concconcЖелезобетонные конструкцииReinforced concrete structures2949-16222949-1614Национальный исследовательский Московский государственный строительный университет10.22227/2949-1622.2024.2.43-53concconc-50Research ArticleКОМПЬЮТЕРНОЕ МОДЕЛИРОВАНИЕ В СТРОИТЕЛЬСТВЕCOMPUTER MODELLING IN CONSTRUCTIONСопротивление железобетонных рам прогрессирующему обрушению при больших прогибах ригелейResistance of Reinforced Concrete Frames to Progressive Collapse at Catenary Action of Beamshttps://orcid.org/0000-0001-5290-3429КолчуновВ. И.KolchunovV. I.

Виталий Иванович Колчунов, академик РААСН, профессор, доктор технических наук, профессор кафедры железобетонных и каменныхконструкций

129337, г. Москва, Ярославское шоссе, д. 26

ScopusID: 55534147800, ResearcherID: J-9152-2013

Vitaly I. Kolchunov, Full Member of RAACS, Professor, Doctor of Technical Sciences, Professor of the Department of Reinforced Concrete andMasonry Structures

26 Yaroslavskoe shosse, Moscow, 129337

Scopus: 55534147800, ResearcherID: J-9152-2013

asiorel@mail.ruhttps://orcid.org/0000-0002-6697-3388СавинС. Ю.SavinS. Yu.

Сергей Юрьевич Савин, кандидат технических наук, доцент, доцент кафедры железобетонных и каменных конструкций

129337, г. Москва, Ярославское шоссе, д. 26

Scopus: 57052453700, ResearcherID: M-8375-2016

Sergei Yu. Savin, Candidate of Technical Sciences, Associate Professor, Associate Professor of the Department of Reinforced Concrete and MasonryStructures

26 Yaroslavskoe shosse, Moscow, 129337

Scopus: 57052453700, ResearcherID: M-8375-2016

suwin@yandex.ruНациональный исследовательский Московский государственный строительный университет (НИУ МГСУ)РоссияMoscow State University of Civil Engineering (National Research University) (MGSU)Russian Federation202428062024624353Copyright © Колчунов В.И., Савин С.Ю., 20242024Колчунов В.И., Савин С.Ю.Kolchunov V.I., Savin S.Y.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.g-b-k.ru/jour/article/view/50

Исследуются особенности деформирования и разрушения железобетонной рамы при последовательной реализации арочного и цепного механизма сопротивления ригелей после удаления колонны среднего ряда. Для целей исследования выполнено численное моделирование с использованием объемных и стержневых конечно-элементных моделей.

The specific properties of deformation and failure of a reinforced concrete frame are investigated under sequential realization of arch and catenary action of beams after removal of the middle row column. Numerical modeling with the use of solid- and beam-type finite element models is performed for the purposes of the study. It was found that at the failure of the column of the second row the beam of the frame above the point of column removal transform to catenary structure, as evidenced by the relative deflection 1/29.8 (179 mm). The compressed concrete at the outer face of the corner column then collapsed, followed by the complete collapse of the frame. It is shown that the results of calculation performed with the use of the frame model based on solid finite elements were visually close to the results of numerical modeling with the use of bar finite element models before the onset of catenary action of the beams. For more correct modeling of reinforced concrete frame structures when catenary action of beams is realized in them. It is advisable to use specific modeling methods, such as accounting for additional rotations of sections at crack formation.

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The authors declare that there are no conflicts of interest present.