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<article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Structural Mechanics of Engineering Constructions and Buildings</journal-id><journal-title-group><journal-title xml:lang="en">Structural Mechanics of Engineering Constructions and Buildings</journal-title><trans-title-group xml:lang="ru"><trans-title>Строительная механика инженерных конструкций и сооружений</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1815-5235</issn><issn publication-format="electronic">2587-8700</issn><publisher><publisher-name xml:lang="en">Peoples’ Friendship University of Russia named after Patrice Lumumba (RUDN University)</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">32744</article-id><article-id pub-id-type="doi">10.22363/1815-5235-2022-18-4-341-350</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Analytical and numerical methods of analysis of structures</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Аналитические и численные методы расчета конструкций</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Experimental and numerical investigation of thin-walled I-section beam under bending and torsion</article-title><trans-title-group xml:lang="ru"><trans-title>Экспериментальное и численное исследование тонкостенных балок двутаврового сечения при изгибе и кручении</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7168-5786</contrib-id><name-alternatives><name xml:lang="en"><surname>Gebre</surname><given-names>Tesfaldet H.</given-names></name><name xml:lang="ru"><surname>Гебре</surname><given-names>Тесфалдет Хадгембес</given-names></name></name-alternatives><bio xml:lang="en"><p>research assistant, Department of Civil Engineering, Academy of Engineering</p></bio><bio xml:lang="ru"><p>ассистент, департамент строительства, Инженерная академия</p></bio><email>tesfaldethg@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2493-7255</contrib-id><name-alternatives><name xml:lang="en"><surname>Galishnikova</surname><given-names>Vera V.</given-names></name><name xml:lang="ru"><surname>Галишникова</surname><given-names>Вера Владимировна</given-names></name></name-alternatives><bio xml:lang="en"><p>Dr.Sc., Professor, Vice-Rector, Moscow State University of Civil Engineering (National Research University), Professor, Department of Civil Engineering, Peoples’ Friendship University of Russia (RUDN University)</p></bio><bio xml:lang="ru"><p>доктор технических наук, профессор, проректор, Национальный исследовательский Московский государственный строительный университет, профессор департамента строительства, Российский университет дружбы народов</p></bio><email>galishni@yandex.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3926-8701</contrib-id><name-alternatives><name xml:lang="en"><surname>Lebed</surname><given-names>Evgeny V.</given-names></name><name xml:lang="ru"><surname>Лебедь</surname><given-names>Евгений Васильевич</given-names></name></name-alternatives><bio xml:lang="en"><p>Candidate of Technical Science, Associate Professor of the Department of Metal and Wooden Structures</p></bio><bio xml:lang="ru"><p>кандидат технических наук, доцент, кафедра металлических и деревянных конструкций</p></bio><email>evglebed@mail.ru</email><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Peoples' Friendship University of Russia (RUDN University)</institution></aff><aff><institution xml:lang="ru">Российский университет дружбы народов</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Moscow State University of Civil Engineering (National Research University)</institution></aff><aff><institution xml:lang="ru">Национальный исследовательский Московский государственный строительный университет</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2022-11-30" publication-format="electronic"><day>30</day><month>11</month><year>2022</year></pub-date><volume>18</volume><issue>4</issue><issue-title xml:lang="en">VOL 18, NO4 (2022)</issue-title><issue-title xml:lang="ru">ТОМ 18, №4 (2022)</issue-title><fpage>341</fpage><lpage>350</lpage><history><date date-type="received" iso-8601-date="2022-11-30"><day>30</day><month>11</month><year>2022</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2022, Gebre T.H., Galishnikova V.V., Lebed E.V.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2022, Гебре Т.Х., Галишникова В.В., Лебедь Е.В.</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="en">Gebre T.H., Galishnikova V.V., Lebed E.V.</copyright-holder><copyright-holder xml:lang="ru">Гебре Т.Х., Галишникова В.В., Лебедь Е.В.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by-nc/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.rudn.ru/structural-mechanics/article/view/32744">https://journals.rudn.ru/structural-mechanics/article/view/32744</self-uri><abstract xml:lang="en"><p style="text-align: justify;">The aim of the research - to investigate the behavior of thin-walled beam I-section loaded with bending and torsion using theoretical, numerical, and experimental approaches. In this paper, the main criteria for consideration of the different methods of analysis is the geometric characteristic of the section. The results obtained by the finite element method, the numerical method, as well as experimental data are compared. The analysis by finite element method by considering an additional degree of freedom at a node to include the restrained torsion and the dimension of the stiffness matrix is thus 14×14. The results of the calculation according to this theory are compared with the numerical solution obtained using finite element software, and with the results of the experiment. The I-beam section subject to bending with torsion is considered. The deformations, strain, and stress distributions of open thin-walled structures subjected to bending and torsion are presented using experimental methods. The comparative results for the angle of twisting, deformations, and normal stresses in the frame element subjected to combined loading are displayed graphically. To evaluate the results, a theoretical, numerical, and experimental investigation of I-beam behavior under bending and restrained torsion was carried out. As a result of the comparison, it was revealed that the results obtained according to the refined theory proposed by the authors have good convergence with experimental data and are also quite close to the values obtained using commercial software.</p></abstract><trans-abstract xml:lang="ru"><p style="text-align: justify;">Цель работы - исследовать поведение тонкостенной балки I сечения, нагруженной изгибом и кручением, используя теоретические, численные и экспериментальные подходы. В данной работе основным критерием для рассмотрения различных методов анализа является геометрическая характеристика сечения. Сравниваются результаты, полученные методом конечных элементов, численным методом, а также экспериментальные данные. При анализе методом конечных элементов учитывается дополнительная степень свободы в узле для включения повторно деформированного кручения, таким образом, размерность матрицы жесткости составляет 14×14. Результаты расчета по данной теории сравниваются с численным решением, полученным с помощью программы конечных элементов, и с результатами эксперимента. Рассматривается двутавровое сечение балки, подверженной изгибу с кручением. Представлены деформации, напряжения и распределения напряжений открытых тонкостенных конструкций, подверженных изгибу и кручению, с использованием экспериментальных методов. Сравнительные результаты для угла закручивания, деформаций и нормальных напряжений в элементе рамы, подвергнутом комбинированному нагружению, отображены графически. Для оценки полученных результатов проведено теоретико-калькуляционное, численное и экспериментальное исследование поведения двутавровой балки при изгибе и ограниченном кручении. Выявлено, что результаты, полученные в соответствии с предложенной авторами уточненной теорией, имеют хорошую сходимость с экспериментальными данными и достаточно близки к значениям, полученным с помощью коммерческого программного обеспечения.</p></trans-abstract><kwd-group xml:lang="en"><kwd>experimental study</kwd><kwd>thin-walled sections</kwd><kwd>finite element method</kwd><kwd>combined loading</kwd><kwd>torsion</kwd><kwd>bending</kwd><kwd>warping torsion</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>экспериментальное исследование</kwd><kwd>тонкостенные профили</kwd><kwd>метод конечных элементов</kwd><kwd>комбинированная нагрузка</kwd><kwd>кручение</kwd><kwd>изгиб</kwd><kwd>деформирующее кручение</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Pavlenko A.D., Rybakov V.A., Pikht A.V., Mikhailov E.S. Non-uniform torsion of thin-walled open-section multi-span beams. Magazine of Civil Engineering. 2016;67(7):55-69. https://doi.org/10.5862/MCE.67.6</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Mysore R., Kissinger R. Finite element analysis of thin-walled beams subjected to torsion. In 30th Structures, Structural Dynamics and Materials Conference. 2012. https://doi.org/10.2514/6.1989-1176</mixed-citation></ref><ref id="B3"><label>3.</label><mixed-citation>Tusnin A.R., Prokic M. Experimental research of I-beams under bending and torsion actions. Magazine of Civil Engineering. 2015;53(1). https://doi.org/10.5862/MCE.53.3</mixed-citation></ref><ref id="B4"><label>4.</label><mixed-citation>Vatin N.I., Sinelnikov A.S. Strength and durability of thin-walled cross-sections. In: Jármai K., Farkas J. (eds.) Design, Fabrication and Economy of Metal Structures. Berlin, Heidelberg: Springer; 2013. https://doi.org/10.1007/978-3-642-36691-8_25</mixed-citation></ref><ref id="B5"><label>5.</label><mixed-citation>Tusnin A.R., Prokic M. Selection of parameters for I-beam experimental model subjected to bending and torsion. Procedia Engineering. 2015;111:789-796. https://doi.org/10.1016/j.proeng.2015.07.146</mixed-citation></ref><ref id="B6"><label>6.</label><mixed-citation>Bischoff M., Bletzinger K.-U., Wall W.A., Ramm E. Models and finite elements for thin-walled structures. Encyclopedia of Computational Mechanics. 2004. https://doi.org/10.1002/0470091355.ecm026</mixed-citation></ref><ref id="B7"><label>7.</label><mixed-citation>Saadé K., Espion B., Warzée G. Non-uniform torsional behavior and stability of thin-walled elastic beams with arbitrary cross sections. Thin-Walled Structures. 2004;42(6):857-881. https://doi.org/10.1016/j.tws.2003.12.003</mixed-citation></ref><ref id="B8"><label>8.</label><mixed-citation>Iu C.K., Chen W.F., Chan S.L., Ma T.W. Direct second-order elastic analysis for steel frame design. KSCE Journal of Civil Engineering. 2008;12(6):379-389. https://doi.org/10.1007/s12205-008-0379-3</mixed-citation></ref><ref id="B9"><label>9.</label><mixed-citation>Jin S., Li Z., Huang F., Gan D., Cheng R., Deng G. Constrained shell finite element method for elastic buckling analysis of thin-walled members. Thin-Walled Structures. 2019;145:106409. https://doi.org/10.1016/j.tws.2019.106409</mixed-citation></ref><ref id="B10"><label>10.</label><mixed-citation>Banić D., Turkalj G., Brnić J. Finite element stress analysis of elastic beams under non-uniform torsion. Transactions of Famena. 2016;40(2):71-82. https://doi.org/10.21278/TOF.40206</mixed-citation></ref><ref id="B11"><label>11.</label><mixed-citation>Vlasov V.Z. Thin-walled elastic beams. Virginia: National Technical Information Service; 1984. 493 p.</mixed-citation></ref><ref id="B12"><label>12.</label><mixed-citation>Wu L., Mohareb M. Finite element formulation for shear deformable thin-walled beams. Canadian Journal of Civil Engineering. 2011;38(4):383-392. https://doi.org/10.1139/L11-007</mixed-citation></ref><ref id="B13"><label>13.</label><mixed-citation>Aalberg A. An experimental study of beam-columns subjected to combined torsion, bending, and axial actions. Trondheim; 1995.</mixed-citation></ref><ref id="B14"><label>14.</label><mixed-citation>Gebre T.H., Galishnikova V.V. The impact of section properties on thin walled beam sections with restrained torsion. Journal of Physics: Conference Series. 2020;1687(1):012020. https://doi.org/10.1088/1742-6596/1687/1/012020</mixed-citation></ref><ref id="B15"><label>15.</label><mixed-citation>Galishnikova V., Gebre T.H. The behaviour of thin-walled beam with restrained torsion. Magazine of Civil Engineering. 2022;110(2). https://doi.org/10.34910/MCE.110.9</mixed-citation></ref><ref id="B16"><label>16.</label><mixed-citation>Silvestre N., Camotim D. Second-order generalised beam theory for arbitrary orthotropic materials. Thin-Walled Structures. 2002;40(9):91-820. https://doi.org/10.1016/S0263-8231(02)00026-5</mixed-citation></ref><ref id="B17"><label>17.</label><mixed-citation>Gebre T., Galishnikova V., Lebed E., Tupikova E., Awadh Z. Finite element analysis of 3D thin-walled beam with restrained torsion. Lecture Notes in Civil Engineering. 2022;282:359-369. https://doi.org/10.1007/978-3-031-10853-2_34</mixed-citation></ref><ref id="B18"><label>18.</label><mixed-citation>Bernardo D. New finite element for analysis of thin-walled structures. Journal of Structural Engineering. 2011;137(10):1153-1167. https://doi.org/10.1061/(asce)st.1943-541x.0000372</mixed-citation></ref><ref id="B19"><label>19.</label><mixed-citation>Lopez R.D.E.F. A 3D finite beam element for the modelling of composite wind turbine wings (Master of Science Thesis). Stockholm; 2013.</mixed-citation></ref><ref id="B20"><label>20.</label><mixed-citation>Gebre T., Galishnikova V., Tupikova E. Warping behavior of open and closed thin-walled sections with restrained torsion. Engineering Letters. 2022;30(1):1-8.</mixed-citation></ref><ref id="B21"><label>21.</label><mixed-citation>Cambronero-Barrientos F., Díaz-del-Valle J., Martínez-Martínez J.A. Beam element for thin-walled beams with torsion, distortion, and shear lag. Engineering Structures. 2017;43:571-588. https://doi.org/10.1016/j.engstruct.2017.04.020</mixed-citation></ref><ref id="B22"><label>22.</label><mixed-citation>Nguyen P.C., Kim S.E. An advanced analysis method for three-dimensional steel frames with semi-rigid connections. Finite Elements in Analysis and Design. 2014;80:23-32. https://doi.org/10.1016/j.finel.2013.11.004</mixed-citation></ref><ref id="B23"><label>23.</label><mixed-citation>Galishnikova V.V., Gebre T.H., Tupikova E.M., Niazmand M.A. The design guide for space frames with or without warping restraint at nodes. AIP Conference Proceedings.2022;2559(050016). https://doi.org/10.1063/5.0099013</mixed-citation></ref><ref id="B24"><label>24.</label><mixed-citation>Robertson I.N., Knapp R.H. Toward advanced analysis in steel frame design. Hawaii; 2003.</mixed-citation></ref><ref id="B25"><label>25.</label><mixed-citation>Tusnin A. Finite element for calculation of structures made of thin-walled open profile rods. Procedia Engineering. 2016;150:1673-1679. https://doi.org/10.1016/j.proeng.2016.07.149</mixed-citation></ref><ref id="B26"><label>26.</label><mixed-citation>Mohri F., Eddinari A., Damil N., Potier Ferry M. A beam finite element for non-linear analyses of thin-walled elements. Thin-Walled Structures. 2008;46(7-9):981-990. https://doi.org/10.1016/j.tws.2008.01.028</mixed-citation></ref><ref id="B27"><label>27.</label><mixed-citation>Gunnlaugsson G.A., Pedersen P.T. A finite element formulation for beams with thin walled cross-sections. Computers and Structures. 1982;15(6):691-699. https://doi.org/10.1016/S0045-7949(82)80011-4</mixed-citation></ref><ref id="B28"><label>28.</label><mixed-citation>Chen H.H., Lin W.Y., Hsiao K.M. Co-rotational finite element formulation for thin-walled beams with generic open section. Computer Methods in Applied Mechanics and Engineering. 2006;195(19-22):2334-2370.</mixed-citation></ref><ref id="B29"><label>29.</label><mixed-citation>Kugler S., Fotiu P., Murín J. On the access to transverse shear stiffnesses and to stiffness quantities for non-uniform warping torsion in FGM beam structures. Strojnicky Casopis. 2019;69(2):27-56. https://doi.org/10.2478/scjme-2019-0016</mixed-citation></ref><ref id="B30"><label>30.</label><mixed-citation>Lalin V., Rybakov V., Sergey A. The finite elements for design of frame of thin-walled beams. Applied Mechanics and Materials. 2014;578-579:858-863. https://doi.org/10.4028/www.scientific.net/AMM.578-579.858</mixed-citation></ref><ref id="B31"><label>31.</label><mixed-citation>Lalin V.V., Rybakov V.A., Ivanov S.S., Azarov A.A. Mixed finite-element method in V.I. Slivker’s semi-shear thin-walled bar theory. Magazine of Civil Engineering. 2019;89(5):79-93.</mixed-citation></ref></ref-list></back></article>
