| CFRP板加固含裂纹受拉钢板的疲劳性能研究 |
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| 引用本文： | 郑云,叶列平,岳清瑞. CFRP板加固含裂纹受拉钢板的疲劳性能研究[J]. 工程力学, 2007, 24(6): 91-97 |
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| 作者姓名： | 郑云 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;清华大学土木工程系,北京100084;清华大学结构工程与振动教育部重点实验室,北京100084;中冶集团建筑研究总院,北京,100088 |
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| 摘 要： | 根据线弹性断裂力学理论,采用“三维块体-弹簧-板”有限元模型对裂纹尖端的应力强度因子幅值进行计算,并基于Paris-Erdogan裂纹扩展模型,提出了CFRP板加固含裂纹受拉钢板的疲劳寿命预测方法。然后对4个CFRP板加固含初始疲劳裂纹钢板的受拉疲劳性能进行了试验研究,考察了碳纤维板加固量、单面和双面加固方式对疲劳性能的影响。试验结果表明,CFRP板加固钢板的疲劳寿命比未加固钢板显著提高,疲劳裂纹扩展的试验结果与预测结果符合较好。
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| 关 键 词： | 碳纤维 疲劳裂纹 有限元模型 线弹性断裂力学 疲劳寿命预测 |
| 文章编号： | 1000-4750（2007）06-0091-07 |
| 修稿时间： | 2005-10-212006-06-19 |
STUDY ON FATIGUE BEHAVIOR OF CRACKED TENSILE STEEL PLATES REINFORCED WITH CFRP PLATES |
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| ZHENG Yun,YE Lie-ping,YUE Qing-rui. STUDY ON FATIGUE BEHAVIOR OF CRACKED TENSILE STEEL PLATES REINFORCED WITH CFRP PLATES[J]. Engineering Mechanics, 2007, 24(6): 91-97 |
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| Authors: | ZHENG Yun YE Lie-ping YUE Qing-rui |
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| Affiliation: | 1. Department ofCivil Engineering, TsinghuaUniversity, Beijing 100084, China; 2. Key Laboratory of Structural Engineering and Vibration of China Education Ministry, Tsinghua University, Beijing 100084, China; 3. Central Research Institute of Building and Construction, MCC Group, Beijing 100088, China |
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| Abstract: | The fatigue life prediction method for the steel plates reinforced with carbon fiber reinforced polymer (CFRP) plates was proposed based on the Paris law. The stress intensity factor was calculated with the finite element model presented in the paper. Four steel plates with 10mm long center fatigue crack were tested under the cyclic tensile loads. Several influencing factors on the fatigue behavior of steel members, including the amount of strengthening CFRP plates, the single or double bond mode and the stress range, were investigated. The results indicate that the fatigue life of steel plates reinforced with CFRP plates obviously increased as compared to un-reinforced steel members. The fatigue crack propagation characteristics obtained from experimental results and predictions are in good agreement. |
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| Keywords: | CFRP fatigue crack finite element model linear elastic fracture mechanics fatigue life prediction |
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