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<article article-type="research-article" dtd-version="1.3" 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" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">vestniktgasu</journal-id><journal-title-group><journal-title xml:lang="ru">Вестник Томского государственного архитектурно-строительного университета</journal-title><trans-title-group xml:lang="en"><trans-title>Vestnik Tomskogo gosudarstvennogo arkhitekturno-stroitel'nogo universiteta. JOURNAL of Construction and Architecture</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1607-1859</issn><issn pub-type="epub">2310-0044</issn><publisher><publisher-name>Tomsk State University of Architecture and Building</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.31675/1607-1859-2020-22-4-114-125</article-id><article-id custom-type="elpub" pub-id-type="custom">vestniktgasu-829</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>СТРОИТЕЛЬНЫЕ КОНСТРУКЦИИ, ЗДАНИЯ И СООРУЖЕНИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>BUILDING AND CONSTRUCTION</subject></subj-group></article-categories><title-group><article-title>Оценка близости к проекту минимальной материалоемкости решения об оптимизации ширины кусочно-постоянных участков полки стержней двутаврового поперечного сечения при ограничениях по устойчивости или на величину первой частоты собственных колебаний с учётом требований прочности</article-title><trans-title-group xml:lang="en"><trans-title>Estimated closeness of optimum piecewise constant section width in I-rods with stability or first eigen-frequency limits to the predicted minimum material consumption with regard to strength requirements</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ляхович</surname><given-names>Л. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Lyakhovich</surname><given-names>L. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ляхович Леонид Семенович, докт. техн. наук, профессор, академик Российской академии архитектуры и строительных наук</p><p>634003, г. Томск, пл. Соляная, 2</p></bio><bio xml:lang="en"><p>Leonid S. Lyakhovich, DSc, Professor, Academician RAACS</p><p>2, Solyanaya Sq., 634003, Tomsk</p></bio><email xlink:type="simple">lls@tsuab.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Акимов</surname><given-names>П. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Akimov</surname><given-names>P. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Акимов Павел Алексеевич, докт. техн. наук, профессор, академик Российской академии архитектуры и строительных наук; главный ученый секретарь президиума</p><p>634003, г. Томск, пл. Соляная, 2</p><p>129337, г. Москва, Ярославское шоссе, 26</p><p>107031, г. Москва, ул. Большая Дмитровка, 24, стр. 1</p></bio><bio xml:lang="en"><p>Pavel A. Akimov, DSc, Professor, Academician RAACS; </p><p>2, Solyanaya Sq., 634003, Tomsk, Russia</p><p>26, Yaroslavskoe Road, 129337, Moscow, Russia</p></bio><email xlink:type="simple">akimov@raasn.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Тухфатуллин</surname><given-names>Б. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Tukhfatullin</surname><given-names>B. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Тухфатуллин Борис Ахатович, канд. техн. наук, доцент</p><p>634003, г. Томск, пл. Соляная, 2</p></bio><bio xml:lang="en"><p>Boris A. Tukhfatullin, PhD, A/Professor</p><p>2, Solyanaya Sq., 634003, Tomsk, Russia</p></bio><email xlink:type="simple">bat9203@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Томский государственный архитектурно-строительный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Tomsk State University of Architecture and Building</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Томский государственный архитектурно-строительный университет; Национальный исследовательский Московский государственный строительный университет; Российская академия архитектуры и строительных наук</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Tomsk State University of Architecture and Building; The National Research Moscow State University of Civil Engineering; Russian Academy of Architecture and Construction Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2020</year></pub-date><pub-date pub-type="epub"><day>27</day><month>08</month><year>2020</year></pub-date><volume>22</volume><issue>4</issue><fpage>114</fpage><lpage>125</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Ляхович Л.С., Акимов П.А., Тухфатуллин Б.А., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Ляхович Л.С., Акимов П.А., Тухфатуллин Б.А.</copyright-holder><copyright-holder xml:lang="en">Lyakhovich L.S., Akimov P.A., Tukhfatullin B.A.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://vestnik.tsuab.ru/jour/article/view/829">https://vestnik.tsuab.ru/jour/article/view/829</self-uri><abstract><p>В одной из предыдущих работ авторов данной статьи рассматривалась задача об оценке близости решения к проекту минимальной материалоёмкости при оптимизации ширины полок стержней двутаврового поперечного сечения при ограничениях по устойчивости или величины первой частоты собственных колебаний с учётом требований прочности в случае непрерывного изменения варьируемых параметров по длине стержня. При этом известно, что в строительной практике в основном стержни проектируются с куcочно-постоянным изменением параметров сечения. В другой статье авторов был сформулирован критерий оценки оптимальных решений при формирования кусочно-постоянных участков полки стержней двутаврового сечения при ограничениях по устойчивости или величине первой частоты собственных колебаний, но без учёта требований прочности. В данной статье рассматривается более общая задача об оценке оптимальных решений при формировании кусочно-постоянных участков ширины полок стержней двутаврового сечения при ограничениях по устойчивости или величины первой частоты собственных колебаний, но с учётом требований прочности и некоторых конструктивных ограничений.</p></abstract><trans-abstract xml:lang="en"><p>The previous research described estimated closeness of optimum piecewise constant section width in I-rods with stability or first eigen-frequency limits to the predicted minimum material consumption with regard to strength requirements in continuous change in variable rod parameters. It is however known that in construction, rods are generally designed with piecewise constant change in the section parameters. Besides, in another work, the criterion was formulated for assessment of optimum solutions of piecewise constant sections of I-rods with stability or the first eigen-frequency limits, without considering the strength requirements. This paper focuses on a more general problem of estimated closeness of optimum piecewise constant section width in I-rods with stability or first eigen-frequency limits to the predicted minimum material consumption with regard to strength requirements.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>критерий</kwd><kwd>оптимизация</kwd><kwd>устойчивость</kwd><kwd>частота</kwd><kwd>критическая сила</kwd><kwd>формы потери устойчивости</kwd><kwd>формы собственных колебаний</kwd><kwd>приведённые напряжения</kwd><kwd>кусочно-постоянное изменение параметров</kwd><kwd>минимальная материалоемкость</kwd></kwd-group><kwd-group xml:lang="en"><kwd>criterion</kwd><kwd>optimization</kwd><kwd>stability</kwd><kwd>frequency</kwd><kwd>critical force</kwd><kwd>stability loss</kwd><kwd>eigen-frequency mode</kwd><kwd>reduced stresses</kwd><kwd>piecewise constant parametric variation</kwd><kwd>minimum material consumption</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Abd Elrehim M.Z., Eid M.A., Sayed M.G. 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