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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">37680</article-id><article-id pub-id-type="doi">10.22363/1815-5235-2023-19-6-583-592</article-id><article-id pub-id-type="edn">TSSFHP</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Theory of thin elastic shells</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Теория тонких оболочек</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">Buckling of Steel Conical Panels Reinforced with Stiffeners</article-title><trans-title-group xml:lang="ru"><trans-title>Устойчивость стальных конических панелей, усиленных ребрами жесткости</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9490-7364</contrib-id><name-alternatives><name xml:lang="en"><surname>Semenov</surname><given-names>Alexey A.</given-names></name><name xml:lang="ru"><surname>Семенов</surname><given-names>Алексей Александрович</given-names></name></name-alternatives><bio xml:lang="en"><p>Candidate of Technical Science, Associate Professor of the Department of Information Systems and Technologies</p></bio><bio xml:lang="ru"><p>кандидат технических наук, доцент кафедры информационных систем и технологий</p></bio><email>sw.semenov@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6174-5565</contrib-id><name-alternatives><name xml:lang="en"><surname>Kondratieva</surname><given-names>Lidiia N.</given-names></name><name xml:lang="ru"><surname>Кондратьева</surname><given-names>Лидия Никитовна</given-names></name></name-alternatives><bio xml:lang="en"><p>Doctor of Technical Science, Professor of the Department of Geotechnical Engineering</p></bio><bio xml:lang="ru"><p>доктор технических наук, профессор кафедры геотехники</p></bio><email>kondratjevaln@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9912-506X</contrib-id><name-alternatives><name xml:lang="en"><surname>Glukhikh</surname><given-names>Vladimir N.</given-names></name><name xml:lang="ru"><surname>Глухих</surname><given-names>Владимир Николаевич</given-names></name></name-alternatives><bio xml:lang="en"><p>Doctor of Technical Science, Professor of the Department of Structural Mechanics</p></bio><bio xml:lang="ru"><p>доктор технических наук, профессор кафедры строительной механики</p></bio><email>vnglukhikh@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Saint Petersburg State University of Architecture and Civil Engineering</institution></aff><aff><institution xml:lang="ru">Санкт-Петербургский государственный архитектурно-строительный университет</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2023-12-15" publication-format="electronic"><day>15</day><month>12</month><year>2023</year></pub-date><volume>19</volume><issue>6</issue><issue-title xml:lang="en">VOL 19, NO6 (2023)</issue-title><issue-title xml:lang="ru">ТОМ 19, №6 (2023)</issue-title><fpage>583</fpage><lpage>592</lpage><history><date date-type="received" iso-8601-date="2024-01-30"><day>30</day><month>01</month><year>2024</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2023, Semenov A.A., Kondratieva L.N., Glukhikh V.N.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2023, Семенов А.А., Кондратьева Л.Н., Глухих В.Н.</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="en">Semenov A.A., Kondratieva L.N., Glukhikh V.N.</copyright-holder><copyright-holder xml:lang="ru">Семенов А.А., Кондратьева Л.Н., Глухих В.Н.</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/37680">https://journals.rudn.ru/structural-mechanics/article/view/37680</self-uri><abstract xml:lang="en"><p style="text-align: justify;">Conical shells and their panels are important elements of building structures, but have not been studied sufficiently. This paper explores buckling of truncated steel conical panels reinforced with an orthogonal grid of stiffener plates. The panels are simply supported and are subjected to external uniformly distributed transverse load acting normal to the surface. A geometrically nonlinear mathematical model that takes into account lateral shearing is used. Two options of describing the effect of stiffener plates are considered: the refined discrete method and the method of structural anisotropy (the stiffness of the plates is “smeared”). The computational algorithm is based on the Ritz method and the method of continuing the solution using the best parameter. The algorithm is implemented using Maple analytical computing software. The values of critical buckling loads were obtained for two cases of conical panels with different stiffener options. The load-deflection curves are presented. The convergence of the methods for describing the effect of stiffeners with the increase in their number is discussed. It was found that for conical panels, when choosing a small number of unknown coefficients in the approximation, the value of the critical load may be “overshot”, and it is necessary to select a larger number of unknowns compared to cylindrical panels or flat shells of double curvature.</p></abstract><trans-abstract xml:lang="ru"><p style="text-align: justify;">Конические оболочки и их панели являются важными элементами строительных конструкций, однако изучены еще недостаточно. В работе представлено исследование устойчивости стальных усеченных конических панелей, подкрепленных ортогональной сеткой ребер жесткости. Конструкции закреплены шарнирно-неподвижно и находятся под действием внешней равномерно распределенной поперечной нагрузки, действующей по нормали к поверхности. Используется геометрически нелинейная математическая модель, учитывающая поперечные сдвиги. Учет ребер жесткости рассматривается в двух вариантах: по уточненному дискретному методу и методу конструктивной анизотропии (жесткость ребер «размазывается»). Расчетный алгоритм основан на методе Ритца и методе продолжения решения по наилучшему параметру. Программная реализация выполнена в среде аналитических вычислений Maple. Для двух вариантов конических панелей получены значения критических нагрузок потери устойчивости при разных вариантах подкрепления ребрами жесткости. Показаны графики зависимостей «нагрузка - прогиб». Сделаны выводы о сходимости методов учета ребер жесткости при увеличении числа подкрепляющих элементов. Выявлено, что для конических панелей при выборе в аппроксимации малого числа неизвестных коэффициентов возможно «проскакивание» значения критической нагрузки и необходимо выбирать большее число неизвестных по сравнению с цилиндрическими панелями или пологими оболочками двоякой кривизны.</p></trans-abstract><kwd-group xml:lang="en"><kwd>shells</kwd><kwd>conical panels</kwd><kwd>buckling</kwd><kwd>stiffeners</kwd><kwd>Ritz method</kwd><kwd>refined discrete method</kwd><kwd>structural anisotropy method</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>оболочки</kwd><kwd>конические панели</kwd><kwd>устойчивость</kwd><kwd>ребра жесткости</kwd><kwd>метод Ритца</kwd><kwd>уточненный дискретный метод</kwd><kwd>метод конструктивной анизотропии</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Krivoshapko S.N. Shell structures and shells at the beginning of the 21st century. 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