| doi:10.3850/978-981-08-6218-3_CC-Fr042 |
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FIRE STRENGTH ANALYSIS OF COMPOSITE FLOORING SYSTEM
Z. Gonga, R. Y. Xiaob and C. S. Chinc
School of engineering, Swansea University, Swansea, UK.
a380513@swansea.ac.uk
bR.Y.XIAO@swansea.ac.uk
cC.S.CHIN@swansea.ac.uk
EXTENDED ABSTRACT
1. INTRODUCTION
Composite flooring system has been wildly used in the modern construction due to its advantages; however, due to the different thermal properties of steel and concrete components, the composite flooring system is very critical under the fire situation[1]. It will never be possible to prevent fires from occurring thus the aim of the fire safety engineer is to reduce the risk presented by fire to acceptable levels. Base on the highly developed computer process capability, finite element technique can be used to model the response of composite flooring system in the fire situation. The research presented here has focused on investigating the behaviour of concrete slab in fire conditions using Finite Element Method. The simulation presents the results of the time dependent temperature distribution within the structures, the structural responses under the elevated temperature as well as their effect on the fire resistant capacity of the structure.
2. Validated finite element model
The response of composite floor in fire conditions have been validated by modelling metal decking floor system using finite element technique. The results of the fire test conducted by BRANZ (Building Research Association of New Zealand) are used for validation [2, 3]. The Results obtained from numerical simulation agree well with the test conducted by BRANZ. For the details analysis of temperature distribution in the slab components, 10 points were selected from the concrete slab which indicated in Figure 1. The variation of temperatures in the concrete calculated with ANSYS and measured during the fire test is shown in Figure 2 [4].
Figure 1: Temperature distribution after 2 hours
Figure 2: Compare test results with ANSYS results
3. REFERENCES
[1] Bailey CG, Ehab Ellobody, Whole-building behaviour of bonded post-tensioned concrete floor plates exposed to fire. Engineering Structures 31 (2009) 1800_1810
[2] Fire resistance tests on elements of building construction. ISO834 International Organisation for Standardisation (1975).
[3] Lim L, Wade C. Experimental fire tests of two-way concrete slabs. Fire Engineering Research Report 02/12. University of Canterbury and BRANZ Ltd, New Zealand, 2002.
[4] BS 8110 Structural use of concrete, Part 1 Code of practice for design and construction. British Standards Institution, 1985.