A NUMERICAL ANALYSIS OF THE CORRELATION BETWEEN THE MECHANICAL BEHAVIOR OF BURIED PIPES AND THE RELATIVE STIFFNESS OF THE SOIL-PIPE SYSTEM
DOI:
https://doi.org/10.26512/ripe.v2i25.20858Keywords:
Buried pipes. Relative stiffness. Finite element methods.Abstract
To avoid the economic and environmental lost caused by failing buried pipes, it is a must to predict the mechanical behaviour of the soil-pipe system. That is because different stiffness between the pipe and its surrounding soil leads to different deformations. The objective of this research is to correlate deformation and failure of buried pipes with the soilpipe relative stiffness. To achieve a reliable level of precision, a finite element methods analysis was carried out assisted by the software Abaqus. Different physical and mechanical parameters of both pipe and soil were tested on the FEM software in order to find the desired correlation. When discretizing the soil, an adaptive mesh was necessary. Thus, regions with differently sized elements were created where discontinuity was found to be high. By computing the results of this study, two points were observed. First, ratios of relative stiffness lesser than 1% have a failure controlled by the pipe since external forces are resisted by this structure. Second, a correlation between deformation/failure and relative stiffness of the system was established. Therefore, this research presents a simple and reliable approach in analyzing the failure mode of buried pipes.
Downloads
References
Allgoog, R. J.; Takahashi, S. K. Balanced design and finite element analysis of culverts. Highway Research Record, HRB, n. 413, p. 45-56, 1972.
Bowles, J. E., Foundation analysis and design. 5. Ed: McGraw-Hill, 1996. New York, USA.
Gumbel, J. E.; O’Reilly, M. P.; Lake, L. M.; Carder, D. R. The development of a new design method for buried flexible pipes. Proceedings of the Europipe’82, p. 87-98, 1982.
Hikooei, B. F., 2013. Numerical modeling of pipe-soil interaction under transverse direction. Master’s thesis, University of Calgary, Calgary ”“ Alberta, Canada.
Hobbit, Karlsson & Sorensen, 2003a. Abaqus 6.8 ”“ Theory Manual, Inc. Pawtucket, USA.
Hobbit, Karlsson & Sorensen, 2003b. Abaqus 6.8 ”“ User’s Manuals I, II e III, Inc. Pawtucket, USA.
Jeyapalan, J. K.; Hamida, H. B. Comparison of German to Martson design methods. Journal of Transportation Engineering, v. 114, n. 4, p. 420-434, 1988.
Rubio, N. P., 2008. Estudo de dutos enterrados considerando a interação solo-estrutura. PhD thesis, PUC-Rio, Rio de Janeiro ”“ RJ, Brazil.
Strömblad, N., 2014. Modeling of soil and structure interaction subsea. Master’s thesis in applied mechanics, Chalmers University of Technology, Göteborg, Sweden.
Watkins, R. K.; Anderson, L. R. Structural mechanics of buried pipes. 1. Ed. [S.1.]: GRG Press, 1999.
Downloads
Published
How to Cite
Issue
Section
License
Given the public access policy of the journal, the use of the published texts is free, with the obligation of recognizing the original authorship and the first publication in this journal. The authors of the published contributions are entirely and exclusively responsible for their contents.
1. The authors authorize the publication of the article in this journal.
2. The authors guarantee that the contribution is original, and take full responsibility for its content in case of impugnation by third parties.
3. The authors guarantee that the contribution is not under evaluation in another journal.
4. The authors keep the copyright and convey to the journal the right of first publication, the work being licensed under a Creative Commons Attribution License-BY.
5. The authors are allowed and stimulated to publicize and distribute their work on-line after the publication in the journal.
6. The authors of the approved works authorize the journal to distribute their content, after publication, for reproduction in content indexes, virtual libraries and similars.
7. The editors reserve the right to make adjustments to the text and to adequate the article to the editorial rules of the journal.