A numerical study of gypsum plasterboard behaviour under standard and natural fire conditions

2011 ◽  
Vol 36 (2) ◽  
pp. 107-126 ◽  
Author(s):  
D. J. Hopkin ◽  
T. Lennon ◽  
J. El-Rimawi ◽  
V. V. Silberschmidt
Keyword(s):  
Numerical Study ◽  
Natural Fire ◽  
Fire Conditions

A numerical study of thermal behavior of CASTOR RBMK-1500 cask under fire conditions

2021 ◽  
Vol 376 ◽  
pp. 111131
Author(s):  
Robertas Poškas ◽  
Povilas Poškas ◽  
Kęstutis Račkaitis ◽  
Renoldas Zujus
Keyword(s):  
Thermal Behavior ◽  
Numerical Study ◽  
Fire Conditions

scholarly journals Post-Fire Susceptibility to Brittle Fracture of Selected Steel Grades Used in Construction Industry—Assessment Based on the Instrumented Impact Test

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 3922
Author(s):  
Mariusz Maslak ◽  
Michal Pazdanowski ◽  
Marek Stankiewicz ◽  
Paulina Zajdel
Keyword(s):  
Charpy Impact ◽  
Water Mist ◽  
Heating Regime ◽  
Building Structures ◽  
Initial State ◽  
Slow Cooling ◽  
Natural Fire ◽  
Development Scenarios ◽  
Steel Grades ◽  
Fire Conditions

The change in the value of the breaking energy is discussed here for selected steel grades used in building structures after subjecting the samples made of them to episodes of heating in the steady-state heating regime and then cooling in simulated fire conditions. These changes were recorded based on the instrumented Charpy impact tests, in relation to the material initial state. The S355J2+N, 1H18N9T steels and also X2CrNiMoN22-5-3 duplex steel were selected for detailed analysis. The fire conditions were modelled experimentally by heating the samples and then keeping them for a specified time at a constant temperature of: 600 °C (first series) and 800 °C (second series), respectively. Two alternative cooling variants were investigated in the experiment: slow cooling of the samples in the furnace, simulating the natural fire progress, without any external extinguishing action and cooling in water mist simulating an extinguishing action by a fire brigade. The temperature of the tested samples was set at the level of −20 °C and alternatively at the level of +20 °C. The conducted analysis is aimed at assessing the risk of sudden, catastrophic fracture of load-bearing structure made of steel degraded as a result of a fire that occurred previously with different development scenarios.

scholarly journals ANALYSIS OF COMPOSITE BUILDINGS UNDER FIRE CONDITIONS

2016 ◽  
Author(s):  
Shuyuan Lin ◽  
Zhaohui Huang ◽  
Mizi Fan
Keyword(s):  
Composite Structures ◽  
Three Dimensional ◽  
Membrane Action ◽  
Natural Fire ◽  
End Plate ◽  
Floor Slabs ◽  
Support Conditions ◽  
Plate Connections ◽  
The Impact ◽  
Fire Conditions

In this paper, the performances of a generic three dimensional 45m x 45m composite floor subjected to ISO834 Fire and Natural Fire are investigated. The influences of reinforcing steel mesh and vertical support conditions on the tensile membrane action of floor slabs are investigated in details. Two robust 2-node connection element models developed by the authors are used to model the behaviour of end-plate and partial end-plate connections of composite structures under fire conditions. The impact of connections on the 3D behaviour of composite floor is considered. Based on the results obtained, some design recommendations are proposed to enhance the fire safety design of composite buildings.

On the plastic moment-shear interaction curves of steel sections under fire

2016 ◽  
Vol 7 (2) ◽  
pp. 97-113 ◽  
Author(s):  
Mahmud M.S. Dwaikat
Keyword(s):  
Numerical Study ◽  
Steel Beams ◽  
Ambient Conditions ◽  
Content Type ◽  
Capacity Curves ◽  
Steel Sections ◽  
Interaction Curves ◽  
The Stability ◽  
Hot Rolled ◽  
Fire Conditions

Purpose Different approaches, originally developed for ambient conditions, exist in current codes and standards for incorporating the effect of moment–shear (M–V) interaction on the plastic-carrying capacity of wide-flanged (WF) steel sections. There is a lack of experimental and theoretical studies that address this issue under fire conditions. Design/methodology/approach The current paper presents a numerical study investigating the effect of fire exposure on the plastic M–V capacity curves of doubly symmetrical, WF, hot-rolled steel sections. Validated high-fidelity finite element (FE) models constructed via ANSYS are used to study the effect M–V interaction on the plastic capacity of WF sections. Also, a simplified plastic sectional analysis, intended to be used by engineering practitioners, is proposed for generating the plastic M–V interaction curves. Findings The study shows that the fire-induced non-uniform heating of the section plates affects the shape of the plastic M–V interaction capacity curves. Comparison of different methods against FE results shows that the method specified in the Eurocode is very conservative at room-temperature, but it turns out to be barely sufficiently conservative under fire conditions. Originality/value It is well noted that lack of fire tests on the M–V interaction, including the stability of the plates of steel sections under fire, make it difficult to reach a definite assessment on the effect of M–V interaction on the bearing capacity of steel beams.

A numerical study on the structural performance of a ductile connection under fire conditions

ce/papers ◽  
2021 ◽  
Vol 4 (2-4) ◽  
pp. 1196-1202
Author(s):  
Yu Liu ◽  
Shan‐Shan Huang ◽  
Ian Burgess
Keyword(s):  
Numerical Study ◽  
Structural Performance ◽  
Fire Conditions

scholarly journals Development of natural fire prevention method based on remote sensing data: case study of Krasnoyarsk region forests

2021 ◽  
Vol 27 (2) ◽  
pp. 340-354
Author(s):  
Almaz Gizatullin
Keyword(s):  
Remote Sensing ◽  
Remote Sensing Data ◽  
Fire Danger ◽  
Fire Prevention ◽  
Natural Fire ◽  
Sensing Data ◽  
Krasnoyarsk Region ◽  
Prevention Method ◽  
Fire Conditions

The stages of development of natural fire prevention method based on remote sensing data were considered. The case study is focused on Krasnoyarsk region forests. There was a rationale for selecting a study area on the basis of statistical fire data (FIRMS thermal hot spots 2016–2018) and a variety of fire conditions. The fire assessment was founded on the most informative fire factors—surface temperature, vegetation cover inhomogenuity and man-made load, which are derived by the natural-fire characteristics of the territory. These factors were evaluated by measuring parameters closed to them, respectively—radiobrightness temperature based on thermal emission, vegetation index NDVI and integral indicator of distance to settlements and roads. Materials from the Terra/Aqua, Sentinel-3, Landsat-8, Sentinel-2 satellites and Open Street Maps vector map layers were used as data sources. With use of statistical data, the relationship between above parameters and the present fire danger of Krasnoyarsk region was analyzed. Based on the results, we obtained different by forest rayon and fire season month correlation coefficients that described the contribution of individual factors to a fire danger, and threshold values of parameters for preventing fires. Then a sequence of stages of analytical and synthetic fire danger assessment as a study method was built. Validation of the method was performed in the most fire dangerous and representative in terms of fire conditions area in the south-west of the Krasnoyarsk Territory from April 1 to May 10, 2019. It showed sufficient accuracy (65 %) and reliability (58 %) of fire forecast.

A Portable Field Burner to Simulate Natural Fire Conditions.

1978 ◽  
Vol 1 (2) ◽  
pp. 197 ◽  
Author(s):  
JH Leigh ◽  
BC Bautovich ◽  
MD Holgate
Keyword(s):  
Natural Fire ◽  
Fire Conditions
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