Fire Performance of Columns Made of Normal and High Strength Concrete: A Comparative Analysis

Gernay, Thomas

doi:10.4028/www.scientific.net/kem.711.564

Cited by 3 publications

(2 citation statements)

References 6 publications

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“…In the end, the relationship between the applied load ratio and the fire resistance time is obtained for each column. More details are given in (Gernay, 2016).…”

Section: Methodsmentioning

confidence: 99%

Effect of upgrading concrete strength class on fire performance of reinforced concrete columns

Gernay¹,

Peric²,

Mihaylov³

et al. 2017

Applications of Fire Engineering

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High strength concrete (HSC) has become a commonly used material over the last decades, in particular in tall buildings where it allows to increase the net marketable area. As it carries loads more efficiently than normal strength concrete (NSC), it is also specified where architectural considerations call for small support elements. The reduction in member size that can be obtained with HSC results in an increase in usable area. Alternatively, for a fixed column size, longer spans can be supported which leads to a reduced number of supports. HSC also provides advantages in terms of durability. These advantages have resulted in the increased use of HSC observed lately in various applications of civil engineering.An important requirement for building structures is the performance under fire situations. Previous research has shown that HSC behaves differently than NSC at elevated temperature (Phan and Carino, 1998). The most notable differences regard the relative loss of compressive strength with temperature and the occurrence of spalling. For these two aspects, the performance of HSC is lower than that of NSC, i.e. HSC experiences higher rates of strength loss with temperature and a higher susceptibility to spalling. In addition, HSC is often used to reduce the size of structural members. However, this reduction may be detrimental to the fire performance as it leads to faster temperature increase in the section core of the members, and in-

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“…In the end, the relationship between the applied load ratio and the fire resistance time is obtained for each column. More details are given in (Gernay, 2016).…”

Section: Methodsmentioning

confidence: 99%

Effect of upgrading concrete strength class on fire performance of reinforced concrete columns

Gernay¹,

Peric²,

Mihaylov³

et al. 2017

Applications of Fire Engineering

View full text Add to dashboard Cite

show abstract

“…The microstructure of the type of concrete may play a great role in modifying the thermal properties of concrete (Luccioni et al 2003). Moreover, it is reported that HSC performs worse than NSC in fire because of its constituent materials (Gernay 2016). The relative loss of compressive strength with temperature and the higher probability occurrence of explosive spalling are two important factors in HSC that reduces the fire performance of this material (Kodur 2014).…”

Section: Introductionmentioning

confidence: 99%

Non-linear buckling analysis of composite columns made from high and normal strength concrete under fire

et al. 2019

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Composite structures made from the combination of steel profile and concrete have significant loadbearing capacity which depends on the behaviour of the two material components and their interaction, particularly in fire conditions. It is not possible to assess the fire resistance of composite members only by considering the temperature of the steel, because the presence of the concrete may contribute greatly to increase the resistance, strength and thermal inertia of the member, which improves consequently the fire behaviour of the element. The aim of this work is to develop an efficient non-linear 3D finite element model to investigate the behaviour of pin-ended axially loaded composite column made from high strength concrete (HSC) and normal strength concrete (NSC) at different fire rating classes. Two types of column section were selected, notably HEB 160 profile totally encased with concrete and HEB220 partially encased with concrete. The fire behaviour of the columns was tested according to ISO834 standard fire. The results show that the use of HSC in composite columns reduces the level of fire protection with the regard to NSC. NSC in composite structures accommodates higher deflections than HSC, which is safer in case of fire accident. The mechanical resistance in composite columns at room temperature is reduced more than twice after 30 min of fire exposure.

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Concrete Structures

Gernay

Kodur

Naser

et al. 2021

International Handbook of Structural Fire Engineering

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Fire Performance of Columns Made of Normal and High Strength Concrete: A Comparative Analysis

Cited by 3 publications

References 6 publications

Effect of upgrading concrete strength class on fire performance of reinforced concrete columns

Effect of upgrading concrete strength class on fire performance of reinforced concrete columns

Non-linear buckling analysis of composite columns made from high and normal strength concrete under fire

Concrete Structures

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