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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">35855</article-id><article-id pub-id-type="doi">10.22363/1815-5235-2023-19-2-186-198</article-id><article-id pub-id-type="edn">MUSLDE</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">Theory of short-term and long-term resistance of structures based on the principle of plastic fracture</article-title><trans-title-group xml:lang="ru"><trans-title>Теория кратковременного и длительного сопротивления конструкций на основе принципа пластического разрушения</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Beglov</surname><given-names>Alexander D.</given-names></name><name xml:lang="ru"><surname>Беглов</surname><given-names>Александр Дмитриевич</given-names></name></name-alternatives><bio xml:lang="en">Doctor of Economics, Governor of St. Petersburg</bio><bio xml:lang="ru">доктор экономических наук, губернатор Санкт-Петербурга</bio><email>gubernator@gov.spb.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7412-3789</contrib-id><name-alternatives><name xml:lang="en"><surname>Sanzharovskiy</surname><given-names>Rudolf S.</given-names></name><name xml:lang="ru"><surname>Санжаровский</surname><given-names>Рудольф Сергеевич</given-names></name></name-alternatives><bio xml:lang="en"><p>Doctor of Technical Sciences, Professor, Chief Scientific Associate</p></bio><bio xml:lang="ru"><p>доктор технических наук, профессор, главный научный сотрудник</p></bio><email>milasanj@gmail.com</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4723-8193</contrib-id><name-alternatives><name xml:lang="en"><surname>Ter-Emmanuilyan</surname><given-names>Tatyana N.</given-names></name><name xml:lang="ru"><surname>Тер-Эммануильян</surname><given-names>Татьяна Николаевна</given-names></name></name-alternatives><bio xml:lang="en"><p>Doctor of Technical Sciences, Professor, Department of Theoretical Mechanics</p></bio><bio xml:lang="ru"><p>доктор технических наук, профессор, профессор кафедры теоретической механики</p></bio><email>tanya_ter@mail.ru</email><xref ref-type="aff" rid="aff3"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Administration of St. Petersburg</institution></aff><aff><institution xml:lang="ru">Администрация Санкт-Петербурга</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Eurasian National University named after L.N. Gumilev</institution></aff><aff><institution xml:lang="ru">Евразийский национальный университет имени Л.Н. Гумилева</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Russian University of Transport</institution></aff><aff><institution xml:lang="ru">Российский университет транспорта</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2023-09-05" publication-format="electronic"><day>05</day><month>09</month><year>2023</year></pub-date><volume>19</volume><issue>2</issue><issue-title xml:lang="en">VOL 19, NO2 (2023)</issue-title><issue-title xml:lang="ru">ТОМ 19, №2 (2023)</issue-title><fpage>186</fpage><lpage>198</lpage><history><date date-type="received" iso-8601-date="2023-09-05"><day>05</day><month>09</month><year>2023</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2023, Beglov A.D., Sanzharovskiy R.S., Ter-Emmanuilyan T.N.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2023, Беглов А.Д., Санжаровский Р.С., Тер-Эммануильян Т.Н.</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="en">Beglov A.D., Sanzharovskiy R.S., Ter-Emmanuilyan T.N.</copyright-holder><copyright-holder xml:lang="ru">Беглов А.Д., Санжаровский Р.С., Тер-Эммануильян Т.Н.</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/35855">https://journals.rudn.ru/structural-mechanics/article/view/35855</self-uri><abstract xml:lang="en"><p style="text-align: justify;">The authors analyze the theory used in many countries, containing two independent directions: 1) the theory of stability of rod systems, including flat frames; 2) the theory of calculation of structural elements from various materials. The main feature of these theories is the application of the principle of plastic fracture. The assumption about a plastic hinge, due to the inconsistency with the experimental data, is supplemented by the incorrect application of theories of infinite elastic deformations, as well as of infinite creep deformations, which are incompatible with this hinge. Using the rules of mathematics, the principles of mechanics and the results of reliable experiments, it has been revealed that the analyzed theory contains several theories for different applications that reject each other, including the erroneous ones.</p></abstract><trans-abstract xml:lang="ru"><p style="text-align: justify;">Проведен анализ теории, применяемой во многих странах, содержащей два самостоятельных направления: 1) теория устойчивости стержневых систем, в том числе плоских рам; 2) теория расчета элементов конструкций из различных материалов. Основная особенность данных теорий состоит в применении принципа пластического разрушения. Допущение о пластическом шарнире из-за несоответствия экспериментальным данным дополняется ошибочным привлечением несовместимых с этим шарниром теорий о бесконечных упругих деформациях, а также о бесконечных деформациях ползучести. Используя правила математики, принципы механики и результаты солидных экспериментов, установлено, что анализируемая теория содержит набор отвергающих друг друга теорий различного назначения, в том числе ошибочных.</p></trans-abstract><kwd-group xml:lang="en"><kwd>theory of concrete creep</kwd><kwd>superposition principle</kwd><kwd>instantaneous elastic deformations</kwd><kwd>plastic hinge</kwd><kwd>reinforced concrete resistance</kwd><kwd>modern building codes</kwd><kwd>Eurocode principles</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>теория ползучести бетона</kwd><kwd>принцип наложения</kwd><kwd>мгновенные упругие деформации</kwd><kwd>пластический шарнир</kwd><kwd>сопротивление железобетона</kwd><kwd>современные строительные нормы</kwd><kwd>принципы Еврокода</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">Kazinczy G. Kiserletek befalazott tartokkal. 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