Analysis of Fire Resistance Performance of Steel‑timber Composite Columns

GAO Luqiao; LI Guoqiang; ZHENG Xiuzhi; LIU Bing

doi:10.13409/j.cnki.jdpme.20240923003

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Analysis of Fire Resistance Performance of Steel‑timber Composite Columns

更新时间：2026-04-15

- Analysis of Fire Resistance Performance of Steel‑timber Composite Columns
- Journal of Disaster Prevention and Mitigation Engineering Vol. 46, Issue 2, Pages: 313-324(2026)
- 作者机构：
  
  1.同济大学土木工程学院，上海 200092
  2.同济大学土木工程防灾减灾全国重点实验室，上海 200092
  3.同济大学建筑设计研究院（集团）有限公司，上海 200092
- 作者简介：
- 基金信息：
- DOI：10.13409/j.cnki.jdpme.20240923003
  CLC： TU398.9
- Received：23 September 2024，
  
  Revised：2024-11-20，
  
  Published：28 April 2026
- 稿件说明：
移动端阅览
高路巧,李国强,郑修知等.钢‑木组合柱抗火性能分析研究[J].防灾减灾工程学报,2026,46(02):313-324.

GAO Luqiao,LI Guoqiang,ZHENG Xiuzhi,et al.Analysis of Fire Resistance Performance of Steel‑timber Composite Columns[J].Journal of Disaster Prevention and Mitigation Engineering,2026,46(02):313-324.
高路巧,李国强,郑修知等.钢‑木组合柱抗火性能分析研究[J].防灾减灾工程学报,2026,46(02):313-324. DOI： 10.13409/j.cnki.jdpme.20240923003.

GAO Luqiao,LI Guoqiang,ZHENG Xiuzhi,et al.Analysis of Fire Resistance Performance of Steel‑timber Composite Columns[J].Journal of Disaster Prevention and Mitigation Engineering,2026,46(02):313-324. DOI： 10.13409/j.cnki.jdpme.20240923003.

摘要

钢‑木组合柱是一种绿色低碳、承载高效的新型装配式构件，其抗火性能研究显著缺乏。采用数值分析方法对钢‑木组合柱的抗火性能开展研究。首先建立了考虑热力耦合效应的钢‑木组合柱抗火性能数值分析模型，利用火灾试验数据验证了数值模型的准确性。随后基于验证的数值分析模型对钢‑木组合柱的抗火性能进行模拟，揭示了其轴向位移、受火破坏模式和耐火极限，并与纯钢（木）柱进行对比。最后，通过参数分析探究了木材密度、含水率、包覆木材厚度和含钢率对钢‑木组合柱耐火极限的影响规律。结果表明：荷载比较小的组合柱轴向变形以热膨胀变形为主，而荷载比较大的组合柱轴向变形以受压变形为主。火灾下轴压钢‑木组合柱的破坏模式主要有两种，长细比较小的短柱主要发生强度破坏，长细比较大的长柱和细长柱，均发生整体屈曲破坏。荷载比和长细比对钢‑木组合柱的耐火极限影响显著，木材密度、含水率、包覆木材厚度和含钢率对钢‑木组合柱耐火极限亦有较大影响，但对短柱和长柱的影响趋势不同。此外，钢‑木组合柱的耐火极限大于纯钢（木）柱，且荷载比越小，钢‑木组合柱耐火极限的提高幅度越大。

Abstract

Steel-timber composite columns are a new type of prefabricated component that is green

low-carbon

and highly efficient in load-bearing. However

research on their fire resistance performance remains notably limited. Numerical analysis methods were employed to investigate the fire resistance performance of steel-timber composite columns. Firstly

a numerical analysis model for the fire resistance performance of steel-timber composite columns considering thermal coupling effects was established. The accuracy of the numerical model was then verified using fire test data. Subsequently

based on the validated numerical analysis model

the fire resistance performance of steel-timber composite columns was simulated. Their axial displacement

fire-induced failure mode

and fire resistance were revealed and compared with those of pure steel (timber) columns. Finally

parameter analysis was conducted to investigate the effects of timber density

moisture content

encasing timber thickness

and steel ratio on the fire resistance of steel-timber composite columns. The results indicated that for composite columns with low load ratios

axial deformation was dominated by thermal expansion

whereas for those with high load ratios

axial deformation was dominated by compressive deformation. There were mainly two failure modes of axially loaded steel-timber composite columns under fire conditions. Short columns with small slenderness ratios primarily underwent strength failure

while long and slender columns with large slenderness ratios both experienced overall buckling failure. The load ratio and slenderness ratio significantly influenced the fire resistance of steel-timber composite columns. Timber density

moisture content

encasing timber thickness

and steel ratio also had a significant impact on the fire resistance of steel-timber composite columns

but their influence trends differed between short and long columns. In addition

the fire resistance of steel-timber composite columns exceeded that of pure steel (timber) columns

and the smaller the load ratio

the greater the increase in the fire resistance of the steel-timber composite columns.

关键词

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references

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