Coupled CFD-FE analysis of a long-span truss beam exposed to spreading fires

Janardhan, Rahul Kallada; Shakil, Saani; Lü, Wei; Hostikka, Simo; Puttonen, Jari

doi:10.1016/j.engstruct.2022.114150

Cited by 7 publications

(13 citation statements)

References 24 publications

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“…Different fire intervention tactics were defined based on the discussions with firefighters from the Emergency Services Academy in Finland. The fire development and the selected ways of using water monitors were simulated using the modelling methods developed in [18] and [19] in Fire Dynamics Simulator (FDS) [28,30]. The fire performance of a truss exposed to fire and spray cooling is analysed using the Finite Element (FE) solver, Abaqus [29].…”

Section: Fire Technology 2022mentioning

confidence: 99%

“…T AST is transferred from FDS to Abaqus using a procedure called node set-todevice (NSET-DEVC) mapping and is explained in detail in [19]. The T AST values in the fire simulation are recorded at several discrete locations along the structure and then assigned to specific node sets of the Abaqus model.…”

Section: Unidirectional Coupling Using Fds2femmentioning

confidence: 99%

“…The computational cost of this approach is low, as the amount of transferred data is small, but the accuracy of the transferred boundary condition is limited by the resolution of T AST data points. The sensitivity of the predicted structural response on the mapping resolution during flame heating was investigated in [19].…”

Section: Unidirectional Coupling Using Fds2femmentioning

confidence: 99%

“…17. A detailed description of the modelling and the structural analysis of the heating phase is reported in [19].…”

Section: Fire Developmentmentioning

confidence: 99%

“…One way of studying real-scale fire interventions is through coupled numerical simulations of manual fire suppression and their influence on structural behaviour. The current state-of-the-art Computational Fluid Dynamics (CFD) modelling has been shown to reproduce the fire behaviour observed in a large compartment [18], and the coupled fire-structure interaction methodology, validated in [19], can then be extended for studying the response of the heated and cooled structural elements. In between these two steps of simulation, a water spray model needs to be included.…”

Section: Introductionmentioning

confidence: 99%

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Impact of Firefighting Sprays on the Fire Performance of Structural Steel Members

et al. 2022

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The feasibility of coupled computational fluid dynamics (CFD) and finite element (FE) simulations to aid the planning of fire intervention tactics and the effectiveness of structural cooling during firefighting were investigated. Water sprays, generated using fire monitors, were characterized using bucket tests and the results were used for calibrating the CFD spray model. The cooling ability of the sprays was measured experimentally by applying them onto a fire exposed steel beam. The experimental results showed that water application produces a sudden drop in steel temperatures and after 10–15 s, no significant further reduction in temperature was observed. The CFD-FE coupling was performed using the adiabatic surface temperature method, extended here to include the cooling by water droplets. The coupled CFD-FE model was validated using the experimental data and applied to simulate the intervention to a developing warehouse fire, showing how an attempt to cool the structure reduces the temperatures but does not stall the fire-spread. In fact, the intervention -induced vapor generation was found to enhance the flow of hot gases and accelerate the fire-spread if the water resources are inadequate. Thermal and stress analyses of the cooled and uncooled truss beams were performed, showing how the spray cooling halted the truss mid-span deformation.

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Section: Fire Technology 2022mentioning

confidence: 99%

Section: Unidirectional Coupling Using Fds2femmentioning

confidence: 99%

Section: Unidirectional Coupling Using Fds2femmentioning

confidence: 99%

“…17. A detailed description of the modelling and the structural analysis of the heating phase is reported in [19].…”

Section: Fire Developmentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Impact of Firefighting Sprays on the Fire Performance of Structural Steel Members

et al. 2022

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Assessment of the Mechanical Strength of a Structure Subject Fo Fire Attack at the Wildland‐urban Interface (Wui)

Fiorini,

Craveiro,

Santiago

2024

ce papers

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Fires at the Wildland‐Urban Interface (WUI) have a strong detrimental impact on the built environment. This study evaluates the effect of fire in the WUI on steel sandwich panels in a prescriptive fire field experience. The heat transfer mechanisms are obtained using a computational fluid dynamic (CFD) simulation, more specifically the adiabatic surface temperatures (AST) of the structure. The ASTs were applied in a finite element model (FEM) as boundary conditions in the thermal field in order to quantify the heat transfer processed by the FEM. In conclusion, it is identified which area of the structure is most affected due to the temperatures in the panels.

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An Experiment on a Real Building with Truss Roof to Validate Real-Time Early-Warning System for Fire-Induced Collapse

Li,

Zhu

et al. 2024

Fire Technol

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Coupled CFD-FE analysis of a long-span truss beam exposed to spreading fires

Cited by 7 publications

References 24 publications

Impact of Firefighting Sprays on the Fire Performance of Structural Steel Members

Impact of Firefighting Sprays on the Fire Performance of Structural Steel Members

Assessment of the Mechanical Strength of a Structure Subject Fo Fire Attack at the Wildland‐urban Interface (Wui)

An Experiment on a Real Building with Truss Roof to Validate Real-Time Early-Warning System for Fire-Induced Collapse

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