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工业建筑  2005 

CFRP加固疲劳损伤钢结构的断裂力学分析

DOI: 10.13204/j.gyjz200510024, PP. 79-82

Keywords: 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

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Abstract:

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。

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