<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE root>
<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">33548</article-id><article-id pub-id-type="doi">10.22363/1815-5235-2022-18-6-525-533</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Analysis and design of building structures</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Расчет и проектирование строительных конструкций</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">Numerical-analytical method in reinforced concrete mechanics</article-title><trans-title-group xml:lang="ru"><trans-title>Численно-аналитический метод в механике железобетона</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5075-1134</contrib-id><name-alternatives><name xml:lang="en"><surname>Kolchunov</surname><given-names>Vladimir I.</given-names></name><name xml:lang="ru"><surname>Колчунов</surname><given-names>Владимир Иванович</given-names></name></name-alternatives><bio xml:lang="en"><p>corresponding member of the RAASN, Doctor of Technical Sciences, Professor of the Department of Unique Buildings and Structures</p></bio><bio xml:lang="ru"><p>член-корреспондент РААСН, доктор технических наук, профессор, профессор кафедры уникальных зданий и сооружений</p></bio><email>vlik52@mail.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Southwestern State University</institution></aff><aff><institution xml:lang="ru">Юго-Западный государственный университет</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Research Institute of Building Physics of the RAACS</institution></aff><aff><institution xml:lang="ru">Научно-исследовательский институт строительной физики Российской академии архитектуры и строительных наук</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>6</issue><issue-title xml:lang="en">Scientific Legacy of Academician Vitaly Mikhailovich Bondarenko</issue-title><issue-title xml:lang="ru">Научное наследие академика Виталия Михайловича Бондаренко</issue-title><fpage>525</fpage><lpage>533</lpage><history><date date-type="received" iso-8601-date="2023-02-10"><day>10</day><month>02</month><year>2023</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2022, Kolchunov V.I.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2022, Колчунов В.И.</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="en">Kolchunov V.I.</copyright-holder><copyright-holder xml:lang="ru">Колчунов В.И.</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/33548">https://journals.rudn.ru/structural-mechanics/article/view/33548</self-uri><abstract xml:lang="en"><p style="text-align: justify;">A variant of the numerical-analytical method in the nonlinear mechanics of reinforced concrete is proposed. Calculation models make it possible to take into account a number of important factors, such as discrete cracks, the effect of concrete discontinuity, and reinforcement reactions in a crack. When solving the inverse problem of determining the width of the crack opening, the deformation effect is not set, but is modeled using the “joining” of the assigned minimum possible width, its opening under the appropriate loading. In the calculation scheme, pairs of finite elements are distinguished, adjacent to such a crack from opposite special sides, called a two-element cantilever model. Pairs are considered in two states: before their jointing of cracks and after their jointing, taking into account the deformation effect and the effect of concrete discontinuity. The calculation algorithm is based on combinations of an analytical model for calculating the stiffness of complexly stressed structures and the intelligence of the “LIRA-SAPR” software package.</p></abstract><trans-abstract xml:lang="ru"><p style="text-align: justify;">Предложен вариант численно-аналитического метода в нелинейной механике железобетона. Расчетные модели позволяют учитывать ряд важных факторов, таких как дискретные трещины, эффект несплошности бетона и реакций арматуры в трещине. При решении обратной задачи определения ширины раскрытия трещин деформационное воздействие не задается, а моделируется с помощью «расшивки» назначаемой минимально возможной ширины, ее раскрытия при соответствующем нагружении. В расчетной схеме выделяются пары конечных элементов, прилегающих к такой трещине с противоположных специальных сторон, называемые двухэлементной консольной моделью. Пары рассматриваются в двух состояниях: до «расшивки» трещин и после их «расшивки» с учетом деформационного воздействия и эффекта нарушения сплошности бетона. Алгоритм расчета строится на основе комбинаций аналитической модели расчета жесткости сложно напряженных конструкций и интеллекта программного комплекса «ЛИРА-САПР».</p></trans-abstract><kwd-group xml:lang="en"><kwd>discontinuity effect</kwd><kwd>reinforced concrete</kwd><kwd>opening width</kwd><kwd>modeling</kwd><kwd>discrete cracks</kwd><kwd>surface</kwd><kwd>two-element console</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>эффект несплошности</kwd><kwd>железобетон</kwd><kwd>ширина раскрытия</kwd><kwd>моделирование</kwd><kwd>дискретные трещины</kwd><kwd>поверхность</kwd><kwd>двухэлементная консоль</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Bondarenko V.M., Kolchunov Vl.I. Calculation models of force resistance of reinforced concrete. Moscow: ASV Publ.; 2004. (In Russ.)</mixed-citation><mixed-citation xml:lang="ru">Бондаренко В.М., Колчунов Вл.И. Расчетные модели силового сопротивления железобетона. М.: Изд-во АСВ, 2004. 471 с.</mixed-citation></citation-alternatives></ref><ref id="B2"><label>2.</label><citation-alternatives><mixed-citation xml:lang="en">Bashirov Kh.Z., Kolchunov V.I., Fedorov V.S., Yakovenko I.A. Reinforced concrete composite structures of buildings and structures. Moscow: ASV Publ.; 2017. (In Russ.)</mixed-citation><mixed-citation xml:lang="ru">Баширов Х.З., Колчунов В.И., Федоров В.С., Яковенко И.А. Железобетонные составные конструкции зданий и сооружений. М.: Изд-во АСВ, 2017. 248 с.</mixed-citation></citation-alternatives></ref><ref id="B3"><label>3.</label><citation-alternatives><mixed-citation xml:lang="en">Veryuzhsky Yu.V., Golyshev A.B., Kolchunov Vl.I., Klyueva N.V., Lisitsin B.M., Mashkov I.L., Yakovenko I.A. Reference manual on structural mechanics (vol. 2). Moscow: ASV Publ.; 2014. (In Russ.)</mixed-citation><mixed-citation xml:lang="ru">Верюжский Ю.В., Голышев А.Б., Колчунов Вл.И., Клюева Н.В., Лисицин Б.М., Машков И.Л., Яковенко И.А. Справочное пособие по строительной механике: в 2 т. Т. 2. М.: Изд-во АСВ, 2014. 432 с.</mixed-citation></citation-alternatives></ref><ref id="B4"><label>4.</label><citation-alternatives><mixed-citation xml:lang="en">Travush V.I., Karpenko N.I., Kolchunov V.I., Kaprielov S.S., Demyanov A.I., Konorev A.V. Results of experimental studies of structures of square and box sections made of high-strength concrete when twisting with bending. Construction and Reconstruction. 2018;(6):32-43. (In Russ.)</mixed-citation><mixed-citation xml:lang="ru">Травуш В.И., Карпенко Н.И., Колчунов В.И., Каприелов С.С., Демьянов А.И., Конорев А.В. Результаты экспериментальных исследований конструкций квадратного и коробчатого сечений из высокопрочного бетона при кручении с изгибом // Строительство и реконструкция. 2018. № 6 (80). С. 32-43.</mixed-citation></citation-alternatives></ref><ref id="B5"><label>5.</label><mixed-citation>Fedorov V.S., Kolchunov V.I., Pokusaev A.A., Naumov N.V. Calculation models of deformation of reinforced concrete constructions with spatial cracks. Russian Journal of Building Construction and Architecture. 2020;(3):6-26. http://doi.org/10.36622/VSTU.2020.47.3.001</mixed-citation></ref><ref id="B6"><label>6.</label><mixed-citation>Karpenko N.I., Kolchunov Vl.I., Travush V.I. Calculation model of a complex stress reinforced concrete element of a boxed section during torsion with bending. Russian Journal of Building Construction and Architecture. 2021;(3):7-26. http://doi.org/10.36622/VSTU.2021.51.3.001</mixed-citation></ref><ref id="B7"><label>7.</label><mixed-citation>Kim C., Kim S., Kim K.-H., Shin D., Haroon M., Lee J.-Y. Torsional Behavior of Reinforced Concrete Beams with High-Strength Steel Bars. ACI Structural Journal. 2019;116:251-233. https://doi.org/10.14359/51718014</mixed-citation></ref><ref id="B8"><label>8.</label><mixed-citation>Bernardo L. Modeling the full behavior of reinforced concrete flanged beams under torsion. Applied Sciences. 2019;9:2730. https://doi.org/10.3390/app9132730</mixed-citation></ref><ref id="B9"><label>9.</label><mixed-citation>Lin W. Experimental investigation on composite beams under combined negative bending and torsional moments. Advances in Structural Engineering. 2021;24(6):1456-1465. http://doi.org/10.1177/1369433220981660</mixed-citation></ref><ref id="B10"><label>10.</label><mixed-citation>Kolchunov V., Demyanov A., Naumov N. Analysis of the “nagel effect” in reinforced concrete structures under torsion with bending. IOP Conference Series: Materials Science and Engineering. 2020;953:012052. http://doi.org/10.1088/1757-899X/953/1/012052</mixed-citation></ref><ref id="B11"><label>11.</label><mixed-citation>Kolchunov V., Smirnov B., Naumov N. Physical essence of the “nagel effect” for main reinforcement in an inclined crack of reinforced concrete structures. IOP Conference Series: Materials Science and Engineering. 2020;896: 012055. http://doi.org/10.1088/1757-899X/896/1/012055</mixed-citation></ref><ref id="B12"><label>12.</label><mixed-citation>Kolchunov V.I., Demyanov A.I., Naumov N.V., Mikhaylov M.M. Calculation of the stiffness of reinforced concrete structures under the action of torsion and bending. Journal of Physics: Conference Series. 2019;1425:012077. http://doi.org/10.1088/1742-6596/1425/1/012077</mixed-citation></ref><ref id="B13"><label>13.</label><mixed-citation>Kolchunov V.I., Demyanov A.I., Naumov N.V. The second stage of the stress-strain state of reinforced concrete constructions under the action of torsion with bending (theory). IOP Conference Series: Materials Science and Engineering: International Science and Technology Conference “FarEastCon 2019”, Vladivostok, Russky Island. Vladivostok, Russky Island: Institute of Physics Publishing; 2020. p. 1-9.</mixed-citation></ref><ref id="B14"><label>14.</label><mixed-citation>Kolchunov Vl.I., Demyanov A.I. The modeling method of discrete cracks and rigidity in reinforced concrete. Magazine of Civil Engineering. 2019;(4):60-69. http://doi.org/10.18720/MCE.88.6</mixed-citation></ref><ref id="B15"><label>15.</label><mixed-citation>Demyanov A.I., Kolchunov V.I. The dynamic loading in longitudinal and transverse reinforcement at instant emergence of the spatial crack in reinforced concrete element under the action of a torsion with bending. Journal of Applied Engineering Science. 2017;15(3):381-386. http://doi.org/10.5937/jaes15-14663</mixed-citation></ref><ref id="B16"><label>16.</label><mixed-citation>Kolchunov Vl.I., Demyanov A.I. The modeling method of discrete cracks in reinforced concrete under the torsion with bending. Magazine of Civil Engineering. 2018;(5):160-173. http://doi.org/10.18720/MCE.81.16</mixed-citation></ref><ref id="B17"><label>17.</label><mixed-citation>Kolchunov V.I., Kolchunov Vl.I., Fedorova N.V. Deformation models of reinforced concrete under special impacts. Promyshlennoe i Grazhdanskoe Stroitelstvo. 2018;8:54-60.</mixed-citation></ref><ref id="B18"><label>18.</label><citation-alternatives><mixed-citation xml:lang="en">Karpenko N.I. General models of reinforced concrete mechanics. Moscow: Stroyizdat Publ.; 1996. (In Russ.)</mixed-citation><mixed-citation xml:lang="ru">Карпенко Н.И. Общие модели механики железобетона. М.: Стройиздат, 1996. 410 с.</mixed-citation></citation-alternatives></ref><ref id="B19"><label>19.</label><citation-alternatives><mixed-citation xml:lang="en">Golyshev A.B., Kolchunov Vl.I. Resistance of reinforced concrete. Kyiv: Osnova Publ.; 2009. (In Russ.)</mixed-citation><mixed-citation xml:lang="ru">Голышев А.Б., Колчунов Вл.И. Сопротивление железобетона. Киев: Основа, 2009. 432 с.</mixed-citation></citation-alternatives></ref><ref id="B20"><label>20.</label><citation-alternatives><mixed-citation xml:lang="en">Golyshev A.B., Kolchunov V.I., Yakovenko I.A. Resistance of reinforced concrete structures, buildings and structures erected in difficult engineering and geological conditions. Kyiv: Talcom Publ.; 2015. (In Russ.)</mixed-citation><mixed-citation xml:lang="ru">Голышев А.Б., Колчунов В.И., Яковенко И.А. Сопротивление железобетонных конструкций, зданий и сооружений, возводимых в сложных инженерно-геологических условиях: монография. Киев: Талком, 2015. 371 с.</mixed-citation></citation-alternatives></ref><ref id="B21"><label>21.</label><citation-alternatives><mixed-citation xml:lang="en">Kolchunov Vl.I., Mikhailov M.M., Demyanov A.I. Static-dynamic deformation of compressed concrete in an indeterminate reinforced concrete frame during bending with torsion. News of Higher Educational Institutions. Construction. 2020;(4):5-21. (In Russ.)</mixed-citation><mixed-citation xml:lang="ru">Колчунов Вл.И., Михайлов М.М., Демьянов А.И. Статико-динамическое деформирование сжатого бетона в неопределимой железобетонной раме при изгибе с кручением // Известия вузов. Строительство. 2020. № 4. С. 5-21.</mixed-citation></citation-alternatives></ref><ref id="B22"><label>22.</label><citation-alternatives><mixed-citation xml:lang="en">Kolchunov V.I., Yakovenko I.A., Tugay T.V. Method for calculating the stiffness of plane-stressed reinforced concrete structures using the Lira-Pro software package. Collection of Scientific Papers (Series of Industrial Engineering, Construction). 2014;3(2):55-66. (In Russ.)</mixed-citation><mixed-citation xml:lang="ru">Колчунов В.И., Яковенко И.А., Тугай Т.В. Методика расчета жесткости плосконапряженных железобетонных конструкций с привлечением программного комплекса «Лира-Pro» // Сборник научных трудов (Серия: Отраслевое машиностроение, строительство). Полтава: ПолтНТУ, 2014. Вып. 3 (42). Т. 2. С. 55-66.</mixed-citation></citation-alternatives></ref></ref-list></back></article>
