摘要
作为一种常用的建筑材料,钢材虽然具备强度高、延性好、装配式施工方便等一系列的优点,但其防火性能较差。钢结构在高温下会丧失承载能力,导致结构的破坏、局部或整体垮塌。为保证钢结构建筑的火灾安全,为人员疏散、消防灭火救援、财产转移等创造充分的时间条件,建筑钢结构构件应具有一定的耐火极限。随着《建筑钢结构防火技术规范》(GB 51249-2017)、《钢结构防火涂料》(GB 14907-2018)等新规范的发布与施行以及相关协会或团体标准的修订,钢结构防火设计方法发生了重大变化,由经验设计方法转变为基于结构构件耐火极限验算的量化设计方法。对国内现行钢结构防火设计相关的规范体系进行了梳理,并介绍了典型钢结构防火设计方法和流程。
As a commonly used building material, although steel has a series of advantages such as high strength, good ductility, and convenient assembly-type construction, its fire safety performance is poor. Steel structure loses its bearing capacity at high temperature, leading to structural damage, partial or overall collapse. In order to ensure the fire safety of steel structure buildings and create sufficient time conditions for personnel evacuation, firefighting and rescue, property transfer, etc., building steel structure components should have a certain fire resistance. With the release and implementation of new codes such as Code for fire safety of steel structures in buildings(GB 51249-2017) and Fire resistive coating for steel structure(GB 14907-2018) and the revision of relevant association or group standards, significant changes have taken place in the fire safety design method of steel structures, and the empirical design method is transformed to a quantitative design method based on the check calculation of the fire safety limit of structural components. The current domestic standard systems related to fire safety design of steel structures were sorted out and typical steel structure fire safety design methods and procedures were introduced.
作者
宋谦益
SONG Qianyi(China Southwest Architectural Design and Research Institute Co.,Ltd.,Chengdu 610042,China)
出处
《建筑结构》
CSCD
北大核心
2020年第24期1-10,共10页
Building Structure
基金
中国博士后科学基金项目(2017M620869,2018T110128)
国家重点研发计划课题(2019YFD1101001)
四川省科技计划项目(2019YFS0064)。
关键词
钢结构
防火设计
规范体系
防火涂料
耐火极限
steel structure
fire safety design
code system
fire resistive coating
fire resistance
