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为进一步探讨碳纤维加固复合材料(CFRP)板对钢结构疲劳寿命的延长效果,进行了试验研究和理论分析。利用不同长度的人工裂缝代表不同程度的疲劳损伤。试验结果表明:采用CFRP修复能够有效减缓裂纹扩展并延长疲劳寿命。提出用于预测试件疲劳寿命的理论模型。随后,对其进行了参数分析,研究不同损伤程度下钢板的疲劳性能。深化了对在裂纹扩展不同阶段采用CFRP进行修复的理解,并针对这种加固方法提出了一些有益的建议。
In order to further investigate the effect of carbon fiber reinforced composite materials (CFRP) on the fatigue life of steel structures, experimental research and theoretical analysis were carried out. Using different lengths of artificial cracks represent different degrees of fatigue damage. The experimental results show that the CFRP repair can effectively reduce the crack propagation and extend the fatigue life. A theoretical model for predicting fatigue life of specimens is proposed. Subsequently, the parameters were analyzed to study the fatigue properties of the steel plate under different damage levels. Deepen the understanding of using CFRP for repairing in different stages of crack propagation, and put forward some useful suggestions for this reinforcement method.