摘要
树木在生长过程中吸收二氧化碳,排出氧气;同时木材又是可再生和循环再利用的建筑材料,因此越来越多的木结构被应用于现代居住和公共建筑物中。为了更好地了解重型木结构抗火性能及其抗火设计方法,在已有研究成果和文献的基础上,详细地介绍了火灾下木材的温度、力学和炭化特性,并介绍了国外关于木材炭化率的计算公式;根据炭化率计算公式及其火灾下木材力学性能介绍了火灾下受拉和受弯重型木构件承载力的计算。最后介绍的重型木结构抗火设计方法,可供实际重型木结构工程抗火设计参考。
Trees can absorb carbon dioxide and emit oxygen in the its growth process,wood also is a renewable and recycled building materials simultaneously,so more and more timber structures are used in modern residential and public buildings.To understand better the fire resistant performance and fire resistant design methods of the heavy timber structures,the temperature,mechanical and charring properties of wood were introduced in detail;the calculation methods on charring rate and load-carrying capacity of the tension and bending timber components exposed on fire also were introduced on the basis of the existed research.Fire resistant design method of heavy timber structures was also introduced finally,which can be used as references for fire-resistance design of timber structures.
出处
《结构工程师》
2010年第6期16-20,共5页
Structural Engineers
基金
国家科技支撑计划(2006BAJ03A07-04)
关键词
木结构
抗火性能
炭化率
承载力
timber structure
fire resistance performance
charring rate
load-carrying capacity
