EXPERIMENT AND THEORETICAL RESEARCH ON FLEXURAL PERFORMANCE OF RC BEAMS STRENGTHENED WITH PRESTRESSED AFRP SHEETS

Deng Zongcai; Li Jianhui

doi:10.13204/j.gyjz200710027

Volume 37 Issue 10

Dec. 2014

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Deng Zongcai, Li Jianhui. EXPERIMENT AND THEORETICAL RESEARCH ON FLEXURAL PERFORMANCE OF RC BEAMS STRENGTHENED WITH PRESTRESSED AFRP SHEETS[J]. INDUSTRIAL CONSTRUCTION, 2007, 37(10): 101-105,111. doi: 10.13204/j.gyjz200710027

Citation:

Deng Zongcai, Li Jianhui. EXPERIMENT AND THEORETICAL RESEARCH ON FLEXURAL PERFORMANCE OF RC BEAMS STRENGTHENED WITH PRESTRESSED AFRP SHEETS[J]. INDUSTRIAL CONSTRUCTION, 2007, 37(10): 101-105,111. doi: 10.13204/j.gyjz200710027

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EXPERIMENT AND THEORETICAL RESEARCH ON FLEXURAL PERFORMANCE OF RC BEAMS STRENGTHENED WITH PRESTRESSED AFRP SHEETS

doi: 10.13204/j.gyjz200710027

1.
School of Civil Engineering,Beijing University of Technology Beijing 100022

Received Date: 2006-11-13
Publish Date: 2007-10-20

Abstract

Abstract

Prestress technology is an effective way to use the high strength of FRP composite. The experimental study onflexural performance of strengthening RC beams using prestressed aramid fiber reinforced plastic (AFRP) sheets isconducted, and the effects of different prestress level on the propertiesof flexural load, stiffness and ductility are analyzed.Results show that, when prestress level is 55%～ 65%, the cracking load, yield load and ultimate load of RC beamsstrengthened with prestressed AFRP sheets are 147%～ 165%, 28%～ 50%, 13%～ 31% larger than that of RC beamsstrengthened with non -prestressed AFRP sheets, validating the effectiveness of prestressed AFRP sheet retrofit.The failurepattern of prestressed AFRP sheets is fracture, but that of non-prestressed AFRP sheets is debonding.Based on theexperimental study, an elastoplastic section analysis method is conducted to predict the loads of beams, the results from thetheoretical predictions and the experiment agree well.
- AFRP sheets,
- prestressed,
- mechanical properties,
- concrete

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References(7)

References

.Triantafillou Thanasis C, Deskovic Nikola. Innovative Prestressing withFRP Sheets: Mechanics of Short-Term Behaviors. Journal of EngineeringMechanics, 1991, 117(7): 1 652-1 672

.Raafat EI -Hacha, RGordon Wight, Mark F Green. Innovative System forPrestressing Fiber -Reinforced Polymer Sheets. ACI Structural Journal,2003, 100 (3): 305-313

.张建伟, 邓宗才, 杜修力, 等. 芳纶纤维布加固钢筋混凝土梁的抗弯性能. 特种结构, 2005, 22(4): 90-92

.张建伟, 杜修力, 邓宗才, 等. 预应力芳纶纤维布加固混凝土梁的受弯性能研究. 建筑结构学报, 2006,27(5 ): 101-109

.王文炜, 盛波, 李果. 玻璃纤维布加固的钢筋混凝土梁延性分析. 东南大学学报, 2005, 35(4): 569-573

.邓宗才. 碳纤维布增强钢筋混凝土梁抗弯力学性能研究. 中国公路学报, 2001, 14(2): 45-51

.GB 50010 -2002 混凝土结构设计规范

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