Overall Stability Design of Restrained HSection Steel Columns under Axial Load in Fire

WANG Peijun; LI Guoqiang; WANG Yongchang

doi:10.11835/j.issn.1674-4764.2009.04.007

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Overall Stability Design of Restrained HSection Steel Columns under Axial Load in Fire

更新时间：2023-11-28

- Overall Stability Design of Restrained HSection Steel Columns under Axial Load in Fire
- Journal of Civil and Environmental Engineering Vol. 31, Issue 4, Pages: 31-36(2009)
- 作者机构：
  
  1. 山东大学土建与水利学院土木工程系,济南,250061
  2. 土木工程防灾国家重点试验室,上海,200092
  3. 同济大学土木工程学院建筑工程系,上海,200092
  5. School of Mechanical, Aerospace and Civil Engineering, University of Manchester, PO Box88,Manchester,M60 1QD
- 作者简介：
- 基金信息：
- DOI：10.11835/j.issn.1674-4764.2009.04.007
  CLC：
- Published：2009
- 稿件说明：
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WANG Peijun, LI Guoqiang, WANG Yongchang. Overall Stability Design of Restrained HSection Steel Columns under Axial Load in Fire[J]. Journal of Civil and Environmental Engineering, 2009, 31(4): 31-36.
DOI：

WANG Peijun, LI Guoqiang, WANG Yongchang. Overall Stability Design of Restrained HSection Steel Columns under Axial Load in Fire[J]. Journal of Civil and Environmental Engineering, 2009, 31(4): 31-36. DOI： 10.11835/j.issn.1674-4764.2009.04.007.

摘要

利用验证的有限元模型分析了轴向约束刚度比、轴力荷载比和钢柱长细比对火灾下轴心受压H形截面约束钢柱屈曲温度和破坏温度的影响，给出了其屈曲温度和破坏温度的计算方法。轴向约束刚度比对约束钢柱屈曲温度和破坏温度的影响可用指数函数表示，轴力荷载比和钢柱长细比对约束钢柱屈曲温度和破坏温度的影响可用多项式表示。采用有限元方法对计算公式进行了验证，设计公式计算结果与有限元分析结果吻合较好，且设计公式给出偏于安全的结果。

Abstract

The effects of the restraint stiffness ratio

the axial load ratio and the column slenderness on the buckling temperature and failure temperature of a restrained Hsection steel column under axial load in fire were studied with a calibrated finite element method (FEM) model. And the calculation methods of buckling temperature and failure temperature were proposed. The effect of the restraint stiffness ratio on the buckling temperature and failure temperatures could be expressed with an exponent curve while polynomial functions was appropriate for the effects of the axial load ratio and the column slenderness. The results of the proposed method were in good agreement with those by FEM method and on the safe side.

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