湖南大学学报（自然科学版）Issue(1)：117-123,7.
木结构榫卯节点耐火极限试验研究
Experiment Study on Fire Endurance of Mortise-tenon Joint in Timber Structures
摘要
Abstract
To learn the fire resistance performance of wood mortise-tenon joints of commonly used wooden species in China,4 framed mortise-tenon joints commonly used in ancient wooden structures were exposed to fire,and 1 contrast specimen of bearing capacity test was experimentally studied.It is found that,in the capacity test,the vertical displacement of the contrast specimen in the middle of the beam changes linearly with the load.Meanwhile,there is no obvious yield point and the specimen has poor duc-tility.The value of the constant load of 4 specimen applied in the fire endurance test was identified accord-ing to the bearing capacity of the reference specimen and the different load ratio.The fire endurance of specimen with a load ratio of 25%,37.5% and 50% was 59,44,21 minutes respectively,and the fire en-durance of the specimen with fire proof coating and a load ratio of 50% was 58 minutes,which indicates that the decrease of load ratio and the fire proof coating can both effectively increase the fire endurance of mortise-tenon connection.Temperature data have shown that the load ratio has little impact on the rate of temperature rise,and the small gaps of 2~4 mm between the tenon and the mortise has little impact on the heat transfer of wood.关键词
榫卯节点/耐火极限/截面温度/持荷水平/破坏形态Key words
mortise-tenon joint/fire endurance/section temperature/load level/failure mode分类
建筑与水利引用本文复制引用
张晋,王斌,宗钟凌,侯士通,柏益伟..木结构榫卯节点耐火极限试验研究[J].湖南大学学报（自然科学版）,2016,(1):117-123,7.基金项目
国家自然科学基金资助项目（51178115），National Natural Science Foundation of China（51178115）；江苏省自然科学基金资助项目 （）
