A Study on the Collapse Mechanism of High Strength Concrete Columns Apply to Fiber-Cocktail

Abstract:

More high-rise structures are currently being constructed and correspondingly, the compressive strength of concrete has been increased. However, compared to conventional strength concrete the high strength concrete (HSC) exhibits coarse inner pore structure which blocks escape routes of vapour generated in the event of fire. This results in spalling and subsequently, are responsible for fire vulnerability of the structure. In addition, spalling phenomena is also affected by the section dimensions of HSC which is also another crucial factor from socio-economic considerations. Thus, this study was carried out to evaluate the fire resistance performance of hybrid fiber (i.e. steel-polypropylene-fibre)-reinforced HSC columns with different cross-section dimensions. The result of the fire resistance performance testing using 100MPa concrete showed that delay to failure was observed by approximately 76 per cent.

• Periodical: Applied Mechanics and Materials (Volume 784)
• Pages: 385-390
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.784.385
• Online since: August 2015
• Authors: Ki Seok Kwon, Heung Youl Kim, Seung Un Chae, Bum Yean Cho*
• Keywords: Collapse, Fiber, Fire Resistance, High Strength Concrete, Spalling

References

[1] Hertz. K. D., Limits of Spalling of Fire-Exposed Concrete, Fire Safety Journal, 2003, pp.103-116.

DOI: 10.1016/s0379-7112(02)00051-6

[2] H. Song, J. W. Ko, S. Shinichi, Thermal Properties and Explosive Spalling for High Strength Concrete, Journal of the Korea Concrete Institute, vol. 20, no. 5, pp.26-32.

[3] H. J. Kim, S. H. Han, S. K. Choi, Review of Spalling Effect on Concrete Element in Fire, Journal of Korean Institute of fire Science & Engineering, vol. 21, no. 7, 2008, pp.54-63.

[4] L. Bostrum, U. Wickstrom, B. Adl-Zarrabi, Effect of Specimen size and loading conditions on spalling of concrete, Proceedings of the Third International Workshop on Structures in Fire, Ottawa, Canada, 2004, pp.235-248.

DOI: 10.1002/fam.931

[5] U.M. Jumpannen, Effect of strength on fire behaviour of concrete, Nordic Concrete Research, Publication No. 8, (1989).

[6] Korea Institute of Civil Engineering and Building Technology, An Advanced Study on Performance-Based Fire Safety of Structures in Fire (III), Korea Institute of Civil Engineering and Building Technology, pp.40-50. (2009).

DOI: 10.7731/kifse.2017.31.6.040

[7] J. W. Ko, D. W. Ryu, M. H. Lee, S. H. Lee, Study on the Behavior of Microstructure and Spalling Mechanism by Heat and Moisture Movement in Concrete under Fire Environment, Journal of the Architectural Institute of Korea, vol. 23, no. 12, 2007, pp.107-116.