摘要
A method for strengthening concrete structures by prestressed intraply hybrid C/AFRP sheets(composed of aramid fiber and carbon fiber)is proposed,aiming at overcoming shortages of some current strengthening methods.The bending capacity of beams strengthened by prestressed intraply hybrid C/AFRP sheets is analysed.The result shows that the bending resistance,the extending performance and the economical efficiency of intraply hybrid fiber sheets are better than those of interlaminar hybrid fiber sheets and single-fiber sheets.Moreover,prestressed intraply hybrid C/AFRP sheets can improve the performance of the strengthened beam,effectively inhibit the expansion of the cracks,and reduce distortion and risk of early failure.
A method for strengthening concrete structures by prestressed intraply hybrid C/AFRP sheets（composed of aramid fiber and carbon fiber） is proposed, aiming at overcoming shortages of some current strengthening methods. The bending capacity of beams strengthened by prestressed intraply hybrid C/AFRP sheets is analysed. The result shows that the bending resistance, the extending performance and the economical efficiency of intraply hybrid fiber sheets are better than those of interlaminar hybrid fiber sheets and single-fiber sheets. More- over, prestressed intraply hybrid C/AFRP sheets can improve the performance of the strengthened beam, effectively inhibit the expansion of the cracks, and reduce distortion and risk of early failure.
基金
Supported by the National Natural Science Foundation of China(11272147,10772078)
the Priority Academic Porgram Development of Jiangsu Higher Education Institutions
the Jiangsu Transportation Research Program Funded Projects(2012Y10)
the Suqian Transportation Research Project(SQJTKY2012-09)
the Open Foundation of State Key Laboratory of Mechanics and Control Mechanical Structures in Nanjing University of Aeronautics and Astronautics(XQA13007)
