CFRP加固疲劳损伤钢结构的断裂力学分析

郑云; 叶列平; 岳清瑞

doi:10.13204/j.gyjz200510024

CFRP加固疲劳损伤钢结构的断裂力学分析

doi: 10.13204/j.gyjz200510024

1.
1. 清华大学?土木工程系?北京?100084;
2.
2. 国家工业建筑诊断与改造工程技术研究中心?北京?100088

基金项目:

国家自然科学基金项目(编号:50238030);国家863项目(编号2001AA336010)资助。

详细信息

作者简介:
郑云,第一作者,男,1976年7月出生,博士研究生

中图分类号: TU391
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- 文章访问数: 81
- HTML全文浏览量: 12
- PDF下载量: 182
- 被引次数: 0
出版历程
- 收稿日期: 2004-12-20
- 刊出日期: 2005-10-20

FRACTURE MECHANICS ANALYSIS OF STEEL STRUCTURES WITH FATIGUE DAMAGES STRENGTHENED BY CFRP

1.
1. Department of Civil Engineering,Tsinghua University Beijing 100084;
2.
2. National Engineering Research Center for Diagnosis and Rehabilitation of Industrial Buildings Beijing 100088

摘要

摘要: 金属结构，特别是承受反复荷载作用的在役钢结构，通常存在不同程度的缺陷和疲劳损伤。在钢结构的损伤部位粘贴FRP对其疲劳损伤进行加固具有很多优势。对含中央疲劳损伤裂纹钢板粘贴CFRP加固，改善其剩余疲劳寿命进行了理论分析。基于线弹性断裂力学理论，采用有限元计算模型对裂纹前端的应力强度因子进行了计算。并根据Paris_Erdogan裂纹扩展模型，计算了加固前后疲劳损伤钢板的剩余疲劳寿命，验证了这一加固方法的有效性。
- 碳纤维板 /
- 钢结构 /
- 加固 /
- 裂纹 /
- 剩余疲劳寿命 /
- 线弹性断裂力学 /
- 应力强度因子
Abstract: There are defects and fatigue damages with different degrees in metal structures,particularly the in-service steel structures subjected to repeated loads.Many advantages can be got by gluing CFRP to the damaged positions of a steel structure.It is conducted a theoretical analysis of improving the residual fatigue life of a steel plate with central fatigue damage cracks,which is strengthened by CFRP.The stress intensity factor of the crack tip is calculated by a FEM model,based on the theory of linear elastic fracture mechanics;and the residual fatigue life of a steel plate with fatigue damages before and after strengthening is also computed according to Paris-Erdogan crack propagation model,by which the validity of the method is verfied.
- CFRP /
- steel structure /
- strengthening /
- crack /
- residual fatigue life /
- linear elastic facture mechanics /
- stress intensity factor

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参考文献(17)

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