Technological pipeline Structural design against PROGRESSIVE COLLAPSE through dynamic direct analysis
https://doi.org/10.26518/2071-7296-2025-22-5-804-821
EDN: FKZDHT
Abstract
Introduction. this article discusses the procedure of calculation for the progressive collapse of a pipeline overpass in direct dynamics with the use of various methods for setting the initiating impact time. The peculiarity of designing pipeline overpasses in terms of their resistance to progressive collapse is related to the fact that due to the pipelines location it is often not possible to install the bracings within the overpass support frame.
Materials and methods. The calculation was performed on the basis of the SCAD Office software package with the finite element method to determine the stress-strain state of the calculation model. A study was conducted on the asymptotic convergence of the calculation model in three iterations, with a subsequent increase in the number of finite elements. The convergence was assessed based on an analysis of the difference in forces in the elements obtained during the calculation of each iteration. When calculating in a direct dynamic formulation, three methods for estimating the initiating impact time were used.
Results. The asymptotic convergence of the calculation model was analyzed, and based on the analysis results, a model was selected in which the stresses in the elements of subsequent models differ by no more than 3%. The results of dynamic calculations were compared based on three options for setting the initiating impact time.
Discussion and conclusion. Based on the research, the need was proved to study the calculation models for asymptotic convergence to evaluate and verify the results obtained. Conclusions have been made based on the use of three methods for setting the initiating impact time. The dependences between stresses, displacements and the initiating impact time have been determined.
About the Authors
A. F. Istomin
Ural Federal University
Russian Federation
Russian Federation
Istomin Anton F., postgraduate student
620062, Yekaterinburg, Mira str., 19
Researcher ID: HGC-9578-2022
M. Y. Ananin
Ural Federal University
Russian Federation
Russian Federation
Ananin Mikhail Y., Ph.D. (Eng.), Associate Professor
620062, Yekaterinburg, Mira str., 19
Scopus: 57202286491,
Researcher ID: GWZ-3221-2022
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Review
For citations:
Istomin A.F., Ananin M.Y. Technological pipeline Structural design against PROGRESSIVE COLLAPSE through dynamic direct analysis. The Russian Automobile and Highway Industry Journal. 2025;22(5):804-821. (In Russ.) https://doi.org/10.26518/2071-7296-2025-22-5-804-821. EDN: FKZDHT
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