四面受火木柱耐火极限的试验研究  

Experimental research on fire endurance of timber columns exposed to four-side fire

作　　者：李向民[1,2] 李帅希[3] 许清风[1,2] 徐强[2] 张晋[3] 穆保岗[3] 

机构地区：[1]上海市工程结构新技术重点实验室,上海200032 [2]上海市建筑科学研究院,上海200032 [3]东南大学,南京210096

出　　处：《建筑结构》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)

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.

关 键 词：木柱 四面受火 石灰膏抹面 耐火极限 

分 类 号：TU391[建筑科学—结构工程]