Coupled CFD and FE Simulations of Structures under Fire

 

Dr. Rami Haj-Ali, Georgia Tech, 404-894-4716, rami.haj-ali@ce.gatech.edu

Joonho Choi, Georgia Tech, 404-894-9354, joonho.choi@ce.gatech.edu

 

 

 

Objectives and Approach

 

 

 

  • Generate refined models of metallic, concrete, and FRP composite structures under fire. 
  • Use CFD analysis for fire simulation coupled with FE software for thermomechanical behavior
  • Examine different methods for integrating the CFD and FE boundary in coupled value problems.

 

 

 

 

 

Summary

 

 

 

  A three dimensional combined fire-structural analysis and simulations approach is proposed for both metallic and FRP composite materials, concrete, and structures.  The use of temporal-spatial approximation to represent the spatial history of the temperature profiles is an important aspect of the coupled problem.  The proposed 3D modeling approach is general and allows investigating different aspects of structural performance under fire.  Modeling damage and connection behavior under fire can be addressed using the proposed approach.

 

 

 

 

 

Examples

 

 

 

 

 

  • Bridge – I ( Steel and Concrete Based )

 

 

 

 

High Quality movie

 

 

HRRPUV

(Heat Release Rate Per Unit Volume)

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Surface Temperature

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  • Bridge – II ( Steel and Concrete Based ) 

 

 

 

 

High Quality movie

 

 

HRRPUV

(Heat Release Rate Per Unit Volume)

Download or run

 

 

Surface Temperature

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  • Ship 

 

 

 

 

High Quality movie

 

 

HRRPUV

(Heat Release Rate Per Unit Volume)

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Von Mises Stress

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·        Three story apartment building

 

 

 

 

High Quality movie

 

 

HRRPUV

(Heat Release Rate Per Unit Volume)

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Surface Temperature

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Equivalent Plastic Strain

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Von Mises Stress

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·        Cardington Fire test - test #4

 

 

 

 

High Quality movie

 

 

HRRPUV

(Heat Release Rate Per Unit Volume)

Download or run

 

 

Surface Temperature

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Deformation - Abaqus

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