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[1]罗立权,杨会峰,刘伟庆,等.火灾高温下木结构植筋连接的拉拔性能试验[J].南京工业大学学报(自然科学版),2020,42(01):115-123.[doi:10.3969/j.issn.1671-7627.2020.01.017]
 LUO Liquan,YANG Huifeng,LIU Weiqing,et al.Pull-out experiments of glued-in rod joints in timber structures under high temperatures in fire[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2020,42(01):115-123.[doi:10.3969/j.issn.1671-7627.2020.01.017]
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火灾高温下木结构植筋连接的拉拔性能试验()
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《南京工业大学学报(自然科学版)》[ISSN:1671-7627/CN:32-1670/N]

卷:
42
期数:
2020年01期
页码:
115-123
栏目:
出版日期:
2020-01-13

文章信息/Info

Title:
Pull-out experiments of glued-in rod joints in timber structures under high temperatures in fire
文章编号:
1671-7627(2020)01-0115-09
作者:
罗立权12杨会峰1刘伟庆1许清风34
1.南京工业大学 土木工程学院,江苏 南京 211800; 2.新疆农业大学 水利与土木工程学院,新疆 乌鲁木齐 830052; 3.上海市工程结构新技术重点实验室,上海 200032; 4. 上海市建筑科学研究院,上海 200032
Author(s):
LUO Liquan12YANG Huifeng1LIU Weiqing1XU Qingfeng34
1. College of Civil Engineering, Nanjing Tech University, Nanjing 211800, China; 2. College of Hydraulic and Civil Engineering, Xinjiang Agricultural University, Urumuqi 830052, China; 3. Shanghai Key Laboratory of New Technology Research on Engineering S
关键词:
木结构 植筋连接 耐高温性能 改性环氧胶 抗拔承载力
Keywords:
timber structure glued-in rod joints heat resistance modified epoxy adhesive pull-out strength
分类号:
TU366.3,TU398+.6
DOI:
10.3969/j.issn.1671-7627.2020.01.017
文献标志码:
A
摘要:
为了研究木结构植筋连接在火灾高温下的受力性能,本文对10组44个胶合木植筋试件分别开展了室温和高温下的拉拔试验研究,深入分析了胶黏剂种类和植筋杆-胶层界面温度对植筋承载力的影响,研究了试验现象、植筋承载力和滑移性能。试验结果表明:在室温下,传统环氧植筋胶与改性环氧植筋胶的受力性能相差不大; 随着植筋杆-胶层界面温度的升高,改性环氧植筋胶的优势越发明显,对于传统环氧植筋胶试件,当植筋杆-胶层界面温度在50 ℃时拉拔承载力下降了约50%,植筋杆-胶层界面温度超过80 ℃时拉拔承载力只有室温时的15.4%,而对于本文提出的改性环氧植筋胶,当植筋试件的植筋杆-胶层界面温度在100 ℃以内时,仍能保持室温极限荷载50%的承载力; 在室温时改性环氧植筋胶植筋节点的初始刚度略大,但在高温下改性环氧植筋胶植筋连接的初始刚度显著提高; 此外,改性环氧植筋胶试件相对于传统环氧植筋胶试件,其在高温情形下的植筋杆滑移也显著减小。
Abstract:
To investigate the load carrying capacity of glued-in rod joints under high temperatures in fire, the pull-out tests of 44 specimens in 10 groups were carried out at room temperature and high temperatures respectively. The effects of adhesive type and interfacial temperature between the bar and the glue-line on the load carrying capacity of the joints were discussed. The test phenomenon, load carrying capacity and slip behavior of the joints were considered. Results showed that the load carrying capacity of traditional epoxy adhesive and modified epoxy adhesive were similar at room temperature, but with the increase of the interfacial temperature, the advantage of modified epoxy became more obvious. For traditional epoxy adhesive specimens, when the interfacial temperature was 50 ℃, the load carrying capacity decreased by more than 50%, while the interfacial temperature reached 80 ℃, and the load carrying capacity was only 15.4% of that at room temperature. As a comparison for modified epoxy adhesive specimens, when the interfacial temperature was within 100 ℃, it was still remained 50% of the ultimate load as at room temperature. Moreover, when compared to the joints with traditional epoxy adhesive, the initial stiffness of the glued-in rod joints with modified epoxy resin was significantly increased at high temperatures, and the slip value of the modified epoxy resin specimens was also obviously reduced.

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相似文献/References:

[1]徐德良,刘伟庆,杨会峰,等.木材钢填板螺栓连接的承载能力试验研究[J].南京工业大学学报(自然科学版),2009,31(01):87.
 XU De-liang,LIU Wei-qing,YANG Hui-feng,et al.Experimental study on bearing capacity of bolted wood-steel-wood connections in timber structures[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2009,31(01):87.

备注/Memo

备注/Memo:
收稿日期:2019-06-26
基金项目:国家自然科学基金(51578284); 上海市工程结构安全重点实验室开放课题(2017-KF09)
作者简介:罗立权(1975—),男,E-mail:495759460@qq.com; 刘伟庆(联系人),教授,E-mail:wqliu@njtech.edu.cn.
引用格式:罗立权,杨会峰,刘伟庆,等.火灾高温下木结构植筋连接的拉拔性能试验[J].南京工业大学学报(自然科学版),2020,42(1):115-123.
LUO Liquan, YANG Huifeng, LIU Weiqing, et al. Pull-out experiments of glued-in rod joints in timber structures under high temperatures in fire[J].Journal of Nanjing Tech University(Natural Science Edition),2020,42(1):115-123..
更新日期/Last Update: 2020-01-30