Thermal transient analysis of steel hollow sections exposed to fire

Lausová, Lenka; Skotnicova, Iveta; Michalcová, Vladimíra

doi:10.1016/j.pisc.2015.11.040

Cited by 8 publications

(4 citation statements)

References 5 publications

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“…e.g., Lausova et al [9,10] performed an experiment validated by numerical finite element (FE) simulation of a steel frame structure under fire loading, which caused a non-uniform temperature load over the cross-section and thus additional internal forces. Lausova et al [11] also conducted an experimental-numerical study of the non-uniform temperature distribution across hollow steel sections of different sizes under fire loading. Moreover, Mourao and da Silva [12] analysed the behaviour of steel beams under uniform temperature rising.…”

Section: Introductionmentioning

confidence: 99%

Contribution of Various Loads to the Convex Shape of Rock Wool Insulation Slabs during Production

Hladnik,

Jerman

2023

Materials

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Rock wool insulation slabs are produced in special curing ovens, where molten rock wool fibres coated with binder are compressed between two slat conveyors and blown with hot air for vitrification. Often, the cross-section of the final slabs is slightly convex, which is undesirable. The degree of convexity depends on the deformation of the steel crossbars of the slat conveyors, which are subjected to combined pressure and nonlinear temperature loadings. Due to this complex loading state, it is difficult to determine the contribution of individual load to the total deformation. The main aim of the study was to determine these contributions. Temperature and stress measurements of the crossbars were performed during rock wool production. Upon collecting these measurements, a finite element (FE) model of a crossbar was established for the identification of the pressure loading acting on the crossbars, and finally for determination of their deformations. As a main result of the study, an inverse problem-based methodology for the identification of the deflection of a structure due to unknown temperature and pressure loadings was established and applied on the specific case. The deviations between the deformations of the FE crossbars and the final shape of the rock wool slabs were below 10%, which validates the novel methodology.

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Section: Introductionmentioning

confidence: 99%

Contribution of Various Loads to the Convex Shape of Rock Wool Insulation Slabs during Production

Hladnik,

Jerman

2023

Materials

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“…As a result, the action of high temperatures can pose a real hazard to the safety of the whole system, because it leads to reduced load-bearing capacity, or even failure of steel elements. Consequently, it is crucial to understand the complex behavior of the steel structure under fire conditions already at the beginning of structure design, namely at the computational analysis stage (Lausova et. al., 2015;Pantous et.…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of a steel frame in a fire situation

Szczecina

Nowak

2022

iboa

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In the paper, the stages of modelling of a steel frame under fire conditions were discussed. Numerical computations were performed using SIMULIA Abaqus software. The way of defining and developing the computational model was described. In the numerical procedure adopted in the paper, much attention was paid to formulas related to various types of the model parameters that depend on the fire temperature. The results were shown in a graphic form. They were compared with the results obtained from the analysis, in which the impact of elevated temperatures was disregarded. Based on numerical simulation results, an attempt was made to assess the effect of fire on the steel frame components. The paper is exploratory in character and provides an introduction to the issues related to the modelling of steel structure fires. The numerical modelling of the structure fire described in the paper can have practical potential for structural engineers.

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“…In 2016, Lausova et al [10] presented a study to analyze the distribution of nonuniform temperatures in hollow square steel cross-sectional profiles. This study consisted of numerical simulations, of four different profiles under fire on three sides, using the finite element method in the ANSYS ® .…”

Section: Introductionmentioning

confidence: 99%

Analytical Equations Applied to the Study of Steel Profiles under Fire According to Different Nominal Temperature-Time Curves

Oliveira

Fonseca

Campilho

et al. 2021

MCA

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Some analytical methods are available for temperature evaluation in solid bodies. These methods can be used due to their simplicity and good results. The main goal of this work is to present the temperature calculation in different cross-sections of structural hot-rolled steel profiles (IPE, HEM, L, and UAP) using the lumped capacitance method and the simplified equation from Eurocode 3. The basis of the lumped capacitance method is that the temperature of the solid body is uniform at any given time instant during a heat transient process. The profiles were studied, subjected to the fire action according to the nominal temperature–time curves (standard temperature-time curve ISO 834, external fire curve, and hydrocarbon fire curve). The obtained results allow verifying the agreement between the two methodologies and the influence in the temperature field due to the use of different nominal fire curves. This finding enables us to conclude that the lumped capacitance method is accurate and could be easily applied.

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Thermal transient analysis of steel hollow sections exposed to fire

Cited by 8 publications

References 5 publications

Contribution of Various Loads to the Convex Shape of Rock Wool Insulation Slabs during Production

Contribution of Various Loads to the Convex Shape of Rock Wool Insulation Slabs during Production

Numerical analysis of a steel frame in a fire situation

Analytical Equations Applied to the Study of Steel Profiles under Fire According to Different Nominal Temperature-Time Curves

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