THE STUDY OF FATIGUE CRACK GROWTH RATE WHEN CONSIDER THE IMPACT OF THE CRACK TIP PLASTIC ZONE OF THE CONCRETE

摘要

The traditional Paris formula of concrete structures is not suitable to describe the rate of fatigue crack growth problem, we take into account the impact of the plastic zone and use the restoring force, model was proposed to consider the size effect and residual stress correction into Paris formula. Through the three-point bending concrete beams structural response analysis showed that the modified reaction Paris formula to better physical condition of concrete structures.