;In this study, finite element method software ABAQUS was used to analyze 3D steel deck pavement structure, and the stress intensity factor analysis of the reflective crack. The stress-strain and stress intensity factors and stress intensity factors corresponding to the different stress forces were obtained. Considering the effects of different forces, the corresponding stress-strain and stress intensity factors are obtained. The stress intensity factor is calculated by the ABAQUS software built-in loop integration method, which makes the calculation result have certain accuracy. Steel deck structure is different from general pavement analysis, because general pavement can be regarded as a large homogeneous plate. The steel deck pavement structure must be regarded as a more complex structure. Therefore, the use of wheel load in different locations to find out the maximum tensile strain at the bottom of the pavement can be regarded as reflection cracks may occur. This research calculate the stress intensity factor of reflective crack, including the values of three modes stress intensity factors. Explore the location and cause of the occurrence of reflective cracks. Finally, it is judged which modality may cause damage to the pavement. And changing the material parameters to compare the effects of stress intensity factor. At present, there are not many studies related to the analysis of cracks in steel bed linings at home and abroad, so there is not enough data as verification. Therefore, based on the research of general paving literature and steel deck structure for research. Each researchers can reference and compare.
