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| 表面设置防火涂料高强混凝土柱的耐火极限 | |
| 引用本文： | 张晓磊,沈梦雨,陈宝生.表面设置防火涂料高强混凝土柱的耐火极限[J].防灾减灾工程学报,2012,32(1):27-30. |
| 作者姓名： | 张晓磊 沈梦雨 陈宝生 |
| 作者单位： | 1. 华南理工大学亚热带建筑科学国家重点实验室,广州510640;江西省电力设计院,南昌330096 2. 华南理工大学亚热带建筑科学国家重点实验室,广州,510640 3. 西安建筑科技大学土木工程学院,西安,710055 |
| 基金项目： | 国家杰出青年科学基金，国家科技支撑计划子课题，陕西省百人计划项目 |
| 摘 要： | 前期试验表明,表面设置厚度20 mm的某非膨胀型防火涂料可较好地抑制高强混凝土的高温爆裂.本文通过试验反算给出了该涂料对应不同温度区间的平均导温系数；随后,利用结构抗火分析软件SAFIR对表面设置该涂料的高强混凝土柱的耐火极限进行了计算分析,考察了截面尺寸、轴压比、荷载偏心率及配筋率等因素的影响,在此基础上提出了相应的... |
| 关 键 词： | 高强混凝土柱 防火涂料 耐火极限 |
Misoperation cause analysis of zero sequenceI section direction overcurrent protection device in transmission line |
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| Zhang Xiaolei,SHEN Mengyu,Chen Baosheng.Misoperation cause analysis of zero sequenceI section direction overcurrent protection device in transmission line[J].Journal of Disaster Prevent and Mitigation Eng,2012,32(1):27-30. | |
| Authors: | Zhang Xiaolei SHEN Mengyu Chen Baosheng |
| Affiliation: | 1.State Key Laboratory of Subtropical Building Science,South China University of Technology, Guangzhou 510640,China; 2.Jiangxi Electric Power Design Institution,Nanchang 330096,China; 3.School of Civil Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China) |
| Abstract: | It is shown that a special fire insulation with a thickness of 20 mm is effective against explosive spalling of high strength concrete(HSC) at high temperature.Based on test results,mean thermal conductivity coefficients of the fire insulation are determined in different thermal ranges.Then,fire resistance performance of HSC columns with the fire insulation is analyzed by using the computer program SAFIR, and the influences of axial load ratio,cross - sectional dimensions,load eccentricity ratio and reinforcement ratio are discussed.Finally,a regressive formula is proposed for calculation of fire resistance rating of HSC columns with the fire insulation.Simulation results show that:(a) the thermal conductivity coefficient of the fire insulation decreases slightly with increase of temperature;and(b) the fire resistance of HSC columns with 20 mm thick fire insulation can be 40%～350%larger than those without the fire insulation. |
| Keywords: | high strength concrete column fire insulation fire resistance rating |
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