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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">23597</article-id><article-id pub-id-type="doi">10.22363/1815-5235-2020-16-2-131-138</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Theory of thin elastic shells</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Теория тонких оболочек</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">Analytical ruled surfaces and their complete classification</article-title><trans-title-group xml:lang="ru"><trans-title>Аналитические линейчатые поверхности и их полная классификация</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Krivoshapko</surname><given-names>Sergey N.</given-names></name><name xml:lang="ru"><surname>Кривошапко</surname><given-names>Сергей Николаевич</given-names></name></name-alternatives><bio xml:lang="en"><p>DSc, Professor, Professor of the Department of Civil Engineering, Academy of Engineering</p></bio><bio xml:lang="ru"><p>доктор технических наук, профессор, профессор департамента строительства Инженерной академии</p></bio><email>krivoshapko-sn@rudn.ru</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="2020-12-15" publication-format="electronic"><day>15</day><month>12</month><year>2020</year></pub-date><volume>16</volume><issue>2</issue><issue-title xml:lang="en">VOL 16, NO2 (2020)</issue-title><issue-title xml:lang="ru">ТОМ 16, №2 (2020)</issue-title><fpage>131</fpage><lpage>138</lpage><history><date date-type="received" iso-8601-date="2020-04-29"><day>29</day><month>04</month><year>2020</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2020, Krivoshapko S.N.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2020, Кривошапко С.Н.</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="en">Krivoshapko S.N.</copyright-holder><copyright-holder xml:lang="ru">Кривошапко С.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/">http://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.rudn.ru/structural-mechanics/article/view/23597">https://journals.rudn.ru/structural-mechanics/article/view/23597</self-uri><abstract xml:lang="en"><p>The aim of the work - to give the possibility to expand mind of designers and architects projecting structures in the form of traditional and non-canonical ruled surfaces. These surfaces have several unquestionable advantages with a point of view of their forming, designing, and making of factory-made goods and erections in the form of ruled surfaces and analysis methods. Methods. Choosing ruled surfaces for classification, one can use methods of their determination by vector, parametrical, implicit, and in explicit equations. Only analytical ruled surfaces are considered which were examined and presented in scientific-and-technical literature. Results. All known at present time ruled surfaces are given in a graphic form. The determinations of some little known ruled surfaces are presented in a paper. The original sources, where these surfaces are examined or their application in real structures and erections are considered, or methods of determination of stress-strain state in thin-walled shells with ruled middle surfaces are presented, are given in references.</p></abstract><trans-abstract xml:lang="ru"><p>Цель работы - предоставить материал, способный расширить кругозор проектировщиков и архитекторов, проектирующих объекты в форме традиционных и неканонических линейчатых поверхностей. Эти поверхности имеют ряд неоспоримых преимуществ с точки зрения их формообразования, конструирования и изготовления изделий и сооружений в форме линейчатых поверхностей и методов расчета. Методы. При подборе линейчатых поверхностей для классификации используются способы их задания в векторной, параметрической, явной и неявной формах, предлагаемых в дифференциальной геометрии. Рассматриваются только аналитические линейчатые поверхности, которые уже описаны и представлены в научно-технической литературе. Результаты. Представлены в графической форме все известные на настоящее время линейчатые поверхности. Даны определения некоторых малоизвестных линейчатых поверхностей, а в списке литературы указаны источники, в которых эти поверхности исследуются, рассматриваются вопросы их применения в реальных сооружениях или изделиях, дается методика определения напряженно-деформируемого состояния оболочек с соответствующими срединными поверхностями.</p></trans-abstract><kwd-group xml:lang="en"><kwd>analytical surface</kwd><kwd>oblique ruled surface</kwd><kwd>developable surface</kwd><kwd>classification of surfaces</kwd><kwd>differential geometry</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>аналитическая поверхность</kwd><kwd>косая линейчатая поверх- ность</kwd><kwd>развертывающаяся поверхность</kwd><kwd>классификация поверхностей</kwd><kwd>дифференциальная геометрия</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">Krivoshapko S.N., Ivanov V.N. 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