Numerical modelling of two-way reinforced concrete slabs in fire

Lim, Linus; Buchanan, Andrew; Moss, Peter; Franssen, Jean‐Marc

doi:10.1016/j.engstruct.2004.03.009

Cited by 102 publications

(46 citation statements)

References 9 publications

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“…The program was developed for analysing steel or composite structures, but the shell element in SAFIR has been proven to also accurately predict the fire behaviour of RC slabs [13]. A previous study showed that SAFIR can successfully predict the structural behaviour of hibond slabs (proprietary composite slabs) using a combination of shell and beam elements [14], which is the basic idea behind the proposed model in this study.…”

Section: Introductionmentioning

confidence: 99%

Hollow‐core concrete slabs exposed to fire

et al. 2008

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SUMMARYThe aim of this paper is to provide recommendations to designers and to propose a simple method for designers to model the structural behaviour of hollow-core concrete (HC) floor slabs in fire. The proposed finite element model incorporates a grillage system using beam elements to capture the thermal expansion of the precast units in both directions, with the topping concrete over several precast units modelled by shell elements. The research reported herein compares the proposed model with various fire test results of HC slabs. The simulation outcomes show good agreement with the experimental results.Several HC slab flooring systems tested previously at the University of Canterbury for seismic purposes were simulated using this modelling scheme. Various supporting schemes have been considered, and the results show that different arrangements of axial and rotational restraint at the supports can significantly influence the fire performance of the concrete slab floors.

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Section: Introductionmentioning

confidence: 99%

Hollow‐core concrete slabs exposed to fire

et al. 2008

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“…SAFIR has been used extensively to simulate the fire behaviour of reinforced concrete slabs and its applicability has been verified experimentally [20]. The layers of reinforcing bars in the slab are treated as being smeared across the shell element and show uniaxial behaviour.…”

Section: Materials Properties and Modellingmentioning

confidence: 99%

The fire behaviour of multi-bay, two-way reinforced concrete slabs

Moss

Dhakal

Wang³

et al. 2008

Engineering Structures

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This paper describes numerical modelling of the fire behaviour of two-way reinforced concrete slabs in a multi-storey multi-bay building. The building is square, with three bays in each direction. The concrete slab is supported by a perimeter frame, four internal columns and no internal beams. It is assumed that all nine bays of the concrete slab at one level are subjected to fire from below. Two fires were used; the standard ISO834 fire for a 4 hour duration, and a parametric fire based on the ISO834 fire for one hour with the temperatures decaying to ambient in another two hours. The effects of the fires are described in relation to the redistribution of bending moments and the development of tension field action in the slab.

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“…This can possibly be attributed to a reasonably thick slab behaving in compressive membrane action. In recent years a number of numerical models have been developed for modelling the behaviour of reinforced concrete slabs in fire [4][5][6][7], but none of these have taken spalling into account.…”

Section: Introductionmentioning

confidence: 99%

The behaviour of reinforced concrete slabs in fire

Huang

2010

Fire Safety Journal

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In this paper a robust model is presented based on the previous layer procedure developed by the author to also take into account the effects of concrete spalling on the behaviour of concrete slabs under fire conditions. In this study, a detailed analysis of a uniformly loaded reinforced concrete slab subject to different degrees of concrete spalling under a standard fire regime is first carried out. Further, a series of analysis of floor slabs with different degrees of concrete spalling is also performed on a generic reinforced concrete building. A total of 16 cases have been analysed using different degrees of spalling on the slabs, with different extents and positions of localised fire compartments. It is clear that adjacent cool structures provide considerable thermal restraint to the floor slabs within the fire compartment. And it is evident that the compressive membrane force within the slabs is a major player in reducing the impact of concrete spalling on the structural behaviour of floor slabs in fire.

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Numerical modelling of two-way reinforced concrete slabs in fire

Cited by 102 publications

References 9 publications

Hollow‐core concrete slabs exposed to fire

Hollow‐core concrete slabs exposed to fire

The fire behaviour of multi-bay, two-way reinforced concrete slabs

The behaviour of reinforced concrete slabs in fire

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