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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">50719</article-id><article-id pub-id-type="doi">10.22363/1815-5235-2025-22-1-28-38</article-id><article-id pub-id-type="edn">INASME</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">Concrete Damage Plasticity Parameters for the Analysis of Reinforced Concrete Structures</article-title><trans-title-group xml:lang="ru"><trans-title>Параметры модели Concrete Damage Plasticity для расчета железобетонных конструкций</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0006-9228-4574</contrib-id><contrib-id contrib-id-type="spin">1616-6935</contrib-id><name-alternatives><name xml:lang="en"><surname>Isakov</surname><given-names>Egor A.</given-names></name><name xml:lang="ru"><surname>Исаков</surname><given-names>Егор Андреевич</given-names></name></name-alternatives><bio xml:lang="en"><p>postgraduate student of the Institute of Civil Engineering of the Higher School of Hydraulic and Power Engineering</p></bio><bio xml:lang="ru"><p>аспирант инженерно-строительного института высшей школы гидротехнического и энергетического строительства</p></bio><email>isakoww3@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Peter the Great St. Petersburg Polytechnic University</institution></aff><aff><institution xml:lang="ru">Санкт-Петербургский политехнический университет Петра Великого</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2026-06-16" publication-format="electronic"><day>16</day><month>06</month><year>2026</year></pub-date><volume>22</volume><issue>1</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>28</fpage><lpage>38</lpage><history><date date-type="received" iso-8601-date="2026-06-19"><day>19</day><month>06</month><year>2026</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2026, Isakov E.A.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2026, Исаков Е.А.</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="en">Isakov E.A.</copyright-holder><copyright-holder xml:lang="ru">Исаков Е.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/50719">https://journals.rudn.ru/structural-mechanics/article/view/50719</self-uri><abstract xml:lang="en"><p>The paper presents a justification of the parameters of the Concrete Damage Plasticity (CDP) model used for numerical analysis of reinforced concrete structures. It is shown that the results of nonlinear simulations are highly sensitive to the choice of plasticity parameters and the adopted concrete stress-strain relationships. The aim of the study is to analyse the sensitivity of the key CDP parameters and to verify the applicability of the model under static loading conditions. Numerical simulations were performed using the finite element method in Abaqus. The influence of the dilation angle, yield surface parameters and energy-consistent stress-strain diagrams on stiffness and load-bearing capacity was investigated. The model was verified at both the material and structural levels. It is demonstrated that the use of physically justified parameters ensures an accurate reproduction of the nonlinear behaviour of reinforced concrete elements up to failure.</p></abstract><trans-abstract xml:lang="ru"><p>Выполнено обоснование параметров модели Concrete Damage Plasticity, применяемой при численном расчете железобетонных конструкций. Показано, что результаты моделирования существенно зависят от выбора параметров пластичности и заданных диаграмм деформирования бетона. Цель исследования - анализ чувствительности ключевых параметров модели и верификация еe применимости при статическом нагружении. Численные расчеты выполнены методом конечных элементов в программном комплексе Abaqus. Исследовано влияние угла дилатансии, параметров поверхности текучести и энергетически согласованных диаграмм деформирования на расчетную жесткость и несущую способность элементов. Проведена верификация модели на уровне материала и конструкции. Установлено, что использование обоснованных параметров обеспечивает корректное воспроизведение нелинейного поведения железобетонных элементов вплоть до стадии разрушения.</p></trans-abstract><kwd-group xml:lang="en"><kwd>concrete</kwd><kwd>numerical analysis</kwd><kwd>finite element method</kwd><kwd>plasticity</kwd><kwd>damage</kwd><kwd>dilation</kwd><kwd>deformation model</kwd><kwd>Abaqus</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>бетон</kwd><kwd>численный расчет</kwd><kwd>метод конечных элементов</kwd><kwd>пластичность</kwd><kwd>повреждение</kwd><kwd>дилатация</kwd><kwd>деформационная модель</kwd><kwd>Abaqus</kwd></kwd-group><funding-group/></article-meta><fn-group/></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Etse G., Willam K. Fracture energy formulation for inelastic behavior of plain concrete. 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