بررسی تأثیر ناکاملی های هندسی بر رفتار خرابی نبشی های تحت اثر نیروی فشاری در دکل های مشبک خطوط انتقال نیرو

نوع مقاله : مقاله کامل پژوهشی

نویسندگان

دانشکده مهندسی عمران، دانشگاه صنعتی سهند، تبریز

10.22034/ceej.2024.60562.2329

چکیده

نبشی­ های فولادی، به­ عنوان یکی از مقاطع پرکاربرد در دکل­ های مشبک خطوط انتقال نیرو استفاده می­ شود. به ­کارگیری این نوع مقاطع و همچنین نحوه اتصالات آن­ ها در دکل‌های مشبک، باعث ایجاد خروج از مرکزیت در انتقال بار بین محل اتصال و محور طولی اصلی عضو می­گردد که بر نیروهای داخلی تأثیرگذار است. ازطرفی وجود لغزش اتصالات و انحنای اولیه در اعضا دکل، منجربه یک رفتار پیچیده، به ­ویژه برای اعضای تحت نیروی فشاری می­ شود. این نوع ناکاملی­ ها باعث کاهش ظرفیت در مقایسه با یک عضو ایده ­آل ساده تحت بارگذاری مرکزی می‌شود. با توجه به موارد فوق، به ­منظور مدل‌سازی و پیش ­بینی بهتر حالات خرابی دکل، ارائه رویکردی مناسب در مدل­سازی نبشی­ها ضروری است. در این مطالعه، با به ­کارگیری یک روش ساده در مدل­سازی اعضای نبشی، اثر ناکاملی­ های هندسی (خروج از مرکزیت، لغزش اتصالات و انحنای اولیه) بر روی رفتار خرابی نبشی­ های تحت نیروی فشاری بررسی شده است. برای مطالعه، نبشی ­ها به ­طور مجزا با اتصالات تک­ پیچه و دوپیچه و طول­ های متنوع تحت اثر نیروی فشاری محوری مدل­سازی شده، تحلیل ­های خرابی غیرخطی استاتیکی با استفاده از نرم ­افزار OpenSees انجام شده و سپس رفتار خرابی آن­ها با نتایج مطالعات آزمایشگاهی انجام یافته و ملاحظات مرتبط با آیین ‎نامه‎ های طراحی در این زمینه مقایسه شده است. نتایج مطالعه، حساسیت رفتار خرابی نبشی ­ها به ناکاملی­ ها را نشان داده و از طرفی روش مدل­سازی بکار گرفته شده، پیش ­بینی مناسبی از رفتار و ظرفیت باربری این نوع مقاطع را ارائه می­ دهد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Investigating Geometric Imperfection Effects on Failure of Steel Angles Under Compressive Force in Power Transmission Line Lattice Towers

نویسندگان [English]

  • Ali Asghar Zekavati
  • Karim Abedi
  • Mohammad Reza Chenaghlou
  • Mohammad Charkhtab Basim
Faculty of Civil Engineering, Sahand University of Technology, Tabriz, Iran
چکیده [English]

This paper presents a study of the behavior of single-angle compression members connected through one leg only with single and double-bolted connections. Non-linear finite element simulations with OpenSees software have been performed, and the results are compared with experimental tests conducted by other researchers. A comparison is also made with the strength predicted by major code provisions. The investigation aims to assess the effect of geometric imperfections, such as eccentricity, joint slippage, and initial crookedness, on the failure of steel angles under compressive force. This will be achieved by presenting a straightforward modeling method for the angle elements.

کلیدواژه‌ها [English]

  • Steel angle
  • Power transmission line lattice tower
  • Geometric imperfection
  • Eccentricity
  • Joint slippage
  • Initial crookedness

مراجع

AISC 360-22, “Specification for Structural Steel Buildings”, ANSI, Chicago, 2022.
ASCE 10-15, “Design of latticed steel transmission structures, ASCE/SEI 10-15”, American Society of Civil Engineers, Reston, Virginia, 2015.
Asgarian B, Dadras Eslamlou S, Zaghi AE, Mehr M, “Progressive collapse analysis of power transmission towers”, Journal of Constructional Steel Research, 2016, 123, 31-40. https://doi.org/10.1016/j.jcsr.2016.04.021
Balagopal R, Ramaswamy A, Palani GS, Prasad Rao N, “Simplified bolted connection model for analysis of transmission line towers”, Structures, 2020, 27, 2114-2125. https://doi.org/10.1016/j.istruc.2020.08.029
Bathon L, Mueller WH, Kempner L, “Ultimate load capacity of single steel angles”, Journal of Structural Engineering, 1993, 119 (1), 279-300. https://doi.org/10.1061/(ASCE)0733-9445(1993)119:1(279)
Bernard ES, Coleman R, Bridge RQ, “Measurement and assessment of geometric imperfections in thin-walled panels”, Thin-Walled Structures, 1999, 33 (2), 103-126. https://doi.org/10.1016/S0263-8231(98)00043-3
Bhilawe JV, “Study of equal angle subjected to compression for bolted end connection”, Journal of The Institution of Engineers (India): Series A, 2017, 99 (1), 123-132. https://doi.org/10.1007/s40030-017-0245-8
Bruno L, Sassone M, Venuti F, “Effects of the equivalent geometric nodal imperfections on the stability of single layer grid shells”, Engineering Structures, 2016, 112, 184-199. https://doi.org/10.1016/j.engstruct.2016.01.017
Chan SL, Zhou ZH, Chen WF, Peng JL, Pan AD, “Stability analysis of semirigid steel scaffolding”, Engineering Structures, 1995, 17 (8), 568-574. https://doi.org/10.1016/0141-0296(95)00011-U
Chen X, Shen SZ, “Complete load-deflection response and initial imperfection analysis of single-layer lattice dome”, International Journal of Space Structures, 1993, 8 (4), 271-278. https://doi.org/10.1177/026635119300800405
Conde B, Villarino A, Cabaleiro M, Gonzalez-Aguilera D, “Geometrical issues on the structural analysis of transmission electricity towers thanks to laser scanning technology and finite element method”, Remote Sensing, 2015, 7 (9), 11551-11569. https://doi.org/10.3390/rs70911551
CSA S16-19, “Design of steel structures”, CSA Group, Toronto, 2019.
Deng HZ, Huang B, “Study on ultimate bearing capacity of main member in transmission tubular tower leg”, Thin-Walled Structures, 2018, 127, 51-61. https://doi.org/10.1016/j.tws.2018.01.025
EN 1993-1-6, “Eurocode 3: design of steel structures-part 1-6: strength and stability of shell structures”, European Committee for Standardization, Brussels, 2007.
EN 1993-3-1, “Eurocode 3: Design of steel structures-Part 3-1: Towers, masts and chimneys-Towers and masts”, CEN, Brussels, 2006.
Fu X, Li H, “Uncertainty analysis of the strength capacity and failure path for a transmission tower under a wind load”, Journal of Wind Engineering and Industrial Aerodynamics, 2018, 173, 147-155. https://doi.org/10.1016/j.jweia.2017.12.009
Fu X, Li HN, Li G, “Fragility analysis and estimation of collapse status for transmission tower subjected to wind and rain loads”, Structural Safety, 2016, 58, 1-10. https://doi.org/10.1016/j.strusafe.2015.08.002
Fu X, Wang J, Li H, Li JX, Yang LD, “Full-scale test and its numerical simulation of a transmission tower under extreme wind loads”, Journal of Wind Engineering and Industrial Aerodynamics, 2019, 190, 119-133. https://doi.org/10.1016/j.jweia.2019.04.011
He S, Jiang Z, Cai J, “Investigation on simulation methods of initial geometric imperfection distribution in elasto-plastic stability analysis of single-layer reticulated shells”, KSCE Journal of Civil Engineering, 2017, 22 (4), 1193-1202. https://doi.org/10.1007/s12205-017-0879-0
Huseyin K, Mandadi V, “On the imperfection sensitivity of compound branching”, Ingenieur-Archiv, 1977, 46 (4), 213-222. https://doi.org/10.1007/BF00536957
Jiang W, Liu YP, Chan SL, Wang ZQ, “Direct analysis of an ultrahigh-voltage lattice transmission tower considering joint effects”, Journal of Structural Engineering, 2017, 143 (5). https://doi.org/10.1061/(ASCE)ST.1943-541X.0001736
JGJ 7, “Technical Specification for Space Frame Structures”, China Architecture Industry Press, Beijing, 2010.
Kettler M, Lichtl G, Unterweger H, “Experimental tests on bolted steel angles in compression with varying end supports”, Journal of Constructional Steel Research, 2019, 155, 301-315. https://doi.org/10.1016/j.jcsr.2018.12.030
Kiessling F, Nefzger P, Nolasco JF, Kaintzyk U, “Overhead power lines: Planning, design, construction”, 2003rd ed. Berlin, Germany: Springer, 2014.
Koiter WT, “On the stability of elastic equilibrium”, National Aeronautics and Space Administration, 1967.
Lee PS, McClure G, “Elastoplastic large deformation analysis of a lattice steel tower structure and comparison with full-scale tests”, Journal of Constructional Steel Research, 2007, 63 (5), 709-717. https://doi.org/10.1016/j.jcsr.2006.06.041
Mahmoudi A, Jafari MA, Nasrollahzadeh K, “Reliability-based approach for fragility analysis of lattice transmission tower in the type test”, Scientia Iranica, 2022, 29 (3), 1125-1141. https://doi.org/10.24200/sci.2021.58347.5683
Mohammadi Darestani Y, Shafieezadeh A, Cha K, “Effect of modelling complexities on extreme wind hazard performance of steel lattice transmission towers”, Structure and Infrastructure Engineering, 2019, 16 (6), 898-915. https://doi.org/10.1080/15732479.2019.1673783
Pastor MM, Bonada J, Roure F, Casafont M, “Residual stresses and initial imperfections in non-linear analysis”, Engineering Structures, 2013, 46, 493-507. https://doi.org/10.1016/j.engstruct.2012.08.013
Prasad Rao N, Knight GMS, Mohan SJ, Lakshmanan N, “Studies on failure of transmission line towers in testing”, Engineering Structures, 2012, 35, 55-70. https://doi.org/10.1016/j.engstruct.2011.10.017
See T, McConnel RE, “Large displacement elastic buckling of space structures”, Journal of Structural Engineering, 1986, 112 (5), 1052-1069. https://doi.org/10.1061/(ASCE)0733-9445(1986)112:5(1052)
Selvaraj S, Madhavan M, “Geometric imperfection measurements and validations on cold-formed steel channels using 3D noncontact laser scanner”, Journal of Structural Engineering, 2018, 144 (3), 04018010. https://doi.org/10.1061/(ASCE)ST.1943-541X.0001993
Tian L, Guo L, Qu B, “Single-angle compression members with both legs bolted at the ends: Design implications from an experimental study”, Journal of Structural Engineering, 2018, 144 (9). https://doi.org/10.1061/(ASCE)ST.1943-541X.0002158
Tian L, Pan H, Ma R, Zhang L, Liu Z, “Full-scale test and numerical failure analysis of a latticed steel tubular transmission tower”, Engineering Structures, 2020, 208, 109919. https://doi.org/10.1016/j.engstruct.2019.109919
Ungkurapinan N, Chandrakeerthy SRDeS, Rajapakse RKND, Yue SB, “Joint slip in steel electric transmission towers”, Engineering Structures, 2003, 25 (6), 779-788. https://doi.org/10.1016/S0141-0296(03)00003-8
Uriz P, Filippou FC, Mahin SA, “Model for cyclic inelastic buckling of steel braces”, Journal of Structural Engineering, 2008, 134 (4), 619-628. https://doi.org/10.1061/(ASCE)0733-9445(2008)134:4(619)
Von Karman TH, Dunn LG, Tsien HS, “The influence of curvature on the buckling characteristics of structures”, Journal of the Aeronautical Sciences, 1940, 7 (7), 276-289. https://doi.org/10.2514/8.1123
Wang J, Li HN, Fu X, Dong ZQ, Sun ZG, “Wind fragility assessment and sensitivity analysis for a transmission tower-line system”, Journal of Wind Engineering and Industrial Aerodynamics, 2022, 231, 105233. https://doi.org/10.1016/j.jweia.2022.105233
Wang J, Li HN, Fu X, Li Q, “Geometric imperfections and ultimate capacity analysis of a steel lattice transmission tower”, Journal of Constructional Steel Research, 2021, 183, 106734. https://doi.org/10.1016/j.jcsr.2021.106734
Zhang J, Xie Q, “Failure analysis of transmission tower subjected to strong wind load”, Journal of Constructional Steel Research, 2019, 160, 271-279. https://doi.org/10.1016/j.jcsr.2019.05.041
Zhou Z, Wu J, Meng S, “Influence of member geometric imperfection on geometrically nonlinear buckling and seismic performance of suspen-dome structures”, International Journal of Structural Stability and Dynamics, 2014, 14 (3), 1350070. https://doi.org/10.1142/S0219455413500703
نشریه مهندسی عمران و محیط زیست
دوره 55، شماره 118 - شماره پیاپی 118
بهار 1404
خرداد 1404
صفحه 53-67

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