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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">10.33979/2073-7416-2024-114-4-14-27</article-id><article-id custom-type="elpub" pub-id-type="custom">construction-771</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>Определение уровневого расстояния между трещинами в железобетонных конструкциях</article-title><trans-title-group xml:lang="en"><trans-title>Definition level distance between cracks in reinforced concrete structures</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>В. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Kolchunov</surname><given-names>V. Iv.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Колчунов Владимир Иванович, член-корреспондент РААСН, доктор технических наук, профессор, профессор кафедры инженерной графики и компьютерного моделирования; главный научный сотрудник</p><p>Москва</p></bio><bio xml:lang="en"><p>Kolchunov Vladimir Iv., Corresponding Member of the Russian Academy of Architecture and Construction Sciences, doctor of technical sciences, professor, professor of the Department of Engineering Graphics and Computer Modeling; chief researcher</p><p>Moscow</p></bio><email xlink:type="simple">vlik52@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Федоров</surname><given-names>С. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Fedorov</surname><given-names>S. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Федоров Сергей Сергеевич, кандидат технических наук, доцент, зав. кафедрой инженерной графики и компьютерного моделирования</p><p>Москва</p></bio><bio xml:lang="en"><p>Fedorov Sergey S., candidate of technical sciences, head of the Department of Engineering Graphics and Computer Modeling</p><p>Moscow</p></bio><email xlink:type="simple">fedorovss@mgsu.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Национальный исследовательский Московский государственный строительный университет (НИУ МГСУ); Федеральное государственное бюджетное учреждение «Научно-исследовательский институт строительной физики Российской академии архитектуры и строительных наук»</institution></aff><aff xml:lang="en"><institution>Moscow State University of Civil Engineering (NRU MGSU); Federal State Budgetary Institution "Research Institute of Construction Physics of the Russian Academy of Architecture and Construction Sciences"</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Национальный исследовательский Московский государственный строительный университет (НИУ МГСУ)</institution></aff><aff xml:lang="en"><institution>Moscow State University of Civil Engineering (NRU MGSU)</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>31</day><month>08</month><year>2024</year></pub-date><volume>0</volume><issue>4</issue><fpage>14</fpage><lpage>27</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Колчунов В.И., Федоров С.С., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Колчунов В.И., Федоров С.С.</copyright-holder><copyright-holder xml:lang="en">Kolchunov V.I., Fedorov S.S.</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/771">https://construction.elpub.ru/jour/article/view/771</self-uri><abstract><p>Приведена расчетная модель для определения уровневого расстояния между трещинами в железобетонных конструкциях. Модель построена на обобщении известной в теории трещин в железобетоне гипотезы Томаса Ф.Г. и ее обобщении Вл.И. Колчуновым применительно к усовершенствованной теории деформирования железобетона с трещинами. Суть предложенного обобщения состоит в том, что напряженное состояние в бетоне и арматуре в окрестности трещины и на участке между трещинами определяется с учетом деформационного эффекта, заключающегося в том, что при хрупком разрушении растянутой бетонной матрицы деформация берегов трещины сдерживаются реакцией арматурного стержня, а профиль трещины нелинейно искривляется. В результате относительные взаимные смещения бетона и арматуры и уровневое расстояние между трещинами определяются интегрированием эпюр распределения деформаций бетона и арматуры на различных участках в блоке двумя смежными трещинами. С использованием полученных аналитических зависимостей для расчета уровневого расстояния между трещинами поведены численные исследования по определению расстояния между трещинами и ширины раскрытия трещин. Полученные результаты сопоставлены с имеющимися результатами испытаний железобетонных конструкций, а также с результатами расчета по методикам российских и зарубежных норм. Показано, что расчетные зависимости предлагаемой модели полностью отражают полученную экспериментально качественную картину многоуровневого процесса образования трещин, когда при дискретном уменьшение расстояния между трещинами обратно пропорциональном изменению изгибающих моментов происходит увеличение ширины раскрытия трещин.</p></abstract><trans-abstract xml:lang="en"><p>A calculation model for determining level distance between cracks in reinforced concrete structures. The model is based on the generalization of the known in the F.G. Thomas hypothesis known in the theory of cracks in reinforced concrete and its generalization by V.I. Kolchunov in relation to the improved theory of deformation of reinforced concrete with cracks. The essence of the proposed generalization is that the stress state in concrete and reinforcement in the vicinity of the crack and in the area between the cracks is determined taking into account the deformation effect, which consists in the fact that at brittle fracture of the stretched concrete matrix the deformation of the crack banks is restrained by the reaction of the reinforcement bar, and the crack profile is nonlinearly curved. As a result, the relative mutual displacements of concrete and reinforcement and the level distance between cracks are determined by integrating the distribution diagrams of concrete and reinforcement strains at different locations in the block by two adjacent cracks.</p><p>Using the obtained analytical relationships for the calculation of the level distance between cracks, numerical investigations are carried out to determine the distance between cracks and the crack opening width. The obtained results are compared with the available test results of reinforced concrete structures, as well as with the results of calculation according to the methods of Russian and foreign standards. It is shown that the calculation dependences of the proposed model fully reflect the qualitative picture of the multilevel crack formation process obtained experimentally, when at discrete decrease of the crack spacing inversely proportional to the change of bending moments there is an increase in the crack opening width.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>железобетон</kwd><kwd>уровневое расстояние между трещинами</kwd><kwd>деформации</kwd><kwd>раскрытие трещин</kwd><kwd>депланация</kwd><kwd>деформационный эффект</kwd></kwd-group><kwd-group xml:lang="en"><kwd>reinforced concrete</kwd><kwd>level distance between cracks</kwd><kwd>deformations</kwd><kwd>crack opening</kwd><kwd>deplanation</kwd><kwd>deformation effect</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">ACI Committee 318. Building Code Requirements for Structural Concrete and Commentary. 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