| 张玉琢,刘海卿,吕学涛.内配圆钢管的SRC短柱耐火极限分析[J].火灾科学,2016,25(2):87-92. |
| 内配圆钢管的SRC短柱耐火极限分析 |
| Fire resistance of steel reinforced concrete column with inner circular steel tube |
| 投稿时间：2016-01-12 修订日期：2016-03-04 |
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| DOI：10.3969/j.issn.1004-5309.2016.02.05 |
| 基金项目:国家自然科学基金资助项目（51208246）；辽宁工程技术大学拔尖人才提升计划项目(20130309) |
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| 中文关键词: 内配圆钢管的SRC柱 耐火极限 温度场 数值模拟 参数分析 |
| 英文关键词:Steel reinforced concrete (SRC) column with inner circular steel tube Fire resistance limit Temperature field Numerical simulation Parameter study |
| 摘要点击次数: 228 |
| 全文下载次数: 291 |
| 中文摘要: |
| 建立了四周受火的内配圆钢管SRC短柱抗火分析有限元模型，采用大量耐火试验数据验证模型的合理性，在此基础上，对不同荷载比、截面周长、长细比、荷载偏心率及含钢率共115种工况下耐火极限进行参数分析，得到了内配圆钢管SRC短柱耐火极限的主要影响参数及其影响规律，在此基础上，回归出内配圆钢管SRC短柱耐火极限简化计算公式。研究结果表明：影响内配圆钢管SRC短柱耐火极限数值的重要因素有荷载比、截面周长和长细比，具体表现为耐火极限与截面尺寸呈正相关，与荷载比和长细比呈负相关；该耐火极限简化计算公式可供实际工程参考。 |
| 英文摘要: |
| A nonlinear finite element model was developed to analyze the fire resistance of SRC (steel reinforced concrete) columns with inner circular steel tube subject to the around-face heating, which was validated by a number of experiment results of concrete shaped columns. On the basis of the program, parametric analysis of the fire resistance limit of SRC columns with inner circular steel tube was conducted，and 115 hypothetical cases were analyzed for various parameters, including the load ratio, sectional perimeter, slenderness ratio, loading eccentricity and the area ratio of steel inner concrete. Key parameters and their effects were obtained from the simulation results, and a simplified calculation formula for predicting the fire resistance limit was given. The analysis results indicate that the load ratio, sectional perimeter and slenderness ratio are main parameters that influence the fire resistance limit of SRC columns with inner circular steel tube columns, and the fire resistance limit increases with the increase of the sectional dimensions and with the decrease of the load ratio and the slenderness ratio. The simplified calculated method in this paper can be used as a reference of fire resistance design of SRC columns. |
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