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<article article-type="research-article" dtd-version="1.3" 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" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">mgssuvest</journal-id><journal-title-group><journal-title xml:lang="ru">Вестник МГСУ</journal-title><trans-title-group xml:lang="en"><trans-title>Vestnik MGSU</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1997-0935</issn><issn pub-type="epub">2304-6600</issn><publisher><publisher-name>Moscow State University of Civil Engineering (National Research University) (MGSU)</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.22227/1997-0935.2024.12.1920-1936</article-id><article-id custom-type="elpub" pub-id-type="custom">mgssuvest-447</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>Проектирование и конструирование строительных систем. Строительная механика. Основания и фундаменты, подземные сооружения</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Construction system design and layout planning. Construction mechanics. Bases and foundations, underground structures</subject></subj-group></article-categories><title-group><article-title>Упрощенный вариант методики расчета многослойных составных стержней по теории А.Р. Ржаницына</article-title><trans-title-group xml:lang="en"><trans-title>A simplified version of the method of calculation of multilayer composite rods according to the theory of A.R. Rzhanitsyn</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4329-4403</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Филатов</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Filatov</surname><given-names>V. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Владимир Владимирович Филатов — доктор технических наук, доцент, профессор кафедры строительной и теоретической механики</p><p>129337, г. Москва, Ярославское шоссе, д. 26</p><p>Scopus: 57194451687, ResearcherID: AAZ-8347-2021</p></bio><bio xml:lang="en"><p>Vladimir V. Filatov — Doctor of Technical Sciences, Associated Professor, Professor of the Department of Structural and Theoretical Mechanics</p><p>26 Yaroslavskoe shosse, Moscow, 129337</p><p>Scopus: 57194451687, ResearcherID: AAZ-8347-2021</p></bio><email xlink:type="simple">stroitmeh@mgsu.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Хоанг</surname><given-names>Тхи Линь Куен</given-names></name><name name-style="western" xml:lang="en"><surname>Hoang</surname><given-names>Thi Linh Quyen</given-names></name></name-alternatives><bio xml:lang="ru"><p>Тхи Линь Куен Хоанг — аспирантка кафедры строительной и теоретической механики</p><p>129337, г. Москва, Ярославское шоссе, д. 26</p></bio><bio xml:lang="en"><p>Thi Linh Quyen Hoang — postgraduate student of the Department of Structural and Theoretical Mechanics</p><p>26 Yaroslavskoe shosse, Moscow, 129337</p></bio><email xlink:type="simple">hoanglinhquyen@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Национальный исследовательский Московский государственный строительный университет (НИУ МГСУ)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Moscow State University of Civil Engineering (National Research University) (MGSU)</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>26</day><month>12</month><year>2024</year></pub-date><volume>19</volume><issue>12</issue><fpage>1920</fpage><lpage>1936</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Филатов В.В., Хоанг Т., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Филатов В.В., Хоанг Т.</copyright-holder><copyright-holder xml:lang="en">Filatov V.V., Hoang T.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.vestnikmgsu.ru/jour/article/view/447">https://www.vestnikmgsu.ru/jour/article/view/447</self-uri><abstract><sec><title>Введение</title><p>Введение. Предложена модификация теории составных стержней (ТСС) А.Р. Ржаницына. Она является одним из наиболее распространенных методов расчета многослойных строительных конструкций. Напряженно-деформированное состояние многослойных составных балок устанавливается функциями прогибов, изгибающих моментов и усилий в непрерывно распределенных межслойных связях, препятствующих взаимному сдвигу слоев. Усилия в связях сдвига определяются из решения системы n обыкновенных дифференциальных уравнений второго порядка, где n — количество межслойных швов. Предложенная методика строится на гипотезе функциональной зависимости между сдвигающими усилиями в швах балки. Данное предположение позволяет свести задачу определения функций сдвигающих усилий к решению одного обыкновенного дифференциального уравнения второго порядка. Таким образом, число совместно решаемых дифференциальных уравнений, описывающих задачу, сокращается с n + 2 до трех при любом количестве слоев.</p></sec><sec><title>Материалы и методы</title><p>Материалы и методы. Для решения системы дифференциальных уравнений как в постановке Ржаницына, так и в упрощенной постановке, привлекаются разностные уравнения метода последовательных аппроксимаций.</p></sec><sec><title>Результаты</title><p>Результаты. Получены результаты расчета шестислойной балки с использованием трех моделей: в постановке А.Р. Ржаницына, с привлечением упрощенной методики Р.Ф. Габбасова и В.В. Филатова, в постановке авторов статьи. Выполнено сравнение результатов расчета по упрощенным методикам с ТСС. Исследовано влияние различных параметров (геометрических и механических характеристик слоев, жесткости швов на сдвиг) на работу упрощенных моделей. Построены эпюры максимальных продольных и касательных напряжений для разных вариантов компоновки поперечного сечения составной балки.</p></sec><sec><title>Выводы</title><p>Выводы. Представлены рекомендации и описаны ограничения по возможностям применения предлагаемой методики расчета многослойных балок на действие статических нагрузок. Методика может быть рекомендована к использованию в практике проектных организаций и в учебном процессе профильных учебных заведений высшего образования.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Introduction</title><p>Introduction. A modification of the theory of composite rods (TCR) by A.R. Rzhanitsyn is proposed. It is one of the most common methods for calculating multilayer building structures. The stress-strain state of multilayer composite beams is determined by the functions of deflections, bending moments and forces in continuously distributed interlayer connections that prevent mutual shear of the layers. The forces in the shear connections are determined by solving a system of n ordinary differential equations of the second order, where n is the number of interlayer seams. The proposed method is based on the hypothesis of a functional relationship between the shear forces in the beam seams. This assumption allows us to reduce the problem of determining the functions of shear forces to solving one ordinary differential equation of the second order. Thus, the number of simultaneously solved differential equations describing the problem is reduced from n + 2 to three for any number of layers.</p></sec><sec><title>Materials and methods</title><p>Materials and methods. To solve the system of differential equations, both in Rzhanitsyn’s formulation and in a simplified formulation, difference equations of the method of successive approximations (MSA) are used.</p></sec><sec><title>Results</title><p>Results. The results of calculation of a six-layer beam using three models are obtained: in the formulation of A.R. Rzhanitsyn, with the involvement of the simplified method of R.F. Gabbasov and V.V. Filatov, in the formulation of the authors of the paper. The results of calculation by simplified methods with TCR are compared. The influence of various parameters (geometric and mechanical characteristics of layers, shear stiffness of seams) on the operation of simplified models is studied. Diagrams of maximum longitudinal and tangential stresses are constructed for different options for the layout of the cross section of a composite beam</p></sec><sec><title>Conclusions</title><p>Conclusions. Recommendations are presented and limitations on the possibilities of using the proposed calculation method for multilayer beams under static loads are described. The method can be recommended for use in the practice of design organizations and in the educational process of specialized higher education institutions.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>теория А.Р. Ржаницына</kwd><kwd>теория составных стержней</kwd><kwd>коэффициент жесткости шва на сдвиг</kwd><kwd>многослойные балки</kwd><kwd>метод последовательных аппроксимаций</kwd></kwd-group><kwd-group xml:lang="en"><kwd>theory of A.R. Rzhanitsyn</kwd><kwd>theory of composite rods</kwd><kwd>joint shear stiffness coefficient</kwd><kwd>multilayer beams</kwd><kwd>method of successive approximations</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследование профинансировано Министерством науки и высшего образования РФ, проект № FSWG-2023-0004.</funding-statement><funding-statement xml:lang="en">The study was funded by the Ministry of Science and Higher Education of the Russian Federation, project No. FSWG-2023-0004.</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Ржаницын А.Р. Составные стержни и пластинки. М. : Стройиздат, 1986. 314 с.</mixed-citation><mixed-citation xml:lang="en">Rzhanitsyn A.R. Composite rods and plates. Moscow, Stroyizdat, 1986; 314. 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