Journal of South China University of Technology (Natural Science Edition) ›› 2007, Vol. 35 ›› Issue (7): 1-5.

• Mechanics •     Next Articles

Analysis of Interfacial Stresses for RC Beams Strengthened with Prestressed FRP

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

  1. School of Traffic and Cornrnunications , South China Univ. of Tech. , Guangzhou 510640 , Guangdong , China
  • Received:2006-04-05 Online:2007-07-25 Published:2007-07-25
  • Contact: 郭馨艳(1971-)，女，博士，主要从事桥梁力学、FRP 加固技术的研究. E-mail:xinyanguo@163. com
  • About author:郭馨艳(1971-)，女，博士，主要从事桥梁力学、FRP 加固技术的研究.
  • Supported by:

    国家自然科学基金资助项目( 10272047 ,10672060) ;中国博士后科学基金资助项目(20060400757) ;华南理工大学博士后创新基金资助项目

PDF

760

Abstract:

Bonding prestressed fiber-reinforced polymer (FRP) plate to strengthen and repair civil engineering structures improves the working efficiency and the force conditions of structures. In this paper , formulae of the shears and normal stresses on the interfacial layer between the prestressed FRPs and the concrete members of strengthened reinforced concrete (RC) beams were deduced based on theoretical analyses , and the distributions of the interfacial stresses were analyzed. Then , by means of finite element method (FEM) , numerical experimer山were carried out to reveal the effects of initial prestress and CFL thickness on the interfacial stresses. It is shown from theoretical analyses and FEM results that there may arise the debonding of CFL from the concrete members when the initial prestress is 20% of the tensile strength and is loaded on the CFL without anchorage at the two ends.

Key words: fiber-reinforced polymer, prestress, interfacial stress, reinforced concrete beam