预应力FRP加固RC梁的受力分析

华南理工大学学报（自然科学版） ›› 2005, Vol. 33 ›› Issue (7): 6-10.

预应力FRP加固RC梁的受力分析

郭馨艳黄培彦郑小红

华南理工大学交通学院，广东广州 510640

收稿日期:2004-10-20 出版日期:2005-07-25 发布日期:2005-07-25
通信作者: 郭馨艳(1971-)，女，讲师，博士生，主要从事疲劳与断裂力学的研究 E-mail:xinyanguo@163.com
作者简介:郭馨艳(1971-)，女，讲师，博士生，主要从事疲劳与断裂力学的研究
基金资助:
国家自然科学基金资助项目(10272047)；广东省自然科学基金资助项目(020856)

M echanical Analysis of RC Beams Strengthened by Prestressed FRPs

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

College of Traffic and Communications,South China Univ.of Tech.,Guangzhou 5 10640,Guangdong,China

Received:2004-10-20 Online:2005-07-25 Published:2005-07-25
Contact: 郭馨艳(1971-)，女，讲师，博士生，主要从事疲劳与断裂力学的研究 E-mail:xinyanguo@163.com
About author:郭馨艳(1971-)，女，讲师，博士生，主要从事疲劳与断裂力学的研究
Supported by:
国家自然科学基金资助项目(10272047)；广东省自然科学基金资助项目(020856)

摘要/Abstract

摘要： 粘贴预应力纤维增强复合材料(FRP)片材对土木建筑结构进行加固和修复，可以提高工程效率，改善构件的受力状况．文中从理论分析着手，推导出了预应力FRP片材增强RC梁的有效预应力、预应力损失量和容许张拉预应力的计算公式，并以两组预应力FRP片材增强RC试验梁为研究对象，从理论上计算了这些试验梁的有效预应力、预应力损失量和容许张拉预应力．分析结果表明，有效预应力的理论计算值与实验值相吻合，但预应力损失量的实验值比理论计算值稍大．

关键词: 纤维增强片材, 有效预应力, 预应力损失量, 容许张拉预应力

Abstract:

Bonding prestressed FRPs(Fiber-Reinforced Plates)to strengthen and repair civil engineering structures improves the working eficiency and the force conditions of structures.In this paper,formulae of the virtual pre-stress,the prestress lose and the perm issible prestress on the RC beam strengthened by prestressed FRPs are de-duced based on theoretical analyses.Moreover,the virtual prestress,prestress lose and perm issible prestress of two kinds of prestressed FRP-strengthened RC beams are calculated.The results show that the calculated values of vir-tual prestress are consistent with the experimental results,while the calculated values of prestress lose are slightly less than the experimental results.

Key words: fiber·reinforced plate, virtual prestress, prestress lose, perm issible prestress

郭馨艳黄培彦郑小红. 预应力FRP加固RC梁的受力分析[J]. 华南理工大学学报（自然科学版）, 2005, 33(7): 6-10.

Guo Xin-yan Huang Pei-yan Zheng Xiao-hong. M echanical Analysis of RC Beams Strengthened by Prestressed FRPs[J]. Journal of South China University of Technology (Natural Science Edition), 2005, 33(7): 6-10.