• Fire Science and Engineering
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• v.31 no.6
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• pp.60-66
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• 2017

Steel framed building can be destroyed due to deteriation of structural stabilities in a fire. This leads a TMC Fire Resistant Steels and this study analyzed the structural stabilities such as a deflection and a reduction of maximum load capacity for the structural beams built with a TMC Fire Resistant Steel. In this study the structural stabilities were evaluated using a mechanical properties in high temperatures not only a heat transfer theory but a heat stress anlaysis with a statistically determinated beam and a statistially indeternated one. The results showed that a TMC Fire Resistant Steels demonstrated a little lower those of Fire Resistant Steels.

• Journal of Korean Society of Steel Construction
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• v.19 no.2
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• pp.181-190
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• 2007

A fire-resistant steel with enhanced load-bearing capacity has been developed to enable structural elements such as columns and beams withstand exposure to severe fire conditions. To precisely evaluate the fire-resistant performance of structural elements that compose fire-resistant steels, mechanical properties such as yield strength and elastic modulus are essential. To obtain the mechanical database of fire-resistant steels at high temperatures, tensile tests at high temperatures were conducted on steels of two kinds of thicknesses. The results showed that the thickness difference could not affect the mechanical properties at a high temperature.

• Fire Science and Engineering
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• v.28 no.5
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• pp.52-57
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• 2014

When structural elements of steel framed structures are exposed to fire situations, the structural stability begins to decrease due to dislocation of substantial. The increase of the beam length causes an additional stress and deflection. These can be serious factors to cause a severe failure of structures. To improve the fire resistance of beams, prevention of the heat from a fire by coating with fire protection material is essential for beams. The FR 490 was developed to enhance fire resistance compared with SM 490 steel. However, the fire resistance of FR 490 H-beams has not been evaluated by analysis method since it was developed. In this paper, materials properties in high temperature and a heat transfer and thermal stress theory were used in the evaluation of the fire resistance of FR490 H-beams. The fire resistance of FR490 steel beams was compared with that of SM490 beams. The comparison verified that the structural stability of FR490 beams at high temperature was superior to that of SM490 beams.

• Fire Science and Engineering
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• v.30 no.5
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• pp.82-86
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• 2016

The fire resistance of a statistically indeterminate beam made of fire resistant steel was analyzed using the mechanical and thermal databases and compared with that of an indeterminate beam constructed of ordinary structural steel to not only determine the fire resistance performance of a statistically indeterminate beam itself, but also to determine if it is stable to test the fire resistance performance with a determinate beam built with ordinary structural steel instead of an indeterminate beam made from fire resistant steels. The results showed that the fire resistance of an indeterminate beam consisting of fire resistant steels is better than that of a determinate beam made of SS 400 and if the length of the beam built with FR 490 is longer, the displacement of the beam is higher. In addition, the fire test with a determinate beam made of SS 400 is was more conservative than that of an indeterminate beam made of FR 490 in the range of the same length. Therefore, another measure should be considered if beams built with FR 490 are longer than thos of SS 400.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2017.05a
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• pp.111-112
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• 2017

Fire is very serious condition in steel based structures. Therefore, to enhance the structural stability of columns and beams in high temperatures, fire resistant steels and TMC fire resistant steels are developed from steel manufacturing companies. In this study to evaluate the structural stability and compare the resistant performance, a fire engineering design method was applied and fire resistant steels showed the better performance than other two materials.

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2007.04a
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• pp.24-29
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• 2007

• Proceedings of the Korean Institute of Building Construction Conference
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• 2015.11a
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• pp.149-150
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• 2015

Structural beam plays a key role to carry the applied load on the floors. And then the beam have to sustain the applied load and its load-bearing capacity in fire situation. In this study to know the fire resistance performance of long span beam made of a submarine structural steels, an engineering method is used using mechanical and thermal properties of structural steel at high temperature.

• Fire Science and Engineering
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• v.27 no.5
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• pp.1-7
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• 2013

Fire at building can occur enormous damages to life, properties, and environment and the risk of fire breakout is going up higher because of application of combustible materials than before. Therefore, the steel industries are trying to develop fire resistant steel in order to sustain the load bearing capacity of steel structures during fire situation. In this paper, to give the basis data-bases for evaluation of structural stability of steel structures applied fire resistant steel, FR 490, the tests of mechanical and thermal properties at high temperature were conducted and the comparisons are done with the SM 490 that has the same mechanical one.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2016.10a
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• pp.60-61
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• 2016

Performance has been developed in terms of structural strength. Especially, in a structural steels, it is regarded as a common design process that an yield stress of thicker plate than 40mm uses that of below 40mm in thickness. This can be done using TMCP(Thermo mechanical control process). In this study, the structural stabilities such as deflection, maximum load carrying capacity would be calculated in high temperatures.

• Fire Science and Engineering
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• v.29 no.5
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• pp.23-28
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• 2015

Recently, structural materials have been developed to have high performance, and SM 520 has been developed and used for high-rise buildings. However, fires frequently occur in buildings, and the number of victims and amount of damage increase year by year. However, the evaluation of fire resistance performance for structural beams made of SM 520 is done with specimens made of ordinary structural steels with boundary conditions of a fixed beam, and the results are allowed for use in steel-framed buildings. This study analyzed the fire resistance performance of statistically indeterminate beams built with SM 520. The analysis used a fire engineering technique that includes mechanical and thermal data of SM 520 and heat transfer theory, and heat stress analysis was also conducted. The results from the analysis were compared with those from a statistically determinate beam made of ordinary structural steels.