Investigation into Permissible Tensional Prestress of Prestressed Carbon Fiber-Reinforced Polymer

Journal of South China University of Technology (Natural Science Edition) ›› 2009, Vol. 37 ›› Issue (6): 96-100.

• Mechanics • Previous Articles Next Articles

Investigation into Permissible Tensional Prestress of Prestressed Carbon Fiber-Reinforced Polymer

Guo Xin-yan Huang Pei-yan Zheng Xiao-hong

School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, Guangdong, China

Received:2008-07-24 Revised:2008-11-11 Online:2009-06-25 Published:2009-06-25
Contact: 郭馨艳（1971-），女，讲师，博士，主要从事疲劳与断裂力学研究． E-mail:xyguo@scut．edu．cn
About author:郭馨艳（1971-），女，讲师，博士，主要从事疲劳与断裂力学研究．
Supported by:
国家自然科学基金资助项目（10672060）;广东省自然科学基金资助项目（07006538）

Abstract

Abstract:

Bonding prestressed carbon fiber-reinforced polymer （carbon FRP, CFRP） plates to reinforced concrete （RC） beams can improve the working efficiency and force conditions of structures. However, larger tension prestress is not always better. In this paper, the permissible tensional prestress of the RC beams strengthened with pre- stressed CFRP is discussed in terms of the tensile strength of concrete, the shear strength of interface between concrete and CFRP, and the tensile strength of CFRP. Moreover, the permissible tensional prestresses in the concrete tensile-cracking, interface debonding and CFRP fracture before steel bar are respectively calculated. It is found that the permissible tensional prestress in interface debonding is the lowest.

Key words: reinforced concrete beam, strengthening, prestressed carbon fiber-reinforced polymer, permissible tensional prestress

Guo Xin-yan Huang Pei-yan Zheng Xiao-hong . Investigation into Permissible Tensional Prestress of Prestressed Carbon Fiber-Reinforced Polymer[J]. Journal of South China University of Technology (Natural Science Edition), 2009, 37(6): 96-100.

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Investigation into Permissible Tensional Prestress of Prestressed Carbon Fiber-Reinforced Polymer

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