Major Issues of Theory and Practice of Fire Resistance of Reinforced Concrete Structures and Buildings

Fomin, Stanislav; Bondarenko, Yuriy; Butenko, Serhii; Koliesnikov, Serhii

doi:10.4028/www.scientific.net/msf.1006.136

Cited by 2 publications

(1 citation statement)

References 3 publications

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“…The fire resistance calculation of reinforced concrete elements as one of the directions of modern structural engineering is quite developed in applied terms -many experimental applied studies have been performed [1], there are certain observations based on real fires [2], but there is no sufficient theoretical and mathematical apparatus [3].…”

Section: Introductionmentioning

confidence: 99%

Basics of the advanced calculating method the fire resistance of the section of an eccentrically compressed reinforced concrete element

Butenko,

Iakymenko,

Koliesnikov

2024

IOP Conf. Ser.: Earth Environ. Sci.

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The paper considers the issue of some special features in fire resistance calculations of an eccentrically compressed reinforced concrete element and propose new approach for calculating the fire resistance, based on the advanced formula of the stress-strain diagram for concrete depending on temperature. It has been shown that due to the change of the temperature field during a fire a change in the strength and deformation characteristics of concrete and reinforcing steel occurs as well, which, accordingly, leads to a change in eccentricity over time, that is, the eccentricity value is variable and depends both on the internal characteristics of the element (class of concrete, reinforcement) and from external factors (type of fire, time, loading). Formulas for calculating the eccentricity of an eccentrically compressed rod reinforced concrete element for a specific fixed moment of time are presented. There are also given the coordinates of the cross-section core and the center of central compression. It is possible to obtain the dynamics of changes in the eccentricity of a compressed rod reinforced concrete element during the time of the fire by doing such calculations for certain moments of time.

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Section: Introductionmentioning

confidence: 99%

Basics of the advanced calculating method the fire resistance of the section of an eccentrically compressed reinforced concrete element

Butenko,

Iakymenko,

Koliesnikov

2024

IOP Conf. Ser.: Earth Environ. Sci.

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Scientific approach to fire resistance calculation of reinforced concrete beams and columns

Fomin

Bondarenko

Butenko

et al. 2021

IOP Conf. Ser.: Mater. Sci. Eng.

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Problems related to the fire resistance calculation of reinforced concrete beams and columns from a scientific point of view when using new design standards are considered. The first problem is the insufficient development of improved calculation methods, exactly their absence. Only basic principles and requirements are formulated for them. This article presents the principles and sequence of calculation. The second problem is the lack of an accurate mathematical nonlinear compression model of the stress-strain diagram for concrete. The article explains the imperfection of the existing one, the need to create a new model and presents the basic requirements that such a mathematical model must meet. The third problem of the discussed ones is the erroneous values of the relative ultimate deformation of concrete. The principle of formation of values of relative limiting deformation of concrete is specified and proceeding from it the additional requirement for mathematical nonlinear model of compression of the diagram of stress - strain for concrete is specified.

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Major Issues of Theory and Practice of Fire Resistance of Reinforced Concrete Structures and Buildings

Cited by 2 publications

References 3 publications

Basics of the advanced calculating method the fire resistance of the section of an eccentrically compressed reinforced concrete element

Basics of the advanced calculating method the fire resistance of the section of an eccentrically compressed reinforced concrete element

Scientific approach to fire resistance calculation of reinforced concrete beams and columns

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