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Analysis of Gas Pipeline Movement and Stress Estimation  

Kim, Joon Ho (한국가스공사 연구개발원)
Kim, Dong Hyawn (군산대학교 해양시스템공학과)
Lee, Sang Geun (군산대학교)
Hong, Seong Kyeong (한국가스공사 연구개발원)
Jeong, Sek Young (한국가스공사 연구개발원)
Publication Information
Journal of Korean Society of Steel Construction / v.21, no.3, 2009 , pp. 203-210 More about this Journal
Abstract
If there are some construction works that affect the stability of buried pipelines, the pipelines should be moved to guarantee their safety. In this paper, modeling methods for analyzing the movement of pipelines were sought, and the step-by-step stress estimation method of moving pipelines was developed. Some factors affecting of pipeline response such as the element type, the element size, boundary modeling, and geometric non-linearity were quantitatively investigated. In addition, some conditions in which accuracy and effectiveness can be compromised in the analysis of long pipelines were identified. A neural network was used to estimate the pipeline stress. The inputs to the neural network included step-by-step displacements, and the output was the resulting stress at each movement step. After training the neural network, it can be used to estimate pipeline stresses at some sub-steps that are not included in the training. A Windows-based stress estimation program was developed.
Keywords
Pipeline; movement, modeling; geometric nonlinearity; stress estimation; artificial neural network;
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