Calculation of fire resistance of reinforced concrete slabs using the simplified methods according to EN 1992-1-2

  • Nguyễn Tuấn Trung Khoa Xây dựng Dân dụng và Công nghiệp, Trường Đại học Xây dựng, 55 đường Giải Phóng, quận Hai Bà Trưng, Hà Nội, Việt Nam https://orcid.org/0000-0001-8008-5988
  • Dương Văn Hai Khoa Xây dựng Dân dụng và Công nghiệp, Trường Đại học Xây dựng, 55 đường Giải Phóng, quận Hai Bà Trưng, Hà Nội, Việt Nam
  • Phạm Mai Phương Khoa Xây dựng Dân dụng và Công nghiệp, Trường Đại học Xây dựng, 55 đường Giải Phóng, quận Hai Bà Trưng, Hà Nội, Việt Nam

Abstract

This paper presents the general principles and the simplified methods to design reinforced concrete slabs in fire according to the Eurocode EN 1992-1-2 of structural fire design for concrete structures. The detailed design procedures for three simplified methods, namely the tabulated method, the 500\si{\degreeCelsius} isotherm method and the zone method are established and illustrated by a design example. The effects of critical parameters including concrete cover, mechanical reinforcement ratio and fire duration are investigated. The results show that fire resistance of concrete slabs increases as concrete cover and reinforcement ratio increase. However, up to a certain value of the concrete cover, the fire resistance will reduce caused by a decrease of the effective depth. If the fire duration is longer, the load-bearing capacity of slabs will also be reduced. It can be easily determined the fire resistance of a concrete slab if the bending moment and the fire resistance are drawn in one figure.

Keywords:

beams; reinforced concrete; fire; fire resistance; EC2.beams; reinforced concrete; fire; fire resistance; EC2.

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Published
31-05-2019
How to Cite
Trung, N. T., Hai, D. V., & Phương, P. M. (2019). Calculation of fire resistance of reinforced concrete slabs using the simplified methods according to EN 1992-1-2. Tạp Chí Khoa Học Công Nghệ Xây Dựng (KHCNXD) - ĐHXD, 13(2V), 41-52. https://doi.org/10.31814/stce.nuce2019-13(2V)-05
Section
Research Papers