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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">construction</journal-id><journal-title-group><journal-title xml:lang="ru">Строительство и реконструкция</journal-title><trans-title-group xml:lang="en"><trans-title>Building and Reconstruction</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2073-7416</issn><publisher><publisher-name>Орловский государственный университет имени И.С. Тургенева</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.33979/2073-7416-2024-114-4-42-55</article-id><article-id custom-type="elpub" pub-id-type="custom">construction-773</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>ТЕОРИЯ ИНЖЕНЕРНЫХ СООРУЖЕНИЙ. СТРОИТЕЛЬНЫЕ КОНСТРУКЦИИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>THEORY OF ENGINEERING STRUCTURES. BUILDING UNITS</subject></subj-group></article-categories><title-group><article-title>Алгоритм метода сил в форме метода контурных усилий</article-title><trans-title-group xml:lang="en"><trans-title>The force method algorithm in the form of a loop resultant method</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>Лалин</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Lalin</surname><given-names>V. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Лалин Владимир Владимирович, д-р техн. наук, проф. Высшей школы промышленно-гражданского и дорожного строительства</p><p>Санкт-Петербург</p></bio><bio xml:lang="en"><p>Vladimir Vladimirovich L., doctor of technical sciences, professor of the Higher School of Industrial, Civil and Road Construction of the Institute of Civil Engineering </p><p>Saint Petersburg</p></bio><email xlink:type="simple">vllalin@yandex.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>Лалина</surname><given-names>И. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Lalina</surname><given-names>I. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Лалина Ирина Игоревна, старший преподаватель Высшей школы промышленно-гражданского и дорожного строительства</p><p>Санкт-Петербур</p></bio><bio xml:lang="en"><p>Irina Igorevna L., senior lecturer of the Higher School of Industrial, Civil and Road Construction of the Institute of Civil Engineering </p><p>Saint Petersburg</p></bio><email xlink:type="simple">i.lalina@yandex.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>Нго</surname><given-names>Х. Х.</given-names></name><name name-style="western" xml:lang="en"><surname>Ngo</surname><given-names>H. H.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Нго Хыу Хиеу, аспирант Высшей школы промышленно-гражданского и дорожного строительства</p><p>Санкт-Петербург</p></bio><bio xml:lang="en"><p>Huu Hieu N., post-graduate student of the Higher School of Industrial, Civil and Road Construction of the Institute of Civil Engineering </p><p>Saint Petersburg</p></bio><email xlink:type="simple">hieupolytech1993@gmail.com</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>Ле</surname><given-names>Ч. М. Д.</given-names></name><name name-style="western" xml:lang="en"><surname>Le</surname><given-names>T. M. D.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ле Чан Минь Дат, канд. техн. наук кафедры строительства гидротехнических сооружений</p><p>Дананг</p></bio><bio xml:lang="en"><p>Tran Minh Dat L., PhD of the department of Hydraulic Structures Construction</p><p>Danang</p></bio><email xlink:type="simple">ltmdat@dut.udn.vn</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Санкт-Петербургский политехнический университет Петра Великого</institution></aff><aff xml:lang="en"><institution>Peter the Great Saint Petersburg Polytechnic University</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Университет науки и технологий – Университет Дананга (ДУТ-УД)</institution></aff><aff xml:lang="en"><institution>University of Science and Technology - The University of Da Nang (DUT-UD)</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>31</day><month>08</month><year>2024</year></pub-date><volume>0</volume><issue>4</issue><fpage>42</fpage><lpage>55</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Лалин В.В., Лалина И.И., Нго Х.H., Ле Ч., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Лалин В.В., Лалина И.И., Нго Х., Ле Ч.</copyright-holder><copyright-holder xml:lang="en">Lalin V.V., Lalina I.I., Ngo H.H., Le T.</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://construction.elpub.ru/jour/article/view/773">https://construction.elpub.ru/jour/article/view/773</self-uri><abstract><p>Объектом исследования является расчет статически неопределимых стержневых систем при температурных воздействиях. Цель данной работы - предложить простой алгоритм расчета стержневых конструкций с использованием идеи метода контурных усилий. Базовые контуры определяются путем разделения данной конструкции на статически неопределимые контуры вместо традиционного подхода к учету лишних неизвестных метода сил во всей конструкции. Предлагаемый подход позволяет упростить расчет благодаря использованию условий совместности контурных деформаций и автоматическому выбору в качестве лишних неизвестных - усилий для каждого базового контура. Преимущество представленного подхода заключается в простой структуре матрицы системы уравнений – матрицы податливости конструкции: расположение нулевых и ненулевых блоков в которой зависит только от нумерации контуров. Построены в явном виде матрицы податливости элементов-стержней для произвольной системы координат, изложен способ построения матриц совместности деформаций для произвольных контуров, разработан простой алгоритм метода контурных усилий. Приведены некоторые численные примеры для более подробного описания представленного алгоритма.</p></abstract><trans-abstract xml:lang="en"><p>The object of research is the behavior of statically indeterminate frames under the influence of temperature. The purpose of this work is to suggest a simple algorithm for the analysis of framed structures by using the original idea of the loop resultant method. This basic loop is generated by splitting the given structure into statically indeterminate loops instead of the conventional approach of treating the redundant forces in the whole structure. The current approach allows to simplify the calculation, thanks for using the loop compatibility conditions and by dealing with the primary unknowns for each basic loop. The advantage of this presented approach is in simple structure of a system flexibility matrix: the location of zero and non-zero blocks depend only on the numbering of loops. Different types of flexibility matrices of the element-rods are established; it is shown how to build the compatibility matrix for any loops with or without hinges; and the simple algorithm of the loop resultant method is developed. Some numerical examples are performed to describe the presented algorithm in more detail.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>метод сил</kwd><kwd>метод контурных усилий</kwd><kwd>матрица податливости</kwd><kwd>матрица совместности</kwd><kwd>стержневые системы</kwd></kwd-group><kwd-group xml:lang="en"><kwd>force method</kwd><kwd>loop method</kwd><kwd>flexibility matrix</kwd><kwd>compatibility matrix</kwd><kwd>rod systems</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">Koohestani K. 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