Thermo-mechanical Model Of A
Cardboard-plaster-cardboard Composite Plate
Submitted To Fire Load And Experiments
Author(s)
S. Sakji, C. Soize & J. V. Heck
Abstract
Generally, the standard rules require conventional tests at scale one in order to
justify the fire resistance of loaded plasterboard-lined partitions. This paper corresponds
to a project whose objectives are to develop a numerical simulation
model validated with experiments in order to predict thermo-mechanical overall
partition behaviour. This research is organized in four steps. The first step is to
set on an experimental thermo-mechanical data base for multilayer cardboardplaster-
cardboard(CPC). These tests are carried out using a new testing bench
specially developed for this research. A full description of this device is given
in the paper. In order to prepare the implementation of a probabilistic model for
the CPC multilayer, several tests are performed for different thermo-mechanical
configurations. The second step of the research is the development of a complete
thermo-mechanical model for CPC multi-layer plates. The developed model is
adapted to a range of temperatures for which the cardboard and the plaster can
be destroyed. The mathematical-mechanical model has been developed in order to
simulate the thermo-mechanical behaviour of the CPC panels subjected to a heat
flow corresponding to the ISO 834 function. Numerical simulations performed
with a dedicated finite element code are presented. The third step is the identifi-
cation of the thermo-mechanical parameters for each material of the CPC plasterboard.
Thermo-mechanical bending tests for plaster and thermo-mechanical tensile
tests for each cardboard are performed. Results show an important dispersal of
the Young modulus which will justify the implementation of a probabilistic model
which is still in progress. The fourth step consists in comparing numerical results
to the thermo-mechanical experiments of step one and to validate the developed
model.
Keywords: thermo-mechanical model, cardboard-plaster-cardboard composite
plate, fire engineering, high light-framed walls.
Keywords
thermo-mechanical model, cardboard-plaster-cardboard composite
plate, fire engineering, high light-framed walls.
Related Book
Other papers in this volume
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