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Summary: 1
Abstract
Buried pipelines essentially involve problems of soil-structure interaction that
include several complex factors such as geometry, material properties, and boundary
conditions. Complete, comprehensive and lengthy numerical analyses using the
finite element methods were carried out in this research to calculate stresses and
strains of buried pipes. Using the obtained results, regression equations were
developed to predict the absolute maximum stress and diameter change of buried
pipes. Personal computer software, using Visual Basic 6.0, was developed utilizing
the results stated above. The results of the regression analysis were used to develop
three modules, which contain subroutines or functions to perform tasks as follows:
Design and Analysis of Straight Pipe, Design and Analysis of Horizontal or Vertical
Bend, and Buckling Check.
Keywords: buried pipelines, regression, horizontal bend, vertical bend,
homoscedasticity, normality.
1 Introduction
Analysis and design of buried pipelines are usually based on classical theories and
semi-empirical methods. The confidence in these approaches is very limited and use
of them could lead to a very conservative design, which could cause major increases
in costs. One of such methods is the American Petroleum Institute (API) [1]
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