Performance of concrete-filled steel tubular column-wall structure subjected to ISO-834 standard fire: analytical behaviour

Jia Qi Liu, Lin Hai Han, Xiao Ling Zhao

Research output: Journal article publicationJournal articleAcademic researchpeer-review

19 Citations (Scopus)

Abstract

Concrete-filled steel tubular (CFST) column-wall has a promising prospect in the construction field, especially for multi-story residential buildings. It is very important to have a thorough understanding of its mechanical behaviour and fire resistance. This is a companion paper that carries forward the work by the authors [1]. The previous paper focused on full-scale testing to determine the fire resistance of CFST column-wall, whereas this paper deals with finite element analysis and simplified design method for such composite structural elements. Heat transfer mechanism was analysed by comparing the temperature distributions of CFST column-wall sections with different fire exposures. Structural analysis, such as internal force distribution, strain and stress of different components, interfacial behaviour between steel and concrete was given to describe the deformation behaviour and failure mechanism of CFST column-wall. Based on the FEA model, parametric analysis was carried out to investigate the influence of geometric, load and physical parameters on the fire resistance of CFST column-wall. Since no specific design rules can be found for CFST column-walls, a simplified fire design method was proposed in this paper to calculate the fire resistance of CFST column-wall structure.

Original languageEnglish
Pages (from-to)28-44
Number of pages17
JournalThin-Walled Structures
Volume129
DOIs
Publication statusPublished - Aug 2018
Externally publishedYes

Keywords

  • Column-wall
  • Concrete filled steel tubes (CFST)
  • FEA analysis
  • Fire resistance
  • Parametric analysis
  • Simplified design method
  • Temperature distribution

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Mechanical Engineering

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