Temperature effect on the thermal-physical properties of fire-protective mineral wool cladding of steel structures under the conditions of fire resistance tests

Pozdieiev, Serhii; Nuianzin, Oleksandr; Borsuk, Olena; Binetska, Oksana; Shvydenko, Andrii; Alimov, Bogdan

doi:10.15587/1729-4061.2020.210710

Cited by 4 publications

(14 citation statements)

References 12 publications

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“…The beams under study are part of a solid frame but, according to the simplified approach [10,11], only their cross-section is considered and, according to the refined approach, a small fragment of the beam is considered. According to this approach, a calculation procedure was devised that has the following provisions.…”

Section: The Study Materials and Methodsmentioning

confidence: 99%

“…The simplified approach is described in detail in [10]. With a simplified approach, as shown in [11], recurrent formulas are used to determine the temperature of heating the cross-section of steel beams at each time of exposure to the standard fire temperature for fireproof/non-fireproof steel beams. This approach was applied in work [12]; it was established that for beams without fire protection, its use is effective.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

“…Paper [11] gives a large amount of data on the dependences of thermal-physical characteristics of fireproof materials on the temperature of their heating, procedures to determine them using an experimental-estimation method. The assessment of the reliability of the obtained results employing these characteristics is given in [12] while paper [15] reports a general approach when applying these data for the estimation assessment of fire resistance.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

“…The thermal-physical characteristics of steel were adopted in accordance with the recommendations of norms [5,6]. The thermophysical properties of mineral-wool material were accepted taking into consideration the data given in the technical regulations [11,12].…”

Section: Fig 1 Structure Of Steel Sin-beam With a Corrugated Wallmentioning

confidence: 99%

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Thermal effect of a fire on a steel beam with corrugated wall with fireproof mineral-wool cladding

Nekora

Sidnei

Shnal

et al. 2021

EEJET

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This paper reports a study into the possibility of applying a simplified approach, recommended by standards for conventional steel beams, to determine the heating temperature under the conditions of a fire in relation to steel I-beams with a corrugated wall. The research is predetermined by the limitation of methods that make it possible to determine the heating temperature of this type of beam in a fire using engineering methods with a small amount of calculations. Technical data on steel beams with cladding have been considered for calculation, the features of heat impact of fire on them have been analyzed, a calculation procedure has been devised, the estimation schemes have been built, and the calculations have been performed. Data on the temperature distribution in the cross-sections of beams with and without cladding were obtained by using a simplified method recommended by standards and the refined method based on a finite-element method. Mathematical models have been constructed for calculations that describe the effect of a standard temperature regime of fire on the distribution of temperature in each minute in the cross-sections of steel beams with and without cladding. The models have been described on the basis of the differential equation of thermal conductivity, boundary conditions of the third kind, which take into consideration convective and radiant heat transfer. It was established that the mineral wool cladding of the beam with a corrugated wall is a reliable fire protection agent. The heating temperature of the beam does not reach a critical value of 500 °C in 60 minutes, which provides the class of this beam with the most stringent requirements for its fire resistance in accordance with the classification in line with the acting norms in Ukraine. The simplified method, recommended by the current standards of the European Union and Ukraine, could be effectively used to analyze the fire resistance of these beams and is the basis of the procedure for the estimated assessment of the fire resistance of these structures

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Section: The Study Materials and Methodsmentioning

confidence: 99%

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Section: Fig 1 Structure Of Steel Sin-beam With a Corrugated Wallmentioning

confidence: 99%

See 2 more Smart Citations

Thermal effect of a fire on a steel beam with corrugated wall with fireproof mineral-wool cladding

Nekora

Sidnei

Shnal

et al. 2021

EEJET

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“…However, this method has a number of disadvantages associated with labor intensity, cost and the impossibility of testing building structures with all types of limiting conditions that correspond to the structural schemes of buildings. In addition, the process of preparation, testing and disposal of samples and materials during testing is long in time and may also have environmental consequences [6].…”

Section: Introductionmentioning

confidence: 99%

Determination of features of composite steel and concrete slab behavior under fire condition

Nekora

Sidnei

Shnal

et al. 2021

EEJET

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Methods for calculating the fire resistance of steel-reinforced concrete slabs made using profiled steel sheets under the influence of a standard temperature regime for more than 120 minutes are considered and analyzed. Research has been carried out to determine the heating parameters and the stress-strain state of steel-reinforced concrete slabs made using profiled steel sheets under fire conditions for more than 120 minutes. The results of this study allow to obtain indicators of temperature distribution for assessing the fire resistance of such structures for fire resistance classes above REI 120. Accordingly, the results obtained are a scientific basis for improving the existing method for calculating the fire resistance of steel-reinforced concrete slabs made using profiled steel sheets. The temperature distribution in the cross-section of structures was obtained using a general theoretical approach to solving the problem of heat conduction using the finite element method. Using the obtained temperature distributions, the parameters of the stress-strain state were determined based on the method of limiting states. To carry out the calculations, appropriate mathematical models were created that describe the effect of the standard temperature regime of a fire, to determine the temperature distribution at every minute in the sections of steel-reinforced concrete slabs with profiled steel sheets. A method is proposed for dividing the section into zones to take into account the decrease in the indicators of the mechanical properties of concrete and steel. A simplified method for the design assessment of steel-reinforced concrete slabs made using profiled steel sheets is proposed, which is consistent with the current EU standards and can be effectively used to analyze their fire resistance when establishing their compliance with the fire resistance class REI 120 and higher.

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Increasing the Efficiency and Environmental Friendliness of Fire Resistance Assessment Tools for Load-Bearing Reinforced Concrete Building Structures

Nuianzin¹,

Pozdieiev²,

Sidnei³

et al. 2023

Ecol. Eng. Environ. Technol.

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In this work, it is substantiated that it is possible to create a fire installation with parameters that will ensure higher environmental friendliness of the tests compared to large-sized furnaces. At the same time, its configuration will be universal, compact and capable of high reproducibility of experimental results. A full factorial experiment was conducted. According to its results, the parameters of the furnace chamber, which most significantly affect the reproducibility of the results, were determined. This are the volume of the chamber, the distance from the burners to the surface of the examined fragment of the load-bearing reinforced concrete building structure, and the height at which the opening for the exit of combustion products is located. Adequacy of operation of the designed installation was verified by the computer simulation method. Natural gas was used as fuel. On the basis of the received data, a sketch of the installation was created for conducting the experimental part of evaluating the fire resistance of load-bearing reinforced concrete building structures under the influence of the standard fire temperature regime. It can ensure a high degree of reproducibility of the test results.

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Temperature effect on the thermal-physical properties of fire-protective mineral wool cladding of steel structures under the conditions of fire resistance tests

Cited by 4 publications

References 12 publications

Thermal effect of a fire on a steel beam with corrugated wall with fireproof mineral-wool cladding

Thermal effect of a fire on a steel beam with corrugated wall with fireproof mineral-wool cladding

Determination of features of composite steel and concrete slab behavior under fire condition

Increasing the Efficiency and Environmental Friendliness of Fire Resistance Assessment Tools for Load-Bearing Reinforced Concrete Building Structures

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