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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">37218</article-id><article-id pub-id-type="doi">10.22363/1815-5235-2023-19-5-450-458</article-id><article-id pub-id-type="edn">DTILTG</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Analysis and design of building structures</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Расчет и проектирование строительных 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">Influence of the size of the upper ring on the stressed state of the ribbed-ring metal dome</article-title><trans-title-group xml:lang="ru"><trans-title>Влияние размера верхнего кольца на напряженное состояние ребристо-кольцевого металлического купола</trans-title></trans-title-group></title-group><contrib-group><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>PhD in Engineering, Associate Professor in the Department of Metal and Wooden Structures</p></bio><bio xml:lang="ru"><p>кандидат технических наук, доцент кафедры металлических и деревянных конструкций</p></bio><email>evglebed@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Moscow State University of Civil Engineering</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="2023-12-15" publication-format="electronic"><day>15</day><month>12</month><year>2023</year></pub-date><volume>19</volume><issue>5</issue><issue-title xml:lang="en">VOL 19, NO5 (2023)</issue-title><issue-title xml:lang="ru">ТОМ 19, №5 (2023)</issue-title><fpage>450</fpage><lpage>458</lpage><history><date date-type="received" iso-8601-date="2023-12-28"><day>28</day><month>12</month><year>2023</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2023, Lebed E.V.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2023, Лебедь Е.В.</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="en">Lebed E.V.</copyright-holder><copyright-holder xml:lang="ru">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/37218">https://journals.rudn.ru/structural-mechanics/article/view/37218</self-uri><abstract xml:lang="en"><p style="text-align: justify;">Studies of several metal ribbed-ring large-span domes on computer models have been carried out. All elements of the dome frames are made of steel I-beams. The dome frames have the same number of ribs and rings, but they have different size of the upper ring. The frame elements cross-sections are oriented normally to the dome surfaces, with the exception of the upper ring. The joints of the frame elements with each other are assumed to be rigid in the normal direction and hinged in the tangential direction. The frames are mounted on support nodes at the level of the lower ring pivotally. All the domes are subjected to the same nodal loads from the weight of the enclosing structures and the weight of snow. The snow load is assumed to be asymmetrical, located only on one side of the dome. Under the combined action of these loads, the dimensions of the upper ring of the domes influence the stress-strain state of their frames. As a result of the research, graphs have been generated representing the stress level in the meridional ribs and in the upper rings of the domes. The conclusion has been made that the stress state of metal dome frames depends on the size of the upper ring. The necessity of increasing the cross-section of the upper ring with an increase in its size has been noted.</p></abstract><trans-abstract xml:lang="ru"><p style="text-align: justify;">Выполнены исследования нескольких ребристо-кольцевых металлических большепролетных куполов на компьютерных моделях. Все элементы купольных каркасов приняты из стальных двутавров. Купольные каркасы имеют одинаковое количество ребер и колец, но отличаются друг от друга размером верхнего кольца. Сечения элементов каркасов ориентированы нормально к купольным поверхностям, за исключением верхнего кольца. Сопряжения элементов каркаса друг с другом приняты жесткими в нормальном направлении и шарнирными в тангенциальном направлении. Каркасы установлены на опорные узлы в уровне нижнего кольца шарнирно. На все купола приложены одинаковые узловые нагрузки от веса ограждающих конструкций и веса снега. Снеговая нагрузка принята несимметричной, расположенной только с одной стороны купола. При совместном действии этих нагрузок размеры верхнего кольца куполов отражаются на напряженно-деформированном состоянии их каркасов. В результате исследований построены графики, отражающие уровень напряжений в меридиональных ребрах и в верхних кольцах куполов. Сделан вывод о зависимости напряженного состояния каркасов металлических куполов от размеров верхних колец. Отмечена необходимость увеличения сечения верхнего кольца с увеличением его размера.</p></trans-abstract><kwd-group xml:lang="en"><kwd>ribbed-ring dome</kwd><kwd>meridional rib</kwd><kwd>upper ring</kwd><kwd>computer model</kwd><kwd>statical calculations</kwd><kwd>stress state</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>ребристо-кольцевой купол</kwd><kwd>меридиональное ребро</kwd><kwd>верхнее кольцо</kwd><kwd>компьютерная модель</kwd><kwd>статический расчет</kwd><kwd>напряженное состояние</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">Tur V.I. Dome Structures: Morphogenesis, Analysis, Design, Increase in Effectiveness. Moscow: ASV Publ.; 2004. (In Russ.) ISBN 5-93093-249-2</mixed-citation><mixed-citation xml:lang="ru">Тур В.И. Купольные конструкции: формообразование, расчет, конструирование, повышение эффективности: М.: Изд-во АСВ. 2004. 96 c. 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