Open AccessA NEW METHOD FPR ASSESSING THE RESISTANCE OF A REINFORCED CONCRETE COLUMN WITH A CIRCULAR CROSS SECTION
Author(s) -
Nikolay A. Ilyin,
Ильин Николай Алексеевич,
Sergey S. Mordovskiy,
Мордовский Сергей Сергеевич,
Yulia A. Potatyeva,
Потатуева Юлия Александровна,
Ksenia V. Rezyapkina,
Резяпкина Ксения Витальевна
Publication year - 2020
Publication title -
gradostroitelʹstvo i arhitektura
Language(s) - English
Resource type - Journals
eISSN - 2782-2109
pISSN - 2542-0151
DOI - 10.17673/vestnik.2020.03.2
Subject(s) - column (typography) , structural engineering , cross section (physics) , reinforced concrete , bearing capacity , reinforced concrete column , materials science , engineering , physics , quantum mechanics , connection (principal bundle)
The developed method for assessing fi re resistance relates to the fi eld of fi re safety of buildings and structures and can be used to classify a reinforced concrete column of circular cross-section according to fi re resistance indicators. The essence of the proposed solution is to assess the design limit of fi re resistance of a reinforced concrete column of circular cross-section for the loss of bearing capacity under fi re conditions according to a set of single quality indicators without direct testing. The description of the process of resistance of a reinforced concrete column to fi re impact is presented by a mathematical relationship that takes into account the dimensions of the cross-section of the column, the degree of reinforcement, the intensity of force stresses, the normative strength of concrete to the resistance to axial compression and the rate of thermal diff usion of concrete. To determine the fi re resistance limit of a reinforced concrete column with a circular cross-section, an analytical expression that combines all the described indicators is proposed. The proposed method for determining fi re resistance refers to a thermal strength problem, which makes it possible to determine the fi re resistance of a reinforced concrete column of circular cross-section without full-scale fi re exposure, and reduces economic costs.