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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">38255</article-id><article-id pub-id-type="doi">10.22363/1815-5235-2024-20-1-14-26</article-id><article-id pub-id-type="edn">YPWZQU</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">Behavior of Metal Frame of Ribbed-ring Dome with Decrease in Number of Supporting Columns</article-title><trans-title-group xml:lang="ru"><trans-title>Работа металлического каркаса ребристо-кольцевого купола при уменьшении количества поддерживающих его колонн</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>Candidate of Technical Sciences, Associate Professor of 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="2024-03-15" publication-format="electronic"><day>15</day><month>03</month><year>2024</year></pub-date><volume>20</volume><issue>1</issue><issue-title xml:lang="en">VOL 20, NO1 (2024)</issue-title><issue-title xml:lang="ru">ТОМ 20, №1 (2024)</issue-title><fpage>14</fpage><lpage>26</lpage><history><date date-type="received" iso-8601-date="2024-03-15"><day>15</day><month>03</month><year>2024</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2024, Lebed E.V.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2024, Лебедь Е.В.</copyright-statement><copyright-year>2024</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/38255">https://journals.rudn.ru/structural-mechanics/article/view/38255</self-uri><abstract xml:lang="en"><p style="text-align: justify;">Investigation of the stress state of the metal frame of a ribbed-ring dome, when the number of supporting columns under it is gradually reduced. With that, the same distances or steps between the columns are maintained along the entire contour of the support ring. The main elements of the dome frame and columns are made of steel I-beams. Frames, the domes of which are supported by a different number of cyclically symmetrical columns, were considered as subjects of research. All the domes are characterized by the same geometric structure and size, the same cross sections of the same type of frame elements and are exposed to the same loads. The research was carried out on computer models by calculating the combined effect of the load from the weight of load-bearing and enclosing structures and an asymmetric snow load. The models with a reduced number of columns are obtained by regularly removing them from the original computer model. During the analysis, the stresses in the elements of the frames of all models were determined, which were compared with each other. Deformation graphs and comparative diagrams of the stress state relationships of the frame elements of the original and transformed models are obtained. An assessment of the change in the stress state of the ribbed-ring dome frame with a decrease in the number of columns is given. Significant changes in the stress state of the support ring were noted.</p></abstract><trans-abstract xml:lang="ru"><p style="text-align: justify;">Исследовалось напряженное состояние металлического каркаса ребристо-кольцевого купола, если под ним постепенно уменьшать количество поддерживающих колонн. При этом сохраняется одинаковость расстояний или шагов между колоннами по всему контуру опорного кольца. Основные элементы купольного каркаса и колонны приняты из стальных двутавров. В качестве объектов исследования рассматривались каркасы, купола которых опираются на разное количество циклически симметричных колонн. Все купола характеризуются одинаковым геометрическим строением и размером, одинаковыми сечениями однотипных элементов каркаса и подвержены воздействию одинаковых нагрузок. Исследования проводились на компьютерных моделях посредством расчетов на совместное действие нагрузки от веса несущих и ограждающих конструкций и несимметричной снеговой нагрузки. Модели с уменьшенным количеством колонн получены регулярным их удалением из исходной компьютерной модели. В процессе расчетов определялись напряжения в элементах каркасов всех моделей, которые сравнивались между собой. Получены графики деформаций, сравнительные диаграммы зависимостей напряженного состояния элементов каркасов исходной и преобразованных моделей. Дана оценка изменения напряженного состояния каркаса ребристо-кольцевого купола с уменьшением количества колонн. Отмечены значительные изменения напряженного состояния опорного кольца.</p></trans-abstract><kwd-group xml:lang="en"><kwd>ribbed-ring dome</kwd><kwd>meridional ribs</kwd><kwd>upper ring</kwd><kwd>support ring</kwd><kwd>columns</kwd><kwd>computer model</kwd><kwd>statical calculation</kwd><kwd>stress state</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>ребристо-кольцевой купол</kwd><kwd>меридиональные ребра</kwd><kwd>верхнее кольцо</kwd><kwd>опорное кольцо</kwd><kwd>колонны</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. 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