华南理工大学学报(自然科学版) ›› 2006, Vol. 34 ›› Issue (11): 64-69.

• 土木建筑工程 • 上一篇    下一篇

高强混凝土柱的耐火极限

吴波1 洪洲2   

  1. 1.华南理工大学 建筑学院,广东 广州 510640;2,广州市建工设计院,广东 广州 510030
  • 收稿日期:2005-12-01 出版日期:2006-11-25 发布日期:2006-11-25
  • 通信作者: 吴波(1968-),男,研究员。博士生导师,主要从事结构抗震、抗火研究 E-mail:bowu@scut.edu.cn
  • 作者简介:吴波(1968-),男,研究员。博士生导师,主要从事结构抗震、抗火研究
  • 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项目(NCET-04-0819);广东省自然科学基金资助项目(031409)

Fire Resistance of High-Strength Concrete Column

Wu Bo1  Hong Zhou2   

  1. 1.School of Architecture and Civil Engineering,South China Univ.of Tech.,Guangzhou 510640,Guangdong,China;2.Guangzhou Architectural Engineering Design Institute,Guangzhou 510030,Guangdong,China
  • Received:2005-12-01 Online:2006-11-25 Published:2006-11-25
  • Contact: 吴波(1968-),男,研究员。博士生导师,主要从事结构抗震、抗火研究 E-mail:bowu@scut.edu.cn
  • About author:吴波(1968-),男,研究员。博士生导师,主要从事结构抗震、抗火研究
  • 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项目(NCET-04-0819);广东省自然科学基金资助项目(031409)

摘要: 编制了高强混凝土柱高温反应的全过程分析程序,程序中近似考虑了高强混凝土的爆裂效应,程序的有效性得到了其他学者试验结果的验证.针对不同轴压比、截面尺寸、配筋率和荷载偏心率共480种工况进行了高强混凝土柱的高温反应分析,揭示了各主要参数对高强混凝土柱耐火极限的影响规律,并与普通混凝土柱的相应结果进行了对比.基于计算结果定量给出了高强混凝土柱耐火极限的简化确定方法.研究结果表明,高温爆裂对高强混凝土柱的耐火极限影响显著;严格控制轴压比和荷载偏心率、保证足够的截面尺寸,是提高高强混凝土轴压柱和偏压柱耐火极限的有效措施.

关键词: 高强混凝土, 柱, 高温, 耐火极限, 爆裂

Abstract:

A full-process analytical proposed,in which the effect of expl bility of the program is validated by parameters on the fire resistances of program for high-strength concrete columns subjected to high temperature is osive spalling of high-strength concrete is approximately considered.The relia-the test results of other researchers.In order to reveal the effects of the main high-strength concrete columns.480 specimens with different axial loading ratios,cross-section dimensions,reinforcement ratios and load eccentricity ratios are selected to analyze the high-tem-perature reaction of the high·strength concrete columns.The results are then compared with those of common con-crete columns.Moreover,a simplified way to quantitatively determine the fire resistance of high-strength concrete columns is presented based on the simulated results.It is indicated that the explosive spalling has significant influence on the fire resistance of high-strength concrete columns,and that the fire resistance of the high-strength concrete columns with both central axial loading and eccentric axial loading can be effectively improved by reducing the axial loading ratio and the load eccentricity ratio,and by increasing the cross-section dimension.

Key words: high-strength concrete, column, high temperature, fire resistance, explosive spalling