Determining the appropriate dimensional and behavioral model for numerical modeling of the buried pipelines crossing strike-slip faults

Document Type : Research Article

Authors

1 Islamic Azad University, Tehran North Branch

2 Assistant professor of Civil Eng., Islamic Azad University, Tehran North Branch

Abstract

In recent decades, due to the increasing use of pipelines to transport a variety of fluids, the need to analyze and evaluate these lines at the crossing faults has increased. In this regard, many numerical studies have been carried out on buried pipes crossing faults. In most models used in previous researches, the selected characteristics for creating models were based on researchers' experiences. Therefore, naturally, the numerical results obtained from the FE analysis can be non-economic or erroneous. On the other hand, common regulations and standards for designing pipelines require special conditions and criteria in this field. Therefore, in this study, based on the existing bylaws in this field, the effect of selective pipe length and soil behavioral model on the accuracy of ABAQUS model results has been investigated. In this regard, first, the results of six models of buried steel pipeline with two different lengths and other similar conditions and then under other same and purely different conditions in terms of soil behavior model, the response of the buried pipeline crossing strike-slip fault was the basis of comparison. Finally, the review of the results shows that the unanchored length of the pipe is better for simulating the longitudinal dimension of the pipeline. Also, the behavioral model of CAP plasticity was selected as a suitable model to simulate soil behavior due to the approximation of the results with the relations of the regulations.

Keywords

References

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Amirkabir Journal of Civil Engineering
Volume 54, Issue 4
July 2022
Pages 1461-1482

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