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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">34421</article-id><article-id pub-id-type="doi">10.22363/1815-5235-2023-19-1-46-55</article-id><article-id pub-id-type="edn">DURVQB</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">Evaluation of a reliability index for steel trusses to the deflection criterion with interval uncertainty of data</article-title><trans-title-group xml:lang="ru"><trans-title>Оценка индекса надежности стальных ферм по критерию жесткости при интервальной неопределенности данных</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7083-7963</contrib-id><contrib-id contrib-id-type="spin">4738-8927</contrib-id><name-alternatives><name xml:lang="en"><surname>Solovev</surname><given-names>Sergey A.</given-names></name><name xml:lang="ru"><surname>Соловьев</surname><given-names>Сергей Александрович</given-names></name></name-alternatives><bio xml:lang="en"><p>Candidate of Technical Sciences, Associate Professor of the Industrial and Civil Engineering Department</p></bio><bio xml:lang="ru"><p>кандидат технических наук, доцент кафедры промышленного и гражданского строительства</p></bio><email>solovevsa@vogu35.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7034-8606</contrib-id><contrib-id contrib-id-type="spin">7977-7778</contrib-id><name-alternatives><name xml:lang="en"><surname>Inkov</surname><given-names>Alexander E.</given-names></name><name xml:lang="ru"><surname>Иньков</surname><given-names>Александр Эдуардович</given-names></name></name-alternatives><bio xml:lang="en"><p>postgraduate student, Assistant of the Department of Industrial and Civil Engineering</p></bio><bio xml:lang="ru"><p>аспирант, ассистент кафедры промышленного и гражданского строительства</p></bio><email>inkovaie@vogu35.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5285-5882</contrib-id><contrib-id contrib-id-type="spin">5162-9279</contrib-id><name-alternatives><name xml:lang="en"><surname>Soloveva</surname><given-names>Anastasia A.</given-names></name><name xml:lang="ru"><surname>Соловьева</surname><given-names>Анастасия Андреевна</given-names></name></name-alternatives><bio xml:lang="en"><p>postgraduate student, lecturer of the Department of Industrial and Civil Engineering</p></bio><bio xml:lang="ru"><p>аспирант, преподаватель кафедры промышленного и гражданского строительства</p></bio><email>solovevaaa@vogu35.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Vologda State University</institution></aff><aff><institution xml:lang="ru">Вологодский государственный университет</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2023-03-30" publication-format="electronic"><day>30</day><month>03</month><year>2023</year></pub-date><volume>19</volume><issue>1</issue><issue-title xml:lang="en">VOL 19, NO1 (2023)</issue-title><issue-title xml:lang="ru">ТОМ 19, №1 (2023)</issue-title><fpage>46</fpage><lpage>55</lpage><history><date date-type="received" iso-8601-date="2023-04-15"><day>15</day><month>04</month><year>2023</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2023, Solovev S.A., Inkov A.E., Soloveva A.A.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2023, Соловьев С.А., Иньков А.Э., Соловьева А.А.</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="en">Solovev S.A., Inkov A.E., Soloveva A.A.</copyright-holder><copyright-holder xml:lang="ru">Соловьев С.А., Иньков А.Э., Соловьева А.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/34421">https://journals.rudn.ru/structural-mechanics/article/view/34421</self-uri><abstract xml:lang="en"><p style="text-align: justify;">The authors describe a new approach to evaluation the reliability index of steel trusses by the criterion of deflection considering the uncertainty of random variables expressed in the interval form. Classical probabilistic-statistical methods of structural reliability analysis require the choice and justification of the cumulative distribution functions for random variables and its parameters. Subjective acceptance of statistical hypotheses can lead to large errors in the structural reliability analysis. In this study, it is proposed to represent random variables in the interval form that characterize the boundaries of their variability. Such intervals can be obtained as tolerances by the technical documentation, can be based on the construction experience or can be got by data analyzing. The Vysochansky - Petunin inequality is used to obtain the limits of variability of a random variable without a hypothesis about a specific probability distribution function. The reliability analysis of bar-systems is complicated due to the uncertainty of the data in each element of the system. For the engineering solution of this problem, an analytical approach to the optimization problem is offered. The truss reliability index can be used to compare several design solutions in a quantitative form according to the criterion of operational safety.</p></abstract><trans-abstract xml:lang="ru"><p style="text-align: justify;">Представлен новый подход к оценке индекса надежности стальных ферм по критерию жесткости с учетом неопределенности случайных величин, выраженной в интервальной форме. Классические вероятностно-статистические методы анализа надежности требуют выбора и обоснования законов распределения случайных величин и их параметров. Субъективное принятие статистических гипотез может привести к большим ошибкам в анализе надежности строительных конструкций. В исследовании представляются случайные величины в виде интервалов, которые характеризуют границы их изменчивости. Такие интервалы могут быть получены как допуски в рамках технической документации, по опыту строительных работ или путем анализа данных. Показана возможность использования неравенства Высочанского - Петунина для получения границ изменчивости случайной величины без гипотезы о конкретном распределении вероятностей. Анализ надежности стержневых систем усложняется за счет неопределенности данных в каждом элементе системы. Для инженерного решения этой проблемы представлен аналитический подход к задаче оптимизации, на основе которой вычисляется индекс надежности. Получение индекса надежности фермы позволяет в количественной форме сравнить несколько проектных решений ферм по критерию безопасности эксплуатации.</p></trans-abstract><kwd-group xml:lang="en"><kwd>calculation of the reliability</kwd><kwd>steel structures</kwd><kwd>Vysochansky - Petunin inequality</kwd><kwd>probabilistic design</kwd><kwd>limit state model</kwd><kwd>failure probability</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>расчет надежности</kwd><kwd>стальные конструкции</kwd><kwd>неравенство Высочанского - Петунина</kwd><kwd>вероятностное проектирование</kwd><kwd>модель предельного состояния</kwd><kwd>вероятность безотказной работы</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">Mkrtychev O.V., Rajzer V.D. Reliability theory in structural design. Moscow: ASV Publ.; 2016. (In Russ.)</mixed-citation><mixed-citation xml:lang="ru">Мкртычев О.В., Райзер В.Д. 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