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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">concconc</journal-id><journal-title-group><journal-title xml:lang="ru">Железобетонные конструкции</journal-title><trans-title-group xml:lang="en"><trans-title>Reinforced concrete structures</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2949-1622</issn><issn pub-type="epub">2949-1614</issn><publisher><publisher-name>Национальный исследовательский Московский государственный строительный университет</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.22227/2949-1622.2026.3.15-23</article-id><article-id custom-type="elpub" pub-id-type="custom">concconc-99</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>ТЕОРИЯ БЕТОНА И ЖЕЛЕЗОБЕТОНА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>THEORY OF CONCRETE AND REINFORCED CONCRETE</subject></subj-group></article-categories><title-group><article-title>Критерии особого предельного состояния ригелей железобетонных каркасов</article-title><trans-title-group xml:lang="en"><trans-title>Criteria for the Special Limit State of Beams in Reinforced Concrete Frames</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5290-3429</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Колчунов</surname><given-names>В. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Kolchunov</surname><given-names>V. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Виталий Иванович Колчунов, академик РААСН, профессор, доктор технических наук, профессор кафедры железобетонных и каменных конструкций</p><p>129337, г. Москва, Ярославское шоссе, д. 26</p><p>Scopus: 55534147800, ResearcherID: J-9152-2013</p></bio><bio xml:lang="en"><p>Vitaly I. Kolchunov, Full Member of RAACS, Professor, Doctor of Technical Sciences, Professor of the Department of Reinforced Concrete and Masonry Structures</p><p>26 Yaroslavskoe shosse, Moscow, 129337</p><p>Scopus: 55534147800, ResearcerID: J-9152-2013</p></bio><email xlink:type="simple">asiorel@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5392-9150</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Федорова</surname><given-names>Н. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Fedorova</surname><given-names>N. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Наталия Витальевна Федорова, доктор технических наук, профессор, заведующий кафедрой архитектурно-строительного проектирования, директор филиала НИУ МГСУ в г. Мытищи</p><p> 129337, г. Москва, Ярославское шоссе, д. 26</p><p>Scopus: 57196437054, ResearcherID: О-8119-2015</p></bio><bio xml:lang="en"><p>Natalia V. Fedorova, Doctor of Technical Sciences, Professor, Head of the Department of Architectural and Construction Design, Director of the branch of Moscow State University of Civil Engineering (National Research University) (MGSU) in Mytishchi</p><p>26 Yaroslavskoe shosse, Moscow, 129337</p><p>Scopus: 57196437054, ResearcherID: О-8119-2015</p></bio><email xlink:type="simple">fedorovanv@mgsu.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6697-3388</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Савин</surname><given-names>С. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Savin</surname><given-names>S. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Сергей Юрьевич Савин, кандидат технических наук, доцент, доцент кафедры железобетонных и каменных конструкций</p><p>129337, г. Москва, Ярославское шоссе, д. 26</p><p>Scopus: 57052453700, ResearcherID: M-8375-2016</p></bio><bio xml:lang="en"><p>Sergei Yu. Savin, Candidate of Technical Sciences, Associate Professor, Associate Professor of the Department of Reinforced Concrete and Masonry Structures</p><p>26 Yaroslavskoe shosse, Moscow, 129337</p><p>Scopus: 57052453700, ResearcherID: M-8375-2016</p></bio><email xlink:type="simple">suwin@yandex.ru</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>2026</year></pub-date><pub-date pub-type="epub"><day>28</day><month>08</month><year>2026</year></pub-date><volume>15</volume><issue>3</issue><fpage>15</fpage><lpage>23</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Колчунов В.И., Федорова Н.В., Савин С.Ю., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Колчунов В.И., Федорова Н.В., Савин С.Ю.</copyright-holder><copyright-holder xml:lang="en">Kolchunov V.I., Fedorova N.V., Savin S.Y.</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.g-b-k.ru/jour/article/view/99">https://www.g-b-k.ru/jour/article/view/99</self-uri><abstract><p>Рассматриваются характерные фрагменты железобетонных каркасов зданий в зоне возможного локального разрушения. Для оценки их сопротивления в запредельных состояниях предложена аналитическая расчетная модель. В качестве основы для валидации рассмотренной расчетной модели сопротивления приняты результаты 22 испытаний характерных фрагментов монолитных и сборных каркасов зданий, представленные в работах различных исследователей. С использованием предложенной аналитической модели выполнено параметрическое исследование влияния на сопротивление в запредельных состояниях следующих факторов: отношение высоты поперечного сечения ригелей к пролету, отношение рабочей высоты сечения к полной высоте.</p></abstract><trans-abstract xml:lang="en"><p>Substructures of reinforced concrete building frames in a zone of potential local collapse are considered. To assess their resistance in special limit states, an analytical calculation model is proposed. The validation of the presented computational resistance model is based on the results of 22 tests of typical substructures of monolithic and precast building frames, as reported in the works of various researchers. Using the proposed analytical model, a parametric study was performed on the influence of the following factors on the resistance in special limit states: the ratio of the beam cross-sectional height to the span, and the ratio of the effective section depth to the total depth.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>железобетонный каркас</kwd><kwd>ригель</kwd><kwd>критерии особого предельного состояния</kwd><kwd>непропорциональное обрушение</kwd><kwd>параметры конструирования</kwd></kwd-group><kwd-group xml:lang="en"><kwd>reinforced concrete frame</kwd><kwd>beam</kwd><kwd>special limit state criteria</kwd><kwd>disproportionate collapse</kwd><kwd>design parameters</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследование выполнено при поддержке гранта Российского научного фонда № 24-49-10010, URL: https://rscf.ru//project/24-49-10010/</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">Колчунов В.И., Ильющенко Т.А., Федорова Н.В., Савин С.Ю., Тур В.В., Лизогуб А.А. 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