Reference : A Novel Methodology for Hybrid Fire Testing
Scientific congresses and symposiums : Paper published in a book
Engineering, computing & technology : Civil engineering
A Novel Methodology for Hybrid Fire Testing
Sauca, Ana mailto [Université de Liège > Département ArGEnCo > Ingénierie du feu >]
Gernay, Thomas mailto [Université de Liège > Département ArGEnCo > Ingénierie du feu >]
Robert, Fabienne mailto [CERIB > Fire Testing Center > > >]
Tondini, Nicola mailto [University of Trento, Italy > Departement of Civil, Environmental and Mechanical Engineering > > >]
Franssen, Jean-Marc mailto [Université de Liège > Département ArGEnCo > Ingénierie du feu >]
Proceedings of the 6th European Conference on Structural Control
6th European Conference on Structural Control
11-13 July 2016
Sheffield University
[en] Fire Testing ; Hybrid Methodology ; Physical Substructure ; Numerical Substructure
[en] This paper describes a novel methodology for conducting stable hybrid fire testing (HTF). During hybrid fire testing, only a part of the structure is tested in a furnace while the reminded structure is calculated separately, here by means of a predetermined matrix. Equilibrium and compatibility at the interface between the tested “physical substructure” and the “numerical substructure” is maintained throughout the test using a dedicated algorithm. The procedures developed so far are sensitive to the stiffness ratio between the physical and the numerical substructure and therefore they can be applied only in some cases. In fire field, the stiffness of the heated physical substructure may change dramatically and the resulting change in stiffness ratio can lead to instability during the test. To overcome this drawback, a methodology independent of the stiffness ratio has been developed, inspired from the Finite Element Tearing and Interconnecting (FETI) method, which has been originally developed for substructuring in numerical analyses. The novel methodology has been successfully applied to a hybrid fire test in a purely numerical environment, i.e. the physical substructure was also modelled numerically. It is shown that stability does not depend on the stiffness ratio and that equilibrium and compatibility can be consistently maintained at the interface during the fire. Finally, the ongoing experimental program aimed at employing and experimentally validating this methodology is described.

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