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.v2i25.20858Palavras-chave:
Buried pipes. Relative stiffness. Finite element methods.Resumo
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
Referências
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
Publicado
Como Citar
Edição
Seção
Licença
Autores que publicam nesta revista concordam com os seguintes termos:
Autores mantém os direitos autorais e concedem à revista o direito de primeira publicação, sendo o trabalho simultaneamente licenciado sob a Creative Commons Attribution License o que permite o compartilhamento do trabalho com reconhecimento da autoria do trabalho e publicação inicial nesta revista.
Autores têm autorização para assumir contratos adicionais separadamente, para distribuição não-exclusiva da versão do trabalho publicada nesta revista (ex: publicar em repositório institucional ou como capítulo de livro), com reconhecimento de autoria e publicação inicial nesta revista.
Autores têm permissão e são estimulados a publicar e distribuir seu trabalho online (ex: em repositórios institucionais ou na sua página pessoal) a qualquer ponto antes ou durante o processo editorial, já que isso pode gerar alterações produtivas, bem como aumentar o impacto e a citação do trabalho publicado.