关键词: 机场道面, 道面不平整度, 国际平整度指数, 三角级数合成法, 有限元模拟

Abstract: In order to study the influence of airport pavement roughness on the joint load transfer performance, a finite element model of roughness is established based on international roughness index (IRI) to simulate the dynamic load effect of aircraft on the pavement. The effects of three different load forms and seven different dynamic load coefficients on the loading performance and mechanical properties of the pavement are analyzed. Results show that the trigonometric series synthesis method can be used to simulate the roughness of different grades of the pavement. The displacements on both sides of the joint and the bending and tensile stresses at the bottom of the plate under the loading of pavement roughness are higher than those under the static load and the smooth moving load. When the dynamic load coefficient increases from 1.00 to 1.30, the deflection load transfer coefficient of the joint and the load distribution coefficient of the key force transmission bar basically remain unchanged, while the shear force transfer coefficient of the force transmission bar, the bending tensile stress at the bottom of the plate and the interface stress between the concrete and the force transmission bar all increase by about 28%. It can be seen that the influence of the roughness on the shear force transfer, the bending and tensile stress, the vertical stress and the interface stress of the channel plate is very significant. The above conclusions can provide theoretical basis for considering the load transfer of the pavement panel joints in the construction and design of the runway.

Key words: airport pavement, roughness of pavement, international roughness index(IRI), trigonometric series synthesis method, finite element simulation