<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE root>
<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">52524</article-id><article-id pub-id-type="doi">10.22363/1815-5235-2026-22-3-283-292</article-id><article-id pub-id-type="edn">LJRNOJ</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">Estimation of Dimensions of the Soil Body Fragment in Numerical Modeling of a T-Connection of Cylindrical Shells</article-title><trans-title-group xml:lang="ru"><trans-title>Оценка размеров фрагмента грунтового массива при численном моделировании тройникового соединения цилиндрических оболочек</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-3241-0683</contrib-id><contrib-id contrib-id-type="spin">9390-7610</contrib-id><name-alternatives><name xml:lang="en"><surname>Kosytsyn</surname><given-names>Sergey B.</given-names></name><name xml:lang="ru"><surname>Косицын</surname><given-names>Сергей Борисович</given-names></name></name-alternatives><bio xml:lang="en"><p>Advisor of the Russian Academy of Architecture and Construction Sciences (RAASN), Doctor of Technical Sciences, Professor of Department of Theoretical Mechanics</p></bio><bio xml:lang="ru"><p>советник РААСН, доктор технических наук, профессор кафедры теоретической механики</p></bio><email>kositsyn-s@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9467-5791</contrib-id><contrib-id contrib-id-type="spin">8428-4636</contrib-id><name-alternatives><name xml:lang="en"><surname>Akulich</surname><given-names>Vladimir Yu.</given-names></name><name xml:lang="ru"><surname>Акулич</surname><given-names>Владимир Юрьевич</given-names></name></name-alternatives><bio xml:lang="en"><p>Сandidate of Technical Sciences, Associate Professor of Department of Theoretical Mechanics</p></bio><bio xml:lang="ru"><p>кандидат технических наук, доцент кафедры теоретической механики</p></bio><email>vladimir.akulich@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0003-8268-7482</contrib-id><name-alternatives><name xml:lang="en"><surname>Osetinskii</surname><given-names>Leonid N.</given-names></name><name xml:lang="ru"><surname>Осетинский</surname><given-names>Леонид Николаевич</given-names></name></name-alternatives><bio xml:lang="en"><p>Student, Technician at the “Heat and Mass Transfer in Constructionˮ Scientific Research Center</p></bio><bio xml:lang="ru"><p>студент, техник научно-исследовательского центра «Тепло- и массообмен в строительстве»</p></bio><email>leonid.osetinsckij@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Russian University of Transport</institution></aff><aff><institution xml:lang="ru">Российский университет транспорта</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2026-09-30" publication-format="electronic"><day>30</day><month>09</month><year>2026</year></pub-date><volume>22</volume><issue>3</issue><issue-title xml:lang="en">VOL 22, NO2 (2025)</issue-title><issue-title xml:lang="ru">ТОМ 22, №2 (2025)</issue-title><fpage>283</fpage><lpage>292</lpage><history><date date-type="received" iso-8601-date="2026-09-30"><day>30</day><month>09</month><year>2026</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2026, Kosytsyn S.B., Akulich V.Y., Osetinskii L.N.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2026, Косицын С.Б., Акулич В.Ю., Осетинский Л.Н.</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="en">Kosytsyn S.B., Akulich V.Y., Osetinskii L.N.</copyright-holder><copyright-holder xml:lang="ru">Косицын С.Б., Акулич В.Ю., Осетинский Л.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/">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/52524">https://journals.rudn.ru/structural-mechanics/article/view/52524</self-uri><abstract xml:lang="en"><p>A numerical simulation of the three-dimensional “shell - soil” system was performed, comprising a T-connection of cylindrical shells and the surrounding soil body, using contact elements to describe the gap between the structure and the soil. The study was carried out for soil fragments of various widths in order to evaluate their influence on the magnitude and shape of the surface settlement trough. Eight models were considered, in which the distance L from the edges of the main and adjoining shells to the lateral faces of the soil body varied from 1D to 8D in steps of D , where D is the diameter of the main shell. The surrounding soil body was modeled with three-dimensional finite elements (SOLID186, SOLID187), the cylindrical shell - with shell elements (SHELL181); the soil behavior was described by the elastic-plastic Mohr-Coulomb model. Families of surface settlement trough curves were obtained in the transverse and longitudinal directions relative to the axis of the adjoining shell. It was established that for the soil body width from 1D to 5D both the settlement magnitudes and the shape of the settlement trough change noticeably, whereas with a further increase of the model domain ( L ≥ 5D ) the change in the shape and depth of the trough becomes insignificant. Based on the stress analysis of the system, it is recommended for engineering calculations to adopt a soil body width of L ≥ 5D , with L = 5D being preferable, providing sufficient accuracy of settlement prediction without an excessive increase in the number of finite elements. The obtained results help maintain a balance between computational speed and reliability of the mathematical modeling, which is especially important in multivariate analysis.</p></abstract><trans-abstract xml:lang="ru"><p>Выполнено численное моделирование пространственной системы «оболочка - грунтовый массив», включающей тройниковое соединение цилиндрических оболочек и прилегающий грунтовый массив, с использованием контактных элементов для описания зазора между конструкцией и грунтом. Исследование проведено для фрагментов массива различной ширины с целью оценки их влияния на величину и форму мульды осадки земной поверхности. Рассмотрены восемь расчетных моделей, в которых расстояние L от краев основной и примыкающей оболочек до боковых торцов массива изменялось в диапазоне от 1 D до 8 D с шагом D , где D - диаметр основной оболочки. Окружающий массив моделировался трехмерными конечными элементами (SOLID186, SOLID187), цилиндрическая оболочка моделировалась оболочечными элементами (SHELL181); поведение грунта описано упругопластической моделью Мора - Кулона. Получены семейства кривых мульд осадок поверхности массива в поперечном и продольном направлениях к оси примыкающей оболочки. Установлено, что при ширине расчетного массива от 1 D до 5 D заметно изменяются как величины осадок, так и форма мульды оседания, а при дальнейшем увеличении размеров расчетной области ( L ≥ 5 D ) изменение формы и глубины мульды становится незначительным. На основе анализа напряженно-деформированного состояния системы для инженерных расчетов рекомендовано принимать ширину массива L ≥ 5 D , при этом предпочтительным является значение L = 5 D , обеспечивающее достаточную точность прогнозирования осадки без чрезмерного увеличения числа конечных элементов. Полученные результаты позволяют поддерживать баланс между скоростью расчета и достоверностью математического моделирования, что особенно важно при многовариантном анализе.</p></trans-abstract><kwd-group xml:lang="en"><kwd>structural mechanics</kwd><kwd>finite element method</kwd><kwd>surface settlement</kwd><kwd>underground structures</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>строительная механика</kwd><kwd>метод конечных элементов</kwd><kwd>осадка поверхности</kwd><kwd>подземные сооружения</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Работа выполнена в рамках государственного задания номер 103-00001-26-00 от 15.01.2026 г.</institution></institution-wrap><institution-wrap><institution xml:lang="en">The work was performed within the framework of the state assignment number 103-00001-26-00 dated 01/15/2026.</institution></institution-wrap></funding-source></award-group></funding-group></article-meta><fn-group/></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Li J, Shi Z, Liu L. A scaled boundary finite element method for static and dynamic analyses of cylindrical shells. Engineering Analysis with Boundary Elements. 2019;98:217–231. https://doi.org/10.1016/j.enganabound.2018.10.024</mixed-citation><mixed-citation xml:lang="ru">Li J., Shi Z., Liu L. A scaled boundary finite element method for static and dynamic analyses of cylindrical shells // Engineering Analysis with Boundary Elements. 2019. Vol. 98. P. 217-231. https://doi.org/10.1016/j.enganabound.2018.10.024</mixed-citation></citation-alternatives></ref><ref id="B2"><label>2.</label><citation-alternatives><mixed-citation xml:lang="en">Zang Q, Liu J, Ye W, Yang F, Pang R, Lin G. High-performance bending and buckling analyses of cylindrical shells resting on elastic foundation using isogeometric scaled boundary finite element method. European Journal of Mechanics — A/Solids. 2023;100:105013. https://doi.org/10.1016/j.euromechsol.2023.105013 EDN: YHVYJC</mixed-citation><mixed-citation xml:lang="ru">Zang Q., Liu J., Ye W., Yang F., Pang R., Lin G. High-performance bending and buckling analyses of cylindrical shells resting on elastic foundation using isogeometric scaled boundary finite element method // European Journal of Mechanics - A/Solids. 2023. Vol. 100. Article no. 105013. https://doi.org/10.1016/j.euromechsol.2023.105013 EDN: YHVYJC</mixed-citation></citation-alternatives></ref><ref id="B3"><label>3.</label><citation-alternatives><mixed-citation xml:lang="en">Niu G, He X, Xu H, Dai S. Tunnelling-induced ground surface settlement: A comprehensive review with particular attention to artificial intelligence technologies. Natural Hazards Research. 2024;4(1):148–168. https://doi.org/10.1016/j.nhres.2023.11.002 EDN: SFZQPC</mixed-citation><mixed-citation xml:lang="ru">Niu G., He X., Xu H., Dai S. Tunnelling-induced ground surface settlement: A comprehensive review with particular attention to artificial intelligence technologies // Natural Hazards Research. 2024. Vol. 4. No. 1. P. 148-168. https://doi.org/10.1016/j.nhres.2023.11.002 EDN: SFZQPC</mixed-citation></citation-alternatives></ref><ref id="B4"><label>4.</label><citation-alternatives><mixed-citation xml:lang="en">Huat Ch.Yu, Armaghani D.Ja, Lai SH, Motaghedi H, Asteris PG, Fakharin P. Analyzing surface settlement factorsin single and twin tunnels: A review study. Journal of Engineering Research. 2025;13(3):2096–2108. https://doi.org/10.1016/j.jer.2024.05.009 EDN: QHYEWN</mixed-citation><mixed-citation xml:lang="ru">Huat Ch.Yu., Armaghani D.Ja., Lai S.H., Motaghedi H., Asteris P.G., Fakharin P. Analyzing surface settlement factors in single and twin tunnels: A review study // Journal of Engineering Research. 2025. Vol. 13. Issue 3. P. 2096-2108. https://doi.org/10.1016/j.jer.2024.05.009 EDN: QHYEWN</mixed-citation></citation-alternatives></ref><ref id="B5"><label>5.</label><citation-alternatives><mixed-citation xml:lang="en">Ahmed KS, Sharmin J, Ansary MA. Numerical investigation of tunneling induced surface movement: A case study of MRT line 1, Dhaka. Underground Space. 2023;12:116–136. https://doi.org/10.1016/j.undsp.2023.02.008</mixed-citation><mixed-citation xml:lang="ru">Ahmed K.S., Sharmin J., Ansary M.A. Numerical investigation of tunneling induced surface movement: A case study of MRT line 1, Dhaka // Underground Space. 2023. Vol. 12. P. 116-136. https://doi.org/10.1016/j.undsp.2023.02.008 EDN: VOOZJH</mixed-citation></citation-alternatives></ref><ref id="B6"><label>6.</label><citation-alternatives><mixed-citation xml:lang="en">Wang X, Wang Y, Yang Y, Fang Y, Zhuo B. Distribution characteristics and spatial correlation analysis of defects in in-service metro shield tunnels: A case study. Tunnelling and Underground Space Technology. 2025. https://doi.org/10.1016/j.tust.2025.107397</mixed-citation><mixed-citation xml:lang="ru">Wang X., Wang Yu., Yang Yi., Fang Y., Zhuo B. Distribution characteristics and spatial correlation analysis of defects in in-service metro shield tunnels: A case study // Tunnelling and Underground Space Technology. 2025. https://doi.org/10.1016/j.tust.2025.107397 EDN: KIWCMI</mixed-citation></citation-alternatives></ref><ref id="B7"><label>7.</label><citation-alternatives><mixed-citation xml:lang="en">Yao Y, Fang Y, He C, Xu G, Yao Z, Hu X. Spatial motion patterns and force transmission characteristics of muck particles in EPB shield tunneling: An FDM–DEM coupling analysis. Underground Space. 2025. https://doi.org/10.1016/j.undsp.2025.05.005</mixed-citation><mixed-citation xml:lang="ru">Yao Y., Fang Y., He C., Xu G., Yao Z., Hu X. Spatial motion patterns and force transmission characteristics of muck particles in EPB shield tunneling: An FDM-DEM coupling analysis // Underground Space. 2025. https://doi.org/10.1016/j.undsp.2025.05.005 EDN: HECKIX</mixed-citation></citation-alternatives></ref><ref id="B8"><label>8.</label><citation-alternatives><mixed-citation xml:lang="en">Kosytsyn SB, Akulich VYu. Numerical stress analysis of orthogonally intersecting cylindrical shells interacting with soil considering stages of construction. Structural Mechanics of Engineering Constructions and Buildings. 2024;20(4):303–310. (In Russ.) https://doi.org/10.22363/1815-5235-2024-20-4-303-310 EDN: TVXXYV</mixed-citation><mixed-citation xml:lang="ru">Косицын С.Б., Акулич В.Ю. Численный анализ НДС ортогонально пересекающихся цилиндрических оболочек, взаимодействующих с основанием, с учетом изменения расчетной модели во времени // Строительная механика инженерных конструкций и сооружений. 2024. Т. 20. № 4. С. 303-310. https://doi.org/10.22363/1815-5235-2024-20-4-303-310 EDN: TVXXYV</mixed-citation></citation-alternatives></ref><ref id="B9"><label>9.</label><citation-alternatives><mixed-citation xml:lang="en">Kosytsyn SB, Akulich VYu. Three-dimensional analysis of t-connections of cylindrical shells considering stages of construction. Structural Mechanics of Engineering Constructions and Buildings. (In Russ.) 2025;21(3):181–191. https://doi.org/10.22363/1815-5235-2025-21-3 EDN: SSMRFB</mixed-citation><mixed-citation xml:lang="ru">Косицын С.Б., Акулич В.Ю. Пространственный расчет тройниковых соединений цилиндрических оболочек с учетом изменения расчетной модели во времени // Строительная механика инженерных конструкций и сооружений. 2025. Т. 21. № 3. С. 181-191. https://doi.org/10.22363/1815-5235-2025-21-3 EDN: SSMRFB</mixed-citation></citation-alternatives></ref><ref id="B10"><label>10.</label><citation-alternatives><mixed-citation xml:lang="en">Akimov PA, Mozgaleva ML. B-spline wavelet discrete-continual finite element method for the local solution to the two-dimensional problem of the theory of elasticity. Monthly Journal on Construction and Architecture. 2022;17(1):32–41. (In Russ.) https://doi.org/10.22227/1997-0935.2022.1.32-41 EDN: IYPOKW</mixed-citation><mixed-citation xml:lang="ru">Акимов П.А., Мозгалева М.Л. Вейвлет-реализация дискретно-континуального метода конечных элементов на основе B-сплайнов для локального решения двумерной задачи теории упругости // Вестник МГСУ. 2022. Т. 17. № 1. С. 32-41. https://doi.org/10.22227/1997-0935.2022.1.32-41 EDN: IYPOKW</mixed-citation></citation-alternatives></ref><ref id="B11"><label>11.</label><citation-alternatives><mixed-citation xml:lang="en">Mangushev RA, Dyakonov IP, Polunin VM, Bashmakov IB, Paskacheva DA. Mathematical modeling of the operation of plate elements when working together with a soil base in conditions of flat deformation. Housing Construction. 2024;(11):37–46. (In Russ.) https://doi.org/10.31659/0044-4472-2024-11-37-46 EDN: BYRBSC</mixed-citation><mixed-citation xml:lang="ru">Мангушев Р.А., Дьяконов И.П., Полунин В.М., Башмаков И.Б., Паскачева Д.А. Математическое моделирование работы плитных элементов при совместной работе с грунтовым основанием в условиях плоской деформации // Жилищное строительство. 2024. № 11. С. 37-46. https://doi.org/10.31659/0044-4472-2024-11-37-46 EDN: BYRBSC</mixed-citation></citation-alternatives></ref><ref id="B12"><label>12.</label><citation-alternatives><mixed-citation xml:lang="en">Klochkov YuV, Dzhabrailov ASh, Ishchanov TR, Marchenko SS, Andreev AS, Klochkov MYu. Finite element calculation of an elliptical cylinder in a geometrically nonlinear formulation using the vector form of the interpolation procedure. PNRPU Mechanics Bulletin. 2022;(1):58–71. (In Russ.) https://doi.org/10.15593/perm.mech/2022.1.06 EDN: MYVJBF</mixed-citation><mixed-citation xml:lang="ru">Клочков Ю.В., Джабраилов А.Ш., Ищанов Т.Р., Марченко С.С., Андреев А.С., Клочков М.Ю. Конечно-элементный расчет эллиптического цилиндра в геометрически нелинейной постановке при использовании векторной формы интерполяционной процедуры // Вестник Пермского национального исследовательского политехнического университета. Механика. 2022. № 1. С. 58-71. https://doi.org/10.15593/perm.mech/2022.1.06 EDN: MYVJBF</mixed-citation></citation-alternatives></ref><ref id="B13"><label>13.</label><citation-alternatives><mixed-citation xml:lang="en">Lalin VV, Le TKCh. Calculation of building structures for several dynamic effects with a static accounting of higher forms of oscillation. Structural Mechanics of Engineering Constructions and Buildings. 2020;16(3):171–178. (In Russ.) https://doi.org/10.22363/1815-5235-2020-16-3-171-178 EDN: VSEGWP</mixed-citation><mixed-citation xml:lang="ru">Лалин В.В., Ле Т.К.Ч. Расчет строительных конструкций на несколько динамических воздействий со статическим учетом высших форм колебаний // Строительная механика инженерных конструкций и сооружений. 2020. Т. 16. № 3. С. 171-178. https://doi.org/10.22363/1815-5235-2020-16-3-171-178 EDN: VSEGWP</mixed-citation></citation-alternatives></ref><ref id="B14"><label>14.</label><citation-alternatives><mixed-citation xml:lang="en">Mozgaleva ML, Akimov PA. Localization of solution of the problem for Poisson’s equation with the use of B-spline discrete-continual finite element method. International Journal for Computational Civil and Structural Engineering. 2021;17(3):157–172. https://doi.org/10.22337/2587-9618-2021-17-3-157-172 EDN: MFCJOI</mixed-citation><mixed-citation xml:lang="ru">Mozgaleva M.L., Akimov P.A. Localization of solution of the problem for Poisson’s equation with the use ofB-spline discrete-continual finite element method // International Journal for Computational Civil and Structural Engineering. 2021. Vol. 17. No. 3. P. 157-172. https://doi.org/10.22337/2587-9618-2021-17-3-157-172 EDN: MFCJOI</mixed-citation></citation-alternatives></ref><ref id="B15"><label>15.</label><citation-alternatives><mixed-citation xml:lang="en">Yankovsky AP. The refined model of viscoelastic-plastic deformation of reinforced cylindrical shells. PNRPU Mechanics Bulletin. 2020;(1):138–149. (In Russ.) https://doi.org/10.15593/perm.mech/2020.1.11 EDN: GEUKCU</mixed-citation><mixed-citation xml:lang="ru">Янковский А.П. Уточненная модель вязкоупругопластического деформирования армированных цилиндрических оболочек // Вестник Пермского национального исследовательского политехнического университета. Механика. 2020. № 1. С. 138-149. https://doi.org/10.15593/perm.mech/2020.1.11. EDN: GEUKCU</mixed-citation></citation-alternatives></ref><ref id="B16"><label>16.</label><citation-alternatives><mixed-citation xml:lang="en">Zveryaev EM, Pyhtyn AV, Hoa VD. Spatial problem for rectangular elastic plate. Structural Mechanics and Analysis of Constructions. 2021;4(297):2–11. (In Russ.) https://doi.org/10.37538/0039-2383.2021.4.2.11 EDN: SUBZUM</mixed-citation><mixed-citation xml:lang="ru">Зверяев Е.М., Пыхтин А.В., Хоа В.Д. Пространственная задача для прямоугольной упругой пластины // Строительная механика и расчет сооружений. 2021. № 4 (297). С. 2-11. https://doi.org/10.37538/0039-2383.2021.4.2.11 EDN: SUBZUM</mixed-citation></citation-alternatives></ref><ref id="B17"><label>17.</label><citation-alternatives><mixed-citation xml:lang="en">Bakulin V.N. Model for analysis of the stress-strain state of three-layer cylindrical shells with rectangular cutouts. Mechanics of Solids. 2022;57(1):102–110. https://doi.org/10.3103/S0025654422010095 EDN: EDN: KXXBKL</mixed-citation><mixed-citation xml:lang="ru">Бакулин В.Н. Модель для анализа напряженно-деформированного состояния трехслойных цилиндрических оболочек с прямоугольными вырезами // Известия Российской академии наук. Механика твердого тела. 2022. № 1. С. 122-132. https://doi.org/10.31857/S0572329922010032 EDN: UFTFXV</mixed-citation></citation-alternatives></ref></ref-list></back></article>
