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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">10.33979/2073-7416-2024-116-6-37-47</article-id><article-id custom-type="elpub" pub-id-type="custom">construction-822</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>Прочность изгибаемых трубобетонных элементов  усовершенствованной конструкции</article-title><trans-title-group xml:lang="en"><trans-title>Strength of bending concrete filled steel elements of improved design</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>Кришан</surname><given-names>А. Л.</given-names></name><name name-style="western" xml:lang="en"><surname>Krishan</surname><given-names>A. L.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кришан Анатолий Леонидович, доктор технических наук, профессор, советник РААСН, профессор кафедры проектирования и строительства зданий</p><p>г. Магнитогорск</p></bio><bio xml:lang="en"><p>Doctor of Sciences (Engineering), Professor, Adviser of RAACS, Professor of the Department of Design and Construction of Buildings</p><p>Magnitogorsk</p></bio><email xlink:type="simple">kris_al@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>Колесников</surname><given-names>В. Д.</given-names></name><name name-style="western" xml:lang="en"><surname>Kolesnikov</surname><given-names>V. D.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Колесников Владислав Дмитриевич,  аспирант кафедры проектирования и строительства зданий  </p><p>г. Магнитогорск</p></bio><bio xml:lang="en"><p>Postgraduate student of the Department of Design and Construction of Buildings</p><p>Magnitogorsk</p></bio><email xlink:type="simple">vladislav-kolesnikov74@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>Римшин</surname><given-names>В. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Rimshin</surname><given-names>V. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Римшин Владимир Иванович, доктор технических наук, профессор, член-корреспондент РААСН </p><p>г. Москва</p></bio><bio xml:lang="en"><p>Doctor of Sciences (Engineering), Professor, Corresponding Member of RAACS</p><p>Moscow</p></bio><email xlink:type="simple">v.rimshin@niisf.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Астафьева</surname><given-names>М. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Astafeva</surname><given-names>M. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Астафьева Мария Анатольевна,  кандидат технических наук, доцент кафедры проектирования и строительства зданий</p><p>г. Магнитогорск</p></bio><bio xml:lang="en"><p>Candidate of Sciences (Engineering), Docent of the Department of Design and Construction of Buildings</p><p>Magnitogorsk</p></bio><email xlink:type="simple">skymanika@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>Лихидько</surname><given-names>М. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Likhidko</surname><given-names>M. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Лихидько Михаил Алексеевич, аспирант кафедры проектирования и строительства зданий</p><p>  г. Магнитогорск</p></bio><bio xml:lang="en"><p>Postgraduate student of the Department of Design and Construction of Buildings</p><p>Magnitogorsk</p></bio><email xlink:type="simple">likhidkom@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБОУ ВО ««Магнитогорский государственный технический университет им. Г.И. Носова»</institution></aff><aff xml:lang="en"><institution>Magnitogorsk State Technical University named after G.I. Nosov</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Научно-исследовательский институт строительной физики РААСН</institution></aff><aff xml:lang="en"><institution>Scientific-Research Institute of Building Physics of RAACS</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>11</day><month>12</month><year>2024</year></pub-date><volume>0</volume><issue>6</issue><fpage>37</fpage><lpage>47</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Кришан А.Л., Колесников В.Д., Римшин В.И., Астафьева М.А., Лихидько М.А., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Кришан А.Л., Колесников В.Д., Римшин В.И., Астафьева М.А., Лихидько М.А.</copyright-holder><copyright-holder xml:lang="en">Krishan A.L., Kolesnikov V.D., Rimshin V.I., Astafeva M.A., Likhidko M.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/822">https://construction.elpub.ru/jour/article/view/822</self-uri><abstract><p>Предложена усовершенствованная конструкция изгибаемого трубобетонного элемента прямоугольного сечения, имеющая большую прочность и требующая значительно больших затрат энергии на разрушение по сравнению с известными аналогами. Для проверки эффективности предложенной конструкции проведены экспериментальные исследования прочности нормальных сечений и жесткости трубобетонных балок при четырех точечном изгибе. Исследования показали, что за счет одновременного усиления сжатой и растянутой зон удалось повысить прочность нормальных сечений балок. Рост прочности балок усовершенствованной конструкции в среднем составил 42%. Жесткость не усиленных трубобетонных балок оказалась значительно выше по сравнению с балками без заполнения стальной трубы бетоном. В балках усовершенствованной конструкции жесткость была еще примерно на 20 % выше. Результаты сопоставления расчетной прочности трубобетонных балок по методу предельных усилий с опытными данными свидетельствует об их удовлетворительном соответствии.</p></abstract><trans-abstract xml:lang="en"><p>An improved design of concrete filled steel tube element of rectangular cross-section subjected to bending has been proposed, which has greater strength and requires significantly greater energy consumption for destruction compared to known analogues. To test the effectiveness of the proposed design, experimental studies were carried out on the strength of normal sections and the beam rigidity of concrete filled steel tube beams under four-point bending. Research has shown that by simultaneously strengthening the compressed and tensile zones, it was possible to increase the strength of normal sections of beams. The increase in strength of beams of the improved design averaged 42%. The rigidity of non-reinforced concrete filled steel tube beams turned out to be significantly higher compared to beams without filling the steel pipe with concrete. In the improved beams, the stiffness was still approximately 20% higher. The results of comparing the calculated strength of concrete filled steel tube beams using the limit force method with experimental data indicate their satisfactory agreement.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>изгибаемый трубобетонный элемент</kwd><kwd>усовершенствованная  конструкция</kwd><kwd>прочность нормальных сечений</kwd><kwd>жесткость</kwd></kwd-group><kwd-group xml:lang="en"><kwd>concrete filled steel tube subjected to bending</kwd><kwd>improved design</kwd><kwd>strength of normal sections</kwd><kwd>rigidity</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">Кришан А. Л., Римшин В. И., Астафева М.А. 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