Abstract

In this paper, we implement the combined method of drilling stop hole and FRP reinforcement to repair cracked steel plates subjected to cyclic tension. The crack initiation and growth are experimentally investigated. The stress distribution at the stop hole and the residual fatigue life are evaluated by the FEM. The effects on prolonging residual fatigue life are analyzed. The results show that the effectiveness of only using the stop hole is limited, while the combined method has dramatically prolonged the residual fatigue life. The effect mainly owes to the increasing of the crack initiation life from the stop hole.

中文翻译：

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FRP加止动孔加固开裂钢板疲劳性能研究

摘要

在本文中，我们实施了钻孔和玻璃钢加固相结合的方法来修复在循环张力下开裂的钢板。对裂纹的萌生和扩展进行了实验研究。停止孔处的应力分布和残余疲劳寿命由有限元法评估。分析了延长剩余疲劳寿命的效果。结果表明，仅使用止动孔的效果是有限的，而组合方法显着延长了剩余疲劳寿命。这种影响主要是由于停止孔的裂纹萌生寿命增加。