FIRE RESISTANCE OF REINFORCED CONCRETE COLUMNS SUBJECTED TO 1-, 2-, AND 3-FACE HEATING
FIRE RESISTANCE OF REINFORCED CONCRETE COLUMNS SUBJECTED TO 1-, 2-, AND 3-FACE HEATING
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DOI：
10.1061/(asce)0733-9445(2004)130:11(1820
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发表时间：
2004-11
期刊：
影响因子：
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通讯作者：
K. Tan;Yao Yao-Yao
中科院分区：
文献类型：
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作者：
K. Tan;Yao Yao-Yao
目前，钢筋混凝土(RC)柱的设计基本上是基于表格数据。基于对柱在火灾中的基本行为的理解而采取的更科学的方法对结构工程师来说是有用的。Tan和姚在2003年提出了一种简单合理的设计方法来预测四面受热RC柱的耐火性能。该方法的预测结果与试验结果吻合较好。同样的方法可以推广到单面、双面和三面加热柱，但需要做一些修改。定量分析了温度升高对柱子强度和稳定性方面材料劣化的影响。此外，该方法还对非对称加热引起的中性轴移动进行了预测。对于单面和三面受热的柱子，只需要考虑单轴弯曲，而对于双面受热的柱子，则考虑了双向弯曲的影响。使用比利时列日大学开发的有限元程序ISAFIR\N对所提出的简化计算方法进行了基准测试。
Currently, the design of reinforced concrete (RC) columns is essentially based on tabulated data. A more scientific approach based on an understanding of the fundamental behavior of columns in fire is useful to structural engineers. Tan and Yao in 2003 developed a simple and rational design method to predict the fire resistance of 4-face heated RC columns. The predictions of the proposed method agree well with test results. The same method can be extended to 1-, 2-, and 3-face heated columns with some modifications. The effects of elevated temperature on material deterioration with regard to the strength and stability of columns are quantified. Furthermore, the shift of neutral axis due to nonsymmetric heating is predicted in the proposed method. For columns under 1- or 3-face heating, only uniaxial bending needs to be considered, but for 2-face heating, the effect of biaxial bending is taken into account. A finite element code \ISAFIR\N, developed at the University of Liege, Belgium, was used to benchmark the proposed simplified calculation method.