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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">33547</article-id><article-id pub-id-type="doi">10.22363/1815-5235-2022-18-6-515-524</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">Stability of shallow shells with local changes in strength characteristics</article-title><trans-title-group xml:lang="ru"><trans-title>Устойчивость пологих оболочек покрытия при местном изменении прочностных характеристик</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7874-3646</contrib-id><name-alternatives><name xml:lang="en"><surname>Kolesnikov</surname><given-names>Alexander G.</given-names></name><name xml:lang="ru"><surname>Колесников</surname><given-names>Александр Георгиевич</given-names></name></name-alternatives><bio xml:lang="en"><p>Candidate of Technical Sciences, Associate Professor, Associate Professor of the Department of Unique Buildings and Structures</p></bio><bio xml:lang="ru"><p>кандидат технических наук, доцент кафедры уникальных зданий и сооружений</p></bio><email>ag-kolesnikov@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0076-3695</contrib-id><name-alternatives><name xml:lang="en"><surname>Osadchaya</surname><given-names>Antonina V.</given-names></name><name xml:lang="ru"><surname>Осадчая</surname><given-names>Антонина Валерьевна</given-names></name></name-alternatives><bio xml:lang="en"><p>master student, Department of Unique Buildings and Structures</p></bio><bio xml:lang="ru"><p>магистрант, кафедра уникальных зданий и сооружений</p></bio><email>tonechka.84@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">South-West State University</institution></aff><aff><institution xml:lang="ru">Юго-Западный государственный университет</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>515</fpage><lpage>524</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, Kolesnikov A.G., Osadchaya A.V.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2022, Колесников А.Г., Осадчая А.В.</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="en">Kolesnikov A.G., Osadchaya A.V.</copyright-holder><copyright-holder xml:lang="ru">Колесников А.Г., Осадчая А.В.</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/33547">https://journals.rudn.ru/structural-mechanics/article/view/33547</self-uri><abstract xml:lang="en"><p style="text-align: justify;">The authors deal with the structures of buildings in the form of shallow shells with some damage. The derivation of equations is given taking into account the geometric nonlinearity of the work of a thin-walled structure. A technique for solving systems of equations using the Bubnov - Galyorkin method is given. The work of the structure with various ways of fixing the edges is simulated. Damage is specified by changing the modulus of elasticity in an arbitrary section of the structure. The influence of the shape and location of the defect on the value of the critical load is investigated. The results of the studies carried out are given in a dimensionless form and illustrated by graphs, which makes it convenient to use them in engineering calculations. Recommendations are given for correcting the shape and thickness of coating structures in the form of shallow shells in order to maintain their bearing capacity in the event of defects. The proposed method can be used to determine and investigate the stress-strain state of structures in the form of shallow shells, taking into account the geometric nonlinearity of work in the presence of defects in them. The constructed graphs of the dependence of the critical load on various parameters make it possible to evaluate the operation of structures, taking into account changes in various factors at various stages of the structure's operation. The use of varying characteristics of the reduction in the modulus of elasticity, which appears because of the occurrence of a defect, shows results that are close to real conditions.</p></abstract><trans-abstract xml:lang="ru"><p style="text-align: justify;">Рассматриваются конструкции покрытий зданий и сооружений в виде пологих оболочек, имеющих некоторые повреждения. Выводятся уравнения, учитывающие геометрическую нелинейность работы тонкостенной конструкции. Дается методика решения систем уравнений с помощью метода Бубнова - Галеркина. Моделируется работа конструкции с различными способами закрепления краев. Повреждения задаются изменением модуля упругости на произвольном участке конструкции. Исследуется влияние формы и расположения дефекта на величину критической нагрузки. Результаты проведенных исследований приводятся в безразмерном виде и иллюстрируются графиками, что делает удобным их использование в инженерных расчетах. Даются рекомендации по корректировке формы и толщины конструкций покрытий в виде пологих оболочек для сохранения их несущей способности при возникновении дефектов. Предложенная постановка задачи может использоваться для определения и исследования напряженно-деформированного состояния конструкций в виде пологих оболочек с учетом геометрической нелинейности работы при наличии в них дефектов. Построенные графики зависимости критической нагрузки от различных параметров позволяют оценить работу конструкций с учетом изменения различных факторов на разных стадиях работы конструкции. Использование изменяющихся характеристик снижения модуля упругости, возникающих вследствие возникновения дефекта, показывает результаты, приближенные к реальным условиям.</p></trans-abstract><kwd-group xml:lang="en"><kwd>shallow shell</kwd><kwd>stress-strain state</kwd><kwd>spatial structure</kwd><kwd>defect</kwd><kwd>critical load</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>пологая оболочка</kwd><kwd>напряженно-деформированное состояние</kwd><kwd>пространственная конструкция</kwd><kwd>дефект</kwd><kwd>критическая нагрузка</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Nie G., Chan C., Yao J., He X. Asymptotic solution for nonlinear buckling of orthotropic shells on elastic foundation. 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