Application Of A Zone Model To The Simulation Of Heat Transfer In Fire Resistance Furnaces Piloted With Thermocouples Or Plate Thermometers

Fromy, Philippe; Curtat, M.

doi:10.3801/iafss.fss.6-531

Cited by 5 publications

(3 citation statements)

References 5 publications

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“…Furthermore, numerous authors have suggested replacing a prescribed time-history of temperature when describing a fire with a time-history of incident radiant heat flux (e.g. [11,14,54,56,61,[75][76][77][78]). This is the approach taken in the current research.…”

Section: Control By Incident Radiant Heat Fluxmentioning

confidence: 99%

A Heat-Transfer Rate Inducing System (H-TRIS) Test Method

Maluk

Bisby

Krajcovic

et al. 2019

Fire Safety Journal

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a b s t r a c t A novel fire testing method, named the Heat-Transfer Rate Inducing System (H-TRIS), is presented and described in this paper. The method directly controls the thermal boundary conditions imposed on a test specimen by controlling a specified time-history of incident radiant heat flux at its exposed surface. Accounting for the absorptivity and thermal losses at the exposed surface of the test specimen, H-TRIS can be programmed to control the net heat flux at the exposed surface; thus controlling the in-depth time dependent temperature distributions within the test specimen. H-TRIS can be used for imposing a wide range of time-histories of incident radiant heat flux (e.g. constant, linear, stepped), or in-depth time dependent temperature distributions (i.e. specified thermal gradients). Notably, this enables simulation of thermal boundary conditions experienced by materials or structures exposed to any source of heatduring a conventional fire test (e.g. standard furnace test), a large-scale fire test, a real fire, or some other thermal boundary conditions calculated using a fire model (e.g. zone or computational fluid dynamics model). H-TRIS enables complementary experimental studies with excellent repeatability at comparatively low economic and temporal costs relative to traditional furnace test methods, thus permitting multiple repeat tests and statistical studies of response to heating. Application of H-TRIS within a research project studying heat-induced concrete spalling is briefly presented and discussed, to illustrate the significance and novelty of the new fire testing method.

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Section: Control By Incident Radiant Heat Fluxmentioning

confidence: 99%

A Heat-Transfer Rate Inducing System (H-TRIS) Test Method

Maluk

Bisby

Krajcovic

et al. 2019

Fire Safety Journal

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show abstract

“…Furthermore, the ECHAFO software (e.g. see Fromy and Curtat 1999) developed in order to model thermal exchanges in re resistance furnaces, allows us to perform the calculation of the total heat ux received by the specimen surface at dierent time steps of conventional re resistance test. First, one characterizes the incidental heat ux received by a uxmeter at dierent distances from the radiant panel and then, the cart displacement program is found out in order to reproduce by means of the TLB the incidental heat ux calculated by ECHAFO.…”

Section: Thermal Load Bench (Tlb)mentioning

confidence: 99%

Probabilistic Uncertainty Modeling for Thermomechanical Analysis of Plasterboard Submitted to Fire Load

2008

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The paper deals with a probabilistic modeling of the thermo-mechanical behavior of cardboard-plaster-cardboard (CPC) multilayer plates submitted to re load. The proposed model takes into account data and model uncertainties. This work is justied by the fact that re resistance tests of plasterboard-lined partitions are made impossible when their dimensions exceed those of furnaces. A fundamental key to solve such a problem is the development and the experimental validation of a deterministic and probabilistic model of CPC multilayer submitted to re load. The rst step of this work concerns the constitution of an experimental thermo-mechanical data base for a CPC multilayer and for its components. These experimental tests are carried out by the use of a bench test specially designed for this work. The second step is the development of an homogenization thermo-mechanical mean model for the CPC multilayer. The third step is the development of a probabilistic model of uncertainties based on the

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“…The combination of a heat source used in its steady state and a specimen movement controlled with a millimeter precision insures an excellent reproducibility on the thermal load. Furthermore the ECHAFO software [5] developed in order to model thermal exchanges in fire resistance furnaces, allows us to perform the calculation of the total heat flux received by the specimen surface at different time steps of conventional fire resistance test. First, one characterizes the incidental heat flux received by a fluxmeter at different distances from the radiant panel and then the cart displacement program is find out in order to reproduce by means of the TLB the incidental heat flux calculated by ECHAFO.…”

Section: Thermal Load Bench (Tlb)mentioning

confidence: 99%