|本期目录/Table of Contents|

[1]周长东,吕西林,金叶,等.火灾高温下玻璃纤维筋的力学性能研究[J].建筑科学与工程学报,2006,23(01):23-28.
 ZHOU Chang-dong,LU Xi-lin,JIN Ye.Research on Mechanical Behavior of GFRP Bars in High Temperature[J].Journal of Architecture and Civil Engineering,2006,23(01):23-28.
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火灾高温下玻璃纤维筋的力学性能研究(PDF)
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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:
23卷
期数:
2006年01期
页码:
23-28
栏目:
出版日期:
2006-03-20

文章信息/Info

Title:
Research on Mechanical Behavior of GFRP Bars in High Temperature
作者:
周长东;吕西林;金叶;
同济大学 土木工程防灾国家重点实验室,上海 200092
Author(s):
ZHOU Chang-dong LU Xi-lin JIN Ye
State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China
关键词:
粘结强度 玻璃纤维筋 火灾 高温 力学性能
Keywords:
bond strength GFRP bar fire high temperature mechanical behavior
分类号:
TU541
DOI:
-
文献标志码:
A
摘要:
针对土木工程中所用的纤维筋耐火能力问题,对27组,共100根玻璃纤维(GFRP)筋试件在火灾高温时的力学性能进行了试验研究,试验中主要考虑了温度和受火时间的影响,得到了火灾高温中和火灾高温后玻璃纤维筋的抗拉强度和弹性模量。试验结果证明:玻璃纤维筋的力学性质表现出明显的阶段性,110 °C时粘结胶体逐渐软化而丧失粘结能力,但温度下降后其粘结强度还可以恢复; 190 °C时粘结胶体已基本碳化,其粘结性能将不能再恢复。因为受到火灾高温的影响,玻璃纤维筋的强度和弹性模量均会下降,若所经历的最高温度低于190 °C,其力学性能还可恢复; 若高于190 °C,将不能再恢复。这些试验结果可以用于玻璃纤维筋增强混凝土结构抗火设计中。
Abstract:
The fire-resistance behavior of FRP bars is lower than that of steel reinforcement. Experimental studies were carried out on 100(27 groups)GFRP bars exposed to high temperature under axial load to investigate the mechanical behavior of GFRP bars under fire and after fire. The parameters considered are temperature variation and the time exposed to high temperature. The tensile strength and the elastic modulus of GFRP bars were investigated through test. The test results were obtained during and after high temperature exposure and indicate that the mechanical behavior of GFRP bars has obvious phasic changes: the resin will soften when temperature is higher than 110 °C. At this point, the resin will no longer be able to transfer stresses from fiber to fiber, but the bond strength of resin will be recovered when temperature decreased. The resin will be carbonized when temperature is higher than 190 °C. At this point, the bond strength of resin will not be recovered. When the strength and the elastic modulus of GFRP bars decrease with the rise of temperature, it can be recovered when the highest temperature experienced is under 190 °C. The results can be applied to fire resistance design of GFRP reinforced concrete structures.

参考文献/References:

[1] 吕志涛.高性能材料FRP应用与结构工程创新[J].建筑科学与工程学报,2005,22(1):1-5. LU Zhi-tao.Application of High Performance FRP and Innovations of Structure Engineering[J].Journal of Architecture and Civil Engineering,2005,22(1):1-5.
[2]楼梦麟,白建方.FRP加固梁模态分析的摄动解法[J].建筑科学与工程学报,2005,22(2):21-24. LOU Meng-lin,BAI Jian-fang.Perturbation Solution for Modal Characteristics of Beam Strengthened By FRP[J].Journal of Architecture and Civil Engineering,2005,22(2):21-24.
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[5]贺拴海,任 伟.纤维增强塑料加固混凝土结构研究[J].建筑科学与工程学报,2005,22(3):20-24. HE Shuan-hai,REN Wei.Research on Rreinforced Concrete Structure with FRP[J].Journal of Architecture and Civil Engineering,2005,22(3):20-24.
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[7]PISANI M A.A Numerical Survey on the Behaviour of Beams Pre-stressed With FRP Cables[J].Construction and Building Materials,1998,12(4):221-232.

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备注/Memo

备注/Memo:
收稿日期:2005-12-11
基金项目:国家自然科学基金项目(50321803); 中国博士后科学基金项目(20040350492); 上海市博士后科研计划项目(200412)
作者简介:周长东(1971-),男,山东聊城人,讲师,工学博士,博士后,E-mail:goldenleaf12@hotmail.com。
更新日期/Last Update: 2006-03-20