| 结构中的钢筋混凝土柱耐火性能理论研究 |
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| 引用本文： | 宋晓勇,邹银生,涂文戈.结构中的钢筋混凝土柱耐火性能理论研究[J].铁道科学与工程学报,2005,2(5):36-40. |
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| 作者姓名： | 宋晓勇 邹银生 涂文戈 |
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| 作者单位： | 湖南大学,结构工程研究所,湖南,长沙,410082;湖南大学,结构工程研究所,湖南,长沙,410082;湖南大学,结构工程研究所,湖南,长沙,410082 |
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| 摘 要： | 建立了一个理想的完全约束的钢筋混凝土柱模型,并采用这个模型对实际结构中轴心受压柱的耐火极限进行了预测和分析.研究结果表明,在截面尺寸、纵筋配筋率、保护层厚度及混凝土抗压强度等诸多因素中,保护层厚度是影响实际结构中轴心受压柱的耐火极限的最主要因素.而我国现行的设计防火规范是以截面尺寸为主要指标对钢筋混凝土柱的耐火极限进行规定,因此,建议我国的设计防火规范对钢筋混凝土柱的耐火极限进行规定时加入对保护层厚度的要求,同时建议加入防止柱表面爆裂的措施.
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| 关 键 词： | 约束 钢筋混凝土 柱 耐火极限 |
| 文章编号： | 1672-7029(2005)05-0036-05 |
| 收稿时间： | 2005-07-13 |
| 修稿时间： | 2005年7月13日 |
Theoretical study of fire resistance of reinforced concrete columns |
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| SONG Xiao-yong,ZOU Yin-sheng,TU Wen-ge.Theoretical study of fire resistance of reinforced concrete columns[J].Journal of Railway Science and Engineering,2005,2(5):36-40. |
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| Authors: | SONG Xiao-yong ZOU Yin-sheng TU Wen-ge |
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| Institution: | Institute of Structural Engineering, Hunan University, Changsha 410082, China |
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| Abstract: | An ideal model of a totally restrained reinforced concrete column is proposed in this paper. Based upon the model, the limit of fire resistance of a restrained column in a system is predicted and analyzed. It is concluded that the concrete cover is the main factor affecting the limit of fire resistance of reinforced concrete columns under axial load. So it is suggested that code of China for fire protection design take the concrete cover into consideration on the regulation of reinforced concrete columns. And the regulations on preventing fire - exposed concrete from spalling should be included. |
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| Keywords: | restraint reinforced concrete columns limit of fire resistance |
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