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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">construction</journal-id><journal-title-group><journal-title xml:lang="ru">Строительство и реконструкция</journal-title><trans-title-group xml:lang="en"><trans-title>Building and Reconstruction</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2073-7416</issn><publisher><publisher-name>Орловский государственный университет имени И.С. Тургенева</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.33979/2073-7416-2022-100-2-3-12</article-id><article-id custom-type="elpub" pub-id-type="custom">construction-458</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 ИНЖЕНЕРНЫХ СООРУЖЕНИЙ. СТРОИТЕЛЬНЫЕ КОНСТРУКЦИИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>THEORY OF ENGINEERING STRUCTURES. BUILDING UNITS</subject></subj-group></article-categories><title-group><article-title>Гипотезы о депланации сечения от деформаций сдвига в железобетонных конструкциях, испытывающих кручение с изгибом</article-title><trans-title-group xml:lang="en"><trans-title>Deplanation hypotheses for angulardeformations in reinforced concrete structures under combined torsion and bending</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Колчунов</surname><given-names>Вл. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Kolchunov</surname><given-names>Vl. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Колчунов Владимир Иванович – член-корреспондент РААСН, доктор технических наук, профессор кафедры уникальных зданий и сооружений</p><p>г. Курск</p></bio><bio xml:lang="en"><p>Kolchunov Vladimir Iv. – сorresponding member of the Russian Academy of Architecture and Construction Sciences </p></bio><email xlink:type="simple">vlik52@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБОУ ВО «Юго-Западный государственный университет»</institution></aff><aff xml:lang="en"><institution>Southwestern state university</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>03</day><month>06</month><year>2022</year></pub-date><volume>0</volume><issue>2</issue><fpage>3</fpage><lpage>12</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Колчунов В.И., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Колчунов В.И.</copyright-holder><copyright-holder xml:lang="en">Kolchunov V.I.</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://construction.elpub.ru/jour/article/view/458">https://construction.elpub.ru/jour/article/view/458</self-uri><abstract><p>В статье проведен анализ гипотез о депланации угловых деформаций в железобетонных конструкциях при изгибе с кручением. Рассмотрен простой способ из семейства метод сеток для аппроксимации деформаций сложных функций при рассматриваемом сложном напряженном состоянии. Построены и проанализированы эпюры угловых и линейных деформаций в таких конструкции для нахождения этих деформаций, изгибающих и крутящих моментов воспринимаемых бетоном сжатой области с использованием принятых гипотез и коэффициентов для проецирования нормальных и касательных напряжений (деформаций) посредством диаграмм сжатого бетона и рабочей арматуры. Аппроксимацией расчетного сечения малыми квадратами построена пространственная поверхность деформаций, с соответствующими градиентами этих деформаций в сечении с трещиной и на этой основе записаны выражения для суммарных продольных деформаций и деформаций сдвига в сечении элемента при изгибе с кручением. С использованием мембранной аналогии функций напряжений Тимошенко-Гудьера и предложенного варианта новых сложных функций из семейства метода сеток проведен анализ погрешности нахождении значения сложных функций в рассмотренных характерных точках (2%) и в любых точках поперечного сечения (7%).Использование предложенных гипотез и приведенного варианта сложных функций позволяет учитывать депланацию сложнонапряженного сечения железобетонного элемента с трещинами, испытывающего изгиб с кручением.</p></abstract><trans-abstract xml:lang="en"><p>The article analyzes the hypothesis of deplanation of angular deformations in reinforced concrete structures during bending with torsion. A simple method from the field of the grid methods for approximating the deformations of complex functions under the 3D stress state is considered. Diagrams of angular and linear deformations in such structures were built and analyzed to find these deformations, bending and torques perceived by the concrete of the compressed area using the accepted hypotheses and coefficients for projecting normal and shear stresses (strains) through diagrams of compressed concrete and working reinforcement. Approximating the calculated section by small squares, a spatial surface of deformations was constructed. This is with the corresponding gradients of these deformations in the section with a crack, and on this basis, expressions were written for the total longitudinal deformations in the section and shear deformations in the section of the element during bending with torsion. Using the membrane analogy of the Timoshenko-Goodyear stress functions and the proposed version of new complex functions from the field of the grid method, an analysis was made of its error, when we find the value of complex functions at the considered characteristic points (2%) and at any points of the cross section (7%).The use of the proposed hypotheses and the given version of complex functions makes it possible considering the warping of the 3D stressed section of a reinforced concrete element with cracks undergoing bending with torsion.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>билинейная поверхность</kwd><kwd>опасная пространственная трещина</kwd><kwd>деформационный эффект железобетона</kwd><kwd>депланация</kwd><kwd>градиент</kwd><kwd>векторы</kwd><kwd>фибры</kwd><kwd>форма эпюры</kwd></kwd-group><kwd-group xml:lang="en"><kwd>bilinear surface</kwd><kwd>dangerous spatial crack</kwd><kwd>deformation effect of reinforced concrete</kwd><kwd>deplanation</kwd><kwd>delta jump functions</kwd><kwd>vectors</kwd><kwd>fibers</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">Бондаренко В.М., Колчунов. 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