoyancy force due to soil liquefaction. The safety of buried pipelines is analysed as per IITK-GSDMA (IIT-Kanpur-Gujarat state Disaster Management Authority) guidelines on seismic design. MATLAB code had been developed and further buried pipeline risk assessment tool GUI (Graphical User Interface) has also been prepared so that user can enter pipe parameters and soil properties and can find the safety of the pipelines Keywords: continuous pipelines, segmented pipelines, liquefaction, PGD.
Full paper: pdf
Centre for Earthquake Engineering
Copyright © 2009 - IIIT Hyderabad. All Rights Reserved.