In order to study the mechanical response of asphalt pavement structure under the action of non-uniform aircraft wheel load, based on the hypothesis of wheel stripy contact area and tire pattern, the vertical stress function of tire was determined, and then the longitudinal and transverse contact stress of tire was determined based on existing research, the three-dimensional non-uniform contact stress of A380-800, B747-400 and B777-300ER was calculated; based on the three-dimensional finite element analysis model, the mechanical responses of aircraft pavement structure under three-dimensional non-uniform wheel load are obtained, and the differences of mechanical responses of three types of aircraft are analyzed. The results show that the mechanical response of asphalt pavement under three-dimensional non-uniform load is greater than that under uniform vertical load. The influence of load inhomogeneity on the mechanical response of asphalt pavement decreases gradually from asphalt pavement to soil foundation. The mechanical response of asphalt pavement is affected by the maximum taxiing mass of aircraft, landing gear configuration, tire pressure, number of wheels and other factors under three-dimensional non-uniform load. With the increase of modulus of asphalt mixture, the change rate of mechanical response parameters decreases gradually.
Key words: Airport engineering; Non-uniform load; Asphalt pavement; Finite element analysis; Mechanical response.
Key words
Airport engineering /
Non-uniform load /
Asphalt pavement /
Finite element analysis /
Mechanical response.
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