| 预应力碳纤维布加固混凝土梁弯曲疲劳性能试验研究 |
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| 引用本文： | 张轲,叶列平,岳清瑞.预应力碳纤维布加固混凝土梁弯曲疲劳性能试验研究[J].工业建筑,2005,35(8):13-19. |
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| 作者姓名： | 张轲 叶列平 岳清瑞 |
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| 作者单位： | 清华大学,土木工程系,北京,100084;中冶集团建筑研究总院,北京,100088 |
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| 基金项目： | 国家自然科学重点基金（编号：50238030）和国家“863”研究计划（编号：2001AA336010）资助项目. |
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| 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。
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| 关 键 词： | 预应力 碳纤维布 加固 混凝土梁 疲劳 |
| 收稿时间： | 04 10 2005 12:00AM |
| 修稿时间： | 2005年4月10日 |
EXPERIMENTAL STUDY ON FLEXURAL FATIGUE BEHAVIOR OF RC BEAMS STRENGTHENED WITH PRESTRESSED CFRP SHEETS |
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| Zhang Ke,Ye Lieping,Yue Qingrui.EXPERIMENTAL STUDY ON FLEXURAL FATIGUE BEHAVIOR OF RC BEAMS STRENGTHENED WITH PRESTRESSED CFRP SHEETS[J].Industrial Construction,2005,35(8):13-19. |
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| Authors: | Zhang Ke Ye Lieping Yue Qingrui |
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| Affiliation: | Department of Civil Engineering,Tsinghua University Beijing 100084;Central Research Institute of Building and Construction, MCC Group Beijing 100088 |
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| 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. |
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| Keywords: | prestress CFRP sheets strengthening RC beam fatigue |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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