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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">46937</article-id><article-id pub-id-type="doi">10.22363/1815-5235-2025-21-4-334-345</article-id><article-id pub-id-type="edn">CIVXMF</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Analysis and design of building structures</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Расчет и проектирование строительных конструкций</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">Design Wind Directions in Bearing Capacity Assessment of Triangular Antenna-Mast Structures</article-title><trans-title-group xml:lang="ru"><trans-title>Расчетные направления ветра при экспертизе несущей способности трехгранных антенно-мачтовых сооружений</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0006-7167-0652</contrib-id><contrib-id contrib-id-type="spin">4203-4240</contrib-id><name-alternatives><name xml:lang="en"><surname>Markina</surname><given-names>Yulia D.</given-names></name><name xml:lang="ru"><surname>Маркина</surname><given-names>Юлия Дмитриевна</given-names></name></name-alternatives><bio xml:lang="en"><p>Senior lecturer, Department of Theory of Structures and Technical Mechanics</p></bio><bio xml:lang="ru"><p>старший преподаватель кафедры теории сооружений и технической механики</p></bio><email>poluektoff@bk.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Nizhny Novgorod State University of Architecture and Civil Engineering</institution></aff><aff><institution xml:lang="ru">Нижегородский государственный архитектурно-строительный университет</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-11-05" publication-format="electronic"><day>05</day><month>11</month><year>2025</year></pub-date><volume>21</volume><issue>4</issue><issue-title xml:lang="en">VOL 21, NO4 (2025)</issue-title><issue-title xml:lang="ru">ТОМ 21, №4 (2025)</issue-title><fpage>334</fpage><lpage>345</lpage><history><date date-type="received" iso-8601-date="2025-11-05"><day>05</day><month>11</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Markina Y.D.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Маркина Ю.Д.</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Markina Y.D.</copyright-holder><copyright-holder xml:lang="ru">Маркина Ю.Д.</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/">https://creativecommons.org/licenses/by-nc/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.rudn.ru/structural-mechanics/article/view/46937">https://journals.rudn.ru/structural-mechanics/article/view/46937</self-uri><abstract xml:lang="en"><p>The influence of wind direction on the stress-strain state of triangular lattice antenna-mast structures with heights ranging from 40 to 72 meters is examined. The study focuses on five real-world steel towers of varying geometries, located in the Kaluga, Tula, and Ryazan Regions of the Russian Federation. Structural analysis was performed using the finite element method in the SCAD Office software environment. The investigation involved pairwise comparisons of internal forces in key structural elements (chords, diagonals, and horizontal braces) under two wind directions: the standard (perpendicular to the windward face of the tower) and along one of the faces, which is not considered in national design codes. It was found that wind acting along a tower face can, in several cases, induce internal forces that exceed those under the standard direction by 20-60%. Distinct patterns of force redistribution along the tower height and spatial torsional effects were also observed. The results demonstrate the necessity of expanding design scenarios for tower structures to include non-standard wind directions, which are currently overlooked in engineering practice. This study fills a research gap and contributes to the development of improved design methods and regulatory frameworks for lattice antenna-mast structures.</p></abstract><trans-abstract xml:lang="ru"><p>Рассмотрено влияние направления ветровой нагрузки на напряженно-деформированное состояние трехгранных решетчатых антенно-мачтовых сооружений высотой от 40 до 72 м. Объектами исследования выступают пять реально эксплуатируемых металлических башен различной геометрии, установленных в различных областях Российской Федерации. Расчеты выполнены методом конечно-элементного моделирования с использованием программного комплекса SCAD Office. В рамках исследования проведено сравнение усилий в элементах конструкций (поясах, раскосах, распорках) при действии ветра в двух направлениях: нормативном (перпендикулярно наветренной грани башни) и вдоль одной из граней, не предусмотренном национальными нормативами. Установлено, что при воздействии ветра вдоль грани в ряде случаев возникают усилия, превышающие значения при направлении перпендикулярно наветренной грани башни на 20-60 % и более. Зафиксированы характерные изменения в распределении усилий по высоте и наличие пространственного закручивания конструкции. Полученные данные подтверждают необходимость расширения расчетных сценариев для башенных сооружений и учитывать направления ветрового воздействия, ранее не рассматриваемые в инженерной практике. Представленные результаты восполняют пробел в научной литературе и могут быть использованы для совершенствования нормативной базы и методов проектирования решетчатых антенно-мачтовых сооружений.</p></trans-abstract><kwd-group xml:lang="en"><kwd>antenna-mast structures</kwd><kwd>FEM</kwd><kwd>stress-strain state</kwd><kwd>calculation of bearing capacity</kwd><kwd>wind load</kwd><kwd>cellular communication support</kwd><kwd>steel tower</kwd><kwd>triangular lattice structure</kwd><kwd>design standards</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>АМС</kwd><kwd>МКЭ</kwd><kwd>НДС</kwd><kwd>РНС</kwd><kwd>ветровая нагрузка</kwd><kwd>опора сотовой связи</kwd><kwd>стальная башня</kwd><kwd>трехгранная решетчатая конструкция</kwd><kwd>нормы проектирования</kwd></kwd-group><funding-group/></article-meta><fn-group/></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Pichugin S. Makhinko A. Probabilistic model of wind load maxima. 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