Modeling of temperature field of “Besser“ concrete blocks under standard fire conditions

1997 ◽  
Vol 70 (2) ◽  
pp. 332-341
Author(s):  
V. I. Nikolaev
Keyword(s):  
Temperature Field ◽  
Standard Fire ◽  
Concrete Blocks ◽  
Fire Conditions

scholarly journals Numerical studies of gypsum plasterboard panels under standard fire conditions

2012 ◽  
Vol 53 ◽  
pp. 105-119 ◽  
Author(s):  
Poologanathan Keerthan ◽  
Mahen Mahendran
Keyword(s):  
Standard Fire ◽  
Numerical Studies ◽  
Fire Conditions

scholarly journals Elastomer Spacers in Fire Conditions

2017 ◽  
Vol 26 (3) ◽  
pp. 109-119
Author(s):  
Paweł Roszkowski ◽  
Bartłomiej Sędłak ◽  
Paweł Sulik
Keyword(s):  
Thermal Degradation ◽  
Fire Resistance ◽  
Load Capacity ◽  
Combustible Material ◽  
Cavity Depth ◽  
Standard Fire ◽  
Degradation Rates ◽  
In Fire ◽  
Resistance Performance ◽  
Fire Conditions

Abstract In the paper, fire resistance of linear joints seal made of elastomer spacers under standard fire conditions, and thermal degradation range of EPDM elastomeric spacers are investigated. The geometry of elastomer spacer joints is important not only for their load capacity under normal conditions - thickness, width, and cavity depth can also influence fire resistance performance. Linear joints of different thicknesses and widths have been tested. The fire insulation and fire integrity were verified for various arrangements. Relatively low thermal degradation rates have been measured, given that EPDM is a combustible material.

scholarly journals Experimental study of fire resistant board configurations under standard fire conditions

2020 ◽  
Vol 116 ◽  
pp. 103153
Author(s):  
Edward Steau ◽  
Mahen Mahendran ◽  
Keerthan Poologanathan
Keyword(s):  
Experimental Study ◽  
Standard Fire ◽  
Fire Conditions

scholarly journals Experimental evaluation of colored HSC column in fire conditions

2013 ◽  
Vol 3 (1) ◽  
pp. 39-54
Author(s):  
C. Britez ◽  
P. Castro-Borges ◽  
A. Berto ◽  
P. Helene
Keyword(s):  
Iron Oxide ◽  
High Strength Concrete ◽  
High Strength ◽  
Experimental Program ◽  
Concrete Column ◽  
Reinforced Concrete Column ◽  
Strength Concrete ◽  
Standard Fire ◽  
In Fire ◽  
Fire Conditions

ABSTRACTIn recent times it has been common to associate high-strength concrete with a greater susceptibility to explosive type spalling, when subjected to high temperatures. In part, this doubt is a result of some experimental programs that are carried out on small unreinforced concrete samples (specimens), which could substantially influence the structural concrete behavior in fire conditions. This paper presents an experimental program, carried out in Brazil on a high strength colored reinforced concrete column (HSCC), eight years-old, fc,8years = 140MPa, basalt coarse aggregate, cross section of 700mm x 700mm, tested under no load and with three faces exposed to standard fire curve ISO 834 for 180min (3h). The results demonstrated, in this case, that HSCC maintained integrity under experimental fire and that the iron oxide pigments can work as an excellent natural thermometer, contributing to the evaluation of the structure post-fire simulation.Keywords: High-strength concrete; fire resistance; colored concrete; column in fire; iron oxide pigment. RESUMENHa sido común asociar el concreto de alta resistencia con una mayor susceptibilidad al desprendimiento por explosión (spalling) cuando se le somete a altas temperaturas. Esta duda se debe en parte a los resultados de algunos programas experimentales que se han llevado a cabo en pequeñas probetas de concreto simple sin refuerzo, lo que puede influir sustancialmente en el comportamiento del concreto en situación de incendio. Este artículo presenta un programa experimental en Brasil donde un pilar de concreto armado colorido de alta resistencia (HCAR), con ocho años de edad, fc,8años = 140MPa, árido grueso basáltico, sección cuadrada de 700mm x 700mm, fue ensayado sin carga y con tres lados expuestos al fuego (curva ISO 834) durante 180min (3h). Los resultados demostraron en este caso que el HCAR se mantuvo íntegro y que los pigmentos de óxido de hierro pueden trabajar como excelente termómetro natural, contribuyendo en la evaluación de la estructura después de la simulación de incendio.Palabras Clave: Concreto de alta resistencia; resistencia al fuego; concreto colorido; pilar sometido al fuego; pigmento de óxido de hierro. 

Tests and Analysis on the Temperature Field within Concrete Filled Steel Tubes with or without Protection Subjected to a Standard Fire

2003 ◽  
Vol 6 (2) ◽  
pp. 121-133 ◽  
Author(s):  
Lin-Hai Han ◽  
Lei Xu ◽  
Xiao-Ling Zhao
Keyword(s):  
Temperature Field ◽  
Fire Protection ◽  
Temperature Fields ◽  
Element Analysis ◽  
Tubular Columns ◽  
Temperature Reduction ◽  
Standard Fire ◽  
Theoretical Predictions ◽  
Fire Curve ◽  
Concrete Filled Steel Tubes

The temperature fields within twelve concrete filled steel tubular columns with or without fire protection when exposed to the ISO-834 standard fire curve (ISO-834, 1975) have been experimentally investigated and the results are presented in this paper. The main parameters varied in the tests are: (1)Sectional types, square and circular; (2) Sectional dimensions from 299mm to 800mm; (3) Thickness of fire protection coat from 14mm to 35mm. A derivation has been given for the surface temperature of concrete-filled tubular columns. Nonlinear finite element analysis has been carried out to calculate the temperature field for the members with and without fire protection. The theoretical predictions are in good agreement with the experimental data. It has been found that the increasing of tube dimensions results in a temperature reduction in the section. The effect of tube dimensions on temperature reduction is more significant for the core concrete than for the steel surface. Within a three-hour fire time, the reduction in temperature due to the increase in tube dimensions becomes less significant when the outer sectional dimension exceeds about 400 mm. The work in this paper provides a basis for further theoretical study on the fire resistance of concrete filled steel tubular columns.

Thermo-Mechanical Behavior of Steel-Concrete Composite Columns under Natural Fire Including Heating and Cooling Phases

2018 ◽  
Vol 35 ◽  
pp. 221-240
Author(s):  
Soumia Sekkiou ◽  
Noureddine Lahbari ◽  
Fabrice Bernard ◽  
Mohamed Salah Dimia
Keyword(s):  
Fire Behavior ◽  
Steel Tube ◽  
Concrete Cover ◽  
Reinforcement Ratio ◽  
Natural Fire ◽  
Hollow Section ◽  
Standard Fire ◽  
Heating And Cooling ◽  
Cooling Phase ◽  
Fire Conditions

The fire behavior of concrete filled hollow steel sections has been studied extensively in various countries. Almost all essential parameters influencing their resistance have been identified: section shape and dimensions, concrete filling, reinforcement ratio, steel tube thickness, column slenderness, thermal and mechanical properties of steel and concrete, and even the contact problem at the steel-concrete interface. Most of these works were done under standard fire conditions (ISO), which are represented by a continuously increasing temperature over time. It is thus not really a curve reflecting a natural fire which includes not only a heating phase but also a cooling phase during which the temperature of the fire is decreasing back to ambient temperature.In this paper, the behavior of axially loaded concrete filled square hollow section columns subjected to natural fire conditions has been studied. The main objectives of this study are: first, to demonstrate the phenomenon of delayed collapse of this type of columns during or after the cooling phase of a fire, and then study the influence of certain determinant parameters, such as section size, tube thickness, reinforcement ratio, concrete cover and column length.The results show that delayed failures occur for massive sections, small values of the thickness of the steel tube and for the low-slendernes.

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