摘要
通过6根四面受火木柱耐火极限的对比试验,研究不同持荷水平、是否采用石灰膏抹面对木柱耐火极限的影响。研究结果表明,四面受火木柱耐火极限随着荷载水平的增加而明显降低。采用石灰膏抹面后,其耐火极限有所增加。石灰膏抹面能有效降低四面受火木柱内的温升梯度,延缓木柱开始炭化的时间,降低炭化速度。
To learn the effective factors such as load level and lime putty finishing,six timber columns were tested.It was found that the fire endurance of timber column exposed to four-side fire obvious decreases when the load level increases.The fire endurance will extend after lime putty finishing is used.The lime putty finishing will obviously drop the increase gradient of temperature inside the timber column,effectively delay the beginning time of charring and reduce the charring rate.
出处
《建筑结构》
CSCD
北大核心
2010年第3期115-117,共3页
Building Structure
基金
上海市科委青年科技启明星计划(07QB14031)
国家科技支撑计划(2006BAJ03A10-02)
关键词
木柱
四面受火
石灰膏抹面
耐火极限
timber column
exposed to four-side fire
lime putty finishing
fire endurance
