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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">52519</article-id><article-id pub-id-type="doi">10.22363/1815-5235-2026-22-3-199-221</article-id><article-id pub-id-type="edn">KKABDB</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">Rationing of Defects in Mounting Welds and Near-Seam Areas of Vertical Tanks made of Aluminum Alloys</article-title><trans-title-group xml:lang="ru"><trans-title>Нормирование дефектов монтажных сварных швов и околошовной зоны вертикальных резервуаров из алюминиевых сплавов</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0009-5545-5284</contrib-id><contrib-id contrib-id-type="spin">4890-2128</contrib-id><name-alternatives><name xml:lang="en"><surname>Kornev</surname><given-names>Oleg A.</given-names></name><name xml:lang="ru"><surname>Корнев</surname><given-names>Олег Александрович</given-names></name></name-alternatives><bio xml:lang="en"><p>Deputy Director, Scientific Research Institute of Experimental Mechanics</p></bio><bio xml:lang="ru"><p>заместитель директора, Научно-исследовательский институт экспериментальной механики</p></bio><email>KornevOA@mgsu.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0007-0289-7412</contrib-id><contrib-id contrib-id-type="spin">8488-4644</contrib-id><name-alternatives><name xml:lang="en"><surname>Shuvalov</surname><given-names>Aleksandr N.</given-names></name><name xml:lang="ru"><surname>Шувалов</surname><given-names>Александр Николаевич</given-names></name></name-alternatives><bio xml:lang="en"><p>Candidate of Technical Sciences, Associate Professor, Department of Testing of Structures</p></bio><bio xml:lang="ru"><p>кандидат технических наук, доцент кафедры испытания сооружений</p></bio><email>AShuvalov@mgsu.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5569-9320</contrib-id><contrib-id contrib-id-type="spin">6569-6240</contrib-id><name-alternatives><name xml:lang="en"><surname>Kornilova</surname><given-names>Anna V.</given-names></name><name xml:lang="ru"><surname>Корнилова</surname><given-names>Анна Владимировна</given-names></name></name-alternatives><bio xml:lang="en"><p>Doctor of Technical Sciences, Senior Researcher, Scientific Research Institute of Experimental Mechanics, Moscow State University of Civil Engineering (National Research University); Professor of the Department of Construction Technologies and Structural Materials, Academy of Engineering, RUDN University</p></bio><bio xml:lang="ru"><p>доктор технических наук, старший научный сотрудник, Научно-исследовательский институт экспериментальной механики, Московский государственный строительный университет (национальный исследовательский университет); профессор кафедры технологий строительства и конструкционных материалов, инженерная академия, Российский университет дружбы народов</p></bio><email>KornilovaAV@mgsu.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/0000-0002-8862-8139</contrib-id><contrib-id contrib-id-type="spin">3227-6815</contrib-id><name-alternatives><name xml:lang="en"><surname>Ermakov</surname><given-names>Valentin A.</given-names></name><name xml:lang="ru"><surname>Ермаков</surname><given-names>Валентин Алексеевич</given-names></name></name-alternatives><bio xml:lang="en"><p>Candidate of Technical Sciences, Senior Researcher, Scientific Research Institute of Experimental Mechanics</p></bio><bio xml:lang="ru"><p>кандидат технических наук, старший научный сотрудник, Научно-исследовательский институт экспериментальной механики</p></bio><email>Ermakov@mgsu.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Moscow State University of Civil Engineering (National Research University)</institution></aff><aff><institution xml:lang="ru">Московский государственный строительный университет (Национальный исследовательский университет)</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">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="2026-09-30" publication-format="electronic"><day>30</day><month>09</month><year>2026</year></pub-date><volume>22</volume><issue>3</issue><issue-title xml:lang="en">VOL 22, NO2 (2025)</issue-title><issue-title xml:lang="ru">ТОМ 22, №2 (2025)</issue-title><fpage>199</fpage><lpage>221</lpage><history><date date-type="received" iso-8601-date="2026-09-30"><day>30</day><month>09</month><year>2026</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2026, Kornev O.A., Shuvalov A.N., Kornilova A.V., Ermakov V.A.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2026, Корнев О.А., Шувалов А.Н., Корнилова А.В., Ермаков В.А.</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="en">Kornev O.A., Shuvalov A.N., Kornilova A.V., Ermakov V.A.</copyright-holder><copyright-holder xml:lang="ru">Корнев О.А., Шувалов А.Н., Корнилова А.В., Ермаков В.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/52519">https://journals.rudn.ru/structural-mechanics/article/view/52519</self-uri><abstract xml:lang="en"><p>The purpose of the study is to create a methodology for standardizing the most dangerous defects in welded aluminum structures. The methodology is designed for the weld and the heat-affected zone and takes into account the stress-strain state and material properties at the location of the defect. The proposed methodology is based on the principles of linear fracture mechanics and classical approaches to metal fatigue. The methodology determines the permissible parameters of defects under static test and cyclic operational loads. Calculations using the proposed algorithm based on the generalized reduced gradient method have shown that a smaller defect size is acceptable under operational loads. Based on the conducted experiments and literature review data, functional dependencies of the threshold value of the stress intensity factor on the yield strength of the material were formulated for three groups of aluminum alloys with different chemical and stoichiometric compositions of the components. The analysis of the obtained functional dependencies showed that as the yield strength of aluminum alloys increases, the threshold value of the stress intensity factor also increases, in contrast to steels, where an increase in the yield strength leads to a decrease in the threshold value of the stress intensity factor. The methodology is illustrated by calculating the permissible parameters of defects in the installation seams of a vertical tank made of alloy 1915T. The zones where defects are likely to occur are the center of the weld and two sections of the heat-affected zone that differ in their mechanical properties. In the future, it is planned to conduct experimental studies of welds in aluminum structures obtained using various welding technologies and to expand the range of alloys under study.</p></abstract><trans-abstract xml:lang="ru"><p>Цель исследования - создание методики нормирования наиболее опасных дефектов сварных алюминиевых конструкций. Методика разработана для сварного шва и зоны термического влияния и учитывает напряженно-деформированное состояние и свойства материала в месте расположения дефекта. Предложенная методика базируется на постулатах линейной механики разрушения и классических подходах усталости металлов. Определяются допустимые параметры дефектов при приложении статической испытательной и циклической эксплуатационной нагрузки. Расчеты по предложенному алгоритму методом обобщенного приведенного градиента показали, что при эксплуатационной нагрузке допускается меньший размер дефекта. На базе проведенных экспериментов и данных литературного обзора были сформулированы функциональные зависимости порогового значения коэффициента интенсивности напряжений от предела текучести материала для трех групп алюминиевых сплавов с различным химическим и стехиометрическим составом компонентов. Анализ полученных функциональных зависимостей показал, что при увеличении предела текучести алюминиевых сплавов пороговое значение коэффициента интенсивности напряжений также возрастает в отличие от сталей, у которых повышение предела текучести приводит к снижению порогового значения коэффициента интенсивности напряжений. Методика проиллюстрирована расчетом допустимых параметров дефектов в монтажных швах вертикального резервуара из сплава 1915Т. Рассмотрены зоны, в которых существует вероятность возникновения дефектов - центр шва и два участка зоны термического влияния, отличающихся по своим механическим свойствам. В дальнейшем предполагается проведение экспериментальных исследований сварных швов в алюминиевых конструкциях, полученных различными технологиями сварки и расширение номенклатуры исследуемых сплавов.</p></trans-abstract><kwd-group xml:lang="en"><kwd>stress-strain state</kwd><kwd>sheet metal structures</kwd><kwd>defect models</kwd><kwd>heat-affected zone</kwd><kwd>weld defects</kwd><kwd>porosity in welding</kwd><kwd>surface crack</kwd><kwd>subsurface crack</kwd><kwd>gas pocket</kwd><kwd>stress intensity factor threshold</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>напряженно-деформированное состояние</kwd><kwd>листовые конструкции</kwd><kwd>модели дефектов</kwd><kwd>зона термического влияния</kwd><kwd>дефекты сварного шва</kwd><kwd>пористость сварки</kwd><kwd>поверхностная трещина</kwd><kwd>подповерхностная трещина</kwd><kwd>газовая пора</kwd><kwd>пороговое значение коэффициента интенсивности напряжений</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">Kornev OA, Shuvalov AN, Kornilova AV, Ermakov VA. 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