Journal of South China University of Technology (Natural Science Edition) ›› 2009, Vol. 37 ›› Issue (9): 1-6.

• Architecture & Civil Engineering •     Next Articles

Influence of Random Characteristics of Strengths of Steel Bar and Concrete on Fire Resistance of Column at High Temperature

Wu Bo  Liang Yue-huan   

  1. State Key Laboratory of Suhtropical Building Science, South China University of Technology, Guangzhou 510640, Guangdong,, China
  • Received:2008-09-05 Revised:2009-01-13 Online:2009-09-25 Published:2009-09-25
  • Contact: 吴波（1968-），男，研究员，博士生导师，主要从事结构抗灾研究． E-mail:bowu@scut．edu．cn
  • About author:吴波（1968-），男，研究员，博士生导师，主要从事结构抗灾研究．
  • Supported by:

    国家自然科学基金重点资助项目（50738005）;国家科技支撑计划子课题（2006BAJ03A03-12）;教育部“新世纪优秀人才支持计划”资助项目（CET-04-0819）;亚热带建筑科学国家重点实验室重点研究项目（2008ZA10）

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Abstract:

In order to reveal the influence of random characteristics of the relative steel bar/concrete strength on the fire resistance of column at a high temperature,the fire resistance of column is calculated according to the average curve of the relative strength versus the temperature.The results show that,with the increase in the eccentricity ratio of load,the effect of the random characteristics of the relative yield strength of steel bar at a high temperature on the fire resistance of column continuously improves and the variance coefficient of the fire resistance of column gradually increases from 0. 003 to about 0. 060, that, though the influence of the random characteristics of relative strength of concrete at a high temperature continuously decreases, the variance coefficient of the fire resistance of column averages out at about 0. 050, and that the fire resistance of column distributes in a normal mode.

Key words: concrete, steel bar, column, strength, high temperature, fire resistance, random characteristic