预应力碳纤维布加固混凝土梁弯曲疲劳性能试验研究

张轲; 叶列平; 岳清瑞

doi:10.13204/j.gyjz200508004

预应力碳纤维布加固混凝土梁弯曲疲劳性能试验研究

doi: 10.13204/j.gyjz200508004

1.
1. 清华大学?土木工程系?北京?100084;
2.
2. 中冶集团建筑研究总院?北京?100088

基金项目:

国家自然科学重点基金(编号:50238030);国家863研究计划(编号:2001AA336010)资助项目。

详细信息

作者简介:
张轲,男,1976年12月出生,工学博士

中图分类号: TU375.2
计量
- 文章访问数: 90
- HTML全文浏览量: 8
- PDF下载量: 142
- 被引次数: 0
出版历程
- 收稿日期: 2005-04-10
- 刊出日期: 2005-08-20

EXPERIMENTAL STUDY ON FLEXURAL FATIGUE BEHAVIOR OF RC BEAMS STRENGTHENED WITH PRESTRESSED CFRP SHEETS

1.
1. Department of Civil Engineering,Tsinghua University Beijing 100084;
2.
2. Central Research Institute of Building and Construction,MCC Group Beijing 100088

摘要

摘要: 目前，对预应力碳纤维布加固梁的疲劳性能研究甚少。通过对7根预应力碳纤维布加固混凝土T形梁弯曲疲劳性能的试验研究，考察了预应力碳纤维布加固量、钢筋配筋率、等幅变幅疲劳以及加固前疲劳损伤对加固梁疲劳性能的影响。试验结果表明，与非预应力碳纤维布加固梁相比，预应力碳纤维布加固后混凝土梁中受拉钢筋应力幅显著降低，混凝土梁疲劳寿命明显延长。
- 预应力 /
- 碳纤维布 /
- 加固 /
- 混凝土梁 /
- 疲劳
Abstract: Externally bonded prestressed carbon fiber reinforced polymer(CFRP)sheets for reinforced concrete(RC) beams strengthening is becoming an effectiveness strengthening method recently,especially to increase the service life under fatigue loading.Though there are some researches on the behavior of RC beams strengthened with prestressed CFRP sheets under static loading,however,researches on the improvement of fatigue performance are very limited. In this paper, the flexural fatigue behavior of RC beams strengthened with prestressed CFRP sheets is investigated with 7 specimens,in which the influences of strengthening amount of prestressed CFRP sheets,ratio of reinforcement,variable -amplitude fatigue loading and damage before strengthening are taken into consideration.Experimental results show that the stress amplitude of the tensioned bar is decreased remarkably and the fatigue life is then obviously increased as compared to normal strengthening method.
- prestress /
- CFRP sheets /
- strengthening /
- RC beam /
- fatigue

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参考文献(6)

飞渭,江世永,等.预应力碳纤维布加固混凝土受弯构件试验研究.四川建筑科学研究,2003,29(2):56～60;

[2] 尚守平,彭晖,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.建筑结构学报,2003,24(5):24～30;

[3] 叶列平,庄江波,沙吾列提拜开依,等.预应力碳纤维布加固钢筋混凝土T形梁的试验研究.见:第七届全国建筑物鉴定与加固改造学术会议论文集.重庆.2004.895～903;

[4] Triantafillou T C,Deskovic N,Deuring M.Strengthening of Concrete Structures with Prestressed Fiber Reinforced Plastic Sheets.ACI Structural Journal,1992,89(3):235～244;

[5] 沙吾列提拜开依,叶列平.预应力CFRP布加固钢筋混凝土梁的施工技术.施工技术,2004,33(6):23～24;

[6] 张轲.预应力碳纤维布加固混凝土梁弯曲疲劳性能研究.[博士学位论文].北京:清华大学.2005

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