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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">vestnikcstroy</journal-id><journal-title-group><journal-title xml:lang="ru">Вестник НИЦ «Строительство»</journal-title><trans-title-group xml:lang="en"><trans-title>Bulletin of Science and Research Center of Construction</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2224-9494</issn><issn pub-type="epub">2782-3938</issn><publisher><publisher-name>АО «НИЦ «Строительство»</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.37538/2224-9494-2025-3(46)-62-74</article-id><article-id custom-type="edn" pub-id-type="custom">IYVTTR</article-id><article-id custom-type="elpub" pub-id-type="custom">vestnikcstroy-554</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>СТРОИТЕЛЬНЫЕ КОНСТРУКЦИИ, ЗДАНИЯ И СООРУЖЕНИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>BUILDING CONSTRUCTIONS, BUILDINGS AND STRUCTURES</subject></subj-group></article-categories><title-group><article-title>Определение критического значения частоты собственных колебаний и модуля деформации железобетонных строительных конструкций для динамического мониторинга</article-title><trans-title-group xml:lang="en"><trans-title>Calculating the critical value of the natural frequency and deformation modulus of reinforced concrete structures for dynamic monitoring</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>Коротков</surname><given-names>В. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Korotkov</surname><given-names>V. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Владимир Анатольевич Коротков, канд. техн. наук, ведущий научный сотрудник отдела надежности строительных конструкций, ФБУ «НТЦ ЯРБ», Москва</p><p>ул. Малая Красносельская, д. 2/8, к. 5, г. Москва, 107140, Российская Федерация</p><p>e-mail: korotkov@secnrs.ru </p></bio><bio xml:lang="en"><p>Vladimir A. Korotkov, Cand. Sci. (Engineering), Leading Researcher of the Construction Reliability Division, Scientific and Engineering Centre for Nuclear and Radiation Safety, Moscow</p><p>Malaya Krasnoselskaya str., 2/8, bld. 5, Moscow, 107140, Russian Federation</p><p>e-mail: korotkov@secnrs.ru </p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Родин</surname><given-names>П. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Rodin</surname><given-names>P. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Павел Александрович Родин*, научный сотрудник отдела надежности строительных конструкций, ФБУ «НТЦ ЯРБ», Москва</p><p>ул. Малая Красносельская, д. 2/8, к. 5, г. Москва, 107140, Российская Федерация</p><p>e-mail: prodin@secnrs.ru </p></bio><bio xml:lang="en"><p>Pavel A. Rodin*, Researcher of the Construction Reliability Division, Scientific and Engineering Centre for Nuclear and Radiation Safety, Moscow</p><p>Malaya Krasnoselskaya str., 2/8, bld. 5, Moscow, 107140, Russian Federation</p><p>e-mail: prodin@secnrs.ru </p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Федеральное бюджетное учреждение «Научно-технический центр по ядерной и радиационной безопасности» (ФБУ «НТЦ ЯРБ)»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Scientific and Engineering Centre for Nuclear and Radiation Safety (SEC NRS)</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>22</day><month>09</month><year>2025</year></pub-date><volume>46</volume><issue>3</issue><fpage>62</fpage><lpage>74</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Коротков В.А., Родин П.А., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Коротков В.А., Родин П.А.</copyright-holder><copyright-holder xml:lang="en">Korotkov V.A., Rodin P.A.</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.cstroy.ru/jour/article/view/554">https://vestnik.cstroy.ru/jour/article/view/554</self-uri><abstract><sec><title>Введение</title><p>Введение. Статья является продолжением работ по учету в анализе с помощью вибродиагностики динамических характеристик строительных конструкций зданий, содержащих трещины в бетоне. Разработанные ранее авторами методики позволили сделать оценку ослабления жесткости и уменьшения частоты собственных колебаний в элементах строительных конструкций, а далее определить критическое значение частоты и соответствующего модуля деформации, по достижении которых дальнейшая эксплуатация здания невозможна. Дано описание оригинального подхода определения критического значения частоты собственных колебаний и соответствующего модуля деформации бетона.</p></sec><sec><title>Цель</title><p>Цель. Определение критической частоты собственных колебаний фрагмента здания (перекрытие/стена), по достижении которой дальнейшая эксплуатация здания невозможна.</p></sec><sec><title>Материалы и методы</title><p>Материалы и методы. На конкретных примерах получены значения критической частоты собственных колебаний и соответствующее значение модуля деформации перекрытия и стены. Рассмотрено влияние комбинированных граничных условий (сочетание шарнирных опор и жесткой заделки) на частоты собственных колебаний различных строительных конструкций.</p></sec><sec><title>Результаты</title><p>Результаты. Полученные результаты расчетов с учетом вибродиагностики для перекрытия характеризуются запасом прочности и несущей способности, а для стены прочность обеспечена, но запас по несущей способности незначительный.</p></sec><sec><title>Выводы</title><p>Выводы. Преимуществом предлагаемого подхода, по сравнению с изложенным в методике МЧС, является расчет критического значения частоты собственных колебаний и модуля деформации бетона строительных конструкций зданий.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Introduction</title><p>Introduction. This ongoing study considers the dynamic characteristics of building structures with cracks in concrete when monitoring using vibration diagnostics. Previously developed methods provided an assessment of the reduction in stiffness and natural frequency in structural elements. Critical values of frequency and corresponding deformation modulus were then determined; when reached, further operation of the building would be impossible. An original approach to determining the critical value of the natural frequency and the corresponding deformation modulus of concrete is described.</p></sec><sec><title>Aim</title><p>Aim. To determine the critical natural frequency of a building section (floor/wall), beyond which the building can no longer be exploited.</p></sec><sec><title>Materials and methods</title><p>Materials and methods. Values of the critical natural frequency and the corresponding value of the deformation modulus of the slab and wall were obtained using examples. The impact of combined boundary conditions, i.e., the combination of hinged supports and rigid fixing, on the natural frequencies of various building structures is examined.</p></sec><sec><title>Results</title><p>Results. The obtained calculation results, with regard to vibration diagnostics, indicate a margin of strength and load-bearing capacity for the slab, while the wall has sufficient strength, albeit with an insignificant margin of load-bearing capacity.</p></sec><sec><title>Conclusions</title><p>Conclusions. Compared to the approach outlined in the EMERCOM methodology, the proposed method is advantageous in calculating the critical value of the natural frequency and the deformation modulus of concrete in building structures.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>вибродиагностика</kwd><kwd>частота собственных колебаний</kwd><kwd>модальный метод</kwd><kwd>модуль деформации бетона</kwd><kwd>модуль деформации стальной арматуры</kwd><kwd>динамический мониторинг</kwd><kwd>жесткое защемление</kwd><kwd>шарнирное опирание</kwd><kwd>комбинированные граничные условия</kwd></kwd-group><kwd-group xml:lang="en"><kwd>vibration diagnostics</kwd><kwd>natural frequency</kwd><kwd>modal method</kwd><kwd>concrete deformation modulus</kwd><kwd>steel reinforcement deformation modulus</kwd><kwd>dynamic monitoring</kwd><kwd>rigid fixing</kwd><kwd>hinged support</kwd><kwd>combined boundary conditions</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">ГОСТ 27751-2014. 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