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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">48307</article-id><article-id pub-id-type="doi">10.22363/1815-5235-2025-21-5-432-440</article-id><article-id pub-id-type="edn">EDACPF</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Analytical and numerical methods of analysis of structures</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Аналитические и численные методы расчета 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">Fracture Mechanics of a Three-Layer Wall Panel Based on Two-Stage Concrete</article-title><trans-title-group xml:lang="ru"><trans-title>Механика разрушения трехслойной стеновой панели на основе каркасного бетона</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6520-0204</contrib-id><contrib-id contrib-id-type="spin">7617-8578</contrib-id><name-alternatives><name xml:lang="en"><surname>Syromyasov</surname><given-names>Alexey O.</given-names></name><name xml:lang="ru"><surname>Сыромясов</surname><given-names>Алексей Олегович</given-names></name></name-alternatives><bio xml:lang="en"><p>Candidate of Physical and Mathematical Sciences, Associate Professor at the Department of Applied Mathematics</p></bio><bio xml:lang="ru"><p>кандидат физико-математических наук, доцент кафедры прикладной математики</p></bio><email>syal1@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6242-4138</contrib-id><contrib-id contrib-id-type="spin">4679-9363</contrib-id><name-alternatives><name xml:lang="en"><surname>Makarov</surname><given-names>Yuri A.</given-names></name><name xml:lang="ru"><surname>Макаров</surname><given-names>Юрий Алексеевич</given-names></name></name-alternatives><bio xml:lang="en"><p>Candidate of Technical Sciences, Associate Professor at the Department of Applied Mathematics</p></bio><bio xml:lang="ru"><p>кандидат технических наук, доцент кафедры прикладной математики</p></bio><email>makarov.yira75@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0241-3808</contrib-id><contrib-id contrib-id-type="spin">9764-3898</contrib-id><name-alternatives><name xml:lang="en"><surname>Elchishcheva</surname><given-names>Tatiana F.</given-names></name><name xml:lang="ru"><surname>Ельчищева</surname><given-names>Татьяна Федоровна</given-names></name></name-alternatives><bio xml:lang="en"><p>Candidate of Technical Sciences, Head of the Department of Architecture and Urban Planning</p></bio><bio xml:lang="ru"><p>кандидат технических наук, заведующий кафедрой архитектуры и градостроительства</p></bio><email>elschevat@mail.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8407-8144</contrib-id><contrib-id contrib-id-type="spin">4425-5045</contrib-id><name-alternatives><name xml:lang="en"><surname>Erofeev</surname><given-names>Vladimir T.</given-names></name><name xml:lang="ru"><surname>Ерофеев</surname><given-names>Владимир Трофимович</given-names></name></name-alternatives><bio xml:lang="en"><p>Doctor of Technical Sciences, Professor at the Department of Construction Materials Science</p></bio><bio xml:lang="ru"><p>доктор технических наук, профессор кафедры строительного материаловедения</p></bio><email>erofeevvt@bk.ru</email><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8443-1291</contrib-id><contrib-id contrib-id-type="spin">8722-2173</contrib-id><name-alternatives><name xml:lang="en"><surname>Kozhanov</surname><given-names>Dmitry A.</given-names></name><name xml:lang="ru"><surname>Кожанов</surname><given-names>Дмитрий Александрович</given-names></name></name-alternatives><bio xml:lang="en"><p>Candidate of Physical and Mathematical Sciences, Associate Professor at the Department of Structural Theory and Technical Mechanics</p></bio><bio xml:lang="ru"><p>кандидат физико-математических наук, доцент кафедры теории сооружений и технической механики</p></bio><email>pbk996@mail.ru</email><xref ref-type="aff" rid="aff4"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">National Research Mordovian State University named after N.P. Ogarev</institution></aff><aff><institution xml:lang="ru">Национальный исследовательский Мордовский государственный университет им. Н.П. Огарева</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Tambov State Technical University</institution></aff><aff><institution xml:lang="ru">Тамбовский государственный технический университет</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">National Research Moscow State University of Civil Engineering</institution></aff><aff><institution xml:lang="ru">Национальный исследовательский Московский государственный строительный университет</institution></aff></aff-alternatives><aff-alternatives id="aff4"><aff><institution xml:lang="en">Nizhny Novgorod State University of Architecture and Civil Engineering</institution></aff><aff><institution xml:lang="ru">Нижегородский государственный архитектурно-строительный университет</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-12-15" publication-format="electronic"><day>15</day><month>12</month><year>2025</year></pub-date><volume>21</volume><issue>5</issue><issue-title xml:lang="en">VOL 21, NO5 (2025)</issue-title><issue-title xml:lang="ru">ТОМ 21, №5 (2025)</issue-title><fpage>432</fpage><lpage>440</lpage><history><date date-type="received" iso-8601-date="2026-01-31"><day>31</day><month>01</month><year>2026</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Syromyasov A.O., Makarov Y.A., Elchishcheva T.F., Erofeev V.T., Kozhanov D.A.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Сыромясов А.О., Макаров Ю.А., Ельчищева Т.Ф., Ерофеев В.Т., Кожанов Д.А.</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Syromyasov A.O., Makarov Y.A., Elchishcheva T.F., Erofeev V.T., Kozhanov D.A.</copyright-holder><copyright-holder xml:lang="ru">Сыромясов А.О., Макаров Ю.А., Ельчищева Т.Ф., Ерофеев В.Т., Кожанов Д.А.</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/48307">https://journals.rudn.ru/structural-mechanics/article/view/48307</self-uri><abstract xml:lang="en"><p>Stress distribution in a three-layer wall panel based on two-stage concrete with rigid contact between the layers is modelled. The calculation is performed in ANSYS Workbench finite-element software. Values of failure criteria (principal stress and equivalent stress) are calculated near stress concentrators, i.e. edges separating the loaded and fixed faces of the panel. It is obtained that fracture begins at the boundary between the loaded and non-loaded layers of the structure. It is shown that the thermal insulation layer made of porous concrete in the center of the panel can carry part of the load acting on the bearing layer. So, structures made using the two-stage technology may withstand loads that are higher compared to that of panels with flexible ties. Moreover, it is shown that thermal resistance of the three-layer two-stage concrete panel is twice as high as for a single-layer panel of the same width. Therefore, the use of two-stage concrete panels is an effective measure for heat conservation in buildings.</p></abstract><trans-abstract xml:lang="ru"><p>Моделируется распределение напряжений в трехслойной каркасной стеновой панели с жестким контактом между слоями. Для расчета использован конечно-элементный пакет ANSYS Workbench. Значения критериев разрушения (главного и эквивалентного напряжений) вычислены вблизи концентраторов напряжений, т.е. ребер, разделяющих нагруженные и закрепленные грани панели. Получено, что разрушение начинается на границе нагруженного и ненагруженного слоев изделия. Показано, что теплоизоляционный слой из крупнопористого бетона, расположенный в центре панели, способен участвовать в восприятии части нагрузки, приходящейся на несущий слой. В связи с этим несущая способность конструкций, изготовленных по каркасной технологии, существенно повышается за счет частичного нагружения теплоизолирующего слоя. Поэтому каркасная панель может выдерживать большие нагрузки по сравнению с панелями, имеющими гибкие связи. Кроме того, показано, что термическое сопротивление трехслойной каркасной панели вдвое выше, чем у однослойной панели такой же толщины. Тем самым использование каркасных панелей является эффективным средством сохранения тепла в зданиях.</p></trans-abstract><kwd-group xml:lang="en"><kwd>computer modeling</kwd><kwd>multilayer enclosing structures</kwd><kwd>strength</kwd><kwd>porous concrete</kwd><kwd>thermal insulation properties</kwd><kwd>finite-element analysis</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>компьютерное моделирование</kwd><kwd>многослойные ограждающие конструкции</kwd><kwd>прочность</kwd><kwd>крупнопористый бетон</kwd><kwd>теплоизоляционные свойства</kwd><kwd>конечно-элементный анализ</kwd></kwd-group><funding-group/></article-meta><fn-group/></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Sheina S.G., Umnyakova N.P., Fedaeva P.V., Minenko E.N. The best European experience in implementing energy-saving technologies in the housing stock of the Russian Federation. Housing Construction. 2020;(6):29-34. 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