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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">inbure</journal-id><journal-title-group><journal-title xml:lang="ru">Известия вузов. Инвестиции. Строительство. Недвижимость</journal-title><trans-title-group xml:lang="en"><trans-title>Izvestiya vuzov. Investitsii. Stroitelstvo. Nedvizhimost</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2227-2917</issn><issn pub-type="epub">2500-154X</issn><publisher><publisher-name>Irkutsk National Research Technical University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.21285/2227-2917-2021-1-38-47</article-id><article-id custom-type="elpub" pub-id-type="custom">inbure-64</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>ТЕХНИЧЕСКИЕ НАУКИ. СТРОИТЕЛЬСТВО</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>TECHNICAL SCIENCES. CONSTRUCTION</subject></subj-group></article-categories><title-group><article-title>Учет физической нелинейности при расчете плоской железобетонной рамы с использованием вычислительного комплекса SCAD</article-title><trans-title-group xml:lang="en"><trans-title>Consideration of physical nonlinearity in the calculation of a flat reinforced concrete slab using the SCAD software</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0443-6405</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кущ</surname><given-names>В. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Kushch</surname><given-names>V. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кущ Вадим Александрович, магистрант</p><p>664074, г. Иркутск, ул. Лермонтова, 83</p></bio><bio xml:lang="en"><p>Vadim A. Kushch, master's degree student</p><p>83 Lermontov St., Irkutsk, 664074</p></bio><email xlink:type="simple">caxap818@yandex.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/0000-0002-3800-0570</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ященко</surname><given-names>В. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Yashchenko</surname><given-names>V. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ященко Владимир Петрович, кандидат технических наук, доцент кафедры механики и сопротивления материалов</p><p>664074, г. Иркутск, ул. Лермонтова, 83</p></bio><bio xml:lang="en"><p>Vladimir P. Yashchenko, Cand. Sci (Eng.), Associate Professor of the Department of Mechanics and Strength of Materials</p><p>83 Lermontov St., Irkutsk, 664074</p></bio><email xlink:type="simple">vp_yashenko@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Иркутский национальный исследовательский технический университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Irkutsk National Research Technical University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>08</day><month>11</month><year>2023</year></pub-date><volume>11</volume><issue>1</issue><fpage>38</fpage><lpage>47</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Кущ В.А., Ященко В.П., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Кущ В.А., Ященко В.П.</copyright-holder><copyright-holder xml:lang="en">Kushch V.A., Yashchenko V.P.</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://inbure.elpub.ru/jour/article/view/64">https://inbure.elpub.ru/jour/article/view/64</self-uri><abstract><p>Цель работы заключается в анализе результатов определения усилий и перемещений в плоской раме при статической нагрузке, полученных с учетом физически нелинейной работы железобетона. Проведено сравнение деформационных теорий, применяемых для композитных материалов. Осуществлен линейный расчет и исследованы результаты нелинейного автоматизированного расчета перемещений и усилий в раме, выполненного в программном комплексе SCAD Office (версия 21.1.9.7) с использованием различных вариантов деформационных теорий. Проведен автоматизированный расчет рамы в соответствии с рекомендациями СП 52-103-2007 «Железобетонные монолитные конструкции зданий», согласно которому нелинейную работу железобетонных элементов конструкций рекомендуется учитывать путем введения понижающих коэффициентов. Был выполнен сравнительный анализ результатов определения перемещений и усилий в плоской железобетонной раме, вследствие чего было установлено несоответствие значений величин усилий, полученных при расчетах по теориям физической нелинейности и по рекомендациям СП 52-103-2007. Максимальная погрешность, по сравнению с нелинейным расчетом по СП 52-103-2007, составляет 55,8%. При сравнении данных, полученных в расчетах, также было установлено несоответствие значений перемещений, полученных по рекомендациям СП 52-103-2007. Наибольшее расхождение с результатами нелинейного расчета составляет 49,4%, а с результатами линейного расчета – 69%. Таким образом, проведенное исследование выявило несогласованность результатов, полученных с использованием нормативных рекомендаций, и результатов линейного и нелинейного расчета. Разнонаправленность результатов требует дополнительных верификационных проверок при использовании нелинейного анализа в расчетах на прочность и жесткость как средства уточнения напряженно-деформированного состояния конструкции.</p></abstract><trans-abstract xml:lang="en"><p>The aim of the paper is to analyze the results of the determination of forces and motions in a flat slab under static load, obtained considering the physically nonlinear operation of reinforced concrete. The deformation theories used for composite materials were compared. A linear analysis was carried out, along with a nonlinear automated analysis of forces and motions in a slab in the SCAD Office software (version 21.1.9.7) based on various deformation theories. An automatic calc ulation of a slab was conducted in accordance with the guidelines of the SP 52 -103-2007 “Concrete monolithic building structures”, according to which the nonlinear operation of reinforced concrete structural elements should be considered by introducing reducing coefficients. A comparative analysis of the obtained forces and motions in a flat reinforced concrete slab was carried out. An inconsistency was found between the values calculated based on the theory of physical nonlinearity and </p><p>those calculated according to the recommendations of SP 52-103-2007. In comparison with the nonlinear analysis based on SP 52-103-2007, the maximum error comprised 55.8%. The obtained values of motions, according to the recommendations of SP 52-103-2007, were also inconsistent. The largest discrepancy in the results of the nonlinear analysis was 49.4%, while the largest discrepancy in the linear analysis was 69%. Thus, the study showed inconsistency between the results obtained using the guidelines and the results of linear and non-linear analysis. The difference in the results demands additional verification when using non-linear analysis in calculations for strength and stiffness as a means of clarifying the stress-strain state of the studied structure.</p><p> </p></trans-abstract><kwd-group xml:lang="ru"><kwd>нелинейный анализ</kwd><kwd>упругопластический материал</kwd><kwd>критерии прочности</kwd><kwd>теории пластичности</kwd><kwd>SCAD Office</kwd></kwd-group><kwd-group xml:lang="en"><kwd>nonlinear analysis</kwd><kwd>elastic-plastic material</kwd><kwd>strength criteria</kwd><kwd>plasticity theories</kwd><kwd>SCAD Office</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">Евсеев Н.А. Учет физической нелинейности железобетонных конструкций при численных расчетах конструктивных систем // Вестник гражданских инженеров. 2017. № 5 (64). 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