Simulation Methodology for Coupled Fire-Structure Analysis: Modeling Localized Fire Tests on a Steel Column

Chao Zhang, Julio G. Silva, Craig Weinschenk, Daisuke Kamikawa, Yuji Hasemi

    Research output: Contribution to journalArticle

    20 Citations (Scopus)

    Abstract

    Advanced simulation methods are needed to predict the complex behavior of structures exposed to realistic fires. Fire dynamics simulator (FDS) is a computational fluid dynamics code, developed by NIST for fire related simulations. In recent years, there has been an increase in use of FDS for performance-based analysis in the area of structural fire research. This paper discusses the FDS–finite element method (FEM) simulation methodology for structural fire analysis. The general methodology is described and a validation study is presented. A data element used to transfer data from FDS to FEM codes, the adiabatic surface temperature, is discussed. A tool named fire-thermomechanical interface is applied to transfer data from FDS to ANSYS. A high temperature stress–strain model for structural steel developed by NIST is included in the FEM analysis. Compared to experimental results, the FDS–FEM method predicted both the thermal and structural responses of a steel column in a localized fire test. The column buckling time was predicted with a maximum error of 7.8%. Based on these results, this methodology has potential to be used in performance-based analysis.

    Original languageEnglish
    Pages (from-to)239-262
    Number of pages24
    JournalFire Technology
    Volume52
    Issue number1
    DOIs
    Publication statusPublished - 2016 Jan 1

    Keywords

    • Adiabatic surface temperature
    • CFD-FEM simulation method
    • Finite element simulation
    • Fire dynamic simulator (FDS)
    • Fire-thermomechanical interface (FTMI)
    • Localized fires
    • Steel column
    • Structural fire analysis
    • Validation study

    ASJC Scopus subject areas

    • Safety, Risk, Reliability and Quality
    • Materials Science(all)

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