[en] This paper presents a study performed on the collapse of reinforced concrete columns subjected to natural fire conditions during and after the cooling phase of the fire. The aim is, first, to highlight the phenomenon of collapse of concrete columns during and after the cooling phase of a fire and then, to analyze the influence of some determinant parameters. The main mechanisms that lead to this type of failure are found to be the delayed increase of the temperature in the central zones of the element and the additional loss of concrete strength during the cooling phase of the fire. A parametric study is performed considering different fires and geometric properties of the column. This shows that the most critical situations with respect to delayed failure arise for short fires and for columns with low slenderness or massive sections.
Disciplines :
Civil engineering
Author, co-author :
Dimia, Mohamed Salah; University of Batna
Guenfoud, Mohamed; University of Guelma
Gernay, Thomas ; Université de Liège - ULiège > Département Argenco : Secteur SE > Ingénierie du feu
Franssen, Jean-Marc ; Université de Liège - ULiège > Département Argenco : Secteur SE > Ingénierie du feu
Language :
English
Title :
Collapse of concrete columns during and after the cooling phase of a fire
Fike, R.S., Kodur, V.K.R., An approach for evaluating the fire resistance of CFHSS columns under design fire scenarios (2009) Journal of Fire Protection Engineering, 19, pp. 229-259
Kirby, B.R., Lapwood, D.G., Thomson, G., (1986) The Reinstatement of Fire Damaged Steel and Iron Framed Structures, , British Steel Corporation, Swinden Laboratories
Li, Y.-H., Franssen, J.-M., Residual compressive strength of concrete after a fire Journal of Structural Fire Engineering, , (accepted for publication)
Hsu, J.-H., Lin, C.-S., Residual bearing capabilities of fire-exposed reinforced concrete beams (2006) International Journal of Applied Science and Engineering, 4 (2), pp. 151-164
Hsu, J.-H., Lin, C.-S., Effect of fire on the residual mechanical properties and structural performance of reinforced concrete beams (2008) Journal of Fire Protection Engineering, 18 (4), pp. 245-274
Wald, F., Kallerova, P., (2009) Draft Summary of Results from Fire Test in Mokrsko 2008, , Prague: Ceska technika
(2004) Seven Swiss Firefighters Die in Collapsed Parking Garage, , http://www.firehouse.com/news/lodd/seven-swiss-firefighters-die- collapsed-parking-garage, Firehouse.com Accessed on 9 September 2011
(2002) Eurocode 1: Actions on Structures-Part 1-2: General Actions-Actions on Structures Exposed to Fire, , EN 1991-1-2 Brussels: CEN
Franssen, J.-M., SAFIR: A thermal/structural program for modeling structures under fire (2005) Engineering Journal-American Institute of Steel Construction Inc., 42 (3), pp. 143-158
(2005) Eurocode 4-Design of Composite Steel and Concrete Structures, , EN 1994-1-2 Part 1-2: General rules-Structural fire design. Brussels: CEN
(2004) Eurocode 2: Design of Concrete Structures-Part 1-2: General Rules-Structural Fire Design, , EN 1992-1-2 Brussels: CEN
Schneider, U., (1985) Properties of Materials at High Temperatures: Concrete, , RILEM, University of Kassel
Yi-Hai, L., Franssen, J.-M., Test results and model for the residual compressive strength of concrete after a fire (2011) Journal of Structural Fire Engineering, 2, pp. 29-44
Felicetti, R., Gambarova, P.G., Silva, M., Vimercati, M., Thermal diffusivity and residual strength of high-performance light-weight concrete exposed to high temperature (2002) 6th International Symposium on Utilization of HSC/HPC, Leipzig, Proc. V2, pp. 935-948
Gernay, T., Franssen, J.-M., A comparison between explicit and implicit modelling of transient creep strain in concrete uniaxial constitutive relationships (2011) Proceedings of the Fire and Materials 2011 Conference, pp. 405-416. , San Francisco
Gernay, T., Effect of transient creep strain model on the behavior of concrete columns subjected to heating and cooling Fire Technology
