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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:

27卷

期数:

2010年04期

页码:

14-18

栏目:

出版日期:

2010-12-20

文章信息/Info

Title:

Effect of Releasing Pretension for Steel Beams Bonded with Prestressed Carbon Fiber Sheet

作者:

周朝阳,黄林,贺学军

中南大学 土木建筑学院,湖南 长沙 410075

Author(s):

ZHOU Chao-yang, HUANG Lin, HE Xue-jun

School of Civil Engineering and Architecture, Central South University, Changsha 410075, Hunan, China

关键词:

受弯构件;  加固;  预应力;  碳纤维布;  放张效应;  反拱

Keywords:

flexural member;  strengthening;  prestress;  carbon fiber sheet;  effect of releasing pretension;  camber deflection

分类号:

TU375.1

DOI:

-

文献标志码:

A

摘要:

基于线弹性物理关系假定和变形协调关系,推导了粘贴预应力片材加固梁张拉力释放后片材预应力和胶层剪应力的分布方程,得到了梁的有效预应力及预应力损失计算公式,并且按共轭梁法推导了预应力引起的反拱计算公式; 利用自主开发的一套简易的张拉锚固装置对碳纤维布施加预应力,然后与工字型钢试验梁粘贴,待胶固化后进行粘贴预应力碳纤维布加固钢梁的放张试验。分析结果表明:试验结果与计算结果吻合很好,理论分析结果具有合理性和正确性,为深入研发预应力碳纤维片材加固技术并建立相关的设计理论奠定了基础。

Abstract:

The effect of releasing pretension was investigated for flexural members externally bonded with prestressed laminate. Based on the assumption of linear elastic physical relationship and the compatibility of deformation, the equations of distribution were derived for stresses of laminate, respectively on interface and at cross sections of a beam. The calculation formulae were obtained for effective prestress and prestress loss. The calculation formulas of camber deflection were deduced by adopting the method of conjugate beam. A set of easy prestressing devices was developed to exert pretension to carbon fiber sheet. The prestressed strip was mechanically anchored at both ends and then bonded to a steel beam with I-shaped section. After the adhesive dried the mechanical anchor was loosed, the effect of releasing pretension was measured. Analysis results show that the test results agree well with the calculated results, and the rationality and correctness of the theoretical expressions are verified. This will serve as the foundation for the further development of strengthening technology with prestressed carbon fiber sheet and establishment of the related design theory.

参考文献/References:

[1] 周朝阳,贺学军,王兴国,等.连续纤维加固结构技术及其发展中的若干问题[J].施工技术,2003,32(6):4-6. ZHOU Chao-yang,HE Xue-jun,WANG Xing-guo,et al.Some Problems of Structural Strengthening Technology with FRP and Its Development[J].Construction Technology,2003,32(6):4-6.
[2]TRIANTAFILLOU T C,DESKOVIC N,DEURING M.Strengthening of Concrete Structures with Pre-stressed Fiber Reinforced Plastic Sheets[J].ACI Structure Journal,1992,89(3):235-244.
[3]TRIANTAFILLOU T C,DESKOVIC N.Innovative Prestressing with FRP Sheets:Mechanics of Short-term Behavior[J].Journal of Engineering Mechanics,1991,117(7):1652-1672.
[4]GARDEN H N,HOLLAWAY L C.An Experimental Study of the Failure Modes of Reinforced Concrete Beams Strengthened with Prestressed Carbon Composite Plates[J].Composites Part B,1998,29(4):411-424.
[5]QUANTRILL R J,HOLLAWAY L C.The Flexural Rehabilitation of Reinforced Concrete Beams by the Use of Prestressed Advanced Composite Plates[J].Composite Science and Technology,1998,58(8):1259-1275.
[6]飞 渭,江世永,彭飞飞,等.预应力碳纤维布加固混凝土受弯构件试验研究[J].四川建筑科学研究,2003,29(2):56-60. FEI Wei,JIANG Shi-yong,PENG Fei-fei,et al.Experimental Study on Flexural Strength of RC Beams Strengthened with Prestressed CFRP Sheets[J].Building Science Research Sichuan,2003,29(2):56-60.
[7]尚守平,彭 晖,童 桦,等.预应力碳纤维布材加固混凝土受弯构件的抗弯性能研究[J].建筑结构学报,2003,24(5):24-30. SHANG Shou-ping,PENG Hui,TONG Hua,et al.Study of Strengthening Reinforced Concrete Beam Using Prestressed Carbon Fiber Sheet[J].Journal of Building Structures,2003,24(5):24-30.
[8]王兴国,周朝阳,曾宪桃,等.外贴预应力GFRP板加固混凝土梁抗弯试验研究[J].哈尔滨工业大学学报,2005,37(3):351-354. WANG Xing-guo,ZHOU Chao-yang,ZENG Xian-tao,et al.Tests of Flexural Behavior of RC Beams Strengthened by Bonding Prestressed GFRP Plates[J].Journal of Harbin Institute of Technology,2005,37(3):351-354.
[9]周朝阳,王兴国.端锚有粘结预应力纤维片材加固混凝土梁的受弯承载力[J].中国铁道科学,2006,27(4):45-50. ZHOU Chao-yang,WANG Xing-guo.Flexural Strength of Reinforced Concrete Beams Pre-stressed with End-anchored and Length-bonded FRP Laminates[J].China Railway Science,2006,27(4):45-50.
[10]周朝阳,王兴国,肖菲菲.先张后粘FRP的钢筋混凝土构件抗弯能力分析[J].中南大学学报:自然科学版,2006,37(1):183-187. ZHOU Chao-yang,WANG Xing-guo,XIAO Fei-fei.Analysis of Flexural Capacities for RC Members Bonded with Pre-tensioned FRP[J].Journal of Central South University:Science and Technology,2006,37(1):183-187.
[11]曾宪桃,王兴国,丁亚红.粘贴预应力FRP板加固砼梁预应力方法的研究[J].焦作工学院学报:自然科学版,2002,21(3):222-225. ZENG Xian-tao,WANG Xing-guo,DING Ya-hong.Several Experimental Methods of RC Beam Strengthened with Prestressed FRP Plates[J].Journal of Jiaozuo Institute of Technology:Natural Science,2002,21(3):222-225.
[12]卢亦焱,陈 娟,黄银燊,等.预应力FRP加固工程结构技术研究进展[J].中国工程科学,2008,10(8):40-44. LU Yi-yan,CHEN Juan,HUANG Yin-shen,et al.New Progress in Study of the Technology of Strengthening Structures with Prestressed Fiber Reinforced Plastics[J].Engineering Sciences,2008,10(8):40-44.
[13]程永春,李春良,刘寒冰,等.碳纤维与混凝土界面粘结应力计算方法[J].交通运输工程学报,2007,7(2):46-49. CHENG Yong-chun,LI Chun-liang,LIU Han-bing,et al.Computation Method of Interfacial Stresses Between CFRP and Concrete[J].Journal of Traffic and Transportation Engineering,2007,7(2):46-49.
[14]邬晓光,张柳煜,郝 毅,等.碳纤维加固钢筋混凝土梁的受弯全过程分析[J].长安大学学报:自然科学版,2008,28(2):53-57. WU Xiao-guang,ZHANG Liu-yu,HAO Yi,et al.Flexural-tensile Strength of Concrete Beams in Complete Course of Reinforcement with Carbon-fiber-reinforced-polymer(CFRP)[J].Journal of Chang'an University:Natural Science Edition,2008,28(2):53-57.

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备注/Memo

备注/Memo:

收稿日期:2010-08-10
基金项目:国家自然科学基金项目(50778176); 湖南省自然科学基金重点项目(08JJ3105); 湖南省自然科学基金重点项目(09JJ3098); 湖南省建设科技计划项目(2007-31); 湖南省科技计划重点项目(2010FJ2001)
作者简介:周朝阳(1964-),男,湖南衡阳人,教授,博士研究生导师,工学博士,E-mail:joezycn@163.com。

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更新日期/Last Update: 2010-12-20