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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Structural Mechanics of Engineering Constructions and Buildings</journal-id><journal-title-group><journal-title xml:lang="en">Structural Mechanics of Engineering Constructions and Buildings</journal-title><trans-title-group xml:lang="ru"><trans-title>Строительная механика инженерных конструкций и сооружений</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1815-5235</issn><issn publication-format="electronic">2587-8700</issn><publisher><publisher-name xml:lang="en">Peoples’ Friendship University of Russia named after Patrice Lumumba (RUDN University)</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">33414</article-id><article-id pub-id-type="doi">10.22363/1815-5235-2022-18-5-475-484</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Experimental researches</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Экспериментальные исследования</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Couplings slip determination of the threadbar of strength class 500 N/mm2</article-title><trans-title-group xml:lang="ru"><trans-title>Определение податливости винтовых муфтовых соединений арматуры класса прочности 500 Н/мм2</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4646-7514</contrib-id><name-alternatives><name xml:lang="en"><surname>Grishin</surname><given-names>Grigorii E.</given-names></name><name xml:lang="ru"><surname>Гришин</surname><given-names>Григорий Евгеньевич</given-names></name></name-alternatives><bio xml:lang="en"><p>postgraduate student, design engineer of the Center No. 21, main specialist</p></bio><bio xml:lang="ru"><p>аспирант, инженер-конструктор центра № 21, главный специалист</p></bio><email>gegrishin95@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7010-4118</contrib-id><name-alternatives><name xml:lang="en"><surname>Tikhonov</surname><given-names>Georgy I.</given-names></name><name xml:lang="ru"><surname>Тихонов</surname><given-names>Георгий Игоревич</given-names></name></name-alternatives><bio xml:lang="en"><p>design engineer of the center No. 21, JSC “SIC ‘Construction’”, NIIZHB named after A.A. Gvozdev; postgraduate student, Department of Architecture, Academy of Engineering, Peoples’ Friendship University of Russia (RUDN University)</p></bio><bio xml:lang="ru"><p>инженер-конструктор центра № 21, АО «НИЦ „Строительство“», НИИЖБ имени А.А. Гвоздева; аспирант, департамент архитектуры, Инженерная академия, Российский университет дружбы народов</p></bio><email>1042190020@pfur.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-3877-0460</contrib-id><name-alternatives><name xml:lang="en"><surname>Savrasov</surname><given-names>Ivan P.</given-names></name><name xml:lang="ru"><surname>Саврасов</surname><given-names>Иван Петрович</given-names></name></name-alternatives><bio xml:lang="en"><p>Candidate of Technical Sciences, Deputy Director</p></bio><bio xml:lang="ru"><p>кандидат технических наук, заместитель директора НИИЖБ имени А.А. Гвоздева по организации научных исследований и инноваций</p></bio><email>savrasov@cstroy.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8143-4614</contrib-id><name-alternatives><name xml:lang="en"><surname>Okolnikova</surname><given-names>Galina E.</given-names></name><name xml:lang="ru"><surname>Окольникова</surname><given-names>Галина Эриковна</given-names></name></name-alternatives><bio xml:lang="en"><p>Candidate of Technical Sciences, Associate Professor of the Department of Civil Engineering, Academy of Engineering</p></bio><bio xml:lang="ru"><p>кандидат технических наук, доцент департамента строительства, Инженерная академия</p></bio><email>okolnikova-ge@rudn.ru</email><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">JSC “SIC ‘Construction’”, NIIZHB named after A.A. Gvozdev</institution></aff><aff><institution xml:lang="ru">АО «НИЦ „Строительство“», НИИЖБ имени А.А. Гвоздева</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Peoples’ Friendship University of Russia (RUDN University)</institution></aff><aff><institution xml:lang="ru">Российский университет дружбы народов</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2022-12-15" publication-format="electronic"><day>15</day><month>12</month><year>2022</year></pub-date><volume>18</volume><issue>5</issue><issue-title xml:lang="en">VOL 18, NO5 (2022)</issue-title><issue-title xml:lang="ru">ТОМ 18, №5 (2022)</issue-title><fpage>475</fpage><lpage>484</lpage><history><date date-type="received" iso-8601-date="2023-01-29"><day>29</day><month>01</month><year>2023</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2022, Grishin G.E., Tikhonov G.I., Savrasov I.P., Okolnikova G.E.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2022, Гришин Г.Е., Тихонов Г.И., Саврасов И.П., Окольникова Г.Э.</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="en">Grishin G.E., Tikhonov G.I., Savrasov I.P., Okolnikova G.E.</copyright-holder><copyright-holder xml:lang="ru">Гришин Г.Е., Тихонов Г.И., Саврасов И.П., Окольникова Г.Э.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by-nc/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.rudn.ru/structural-mechanics/article/view/33414">https://journals.rudn.ru/structural-mechanics/article/view/33414</self-uri><abstract xml:lang="en"><p style="text-align: justify;">The authors present the results of R&amp;D on the topic of coupling slip of threadbar of class Av500P. The aim of the work was to obtain experimental data to study the effect of the threadbar coupling on the slip (deformability) of the joint and taking into account the characteristics of the joint in the design of structures. The strength and deformability of coupling samples of threadbar with a diameter of 16, 25 and 40 mm with an innovative four-sided (four-row) thread profile of class Av500P have been studied in accordance with the methodology of international and Russian standards. The samples were made with different tightening torques of the lock nuts and anchor-adhesive compositions inside the coupling. Along with the results of the study, it can be concluded that these couplings of innovative four-row threadbar of class Av500P meet the requirements of international and Russian standards when applying a certain tightening torque to the tightened lock nuts, depending on the diameter of the fittings to be joined and the use of anchor-adhesive compositions on large and medium diameters of the threadbar to be joined. The diagrams of thread joints obtained during the experiment can be used in design practice when design reinforced concrete structures according to the deformation model. Together, this makes it possible to introduce thread joints into the Russian construction regulatory code.</p></abstract><trans-abstract xml:lang="ru"><p style="text-align: justify;">Приведены результаты научно-исследовательской и опытно-конструкторской работы на тему податливости винтовых муфтовых соединений арматуры класса Ав500П. Цель исследования - получение экспериментальных данных для изучения влияния винтового муфтового соединения арматуры на податливость (деформативность) соединения и учет характеристик соединения при проектировании конструкций. Проведены исследования прочности и деформативности образцов муфтовых соединений арматуры диаметром 16, 25 и 40 мм с инновационным четырехсторонним (четырехрядным) винтовым профилем класса Ав500П по методике международных и российских норм. Образцы изготавливались с различными моментами затяжек контргаек и анкерно-клеевыми составами внутри соединения. Результаты показали, что данные муфтовые соединения инновационной четырехрядной винтовой арматуры класса Ав500П удовлетворяют требованиям международных и российский норм при приложении к затягиваемым контргайкам определенного момента затяжки, зависящий от диаметра стыкуемой арматуры и применении анкерно-клеевых составов на крупных и средних диаметрах стыкуемой арматуры. Полученные в ходе эксперимента диаграммы винтовых соединений могут использоваться в практике проектирования при расчете железобетонных конструкций по деформационной модели. В совокупности это позволяет внести винтовые соединения в российскую строительную нормативную базу.</p></trans-abstract><kwd-group xml:lang="en"><kwd>threadbar</kwd><kwd>reinforced concrete</kwd><kwd>coupling joints</kwd><kwd>thread-adhesive joint</kwd><kwd>slip</kwd><kwd>deformability</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>винтовая арматура</kwd><kwd>железобетон</kwd><kwd>муфтовые соединения</kwd><kwd>резьбоклеевые соединения</kwd><kwd>податливость</kwd><kwd>деформативность</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Hu H., Wang J., Yan X. Cracking analysis of members connected by grouted splice sleeves under axial tension. 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