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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">10.22227/2949-1622.2026.3.24-43</article-id><article-id custom-type="elpub" pub-id-type="custom">concconc-100</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>Численное моделирование фрагментов плитных железобетонных конструкций в нелинейной постановке</article-title><trans-title-group xml:lang="en"><trans-title>Numerical Modeling of Reinforced Concrete Slab Fragments in a Nonlinear Formulation</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6701-2511</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Пекин</surname><given-names>Д. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Pekin</surname><given-names>D. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Дмитрий Анатольевич Пекин, кандидат технических наук, главный конструктор</p><p>142105, Московская область, г. Подольск, ул. Пионерская, д. 6-30</p><p>Scopus: 57209306984</p></bio><bio xml:lang="en"><p>Dmitrii A. Pekin, Candidate of Technical Sciences, Chief Structural Engineer</p><p>6-30 Pionerskaya st., Podolsk, 142105</p><p>Scopus: 57209306984</p></bio><email xlink:type="simple">dpekin@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ООО "ИНВ-Строй"</institution><country>Россия</country></aff><aff xml:lang="en"><institution>"INV-Stroy" LLC</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>24</fpage><lpage>43</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Пекин Д.А., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Пекин Д.А.</copyright-holder><copyright-holder xml:lang="en">Pekin D.A.</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/100">https://www.g-b-k.ru/jour/article/view/100</self-uri><abstract><p>Выполнен краткий обзор зарубежных и отечественных теорий или критериев прочности бетона, современных авторских и ©тяжелыхª программно-вычислительных комплексов (ПВК) для решения задач железобетона в объемной нелинейной постановке. Перечислены критерии прочности бетона, которые в них используются. Подробно рассмотрена теория пластического течения бетона Menetrey-Willam с учетом возможности нелинейного упрочнения при сжатии, линейного и нелинейного разупрочнения при растяжении и дилатации (УРД). Проведено численное моделирование трех разных фрагментов плитных железобетонных конструкций с помощью метода конечных элементов (МКЭ) в ПВК ANSYS 2024 R2с варьированием: размеров КЭ, критериев прочности, способа армирования и параметров УРД, площади арматуры. Подробно описаны результаты расчетов плит с указанием количественных и качественных характеристик расчетных моделей. Предлагаются пути совершенствования МКЭ для расчета плитных ЖБК.</p></abstract><trans-abstract xml:lang="en"><p>A brief review of foreign and domestic theories or criteria for concrete strength, modern proprietary and “heavy” software and computing systems for solving reinforced concrete problems in a 3D solid nonlinear formulation is provided. The concrete strength criteria used in these systems are listed. The Menetrey-Willam plastic flow theory of concrete is examined in detail, taking into account the possibility of nonlinear hardening under compression and linear and nonlinear softening under tension and dilation (HSD).</p><p>Numerical modeling of three different fragments of slab reinforced concrete structures was carried out using the finite element method (FEM) in the ANSYS 2024 R2 software package with variations in the following: FE dimensions, strength criteria, reinforcement method and HSD parameters, and reinforcement area. The results of slab calculations are described in detail, with quantitative and qualitative characteristics of the calculation models indicated. Ways to improve the FEM for calculating slab reinforced concrete structures are proposed.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>численное моделирование</kwd><kwd>теории прочности бетона</kwd><kwd>железобетонные плиты</kwd><kwd>критерий разрушения</kwd><kwd>нелинейный анализ</kwd></kwd-group><kwd-group xml:lang="en"><kwd>numerical modeling</kwd><kwd>concrete strength theory</kwd><kwd>reinforced concrete slabs</kwd><kwd>failure criterion</kwd><kwd>nonlinear analysis</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Гениев Г.А., Киссюк В.Н., Тюпин Г.А. Теория пластичности бетона и железобетона. М. : Стройиздат, 1978. 316 с.</mixed-citation><mixed-citation xml:lang="en">Geniev G.A., Kissyuk V.N., Tyupin G.A. Theory of plasticity of concrete and reinforced concrete. Moscow, Stroyizdat, 1978; 316. 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