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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">32024</article-id><article-id pub-id-type="doi">10.22363/1815-5235-2022-18-3-242-254</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">Comparative study of finite element methods of calculation of ribbed reinforced concrete floors</article-title><trans-title-group xml:lang="ru"><trans-title>Сравнительное исследование конечно-элементных методик расчета ребристых железобетонных перекрытий</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8003-4299</contrib-id><name-alternatives><name xml:lang="en"><surname>Nikitin</surname><given-names>Konstantin E.</given-names></name><name xml:lang="ru"><surname>Никитин</surname><given-names>Константин Евгеньевич</given-names></name></name-alternatives><bio xml:lang="en"><p>Candidate of Technical Sciences, Docent of the Department of Civil Engineering, Academy of Engineering</p></bio><bio xml:lang="ru"><p>кандидат технических наук, доцент департамента строительства, Инженерная академия</p></bio><email>niksbox@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9595-4426</contrib-id><name-alternatives><name xml:lang="en"><surname>Kirsanov</surname><given-names>Oleg A.</given-names></name><name xml:lang="ru"><surname>Кирсанов</surname><given-names>Олег Андреевич</given-names></name></name-alternatives><bio xml:lang="en"><p>master’s degree student, Department of Civil Engineering, Academy of Engineering</p></bio><bio xml:lang="ru"><p>студент магистратуры, департамент строительства, Инженерная академия</p></bio><email>kirsanov.o.a@yandex.ru</email><xref ref-type="aff" rid="aff1"/></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><pub-date date-type="pub" iso-8601-date="2022-09-28" publication-format="electronic"><day>28</day><month>09</month><year>2022</year></pub-date><volume>18</volume><issue>3</issue><issue-title xml:lang="en">VOL 18, NO3 (2022)</issue-title><issue-title xml:lang="ru">ТОМ 18, №3 (2022)</issue-title><fpage>242</fpage><lpage>254</lpage><history><date date-type="received" iso-8601-date="2022-09-28"><day>28</day><month>09</month><year>2022</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2022, Nikitin K.E., Kirsanov O.A.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2022, Никитин К.Е., Кирсанов О.А.</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="en">Nikitin K.E., Kirsanov O.A.</copyright-holder><copyright-holder xml:lang="ru">Никитин К.Е., Кирсанов О.А.</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/32024">https://journals.rudn.ru/structural-mechanics/article/view/32024</self-uri><abstract xml:lang="en"><p style="text-align: justify;">The paper presents the results of a comparative study of several finite element models of ribbed reinforced concrete solid floors. Using the example of a solid slab with infrequent ribs arranged along a grid of columns, three models frequently used in computational practice are analyzed. Those models include both rods and thin-walled elements. In the first model, the plate and its ribs are considered separately, within the framework of the decomposition scheme of the structure. The second model contains plate finite elements and the rod finite elements of the ribs connected to each other. The third model consists entirely of thin-walled finite elements that model both the plate and the floor ribs. The ribbed floor is also considered in the formulation of the problem within the framework of the theory of elasticity. The floor is represented in the form of rigidly connected solid bodies of ribs and plates. Reinforcement rods inside the concrete massive are included in the model as separate solid bodies. This model serves as a benchmark for assessing the accuracy of the obtained results. Its calculation is performed in the FEM application Ansys. The paper compares the results of calculations performed using various models. A conclusion is made about the accuracy of the obtained results. A significant difference between the proposed work and similar studies devoted to the selection of the best design schemes of ribbed slab of floor is the consideration of the influence of reinforcement on the behavior of the structure.</p></abstract><trans-abstract xml:lang="ru"><p style="text-align: justify;">Приведены результаты сравнительного исследования нескольких конечно-элементных моделей ребристых монолитных железобетонных перекрытий. На примере монолитного перекрытия с редко проходящими ребрами, расположенными по сетке колонн, анализируются три часто используемые в расчетной практике модели, включающие в себя стержни и тонкостенные элементы. В первой модели плита и ребра рассматриваются по-отдельности, в рамках поэтажной схемы конструкции. Вторая модель содержит связанные друг с другом конечные элементы плиты и стержневые элементы ребер. Третья модель состоит целиком из тонкостенных конечных элементов, моделирующих как плиту, так и ребра перекрытия. Также рассматривается модель перекрытия в постановке задачи в рамках теории упругости. Перекрытие представляется в виде жестко связанных друг с другом массивных тел ребер и плиты. Стержни арматуры внутри бетонного массива включаются в состав модели в виде отдельных объемных тел. Данная модель служит своеобразным эталоном для оценки точности получаемых результатов. Ее расчет выполняется в конечно-элементном комплексе Ansys. Осуществляется сравнение результатов расчетов, выполненных по различным расчетным моделям. Делается заключение о точности получаемых результатов. Существенным отличием предлагаемой работы от аналогичных исследований, посвященных выбору расчетных схем ребристых перекрытий, является учет влияния армирования на работу конструкции.</p></trans-abstract><kwd-group xml:lang="en"><kwd>reinforced concrete structures</kwd><kwd>ribbed floor</kwd><kwd>ribbed slab</kwd><kwd>finite element method</kwd><kwd>design models</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>железобетонные конструкции</kwd><kwd>ребристое перекрытие</kwd><kwd>метод конечных элементов</kwd><kwd>расчетные схемы</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">Gorodetsky A.S., Evzerov I.D. Computer models of structures. Kiev: Fakt Publ.; 2005. (In Russ.)</mixed-citation><mixed-citation xml:lang="ru">Городецкий А.С., Евзеров И.Д. Компьютерные модели конструкций. 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