Fire reaction of concrete with and without PP fibres: experimental analysis and numerical simulation

Piloto, P.A.G.; Mesquita, L.M.R.; Balsa, Carlos

http://hdl.handle.net/10198/16742

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Authors

Piloto, P.A.G.

Mesquita, L.M.R.

Balsa, Carlos

Abstract(s)

The fire resistance of partially encased sections (HEB and IPE) depends on the temperature evolution during fire exposure. Eurocode 4, part 1.2 [1], proposes the assessment of the cross section using the method of the four components (flanges, web, reinforcement and concrete) to determine the resistance and stiffness under fire (R30, R60, R90, R120). This study aims to assess the balanced summation model of Eurocode (informative annex G). New formulae will be proposed to evaluate the plastic resistance to axial compression and effective flexural stiffness around the weak axis, based on new simple formulas to determine the flange average temperature, the residual height and average temperature of the web, the residual cross section and average temperature of concrete, the reduced stiffness and strength of reinforcement. The advance calculation method was used to validate new and safe formulae, based on the analysis of the cross section totally engulfed in fire (fire in four sides).

Keywords

Fire reaction Concrete Thermal performance Heat release rate

URI

http://hdl.handle.net/10198/16742

Citation

Piloto, P.A.G.; Mesquita, L.M.R.; Balsa, Carlos (2015). Fire reaction of concrete with and without PP fibres: experimental analysis and numerical simulation. In IFireSS – International Fire Safety Symposium. University of Coimbra, Portugal. ISBN 978-989-98435-5-4