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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">concconc</journal-id><journal-title-group><journal-title xml:lang="ru">Железобетонные конструкции</journal-title><trans-title-group xml:lang="en"><trans-title>Reinforced concrete structures</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2949-1622</issn><issn pub-type="epub">2949-1614</issn><publisher><publisher-name>Национальный исследовательский Московский государственный строительный университет</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.22227/2949-1622.2026.3.44-52</article-id><article-id custom-type="elpub" pub-id-type="custom">concconc-101</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 БЕТОНА И ЖЕЛЕЗОБЕТОНА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>THEORY OF CONCRETE AND REINFORCED CONCRETE</subject></subj-group></article-categories><title-group><article-title>Проектирование и расчет усиления железобетонных конструкций зданий и сооружений с использованием сталефибробетона</article-title><trans-title-group xml:lang="en"><trans-title>Design and Calculation of Reinforcement of Reinforced Concrete Structures of Buildings and Structures Using Steel Fiber Concrete</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>Уткин</surname><given-names>Д. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Utkin</surname><given-names>D. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Дмитрий Геннадьевич Уткин, кандидат технических наук, доцент, доцент кафедры железобетонных и каменных конструкций</p><p>129337, г. Москва, Ярославское шоссе, д. 26</p></bio><bio xml:lang="en"><p>Dmitriy G. Utkin, Candidate of Technical Sciences, Associate Professor, of the Department of Reinforced Concrete and Masonry Structures</p><p>26 Yaroslavskoe shosse, Moscow, 129337</p></bio><email xlink:type="simple">udg70@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Национальный исследовательский Московский государственный строительный университет (НИУ МГСУ)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Moscow State University of Civil Engineering (National Research University) (MGSU)</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>28</day><month>08</month><year>2026</year></pub-date><volume>15</volume><issue>3</issue><fpage>44</fpage><lpage>52</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Уткин Д.Г., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Уткин Д.Г.</copyright-holder><copyright-holder xml:lang="en">Utkin D.G.</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://www.g-b-k.ru/jour/article/view/101">https://www.g-b-k.ru/jour/article/view/101</self-uri><abstract><p>В статье представлены варианты усиления и восстановления несущих железобетонных конструкций зданий, поврежденных в процессе эксплуатации. Эффективность использования сталефибробетона для усиления конструкций обусловлена повышенными прочностными и деформационными характеристиками материала по сравнению с железобетоном. Кроме того, многочисленные теоретические и экспериментальные исследования подтвердили повышенную в 3–5 раз трещиностойкость сталефибробетонных конструкций по сравнению с железобетонными. Определены оптимальные характеристики сталефибробетона для использования в качестве арматуры. На основе теоретических и экспериментальных исследований сформулированы предпосылки и методика расчета изгибаемых, сжато-криволинейных и обжатых железобетонных конструкций с зонным армированием из стальной фибры, работающих при статических и кратковременных динамических нагрузках. Разработанный метод расчета прочности нормальных и наклонных сечений реализует нелинейную модель деформирования, основанную на реальных диаграммах деформирования материалов. Для возможности практического применения этих исследований были разработаны алгоритм и компьютерная расчетная программа, которые позволяют инженеру подбирать оптимальные параметры сталефиброармирования, бетона и арматуры для усиления и восстановления поврежденных железобетонных конструкций путем вариантного расчета. В процессе расчета определяется процент перегрузки конструкции, необходимый уровень усиления с учетом требуемого коэффициента запаса и выбирается вариант усиления с необходимыми параметрами.</p></abstract><trans-abstract xml:lang="en"><p>The article presents options for strengthening and restoring load-bearing reinforced concrete structures of buildings damaged during operation. The effectiveness of using steel-fiber concrete to strengthen structures is due to the increased strength and deformation characteristics of the material compared to reinforced concrete. In addition, numerous theoretical and experimental studies have confirmed a 3–5-fold increased crack resistance of steel-fiber-reinforced concrete structures compared to reinforced concrete ones. The optimal characteristics of steel fiber concrete for use as reinforcement have been determined. Based on theoretical and experimental studies, the prerequisites and methodology for calculating bendable, compressed-curved and compressed reinforced concrete structures with zone reinforcement made of steel fiber operating under static and short-term dynamic loads are formulated. The developed method for calculating the strength of normal and inclined sections implements a nonlinear deformation model based on real diagrams of deformation of materials. For the possibility of practical application of these studies, an algorithm and a computer calculation program have been developed that allow the engineer to select the optimal parameters of steel fiber reinforcement, concrete and reinforcement for strengthening and restoring damaged reinforced concrete structures by variant calculation. During the calculation process, the percentage of overload of the structure is determined, the required gain level is determined taking into account the required margin factor, and a gain option with the necessary parameters is selected.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>усиление</kwd><kwd>железобетонные конструкции</kwd><kwd>сталефибробетон</kwd><kwd>перегрузка</kwd><kwd>обойма</kwd><kwd>наращивание</kwd><kwd>поверочный расчет</kwd><kwd>деформационная модель</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Reinforcement</kwd><kwd>reinforced concrete structures</kwd><kwd>steel-fiber concrete</kwd><kwd>overload</kwd><kwd>cage</kwd><kwd>build-up</kwd><kwd>calibration calculation</kwd><kwd>deformation model</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">Попов Н.Н., Расторгуев Б.С. Динамический расчет железобетонных конструкций. 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