| 钢筋混凝土简支梁的耐火极限 |
| |
| 引用本文： | 吴波,洪洲.钢筋混凝土简支梁的耐火极限[J].华南理工大学学报(自然科学版),2006,34(7):82-87. |
| |
| 作者姓名： | 吴波 洪洲 |
| |
| 作者单位： | 华南理工大学,建筑学院,广东,广州,510640;广州市建工设计院,广东,广州,510030 |
| |
| 基金项目： | 国家自然科学基金;教育部跨世纪优秀人才培养计划;广东省自然科学基金 |
| |
| 摘 要： | 编制了普通／高强混凝土简支梁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．文中针对不同荷载比、混凝土保护层厚度、跨高比和配筋率共288种工况，进行普通／高强混凝土简支梁的高温反应分析，揭示了各主要参数对上述两类简支梁耐火极限的影响规律，并对两者进行对比．通过计算，定量地给出了两类简支梁耐火极限的简化确定方法．结果表明：高温爆裂对高强混凝土简支梁的耐火极限影响显著；严格控制荷载比和适当增加混凝土保护层厚度是提高普通／高强混凝土简支梁耐火极限的有效措施．
|
| 关 键 词： | 普通混凝土 高强混凝土 简支梁 高温 耐火极限 爆裂 |
| 文章编号： | 1000-565X（2006）07-0082-06 |
| 收稿时间： | 2005-09-30 |
| 修稿时间： | 2005-09-30 |
Fire Resistance of Simply-Supported Reinforced Concrete Beam |
| |
| Wu Bo,Hong Zhou.Fire Resistance of Simply-Supported Reinforced Concrete Beam[J].Journal of South China University of Technology(Natural Science Edition),2006,34(7):82-87. |
| |
| Authors: | Wu Bo Hong Zhou |
| |
| Institution: | 1 College of Architecture and Civil Engineering, South China Univ. of Tech. , Guangzhou 510640, Guangdong, China; 2. Guangzhou Architecture Engineering Design Institute, Guangzhou 510030, Guangdong, China |
| |
| Abstract: | A full-process analytical program for the simply-supported normal-strength concrete(NSC) and high-strength concrete(HSC) beams subjected to high temperature is proposed,in which the explosive spalling of HSC is approximately taken into consideration.The reliability of the program is validated by the test results provided by former researchers.Then,the effects of the main parameters on the fire resistance of simply-supported NSC and HSC beams are investigated and compared,by selecting 288 simply-supported beams with different load ratios,thicknesses of concrete cover,span-depth ratios and reinforcement ratios for the high-temperature response analysis.Based on the simulation results,simplified ways to quantificationally determine the fire resistance of simply-supported NSC and HSC beams are presented.The results show that the explosive spalling at a high temperature significantly influences the fire resistance of simply-supported HSC beams,and that the fire resistance of both HSC beams and NSC beams can be effectively improved by strictly controlling the load ratio and properly increasing the thickness of concrete cover. |
| |
| Keywords: | normal-strength concrete high-strength concrete simply-supported beam high temperature fire resistance explosive spalling |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
