摘要
为研究我国常用树种胶合木钢夹板螺栓连接节点的抗火性能,进行了4个胶合木钢夹板螺栓连接试件的炭化速度试验,以及两组(共8个)胶合木钢夹板螺栓连接试件在不同持荷水平下的耐火极限试验.结果表明:钢夹板边缘内侧区域木材的炭化速度小于钢夹板边缘外侧区域,不同截面的水平向炭化速度小于竖向炭化速度,炭化速度随着受火时间的延长有降低的趋势;试件端距达到规范要求后,将端距从7d增加到10d并不能明显提高耐火极限,耐火极限随着持荷水平的增加而明显降低;其他条件相同时,耐火极限试件升温快于炭化速度试件.
In order to reveal the fire resistance of bolted steel-glulam-steel connections using common tree species in China as the material,four connection specimens were tested to obtain the corresponding charring rates,and two groups of（ eight） specimens were tested to reveal their fire endurance in different load levels. It is found that（ 1）the charring rate of interior area at steel splint edge is lower than that of external area;（ 2） the horizontal charring rate is lower than the vertical one in different cross sections;（ 3） the charring rate tends to reduce with the prolonging of fire duration;（ 4） changing the end-to-end distance from 7d to 10 d cannot remarkably improve the fire endurance limit of the bolted connections when the distance meets the regulatory requirements;（ 5） the fire endurance limit of the connections significantly decreases with the increase of load level; and（ 6） in the same conditions,the temperature rise of specimens in fire endurance tests is higher than that in charring rate tests.
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2015年第2期58-65,共8页
Journal of South China University of Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(51178115)
江苏省自然科学基金资助项目(BK2012239)~~
关键词
胶合木钢夹板螺栓连接
炭化速度
耐火极限
抗火性能
bolted steel-glulam-steel connection
charring rate
fire endurance limit
fire resistance
