ABSTRACT
The traditional concrete airport pavement is prone to surface cracking, pavement panel fracture, and other diseases. To improve the strength and service life of pavement, this paper proposes a composite airport pavement structure of regular concrete (RC) and high ductility concrete (HDC). Three airport pavement structures, namely the HDC single-layer slab, RC single-layer slab, and RC and HDC composite slab, are designed. A finite element software ABAQUS was used to establish a three-dimensional rigid pavement finite element model considering base support, joint load transfer capacity, and complex landing gear. The stress responses of the pavement under different landing gear loads, different pavement structures, surface layer thickness, and soil foundation strength were analyzed. For the same pavement structure, the slab edge stress is the largest under a load of single-axle and single-wheel landing gear and is the smallest under a load of double-axle and double-wheel landing gear. Under the same aircraft pavement, the edge stress of the HDC single-layer slab is the largest, and that of the RC single-layer slab is the smallest. With the increase of concrete slab thickness, the edge stress decreases obviously, and the RC and HDC composite slab decreases most. With the increase of soil foundation strength, the edge stress decreases obviously, and the edge stress of HDC single-layer slab decreases most.
