| 相邻两面受火和三面受火混凝土矩形柱的耐火极限研究 |
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| 引用本文： | 徐玉野,王全凤,柴振岭. 相邻两面受火和三面受火混凝土矩形柱的耐火极限研究[J]. 工程力学, 2008, 25(11) |
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| 作者姓名： | 徐玉野 王全凤 柴振岭 |
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| 作者单位： | 华侨大学土木工程学院,福建泉州362021 |
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| 基金项目： | 福建省青年科技人才创新基金，华侨大学校科研和教改项目 |
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| 摘 要： | 利用高温下钢筋混凝土柱基于虚梁法的数值模拟程序RCSSCF,分析了轴压比、计算长度、截面尺寸、荷载偏心率、配筋率和荷载角等参数对ISO834标准升温过程下相邻两面受火和三面受火钢筋混凝土矩形柱耐火极限的影响规律.针对不同轴压比、计算长度、截面尺寸、荷载偏心率、配筋率和荷载角等情况,共进行了9792种工况下相邻两面受火矩形柱的高温反应分析、11520种工况下三面受火矩形柱的高温反应分析.在计算结果的基础上,定量给出了相邻两面受火和三面受火钢筋混凝土矩形柱耐火极限的实用计算方法.研究表明:a) 严格控制轴压比是提高矩形柱耐火极限的有效措施;b) 荷载角对相邻两面受火和三面受火矩形柱的耐火极限影响较大;c) 随着轴压比的增大,相邻两面受火和三面受火矩形柱耐火极限的差异减小.
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| 关 键 词： | 钢筋混凝土 柱 耐火极限 矩形截面 受火方式 实用计算 |
FIRE RESISTANCE OF CONCRETE COLUMNS WITH RECTANGULAR CROSS SECTION SUBJECTED TO 2-ADJACENT-FACE AND 3-FACE HEATING |
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| XU Yu-ye,WANG Quan-feng,CHAI Zhen-ling. FIRE RESISTANCE OF CONCRETE COLUMNS WITH RECTANGULAR CROSS SECTION SUBJECTED TO 2-ADJACENT-FACE AND 3-FACE HEATING[J]. Engineering Mechanics, 2008, 25(11) |
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| Authors: | XU Yu-ye WANG Quan-feng CHAI Zhen-ling |
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| Affiliation: | College of Civil Engineering;Huaqiao University;Quanzhou;Fujian 362021;China |
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| Abstract: | Using a numerical program RCSSCF, this paper studies the influence of several parameters, such as axial load ratio, effective length, sectional dimension, load eccentricity ratio, reinforcement ratio and load angle, on the fire resistance of reinforced concrete columns with rectangular cross section subjected to the ISO834 standard fire and 2-adjacent-face, or 3-face heating. 9792 hypothetical cases of columns subjected to 2-adjacent-face heating, and 11520 hypothetical cases of columns subjected to 3-face ... |
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| Keywords: | reinforced concrete column fire resistance rectangular cross section fire exposure cases practical calculation |
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