华南理工大学学报(自然科学版) ›› 2015, Vol. 43 ›› Issue (2): 58-65.doi: 10.3969/j.issn.1000-565X.2015.02.009

• 土木建筑工程 • 上一篇    下一篇

胶合木钢夹板螺栓连接节点的抗火性能

张晋1 许清风2 柏益伟1 蔡建国1   

  1. 1. 东南大学 混凝土及预应力混凝土结构教育部重点实验室,江苏 南京 210096;2. 上海市建筑科学研究院 上海市工程结构安全重点实验室,上海 200032
  • 收稿日期:2014-06-06 修回日期:2014-09-10 出版日期:2015-02-25 发布日期:2014-12-31
  • 通信作者: 张晋(1974-),男,博士,副教授,主要从事木结构体系、预应力结构体系研究. E-mail:zhangjin0622@139.com
  • 作者简介:张晋(1974-),男,博士,副教授,主要从事木结构体系、预应力结构体系研究.
  • 基金资助:

    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)

Fire Resistance of Bolted Steel-Glulam-Steel Connections

Zhang Jin1 Xu Qing-feng2 Bai Yi-wei1 Cai Jian-guo1   

  1. 1. Key Laboratory of Concrete & Prestressed Concrete Structures of the Ministry of Education,Southeast University,Nanjing 210096,Jiangsu,China; 2. Shanghai Key Laboratory of Engineering Structure Safety,Shanghai Research Institute of Building Sciences,Shanghai 200032,China
  • Received:2014-06-06 Revised:2014-09-10 Online:2015-02-25 Published:2014-12-31
  • Contact: 张晋(1974-),男,博士,副教授,主要从事木结构体系、预应力结构体系研究. E-mail:zhangjin0622@139.com
  • About author:张晋(1974-),男,博士,副教授,主要从事木结构体系、预应力结构体系研究.
  • Supported by:
    Supported by the National Natural Science Foundation of China(51178115)and the Natural Science Foundtion of Jiangsu Province(BK2012239)

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.

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

Abstract: 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 prolon-ging of fire duration; (4) changing the end-to-end distance from 7d to 10d cannot remarkably improve the fire en-durance 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.

Key words: bolted steel-glulam-steel connection, charring rate, fire endurance limit, fire resistance

中图分类号: