Investigation of the Dynamic Behavior of Buried Natural Gas Pipe System

Year 2025, Volume: 29 Issue: 4, 460 - 470, 31.08.2025

Kaşif Furkan Öztürk

https://doi.org/10.16984/saufenbilder.1630228

Abstract

Natural gas pipelines are important infrastructure elements that are often designed to be buried and can cross very long distances, both on the mainland and on the ocean seabed. In this context, researches on the safety of these structures, which are known to cause significant economic losses if damaged, still maintains its importance. From this point of view, the dynamic behavior of a buried pipe system modeled using the equivalent spring-dashpot approach is investigated for three different soil systems and two earthquake records with three different frequency contents. The research shows that while the peak von mises stress of the pipe system can generally decrease depending on decrease in soil stiffness, the peak lateral displacements of the pipe system can generally increase depending on the decrease in soil stiffness. Furthermore, the results point out that the peak von mises stresses and the lateral displacements of the pipe system can significantly increase from high frequency content to low frequency content depending on the frequency content of earthquake.

Keywords

Equivalent spring-dashpot model , FEM , Frequency content of earthquake , Soil-pipe interaction

References

• E. O. Unal, S. Kocaman, C. Gokceoglu, “Impact assessment of geohazards triggered by 6 February 2023 Kahramanmaras Earthquakes (Mw 7.7 and Mw 7.6) on the natural gas pipelines,” Engineering Geology, vol. 334, p. 107508, 2024.
• T. K. Datta, Seismic analysis of structures. Chichester, UK: John Wiley & Sons, 2010.
• A. Hindy, M. Novak, “Earthquake response of underground pipelines,” Earthquake Engineering & Structural Dynamics, vol. 7, no. 5, pp. 451–476, 1979.
• A. Hindy, M. Novak, “Pipeline Response to Random Ground Motion,” Journal of the Engineering Mechanics Division, vol. 106, no. 2, pp. 339–360, 1980.
• T. K. Datta, E. A. Mashaly, “Pipeline response to random ground motion by discrete model,” Earthquake Engineering & Structural Dynamics, vol. 14, no. 4, pp. 559–572, 1986
• X. Liu, H. Zhang, O. Ndubuaku, M. Xia, J. J. Roger Cheng, Y. Li, S. Adeeb, “Effects of stress–strain characteristics on local buckling of X80 pipe subjected to strike-slip fault movement,” Journal of Pressure Vessel Technology, vol. 140, no. 4, 2018.
• D. K. Karamitros, G. D. Bouckovalas, G. P. Kouretzis, V. Gkesouli, “An analytical method for strength verification of buried steel pipelines at normal fault crossings,” Soil Dynamics and Earthquake Engineering, vol. 31, no. 11, pp. 1452–1464, 2011.
• X. Liu, H. Zhang, K. Wu, M. Xia, Q. Zheng, Y. Li, O. Ndubuaku, S. Adeeb, “A refined analytical strain analysis method for offshore pipeline under strike-slip fault movement considering strain hardening effect of steel,” Ships and Offshore Structures, vol. 15, no. 2, pp. 215–226, 2020.
• L. Xu, X. Cheng, R. Huang, W. Chen, W. Hu, “Local buckling behavior of buried pipeline under seismic oblique-reverse fault displacement,” Scientific Reports, vol. 12, no. 1, pp. 1–17, 2022.
• K. F. Ozturk, “Investigation of the effects of mainshock-aftershock sequences on the dynamic responses of pipeline considering soil-pipeline interaction,” Tunnelling and Underground Space Technology, vol. 155, no. P2, p. 106231, 2025.
• H. Pan, H.-N. Li, C. Li, “Seismic behaviors of free-spanning submarine pipelines subjected to multi-support earthquake motions within offshore sites,” Ocean Engineering, vol. 237, no. August, p. 109606, 2021.
• I. Anastasopoulos, N. Gerolymos, V. Drosos, T. Georgarakos, R. Kourkoulis, G. Gazetas, “Behaviour of deep immersed tunnel under combined normal fault rupture deformation and subsequent seismic shaking,” Bulletin of Earthquake Engineering, vol. 6, no. 2, pp. 213–239, 2008.
• I. Anastasopoulos, N. Gerolymos, V. Drosos, R. Kourkoulis, T. Georgarakos, G. Gazetas, “Nonlinear response of deep immersed tunnel to strong seismic shaking,” Journal of Geotechnical and Geoenvironmental Engineering, vol. 133, no. 9, pp. 1067–1090, 2007.
• M. R. Kianoush, A. R. Ghaemmaghami, “The effect of earthquake frequency content on the seismic behavior of concrete rectangular liquid tanks using the finite element method incorporating soil–structure interaction,” Engineering Structures, vol. 33, no. 7, pp. 2186–2200, 2011.
• T. Cakir, “Evaluation of the effect of earthquake frequency content on seismic behavior of cantilever retaining wall including soil–structure interaction,” Soil Dynamics and Earthquake Engineering, vol. 45, pp. 96–111, 2013.
• D. Van Nguyen, D. Kim, D. Duy Nguyen, “Nonlinear seismic soil-structure interaction analysis of nuclear reactor building considering the effect of earthquake frequency content,” Structures, vol. 26, no. December 2019, pp. 901–914, 2020.
• O. Araz, T. Cakir, K. F. Ozturk, “Effect of earthquake frequency content on seismic-induced vibration control of structures equipped with tuned mass damper,” Journal of the Brazilian Society of Mechanical Sciences and Engineering, vol. 44, no. 12, p. 584, 2022.
• K. F. Ozturk, T. Cakir, O. Araz, “A comparative study to determine seismic response of the box culvert wing wall under influence of soil-structure interaction considering different ground motions,” Soil Dynamics and Earthquake Engineering, vol. 162, no. August, p. 107452, 2022.
• K. F. Ozturk, T. Cakir, O. Araz, “Influences of wall configurations on earthquake behavior of cantilever retaining walls considering soil-structure interaction effects,” Journal of Earthquake and Tsunami, vol. 17, no. 01, 2023.
• ANSYS Inc, “ANSYS Mechanical APDL [Computer Software],” 2015, ANSYS Inc., Conansburg.
• H. Pan, H-N. Li, C. Li, L. Tian, “Parametric study on seismic behaviors of a buried pipeline subjected to underground spatially correlated earthquake motions,” Journal of Earthquake Engineering, vol. 26, no. 12, pp. 6329–6351, Sep. 2022.
• H. Shakib, V. Jahangiri, “Intensity measures for the assessment of the seismic response of buried steel pipelines,” Bulletin of Earthquake Engineering, vol. 14, no. 4, pp. 1265–1284, Apr. 2016.
• V. Jahangiri, H. Shakib, “Seismic risk assessment of buried steel gas pipelines under seismic wave propagation based on fragility analysis,” Bulletin of Earthquake Engineering, vol. 16, no. 3, pp. 1571–1605, Mar. 2018.
• V. Jahangiri, H. Shakib, “Reliability-based seismic evaluation of buried pipelines subjected to earthquake-induced transient ground motions,” Bulletin of Earthquake Engineering, vol. 18, no. 8, pp. 3603–3627, Jun. 2020.
• C. M. St John, T. F. Zahrah, “Aseismic design of underground structures,” Tunnelling and Underground Space Technology incorporating Trenchless, vol. 2, no. 2, pp. 165–197, 1987.
• Pacific Earthquake Engineering Research (PEER) Center (2024). PEER ground motion database [Online]. Available: https://ngawest2.berkeley.edu