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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">10.33979/2073-7416-2024-115-5-23-30</article-id><article-id custom-type="elpub" pub-id-type="custom">construction-805</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>Перераспределение усилий в неразрезных железобетонных балках, усиленных углепластиком под нагрузкой</article-title><trans-title-group xml:lang="en"><trans-title>Redistribution of forces in continuous reinforced concrete beams reinforced with cfrp under load</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>Обернихина</surname><given-names>Я. Л.</given-names></name><name name-style="western" xml:lang="en"><surname>Obernikhina</surname><given-names>Ya. L.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Обернихина Яна Леонидовна, старший преподаватель кафедры Строительства и городского хозяйства</p><p>г. Белгород</p></bio><bio xml:lang="en"><p>Obernikhina Yana L., Senior Lecturer of the Department of Constraction and Urban Economics</p><p>Belgorod</p></bio><email xlink:type="simple">yana.ishuk@yandex.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>Смоляго</surname><given-names>Г. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Smolyago</surname><given-names>G. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Смоляго Геннадий Алексеевич, доктор технических наук, профессор, профессор кафедры Строительства и городского хозяйства</p><p>г. Белгород</p></bio><bio xml:lang="en"><p>Smolyago Gennadiy A., D.Sc. in Technical Sciences, Professor, Professor of the Department of Constraction and Urban Economics</p><p>Belgorod</p></bio><email xlink:type="simple">str-exp@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 «Белгородский государственный технологический университет им. В.Г. Шухова (БГТУ им. В.Г. Шухова)»</institution></aff><aff xml:lang="en"><institution>Belgorod State Technological University named after V.G. Shukhov</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>23</day><month>11</month><year>2024</year></pub-date><volume>0</volume><issue>5</issue><fpage>23</fpage><lpage>30</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Обернихина Я.Л., Смоляго Г.А., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Обернихина Я.Л., Смоляго Г.А.</copyright-holder><copyright-holder xml:lang="en">Obernikhina Y.L., Smolyago G.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://construction.elpub.ru/jour/article/view/805">https://construction.elpub.ru/jour/article/view/805</self-uri><abstract><p>В данной статье приведены результаты экспериментальных исследований перераспределения изгибающих моментов в двухпролетных неразрезных железобетонных балках, усиленных углепластиком под нагрузкой, а именно, пятнадцати балок пяти серий. Первая серия балок (БМ) - эталонные образцы без усиления. Ко второй серии балок (БМУ) относились образцы, усиленные углепластиком путем приклеивания его к растянутой зоне в пролетах с U-образной анкеровкой на приопорных участках без предварительного нагружения. Третья (БМУ В), четвертая (БМУ Г) и пятая (БМУ Д) серии балок – образцы, усиленные углепластиком при 30%, 50% и 70% от предполагаемой разрушающей нагрузки эталонных образцов, аналогично второй серии балок. Для раскрытия статической неопределимости в начале и конце каждого этапа экспериментального исследования снимались показания опорных динамометров. На основании полученных данных были построены средние по каждой серии опытные эпюры изгибающих моментов. Кроме того, в результате исследования было выявлено, что усиление углепластиком оказывает влияние на характер перераспределения изгибающих моментов в неразрезных балках, изменяя соотношения опорного Mоп и пролетных Mпр моментов. Таким образом, с помощью использования системы внешнего армирования на основе полимеркомпозиционных материалов можно скорректировать при необходимости характер перераспределения изгибающих моментов в неразрезных балках. В частности, выполнив усиление пролетных зон, можно разгрузить опорную.</p></abstract><trans-abstract xml:lang="en"><p>This article presents the results of experimental studies of bending moment redistribution in two-span continuous reinforced concrete beams reinforced with CFRP under load. Namely, fifteen beams of five series. The first series of beams (СB) are reference specimens without reinforcement. The second series of beams (MSB) included specimens reinforced with CFRP by gluing it to the tension zone in spans with U-shaped anchorage in the support sections without preliminary loading. The third (MSB C), fourth (MSB D) and fifth (MSB E) series of beams are specimens reinforced with CFRP at 30%, 50% and 70% of the expected breaking load of the reference specimens, similar to the second series of beams. To reveal static indeterminacy, readings of support dynamometers were taken at the beginning and end of each stage of the experimental study. Based on the data obtained, average experimental bending moment diagrams for each series were constructed. In addition, the study revealed that carbon fiber reinforcement affects the nature of the redistribution of bending moments in continuous beams, changing the ratio of the support Msu and span Msp moments. Thus, by using an external reinforcement system based on polymer composite materials, it is possible to adjust, if necessary, the nature of the redistribution of bending moments in continuous beams. In particular, by reinforcing the span zones, it is possible to relieve the support.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>неразрезная железобетонная балка</kwd><kwd>перераспределение усилий</kwd><kwd>усиление под нагрузкой</kwd><kwd>система внешнего армирования</kwd><kwd>углепластик</kwd></kwd-group><kwd-group xml:lang="en"><kwd>continuous reinforced concrete beam</kwd><kwd>redistribution of forces</kwd><kwd>reinforcement under load</kwd><kwd>external reinforcement system</kwd><kwd>CFRP</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">Крылов С.М., Гуща Ю.П., Абаканов М.С. Прочность статически неопределимых балок, армированных сталями без площадки текучести // Сборник НИИЖБ: Прочность, жесткость и трещиностойкость железобетонных конструкций. 1979. С. 40-41.</mixed-citation><mixed-citation xml:lang="en">Krylov S.M., Gushcha Yu.P., Abakanov M.S. 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