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[1] Shi Qiyin, Li Aiqun, Hui Zhuo,. Fatigue behavior of crane beam strengthened with CFRP [J]. Journal of Southeast University (English Edition), 2007, 23 (4): 561-565. [doi:10.3969/j.issn.1003-7985.2007.04.017]
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Fatigue behavior of crane beam strengthened with CFRP()
碳纤维布加固钢筋砼吊车梁抗弯疲劳性能试验
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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:
23
Issue:
2007 4
Page:
561-565
Research Field:
Civil Engineering
Publishing date:
2007-12-30

Info

Title:
Fatigue behavior of crane beam strengthened with CFRP
碳纤维布加固钢筋砼吊车梁抗弯疲劳性能试验
Author(s):
Shi Qiyin1;  Li Aiqun2;  Hui Zhuo2
1Department of Civil Engineering, Jiangsu University, Zhenjiang 212013, China
2Key Laboratory of Concrete and Prestressed Concrete Structure of Ministry of Education, Southeast University, Nanjing 210096, China
石启印1;  李爱群2;  惠卓2
1江苏大学土木工程系, 镇江 212013; 2东南大学混凝土及预应力混凝土结构教育部重点实验室, 南京 210096
Keywords:
RC crane beam;  structure strengthening;  fatigue test;  carbon fiber reinforced polymer(CFRP)
钢筋混凝土吊车梁;  结构加固;  疲劳试验;  碳纤维布
PACS:
TU375.1
DOI:
10.3969/j.issn.1003-7985.2007.04.017
Abstract:
In order to study the fatigue behavior of the damaged reinforced concrete(RC)beams strengthened by carbon fiber reinforced polymer(CFRP)laminate, three T-shaped beams strengthened by CFRP and one contrasting beam are tested under fatigue loading, with the parameters of different modes of strengthening and different fatigue load levels considered.The main results obtained from the tests are:the width of the crack decreases 50.2% to 66%, and the development of the crack is limited;the stress of steel decreases 24.1% to 28.2%, and the stiffness increases 14.9% to 16.1% after being strengthened.Based on the technical specification for strengthening concrete structures with CFRP and the conclusions from the tests, a calculating scheme of the flexure stiffness is given, which can be used for reference in engineering design.Finally, some suggestions are given for design in fatigue strengthening.
为研究碳纤维布(CFRP)对加固后钢筋混凝土梁的抗弯疲劳性能的影响, 进行了3根CFRP加固梁及1根对比梁的抗弯疲劳试验.研究了碳纤维布加固方式、构件使用荷载等参数对碳纤维布加固损伤钢筋混凝土吊车梁的抗弯疲劳性能影响.试验研究表明:采用碳纤维布加固后, 构件裂缝的宽度减小50.2%~66%, 发展速度也得到控制, 钢筋应力减小24.1%~28.2%, 构件的刚度提高14.9%~16.1%.依据试验结果, 从现有规范中关于构件刚度计算方法出发, 进行了CFRP加固钢筋混凝土吊车梁的疲劳刚度计算分析, 该计算方法可用于吊车梁加固工程设计.最后给出了CFRP加固梁的疲劳设计的合理化建议.

References:

[1] Wang Fengquan, Yang Yongzin, Yue Qingrui.FRP composite material and its application to civil engineering [J].Journal of Huaqiao University:Natural Science, 2005, 26(1):1-6.(in Chinese)
[2] CECS146 Technical specification for strengthening concrete structures with carbon fiber reinforced polymer laminate[S].Beijing:China Planning Press, 2003.(in Chinese)
[3] Dong Yongtao.Static and fatigue performance of reinforced concrete beams retrofitted with external CFRP composites [D].University of Illinois at Chicago, 2003.
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Memo

Memo:
Biography: Shi Qiyin(1964—), male, doctor, professor, shiqiyin@ujs.edu.cn.
Last Update: 2007-12-20