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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">RUDN Journal of Engineering Research</journal-id><journal-title-group><journal-title xml:lang="en">RUDN Journal of Engineering Research</journal-title><trans-title-group xml:lang="ru"><trans-title>Вестник Российского университета дружбы народов. Серия: Инженерные исследования</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2312-8143</issn><issn publication-format="electronic">2312-8151</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">27260</article-id><article-id pub-id-type="doi">10.22363/2312-8143-2021-22-1-84-99</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</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">Pseudospheric shells in the construction</article-title><trans-title-group xml:lang="ru"><trans-title>Псевдосферические оболочки в строительстве</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0057-3485</contrib-id><name-alternatives><name xml:lang="en"><surname>Gil-oulbé</surname><given-names>Mathieu</given-names></name><name xml:lang="ru"><surname>Жиль-улбе</surname><given-names>Матье</given-names></name></name-alternatives><bio xml:lang="en"><p>Associate Professor of the Department of Civil Engineering, Academy of Engineering, RUDN University, Candidate of Technical Sciences</p></bio><bio xml:lang="ru"><p>доцент департамента строительства инженерной академии РУДН, кандидат технических наук</p></bio><email>gil-oulbem@hotmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Ndomilep</surname><given-names>Ipel Junior Alphonse</given-names></name><name xml:lang="ru"><surname>Ндомилеп</surname><given-names>Ипел Джуниор Альфонс</given-names></name></name-alternatives><bio xml:lang="en"><p>Graduate Student of the Department of Civil Engineering, Academy of Engineering, RUDN University</p></bio><bio xml:lang="ru"><p>аспирант департамента строительства инженерной академии РУДН</p></bio><email>ndomilepjunior@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Ngandu</surname><given-names>Prosper</given-names></name><name xml:lang="ru"><surname>Нганду</surname><given-names>Проспер</given-names></name></name-alternatives><bio xml:lang="en"><p>Master Student of the Department of Civil Engineering, Academy of Engineering, RUDN University</p></bio><bio xml:lang="ru"><p>магистрант департамента строительства инженерной академии РУДН</p></bio><email>prosperngandu60@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Peoples’ Friendship University of Russia (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="2021-08-27" publication-format="electronic"><day>27</day><month>08</month><year>2021</year></pub-date><volume>22</volume><issue>1</issue><issue-title xml:lang="en">VOL 22, NO1 (2021)</issue-title><issue-title xml:lang="ru">ТОМ 22, №1 (2021)</issue-title><fpage>84</fpage><lpage>99</lpage><history><date date-type="received" iso-8601-date="2021-08-27"><day>27</day><month>08</month><year>2021</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2021, Gil-oulbé M., Ndomilep I.J., Ngandu P.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2021, Жиль-улбе М., Ндомилеп И.Д., Нганду П.</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="en">Gil-oulbé M., Ndomilep I.J., Ngandu P.</copyright-holder><copyright-holder xml:lang="ru">Жиль-улбе М., Ндомилеп И.Д., Нганду П.</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/">http://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.rudn.ru/engineering-researches/article/view/27260">https://journals.rudn.ru/engineering-researches/article/view/27260</self-uri><abstract xml:lang="en"><p style="text-align: justify;">The architects working with the shell use well-established geometry forms, which make up about 5-10 % of the number of known surfaces, in their projects. However, there is such a well-known surface of rotation, which from the 19th century to the present is very popular among mathematicians-geometers, but it is practically unknown to architects and designers, there are no examples of its use in the construction industry. This is a pseudosphere surface. For a pseudospherical surface with a pseudosphere rib radius, the Gaussian curvature at all points equals the constant negative number. The pseudosphere, or the surface of the Beltram, is generated by the rotation of the tracersis, evolvent of the chain line. The article provides an overview of known methods of calculation of pseudospherical shells and explores the strain-stress state of thin shells of revolution with close geometry parameters to identify optimal forms. As noted earlier, no examples of the use of the surface of the pseudosphere in the construction industry have been found in the scientific and technical literature. Only Kenneth Becher presented examples of pseudospheres implemented in nature: a gypsum model of the pseudosphere made by V. Martin Schilling at the end of the 19th century.</p></abstract><trans-abstract xml:lang="ru"><p style="text-align: justify;">Архитекторы, работающие с оболочкой, используют в своих проектах хорошо зарекомендовавшие себя геометрические формы, которые составляют около 5-10% от числа известных поверхностей. Однако есть такая известная поверхность вращения, которая с XIX в. по настоящее время пользуется большой популярностью среди математиков-геометров, но практически неизвестна архитекторам и дизайнерам, нет примеров ее применения в строительной отрасли. Это поверхность псевдосферы. Для псевдосферической поверхности гауссова кривизна во всех точках равна постоянному отрицательному числу. Псевдосфера, или поверхность Бельтрами, образуется вращением трактрисы. Псевдосфера, или поверхность Бельтрами, образуется вращением трассерсиса, эволюционирующего из цепной линии. В статье дается обзор известных методов расчета псевдосферических оболочек и исследуется напряженно-деформированное состояние тонких оболочек вращения с близкими геометрическими параметрами для определения оптимальных форм. Как отмечалось ранее, в научно-технической литературе не найдены примеры применения поверхности псевдосферы в строительной отрасли. Только Кеннет Бехер представил примеры псевдосфер, реализованных в природе: гипсовая модель псевдосферы, сделанная В. Мартином Шиллингом в конце XIX века.</p></trans-abstract><kwd-group xml:lang="en"><kwd>pseudosphere</kwd><kwd>Beltramy surface</kwd><kwd>tractix</kwd><kwd>bending calculation theory</kwd><kwd>temporal calculation theory</kwd><kwd>pseudosphere resistance</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>псевдосфера</kwd><kwd>поверхность Бельтрами</kwd><kwd>трактриса</kwd><kwd>теория расчета на изгиб</kwd><kwd>теория временных расчетов</kwd><kwd>прочность псевдосферических оболочек</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Trinker AB. High-rise building in extremal conditions. Montazhnie i Spetz. Raboti v Stroitelstve. 2017;9:15-19.</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Esaulov GV. Modern problems and trends in architecture. Zhilischnoe Stroitelstvo. 2013;11:20-26.</mixed-citation></ref><ref id="B3"><label>3.</label><mixed-citation>Krivoshapko SN. 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