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Analytical model of composite floors with steel fibre reinforced concrete slab subjected to fire

    Vadims Goremikins Affiliation
    ; Jiří Šejnoha Affiliation
    ; František Wald Affiliation
    ; Jan Bednář Affiliation

Abstract

Under fire, membrane action plays an important role in the performance of slabs subjected to large deflections. In this paper, a new model is proposed based on a proper approximation of horizontal displacements for a simply sup­ported composite slab. The novelty of the proposed approach consists in a special treatment of the system of shape func­tions for the “in-plane” displacements. Moreover, a load applied to the slab is divided into two components, so that one component is balanced by the membrane forces, while the second one is transmitted by the bending forces (including transfer of shear and moment). The deflection due to thermal elongations is replaced by the identical deflection caused by a fictitious load. Unknown parameters are calculated using the principle of virtual displacements. The effectiveness of the model is validated by the results obtained from experiments.


First published online: 25 Nov 2015

Keyword : approximation of horizontal displacements, membrane action, composite slab, steel beams

How to Cite
Goremikins, V., Šejnoha, J., Wald, F., & Bednář, J. (2017). Analytical model of composite floors with steel fibre reinforced concrete slab subjected to fire. Journal of Civil Engineering and Management, 23(2), 204-212. https://doi.org/10.3846/13923730.2015.1027260
Published in Issue
Feb 6, 2017
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This work is licensed under a Creative Commons Attribution 4.0 International License.