تأثیر اتصال انعطاف‌پذیر بر کاهش آسیب‌های لوله‌های مدفون گاز ناشی از جابه‌جایی زمین

نوع مقاله : مقاله پژوهشی (کاربردی)

نویسنده

دکتری، گروه مهندسی عمران و معماری، آموزشکده شهیدچمران، دانشگاه فنی و حرفه ای استان گلستان، ایران.

چکیده

یکی از معضلات مهم صنعت نفت و گاز، ایمن‌نگه‌داشتن لوله‌های مدفون فلزی ناشی از پدیده گسلش می‌باشد. در این مقاله به بررسی یک راهکار برای ایمن‌نگه‌داشتن لوله‌های مدفون پرداخته می‌شود. اتصالات موجی‌شکل با تغییر شکل موضعی خود باعث ایجاد مفصل دورانی در یک ناحیه محدود می‌گردند؛ به‌طوری که سایر قسمت‌های لوله، سالم باقی می‌ماند. برای مدل‌سازی رفتار لوله مدفون ناشی از جابه‌جایی گسل راستا لغز، نرم‌افزار آباکوس به خدمت گرفته شده است. برای تأیید اعتبار نتایج مدل عددی، علکرد لوله ناشی از جابه‌جایی محوری بزرگ با نتایج آزمایشگاهی موجود در مقاله‌ای معتبر، مقایسه و صحت‌سنجی شده است. با بررسی نتایج عددی، وجود اتصال موجی می‌تواند موجب عملکرد بسیار مطلوب لوله در از بین بردن ناحیه کمانشی و کاهش مقادیر کرنش پلاستیک حدوداً 80 درصدی شود.

کلیدواژه‌ها


عنوان مقاله [English]

The effect of flexible connection on reducing the damage of buried gas pipes due to ground displacement

نویسنده [English]

  • SeyedMohamad SeyedKolbadi
PhD, Department of Civil and Architecture Engineering, Faculty of Shahid Chamran, Golestan Branch, Technical and Vocational University (TVU),Gorgan, Iran.
چکیده [English]

One of the major challenges for the oil and gas industry is to keep buried metal pipes safe from faulting. This article discusses a solution to keep buried pipes safe. Wave-shaped joints, by their local deformation, create a rotational joint in a limited area so that other parts of the pipe remain intact. Abacus software was used to model the behavior of buried pipes due to slip direction fault displacement. In order to confirm the validity of the results of the numerical model, the pipe performance due to large axial displacement was compared and validated with the experimental results. An examination of the numerical results indicated that the presence of a wave connection can lead to a very good performance of the pipe in eliminating the buckling area and reducing the amount of plastic strain by approximately 80%.

کلیدواژه‌ها [English]

  • Buried gas pipeline
  • flexible connection
  • fault displacement
  • pipe buckling
  • ductility capacity
[1] O’Rourke, M. J., & Liu, X. (2012). Seismic design of buried and offshore pipelines. MCEER. https://www.eng.buffalo.edu/mceer-reports/12/12-MN04.pdf
[2] Newmark, N. M., & Hall, W. J. (1975,  June 18-20). Pipeline Design to Resist Large Fault Displacement. Proceedings of US national conference on earthquake engineering, Ann Arbor Michigan.
[3] Kennedy, R. P., Williamson, R. A., & Chow, A. M. (1977). Fault Movement Effects on Buried Oil Pipeline. Transportation Engineering Journal of ASCE, 103(5), 617-633. https://doi.org/10.1061/TPEJAN.0000659
[4] Vazouras, P., Karamanos, S. A., & Dakoulas, P. (2012). Mechanical behavior of buried steel pipes crossing active strike-slip faults. Soil Dynamics and Earthquake Engineering, 41, 164-180. https://doi.org/10.1016/j.soildyn.2012.05.012
[5] Kaya, E. S., Uckan, E., O'Rourke, M. J., Karamanos, S. A., Akbas, B., Cakir, F., & Cheng, Y. (2017). Failure analysis of a welded steel pipe at Kullar fault crossing. Engineering Failure Analysis, 71, 43-62. https://doi.org/10.1016/j.engfailanal.201 6.10.004
[6] Eidinger, J. M., O’Rourke, M., & Bachhuber, J. (2002, July 21-25). Performance of pipelines at fault crossings. Proceedings, 7th US National Conference on Earthquake Engineering, Boston, Massachusetts. http://www.geengineeringsystem s.com/ewExternalFiles/PipeFaultOffset.PDF
[7] Reid, S. R. (1993). Plastic deformation mechanisms in axially compressed metal tubes used as impact energy absorbers. International Journal of Mechanical Sciences, 35(12), 1035-1052. https://doi.org/10.1016/0020-7403(93)90054-X
[8] Tutuncu, I. (2001). Compressive load and buckling response of steel pipelines during earthquakes. Cornell University. https://books.google.com/books/about/Compressi ve_Load_and_Buckling_Response_o.html?id=oFpUAAAAYAAJ
[9] Bardi, F. C., & Kyriakides, S. (2006). Plastic buckling of circular tubes under axial compression—part I: Experiments. International Journal of Mechanical Sciences, 48(8), 830-841. https://doi.org/10.1016/j.ijmecsci.2006.03.005
[10] Kyriakides, S., & Ju, G. T. (1992). Bifurcation and localization instabilities in cylindrical shells under bending—I. Experiments. International Journal of Solids and Structures, 29(9), 1117-1142. https://doi.org/10.1016/0020-7683(92)90139-K
[11] Karamanos, S. A., & Tassoulas, J. L. (1996). Tubular Members. II: Local Buckling and Experimental Verification. Journal of Engineering Mechanics, 122(1), 72-78. https://doi.org/10.1061/(ASCE)0733-9399(1996)122:1(72)
[12] Gantes, C. J., & Melissianos, V. E. (2016). Evaluation of Seismic Protection Methods for Buried Fuel Pipelines Subjected to Fault Rupture. Frontiers in Built Environment, 2(34), 12. https://doi.org/10.3389/fbuil.2016.00034
[13] McClymont, A., Ernst, E., Bauman, P., & Payne, N. (2016, September 26–30). Integrating Geophysical and Geotechnical Engineering Methods for Assessment of Pipeline Geohazards. 11th International Pipeline Conference, Calgary, Alberta, Canada https://doi.org/10.1115/IPC2016-64222
[14] Tvergaard, V., & Needleman, A. (1981). On localized thermal track buckling. International Journal of Mechanical Sciences, 23(10), 577-587. https://doi.org/10. 1016/0020-7403(81)90038-2
[15] Brazier, L. G., & Southwell, R. V. (1927). On the flexure of thin cylindrical shells and other "thin" sections. Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character, 116(773), 104-114. https://doi.org/10.1098/rspa.1927.0125
[16] Timoshenko, S. P., & Gere, J. M. (2009). Theory of Elastic Stability. Dover Publications. https://books.google.com/books?id=rAk_AwAAQBAJ
[17] Hu, L., & Yuan, S. (2012). Plastic deformation analysis of thin-walled tube bending under internal pressure. Jixie Gongcheng Xuebao(Chinese Journal of Mechanical Engineering), 48(14), 78-83.
[18] Joshi, S., Prashant, A., Deb, A., & Jain, S. K. (2011). Analysis of buried pipelines subjected to reverse fault motion. Soil Dynamics and Earthquake Engineering, 31(7), 930-940. https://doi.org/10.1016/j.soildyn.2011.02.003
[19] Wham, B. P., Pariya-Ekkasut, C., Argyrou, C., Stack, M., O’Rourke, T. D., Stewart, H. E., Nakazono, H., & Hasegawa, N. (2017). Large Axial Deformation Performance of Steel Pipeline Designed for Fault Crossings. In Pipelines 2017. https://doi.org/10.1061/9780784480878.010
[20] American Lifelines Alliance. (2001). Guidelines for the Design  of Buried Steel Pipe. A. S. o. C. E. (ASCE). https://www.americanlifelinesalliance.com/pdf/Update0613 05.pdf
[21] Engineer, T. A. S. O. M. (2013). Gas Transmission andDistribution PipingSystems (ASME B31.8-2012). https://www.asme.org/getmedia/9d6dc116-b4b3-4dee-9bb2-83fb0055e3c6/33700.pdf
[22] Engineers, T. A. S. o. M. (2002). Pipeline transportation systems for liquid hydrocarbons and other liquids (ASME 831.4-2002). https://www.asme.org/learni ng-development/find-course/asme-b31-4-pipeline-transportation-systems-liquid-hydrocarbons-liquids-(1)/online--mar-21-22nd--2022