华南理工大学学报(自然科学版) ›› 2007, Vol. 35 ›› Issue (7): 110-115,130.

• 土木建筑工程 • 上一篇    下一篇

钢筋混凝土L 形柱的耐火极限

徐玉野 吴波   

  1. 华南理工大学 亚热带建筑科学国家重点实验室,广东 广州 510640
  • 收稿日期:2006-07-24 出版日期:2007-07-25 发布日期:2007-07-25
  • 通信作者: 吴波,教授,博士生导师. E-mail: bowu@ scut.edu. cn E-mail:yuyexu@hqu.edu.cn
  • 作者简介:徐玉野(1978-),男,在职博士生,华侨大学讲师,主要从事防灾工程研究.
  • 基金资助:

    国家自然科学基金资助项目(50478078) ;教育部新世纪优秀人才支持计划资助项目(NCET-04-0819)

Fire Resistance of Reinforced Concrete Column with L-Shaped Cross Section

Xu Yu-ye  Wu Bo   

  1. State Key Laboratory of Subtropic Architecture Science , South China Univ. of Tech. , Guangzhou 510640 , Guangdong , China
  • Received:2006-07-24 Online:2007-07-25 Published:2007-07-25
  • Contact: 吴波,教授,博士生导师. E-mail: bowu@ scut.edu. cn E-mail:yuyexu@hqu.edu.cn
  • About author:徐玉野(1978-),男,在职博士生,华侨大学讲师,主要从事防灾工程研究.
  • Supported by:

    国家自然科学基金资助项目(50478078) ;教育部新世纪优秀人才支持计划资助项目(NCET-04-0819)

摘要: 利用数值模拟程序RCSSCF ,分析了荷载比、柱计算长度、截面尺寸、荷载偏心率、配筋率和荷载角等参数对IS0834 标准升温过程作用下钢筋混凝土等肢L 形柱耐火极限的影响规律.针对不同荷载比、柱计算长度、截面尺寸、荷载偏心率、配筋率和荷载角共5400 种工况进行了四周受火时钢筋混凝土等肢L 形柱的高温反应分析.在此基础上,定量给出了该类构件耐火极限的实用计算方法.研究结果表明:荷载角对L 形柱耐火极限的影响较大,且影响规律较为复杂;严格控制荷载比是提高L 形柱耐火极限的有效措施.

关键词: 混凝土, 钢筋混凝土柱, 耐火极限, 计算L 形截面

Abstract:

Analyzed in this paper were the influences of several parameters , such as the load ratio , the effective column length , the sectional dimensions , the load eccentricity ratio , the reinforcement ratio and the loading angle on the fire resistance of reinforced concrete columns with L-shaped cross section exposed to the IS0834 standard fire , and 5400 columns subjected to fire in all sides were used to caπY out the fire response analyses , with the above- mentioned parameters being the variables. Based on the analytical results , a practical method to calculate the fire resistance of the column with L-shaped cross section was presented. The results show that the loading angle has significant and complicated effect on the fire resistance of the column , and that reducing the load ratio is an effective method to improve the fire resistance.

Key words: concrete, reinforced concrete column, fire resistance, calculation, L-shaped cross section