Analysis of Dynamic Damage of Airport Rigid Pavement under Pickaxe Machine Breaking Load

In order to determine the technical parameters for airport rigid pavement demolition reasonably, a finite element model of rigid pavement was established using the ABAQUS software, and a half-sine impact load was imposed on the rigid pavement to analyze its dynamic responses under pickaxe machine breaking load. The dynamic responses including vertical displacement and tensile stress were calculated by systematically considering load parameters and pavement structure parameters. The simulation results show that the magnitude and position of load have a significant influence on the dynamic responses of rigid pavement. The thickness of slab has a great influence on the tensile stress and little effect on the vertical displacement. Under the example condition, the dynamic responses become prominent only when joint load transfer capacity is below 80%. The location of impact load should not be within 30 cm away from the edge of slab so as to mitigate the dynamic damage of reserved slab.