An Experimental Study on Fire Resistance of Slim Floor Beam

Abstract:

Composite beam using asymmetric H-shaped steel is one of the constructional structures developed in the advanced countries in Europe since early 1990s. The purpose of this study on composite beams where H-shaped steel is partially laid in concrete slabs was to find how to design fire protection and improve fire-resistance to make deep deck plates provide the beams with advantages upon a fire and to improve stiffness in structural aspect. Only lower flange which is directly exposed to a fire was included in fire-resistance design in order to decide optimal fire- protection design condition and test was conducted for spray-coating and paint-coating. In the fire resistance test, web thickness and lower flange thickness were varied to derive the optimum condition for improving fire-resistance performance. It was observed from the test that 90-minute-protection employed to lower flange provided fire resistance for 3 hours. It was also observed that the basic shape resisted fire for 89 minutes, while web reinforcement and lower flange reinforcement provided fire-resistance for 112 and 157 minutes, respectively. The result showed that lower flange reinforcement is the most effective way to improve fire-resistance.

• Periodical: Applied Mechanics and Materials (Volume 82)
• Pages: 752-757
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.82.752
• Online since: July 2011
• Authors: Hyung Jun Kim, Heung Youl Kim, Soo Young Park
• Keywords: Asymmetric H Steel, Fire Resistant, Firing Test, Protection, Shape Design

References

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