scholarly journals PERFORMANCE-BASED ANALYSIS OF PLANAR STEEL FRAME IN FIRE, The effect of different types of thermal insulation

2016 ◽  
Author(s):  
Anita Treven ◽  
Tomaž Hozjan ◽  
Miran Sajea
Keyword(s):  
Thermal Insulation ◽  
Mechanical Response ◽  
Mechanical Analysis ◽  
Steel Frame ◽  
Intumescent Coating ◽  
Natural Fire ◽  
Different Types ◽  
Fire Scenarios ◽  
In Fire

The paper presents a performance-based analysis of a planar steel frame exposed to natural fire conditions, if protected with different types of insulation.Bare steel elements, and elements protected with intumescent coating or insulation boards are considered. Two fire scenarios and two material models for steel, with and without the consideration of viscous creep, are applied in order to observe the effect of viscous creep. The analysis consists of three steps: (i) the determination of fire curves, (ii) the thermal analysis, and (iii) the mechanical analysis. Theexpansion of intumescent coating as well as heat flux within the voidspace between the steel surface and the insulation boards are also considered. It is shown that the choice of the thermal insulation has a significant effect on the mechanical response of the frame.

scholarly journals SANDWICH PANELS – BEHAVIOR IN FIRE BASED ON FIRE RESISTANCE TESTS

2016 ◽  
Author(s):  
Paweł Roszkowski ◽  
Paweł Sulik
Keyword(s):  
Thermal Insulation ◽  
Fire Resistance ◽  
Temperature Rise ◽  
Sandwich Panel ◽  
Sandwich Panels ◽  
And Behavior ◽  
In Fire ◽  
Resistance Tests ◽  
Building Elements

<p>Sandwich panel is the material that is easy and quickly to install. Basing on a great experience in the area of determination of the fire resistance class of construction building elements the authors describe the properties and behavior of building elements made of the sandwich panels exposed to fire. The article presents the results of fire resistance tests carried out in accordance with EN 1364-1 non-bearing walls made of sandwich panels with use of different cores.</p>The following parameters were analyzed: temperature rise on unexposed side (I – thermal insulation), integrity (E) depending on the orientations and on the width of the sandwich panels, deflection depending on the thickness of the boards. Conclusions were made on the base of the analysis from fire resistance tests.

scholarly journals Mechanical analysis of a portal steel frame when subjected to a post-earthquake fire

Fire Research ◽  
2019 ◽  
Vol 3 (1) ◽  
Author(s):  
Mohammed Redha Merouani ◽  
Belkacem Lamri ◽  
Abdelhak Kada ◽  
Paulo Piloto
Keyword(s):  
Human Life ◽  
Steel Structure ◽  
Mechanical Analysis ◽  
Steel Frame ◽  
Design Code ◽  
Standard Fire ◽  
Seismic Design Code ◽  
Fire Scenarios ◽  
Current Design ◽  
Algerian Seismic Code

Although current design code can manage the separate action of a fire or an earthquake, which causes a significant threat to the human life and to the integrity of the structures, the dual effect of a Post- Earthquake Fire (PEF) stands as a major hassle to designers and rescuers alike. Algerian seismic design code, RPA99v2003, with no exception does not consider the possibility of a subsequent fire after an earthquake, whose effect can significantly weaken the steel frame and destroy its fire protection. This paper presents the evaluation of the fire resistance for a two-storey steel portal frame, damaged by an earthquake simulated through spectrum response of Chlef, scaled three in the Algerian Seismic Code. First, the design of the steel structure considers seismic actions by a static nonlinear analysis. Second, it is followed by a fire analysis using an ISO834 standard fire model, considering that the structure is partially damaged. The finite element simulation and numerical analysis of the structure in post-earthquake fire condition yield the bilinear capacity curve at ambient temperature and the variation of local and global displacement at high temperature. A final comparison of the damaged (PEF) and undamaged (FIRE) frames subjected to the different fire scenarios is done.

Mechanical Response under Natural Fire of Barrel Shape Shell Structure

2015 ◽  
Vol 6 (1) ◽  
pp. 59-66 ◽  
Author(s):  
Michal Malendowski ◽  
Adam Glema ◽  
Zdzislaw Kurzawa ◽  
Lukasz Polus
Keyword(s):  
Shell Structure ◽  
Degrees Of Freedom ◽  
Mechanical Response ◽  
Mechanical Analysis ◽  
Structural Behaviour ◽  
Element Analysis ◽  
Natural Fire ◽  
3D Geometry ◽  
Structural Shell ◽  
Adiabatic Surface

In this paper, thermo-mechanical analysis of the structural shell construction exposed to natural fire is presented. A barrel shape coverlet with dimensions of 40m x 80m is a roof system covers the shopping arcade. The braced shell structure is made of steel rectangular hollow sections. The steel construction is a support for a special glass system. Behaviour of structure under natural fire conditions is considered as the main goal of research. Fire is simulated with the use of FDS software. Then, adiabatic surface temperatures are transferred into the non-linear Abaqus finite element analysis as boundary conditions for thermo-mechanical analysis. The 3D geometry FE computational model is prepared using 3D beam finite elements with mechanical and thermal degrees of freedom. CFD and FE analyses are sequentially coupled using special individually designed scripts. The analyses show influence of natural fire on the structural behaviour of the roof.

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