constructionСтроительство и реконструкцияBuilding and Reconstruction2073-7416Орловский государственный университет имени И.С. Тургенева10.33979/2073-7416-2025-117-1-40-47construction-850Research ArticleТЕОРИЯ ИНЖЕНЕРНЫХ СООРУЖЕНИЙ. СТРОИТЕЛЬНЫЕ КОНСТРУКЦИИTHEORY OF ENGINEERING STRUCTURES. BUILDING UNITSСцепление коррозионно-поврежденных железобетонных элементов при огневом воздействииBonding of corrosion-damaged reinforced concrete elements in case of fire impactТамразянА. Г.TamrazyanA. G.

Тамразян Ашот Георгиевич, Д-р техн. наук, проф., заведующий кафедрой железобетонных и каменных конструкций 

г. Москва 

Tamrazyan Ashot Georgievich, Doctor in tech. sc., Prof, Head of the Department of Reinforced Concrete and Masonry Structures

Moscow  

tamrazian@mail.ruБарякД. С.BaryakD. S.

Баряк Дмитрий Сергеевич, Аспирант кафедры железобетонных и каменных конструкций 

г. Москва 

Baryak Dmitry Sergeevich, Postgraduate student of the Department of Reinforced Concrete and Masonry Structures 

Moscow 

baryakd@gmail.comФГБОУ ВО «Национальный исследовательский Московский государственный строительный университет»Federal State Budgetary Educational Institution of Higher Education "National Research Moscow State University of Civil Engineering" (NRU MGSU)202510032025114047Copyright © Тамразян А.Г., Баряк Д.С., 20252025Тамразян А.Г., Баряк Д.С.Tamrazyan A.G., Baryak D.S.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://construction.elpub.ru/jour/article/view/850

Рассматривается изменение сцепления арматуры с бетоном в железобетонных конструкциях при одновременном воздействии коррозии и высоких температур. Анализ выполнен с использованием аналитических моделей и данных нормативной литературы для оценки изменений прочностных характеристик арматуры и бетона в условиях повышенной температуры и коррозионных повреждений. Учтены термические и коррозионные воздействия, влияющие на снижение сцепления арматуры, прочности материалов, а также на внутренние напряжения, возникающие из-за различий в коэффициентах теплового расширения, стали и бетона. Показано, что при значительных температурах и высоком уровне коррозии сцепление арматуры с бетоном существенно снижается. Приведенные модели и расчетные зависимости позволяют выполнять предварительную оценку надежности железобетонных конструкций и их огнестойкости в условиях коррозионного воздействия.

This paper examines the bond strength between reinforcement and concrete in reinforced concrete structures under combined effects of corrosion and high temperatures. The analysis employs analytical models and regulatory data to evaluate changes in the strength characteristics of reinforcement and concrete under elevated temperatures and corrosion damage. Thermal and corrosion effects influencing bond strength reduction, material strength degradation, and internal stresses due to differences in thermal expansion coefficients of steel and concrete were taken into account. Results indicate that under high temperatures and significant corrosion levels, bond strength between reinforcement and concrete decreases considerably. The presented models and calculation dependencies allow for a preliminary assessment of the reliability and fire resistance of reinforced concrete structures under corrosion conditions.

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