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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">20207</article-id><article-id pub-id-type="doi">10.22363/1815-5235-2018-14-5-414-426</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Buckling analysis</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Расчеты на устойчивость</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 and finite element modeling in the calculation and design of reinforcements of stretched elements by fiber-reinforced polymers based on high-strength fiber using adhesive joints</article-title><trans-title-group xml:lang="ru"><trans-title>Аналитическое и конечно-элементное моделирование при расчете и проектировании усилений растянутых элементов фиброармированными полимерами на основе высокопрочного волокна с применением клеевых соединений</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Danilov</surname><given-names>Aleksandr I</given-names></name><name xml:lang="ru"><surname>Данилов</surname><given-names>Александр Иванович</given-names></name></name-alternatives><bio xml:lang="en"><p>Cand. Sci. (Eng.), Assistant Professor, the Department of Metal and Timber Structures</p></bio><bio xml:lang="ru"><p>кандидат технических наук, доцент кафедры металлических и деревянных конструкций</p></bio><email>alenk904@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kalugin</surname><given-names>Ivan A</given-names></name><name xml:lang="ru"><surname>Калугин</surname><given-names>Иван Александрович</given-names></name></name-alternatives><bio xml:lang="en"><p>Bachelor, Construction Engineer</p></bio><bio xml:lang="ru"><p>бакалавр, инженерконструктор</p></bio><email>kalugin_93@bk.ru</email><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Moscow State University of Civil Engineering (National Research University)</institution></aff><aff><institution xml:lang="ru">Национальный исследовательский Московский государственный строительный университет</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">RKK Energy PJSC</institution></aff><aff><institution xml:lang="ru">ПАО РКК «Энергия»</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2018-12-15" publication-format="electronic"><day>15</day><month>12</month><year>2018</year></pub-date><volume>14</volume><issue>5</issue><issue-title xml:lang="en">VOL 14, NO5 (2018)</issue-title><issue-title xml:lang="ru">ТОМ 14, №5 (2018)</issue-title><fpage>414</fpage><lpage>426</lpage><history><date date-type="received" iso-8601-date="2018-12-21"><day>21</day><month>12</month><year>2018</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2018, Danilov A.I., Kalugin I.A.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2018, Данилов А.И., Калугин И.А.</copyright-statement><copyright-year>2018</copyright-year><copyright-holder xml:lang="en">Danilov A.I., Kalugin I.A.</copyright-holder><copyright-holder xml:lang="ru">Данилов А.И., Калугин И.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/">http://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.rudn.ru/structural-mechanics/article/view/20207">https://journals.rudn.ru/structural-mechanics/article/view/20207</self-uri><abstract xml:lang="en"><p>Subject . Analysis of applicability and effectiveness of various complexity level models in design of reinforcement of stretch elements by gluing on their surface high-strength fiber reinforced polymers (HSFRP). Research objectives. Determine the necessary level of complexity of the calculation model based on the comparison of calculation results obtained on models of various complexity within the elastic behavior of the reinforced element and analysis of features of its elastoplastic behavior in case of its overload. Materials and methods. Few relatively simple variants of HSFRP-reinforcement structures with application of four Finite Element Method (FEM) simulation models of varying complexity and an analytic approach. Plane and spatial Finite Element (FE) models with PC LIRA (SCAD) and FEMAP (NASTRAN) apply in considered series of numerical experiments. Comparative analysis of results of elastic FEM calculation based on various FE models with the results obtained using analytical expressions. A number of diagrams and tables represent the results of calculations. Nonlinear FEM analysis reveals some features of the reinforced elements response under extreme loads. Results. The effect of various factors on the bonded joint behavior observed, the equations and formulae for the analysis and design are applied, the analytical approach based numerical results well correspond with those obtained using FEM. A number of nonlinear FEM calculations discover some features of elastic-plastic response of joints. Conclusions. All the considered here FE models within the limits of elastic design are quite compatible mutually and with an approximate analytical approach as well. The least timeand effort-expensive for the stage of preliminary assessment of the various parameters effect on the glued joint behavior in the elastic design of the stretched elements reinforcement is an analytical approach allowing instantaneously obtain the resulting main components of stresses and forces in the components of joint to scroll through parameter values. FEM simulation for elastic calculation is expedient for verification of results. The simplified plain FEM simulation seems to be quite reliable here. In inelastic state of the reinforced element material yet, the features of its stress-strain distribution not observable in the elastic stage of its loading and requiring special attention and refined FEM simulation may dominate.</p></abstract><trans-abstract xml:lang="ru"><p>Предмет исследования. Анализ применимости и эффективности применения моделей различного уровня сложности для расчета и проектирования усиления растягиваемых элементов путем наклеивания на их поверхности полимеров на основе высокопрочных волокон. Цель исследования. Определение необходимого уровня сложности расчетной модели путем сравнения полученных на моделях различной сложности численных результатов в рамках упругого поведения материалов и анализ особенностей упругопластической работы в случае повышенной нагрузки. Материалы и методы. Рассматривается несколько относительно простых вариантов конструкции усиления высокопрочными волокнами с применением четырех конечно-элементных моделей (КЭ-моделей) различной сложности и аналитического подхода. В представленной серии численных экспериментов с применением ПК «ЛИРА» (СКАД) и FEMAP (NASTRAN) использовались двумерные и трехмерные КЭ-модели. Сравнение результатов упругого расчета различных КЭ-моделей с результатами, полученными с помощью аналитических выражений. Результаты расчета представлены в графической и табличной форме. Нелинейный анализ обнаруживает некоторые особенности поведения усиленных элементов при запредельных нагрузках. Результаты. Рассмотрено влияние различных факторов на работу клеевого соединения, применение уравнений и формул для расчета и проектирования. Результаты на основе аналитического подхода хорошо согласуются с результатами расчета методом конечных элементов (МКЭ). Расчеты МКЭ в физически нелинейной постановке обнаруживают некоторые особенности упругопластической работы соединений. Выводы. Все рассмотренные в статье КЭ-модели и приближенный аналитический подход в пределах упругого расчета дают близкие результаты. Наиболее экономичным по затратам усилий и времени на стадии предварительной оценки влияния различных параметров на работу узла в упругой стадии является аналитический подход. Применение МКЭ в упругой стадии целесообразно для уточнения результатов. Упрощенные плоские модели здесь достаточно надежны. Однако за пределами упругости материала усиливаемого элемента проявляются некоторые особенности НДС, не наблюдаемые в упругой стадии его нагружения и требующие особого внимания и уточненного расчета МКЭ.</p></trans-abstract><kwd-group xml:lang="en"><kwd>bonded connection</kwd><kwd>adhesive layer</kwd><kwd>shear strength</kwd><kwd>shear modulus</kwd><kwd>analytical solution</kwd><kwd>FEM</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>клеевое соединение</kwd><kwd>адгезионный слой</kwd><kwd>сдвиговая прочность</kwd><kwd>модуль сдвига</kwd><kwd>аналитическое решение</kwd><kwd>МКЭ</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">Ovchinnikov I.I., Ovchinnikov I.G., Chesnokov G.V., Tatiev D.A., Pokulaev D.V. (2014). Usileniye metallicheskich konstrukciy fibroarmirovannymi plastikami [Reinforcement of metal structures with fiber reinforced polymers]. Naukovedeniye, (3), 1-23. 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