The influence of description of fire curves on the thermal and reliability response of steel structure

Kubicka, Katarzyna; Radoń, Urszula; Szaniec, Waldemar

doi:10.1051/matecconf/201711700095

Cited by 3 publications

(2 citation statements)

References 6 publications

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“…Due to the fact that the structure is statically determinate, during the whole fire analysis, internal forces remain the same as in the basic situation. The computations, aimed at finding axial forces, strains, and displacements, are run with the MES3D program [32][33][34]. The computations proceeded in two steps.…”

Section: Resultsmentioning

confidence: 99%

Influence of the Thermal Insulation Type and Thickness on the Structure Mechanical Response Under Fire Conditions

2019

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The concept of fire safety covers an extremely vast scope of issues. To ensure an adequate fire safety level, it is necessary to combine research and actions in several fields, such as the mathematical, physical, or numerical modelling of a fire phenomenon. Another problem is to design different types of fire protection, including alarm systems, sprinkler systems, and also roads and evacuation systems, in a manner that ensures maximum safety for the building’s users. A vital issue is the analysis of the static-strength response of the structure under fire conditions. This study, concerned with such analyses, is limited to steel truss structures. In technical approvals, manufacturers of fire-proofing materials do not account for the character of the performance of individual structural members. The components in compression need thicker insulation than those in tension. This phenomenon is related to the fact that under fire conditions, the flexural buckling coefficient in compressed members is abruptly reduced with an increase in temperature. In turn, this increase in temperature leads to a fast reduction in resistance. In addition, members in tension have much higher resistance than those in compression in the basic design situation, i.e., at the instant of t = 0 min. Consequently, even a considerable decrease in the resistance of tension members is not as dangerous as that of compression members. Therefore, due to the nature of the performance of individual elements, fire-proofing insulation of every steel structure should be computationally verified. Additionally, in this paper, the influence of the type of fire insulation on the mechanical response of the structure was investigated. Calculations were carried out for different types of sprayed-on insulation, and also for contour and box insulation panels. The graphs show the behaviour of the elastic modulus, the yield point, and the resistance of the elements in the successive minutes of the fire for the different methods of fire protection used. The best results were obtained for vermiculite and gypsum spray.

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confidence: 99%

Influence of the Thermal Insulation Type and Thickness on the Structure Mechanical Response Under Fire Conditions

2019

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“…Laboratory tests with several types of fire curves, including those defined by Eurocodes; some theoretical research is presented in Kubicka et al [31].…”

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The Initial Assessment of the Possibility of Simulation Fire Standard Curve in the Electric Furnace with the Assessment of Chemical Composition Changes in Steel after Cooling Phase

Kubicka,

Szczecina,

Suckert

et al. 2024

Metals

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The article focuses on analyzing changes in the chemical composition of steel samples after the cooling phase. A few distinct types of samples made of St3S steel were heated in an electric resistance furnace for 1 h. The temperature in the following minutes of the furnace work was programmed to reflect the standard fire curve defined in the Eurocode in the best possible way. The box-type electric furnace was used. There were three series of samples, and each of them was cooled down in diverse ways: (a) in the water, (b) in the polymer cooling medium AQUA-QUENCH® 320, and (c) in the furnace. After that, the chemical composition of diverse types of samples with various kinds of cooling was checked. This task was realized using a laser elementary analysis microscope with the EA-300 head. The investigation allowed the authors to draw the following conclusions: the electric furnace may be used to simulate an increase in temperature with fire duration according to standard fire curve only in the phase of fully developed fire situation; the EA-300 head for laser elementary analysis allows checking of the chemical composition of investigated elements very quickly (in a few seconds).

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Probabilistic Models of the Functioning of Composite Structures with Thin-Sheet Cladding and Material-Energy-Saving Heat Insulation

Bobryashov

Bushuev

2020

International Scientific Conference Energy Management of Municipal Facilities and Sustainable Energy Technologies EMMFT 2019

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The influence of description of fire curves on the thermal and reliability response of steel structure

Cited by 3 publications

References 6 publications

Influence of the Thermal Insulation Type and Thickness on the Structure Mechanical Response Under Fire Conditions

Influence of the Thermal Insulation Type and Thickness on the Structure Mechanical Response Under Fire Conditions

The Initial Assessment of the Possibility of Simulation Fire Standard Curve in the Electric Furnace with the Assessment of Chemical Composition Changes in Steel after Cooling Phase

Probabilistic Models of the Functioning of Composite Structures with Thin-Sheet Cladding and Material-Energy-Saving Heat Insulation

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