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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">vdgtu</journal-id><journal-title-group><journal-title xml:lang="ru">Вестник Дагестанского государственного технического университета. Технические науки</journal-title><trans-title-group xml:lang="en"><trans-title>Herald of Dagestan State Technical University. Technical Sciences</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2073-6185</issn><issn pub-type="epub">2542-095X</issn><publisher><publisher-name>Daghestan State Technical University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.21822/2073-6185-2019-46-4-143-154</article-id><article-id custom-type="elpub" pub-id-type="custom">vdgtu-722</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>СТРОИТЕЛЬСТВО И АРХИТЕКТУРА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>BUILDING AND ARCHITECTURE</subject></subj-group></article-categories><title-group><article-title>ИССЛЕДОВАНИЕ ВЛИЯНИЯ ТРЕЩИН НА НЕСУЩУЮ СПОСОБНОСТЬ ЖЕЛЕЗОБЕТОННЫХ ПЛИТ С ПОМОЩЬЮ ВЫЧИСЛИТЕЛЬНОГО КОМПЛЕКСА ПРИНС</article-title><trans-title-group xml:lang="en"><trans-title>STUDY OF THE INFLUENCE OF CRACKS ON THE BEARING CAPACITY OF REINFORCED CONCRETE PLATES USING THE PRINS CALCULATION COMPLEX</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>Айдемиров</surname><given-names>К. Р.</given-names></name><name name-style="western" xml:lang="en"><surname>Aydemirov</surname><given-names>K. R.</given-names></name></name-alternatives><bio xml:lang="ru"><p>кандидат технических наук, доцент кафедры сопротивления материалов, теоретической и строительной механики,</p><p>367026, г. Махачкала, пр.И.Шамиля, 70</p></bio><bio xml:lang="en"><p>Cand. Sci. (Technical), Assoc. Prof., Department of Resistance of Materials, Theoretical and Structural Mechanics,</p><p>70 Shamil Ave., Makhachkala 367026</p></bio><email xlink:type="simple">kyrayd@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>Агапов</surname><given-names>В. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Agapov</surname><given-names>V. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>доктор технических наук, профессор кафедры прикладной механики и математики,</p><p>1129337, г. Москва, Ярославское шоссе, д. 26</p></bio><bio xml:lang="en"><p>Dr. Sci., (Technical), Prof., Department of Applied Mechanics and Mathematics,</p><p>26 Yaroslavl Highway, Moscow 129337</p></bio><email xlink:type="simple">agapovpb@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Дагестанский государственный технический университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Daghestan State Technical University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Национальный исследовательский Московский государственный&#13;
строительный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>National Research Moscow State University of Civil Engineering</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2019</year></pub-date><pub-date pub-type="epub"><day>02</day><month>01</month><year>2020</year></pub-date><volume>46</volume><issue>4</issue><fpage>143</fpage><lpage>154</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Айдемиров К.Р., Агапов В.П., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Айдемиров К.Р., Агапов В.П.</copyright-holder><copyright-holder xml:lang="en">Aydemirov K.R., Agapov 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://vestnik.dgtu.ru/jour/article/view/722">https://vestnik.dgtu.ru/jour/article/view/722</self-uri><abstract><sec><title>Цель</title><p>Цель. В статье рассмотрена конечно-элементная методика определения несущей способности железобетонных плит с дефектами в виде трещин с целью определения остаточного запаса прочности.</p></sec><sec><title>Метод</title><p>Метод. Методика основана на использовании алгоритмов расчета конструкций с учетом физической нелинейности, реализованных в программе ПРИНС. Эти алгоритмы предполагают использование одной и той же расчетнойсхемы в процессе решения задачи. Однако специфика поставленной задачи заключается в том, что расчетные схемы исходной конструкции и конструкции с трещинами различаются.</p></sec><sec><title>Результат</title><p>Результат. С учетом этого обстоятельства алгоритмы нелинейного расчета конструкций по программе ПРИНС были дополнены опцией, позволяющей менять параметры расчетной схемы в процессе сквозного расчета. Для исследования несущей способности железобетонных плит используются многослойные конечные элементы, для каждого из которых задается определенный пакет материалов. Модернизация расчетной схемы в данном случае заключается в замене одного пакета материалов на другой. Входной файл программы ПРИНС дополняется описанием трещин с указанием мест их расположения и всех необходимых характеристик. Приводятся примеры определения несущей способности плиты с дефектами в виде трещин при различных граничных условиях.</p></sec><sec><title>Вывод</title><p>Вывод. Использование перестраиваемой расчетной схемы при сквозном расчете позволяет эффективно решать задачу по определению несущей способности железобетонных плит с дефектами в виде трещин. Это даст возможность эксплуатационным службам отслеживать изменение несущей способности зданий и сооружений, содержащих железобетонные плиты, при возникновении дефектов в виде трещин, определять работоспособность конструкций и принимать обоснованные решения в случае необходимости ремонта. </p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Objectives</title><p>Objectives. In order to determine a residual safety factor, a finite element method is considered for determining the bearing capacity of reinforced concrete plates having defects in the form of cracks.</p></sec><sec><title>Method</title><p>Method. The methodology is based on the use of structural calculation algorithms that take physical nonlinearity implemented in the PRINS programme into account. These algorithms assume the use of the same computational scheme in the process of solving the problem. However, the specificity of the task consists in considering differences between the calculation schemes of the initial structure and the structure having cracks.</p></sec><sec><title>Result</title><p>Result. With this in mind, the algorithms of nonlinear structural analysis according to the PRINS programme are supplemented with an option that allows the parameters of the design scheme to be changed in an end-to-end calculation process. Multilayer finite elements are used to study the load-bearing capacity of reinforced concrete plates, each having a specific material package. The modernisation of the design scheme in this case consists in replacing one package of materials with another. The input file of the PRINS programme is supplemented by a description of cracks with an indication of their location and all other relevant characteristics. Examples of problems arising when determining the bearing capacity of a plate with defects in the form of cracks under various boundary conditions are given.</p></sec><sec><title>Conclusion</title><p>Conclusion. The problem of determining the bearing capacity of reinforced concrete plates with defects in the form of cracks can be effectively solved using a reconfigurable design scheme for end-to-end calculation. In the event of defects appearing in the form of cracks, this will enable operational services to monitor changes in the bearing capacity of buildings and structures containing reinforced concrete plates, as well as to determine the operability of structures and make substantiated decisions in case of repair. </p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>строительные сооружения</kwd><kwd>плиты</kwd><kwd>метод конечных элементов</kwd><kwd>нелинейность</kwd><kwd>несущая способность</kwd><kwd>программное обеспечение</kwd></kwd-group><kwd-group xml:lang="en"><kwd>building structures</kwd><kwd>plates</kwd><kwd>finite element method</kwd><kwd>nonlinearity</kwd><kwd>load bearing capacity</kwd><kwd>software</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">Кумпяк О. Г.,Кокорин Д. 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