Finite Element Modelling of Precast Hollow-Core Concrete Floors Under Fire Conditions (2008)
PublisherUniversity of Canterbury. Civil and Natural Resources Engineering
Precast prestressed hollow-core concrete flooring units are widely used in reinforced concrete moment-resisting frame buildings in New Zealand, yet their behaviour under fire has not received much attention. This is because large scale fire tests are difficult and expensive, leaving computer analysis as the only alternative. However, the currently available computer analysis methods are neither accurate nor easy to use. This paper describes a simple yet reliable computational method to be used in design for modelling the structural behaviour of hollow-core prestressed concrete slabs exposed to fires. The model has a major limitation of not being able to model shear or tensile failure in the webs of the hollow-core units, but the simulation outcomes show reasonably good agreement with experimental fire tests of hollow-core slab units, thereby verifying the reliability of the model.
CitationChang, J., Dhakal, R.P., Moss, P.J., Buchanan, A.H. (2008) Finite Element Modelling of Precast Hollow-Core Concrete Floors Under Fire Conditions. Dundee, Scotland: 7th International Congress, Concrete: Construction's Sustainable Option, 8-10 Jul 2008.
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Keywordsfire resistance; hollow-core; finite element analysis; computer model
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Chang, J.; Dhakal, Rajesh; Moss, P.; Buchanan, A. (University of Canterbury. Civil and Natural Resources Engineering, 2010)Several factors can affect the behaviour of the hollowcore floor slabs in fire. This paper analytically investigates the relationship between the fire resistance of the overall floor system and the floor length to width ...
Chang, J.; Moss, P.J.; Dhakal, Rajesh; Buchanan, A.H. (University of Canterbury. Civil and Natural Resources Engineering, 2008)Previous studies have shown that the fire performance of hollowcore units is significantly affected by the end support conditions, but it has not been clear how the fire resistance of the overall floor system can be ...
Chang, J.; Buchanan, A.H.; Dhakal, Rajesh; Moss, P.J. (University of Canterbury. Civil Engineering., 2006)The aim of this paper is to provide recommendations to designers, and to propose a simple method for designers to model the structural behaviour of hollowcore concrete floor slabs in fire. The proposed finite-element model ...