TY - JOUR
T1 - Robustness of multi-storey car parks under vehicle fire
AU - Fang, C.
AU - Izzuddin, B. A.
AU - Obiala, R.
AU - Elghazouli, A. Y.
AU - Nethercot, D. A.
N1 - Funding Information:
The authors acknowledge the financial support of the Research Fund for Coal and Steel of the European Community within project ROBUSTFIRE: “Robustness of Car Parks against Localised Fire” , grant no RFSR-CT-2008-00036 . The related discussions and input of our collaborators from the University of Liège, University of Coimbra, CSTB, Greisch Ingénierie, and CTICM are gratefully acknowledged.
PY - 2012/8
Y1 - 2012/8
N2 - While recent studies on structures subject to fire have focused on individual structural members, sub-frames, or entire structures, issues of robustness due to the possible loss of columns exposed to fire have received less attention. This paper is concerned with the realistic modelling of a multi-storey car park under a vehicle fire scenario occurring near an internal column, where emphasis is given to the robustness and ductility response of the floor systems subsequent to column buckling. To address this, a detailed heat transfer analysis according to the proposed fire scenario is conducted to obtain realistic temperature distributions within the structure. For the subsequent structural analysis, two structural models with different modelling sophistications are established, namely, a detailed slab model and a simplified grillage model. Dynamic analysis is performed to trace potential dynamic effects, where the inelastic joint response is considered in detail for the purpose of robustness assessment. Based on the undertaken nonlinear analysis, three major failure modes, specifically single-span failure, double-span failure, and shear failure, are identified which can potentially trigger progressive collapse. Finally, the significance of dynamic effects along with column buckling under fire is evaluated, where it is found that the actual ductility demands fall between two idealised extreme cases, namely 'static column loss' and 'sudden column loss'.
AB - While recent studies on structures subject to fire have focused on individual structural members, sub-frames, or entire structures, issues of robustness due to the possible loss of columns exposed to fire have received less attention. This paper is concerned with the realistic modelling of a multi-storey car park under a vehicle fire scenario occurring near an internal column, where emphasis is given to the robustness and ductility response of the floor systems subsequent to column buckling. To address this, a detailed heat transfer analysis according to the proposed fire scenario is conducted to obtain realistic temperature distributions within the structure. For the subsequent structural analysis, two structural models with different modelling sophistications are established, namely, a detailed slab model and a simplified grillage model. Dynamic analysis is performed to trace potential dynamic effects, where the inelastic joint response is considered in detail for the purpose of robustness assessment. Based on the undertaken nonlinear analysis, three major failure modes, specifically single-span failure, double-span failure, and shear failure, are identified which can potentially trigger progressive collapse. Finally, the significance of dynamic effects along with column buckling under fire is evaluated, where it is found that the actual ductility demands fall between two idealised extreme cases, namely 'static column loss' and 'sudden column loss'.
KW - Ductility
KW - Fire
KW - Multi-storey car park
KW - Numerical modelling
KW - Progressive collapse
KW - Robustness
UR - http://www.scopus.com/inward/record.url?scp=84860514417&partnerID=8YFLogxK
U2 - 10.1016/j.jcsr.2012.03.004
DO - 10.1016/j.jcsr.2012.03.004
M3 - Journal article
AN - SCOPUS:84860514417
SN - 0143-974X
VL - 75
SP - 72
EP - 84
JO - Journal of Constructional Steel Research
JF - Journal of Constructional Steel Research
ER -