Research on steel bridge deck pavement mechanical response of Urumqi express way

Abstract

The cold climate of Urumqi influences the pavement performance of steel bridge. Mechanical response and suitable pavement system of Urumqi express way steel bridge deck pavement were studied in this paper. ABAQUS was utilized to build a model of steel bridge deck pavement. Maximum tension stress, maximum tension strain, maximum vertical displacement and maximum inter-laminar shearing stress of “double EA” pavement structure and “lower EA+upper SMA” pavement structure under different pavement thicknesses and different ambient temperatures were calculated. Results indicate that when both the pavement materials of upper layer and lower layer of pavement structure are same, the maximum tension stress, the maximum tension strain, the maximum vertical displacement and the maximum inter-laminar shearing stress of “lower 3cm+upper 4cm” pavement structure are smaller than both “lower 2.5cm+upper 3.5cm” pavement structure and “lower 3cm+upper 3.5cm” pavement structure; at the range of -45°C ~ 70°C, when the pavement materials of upper layer and lower layer of pavement structure is different, the increase of temperature will lead to the decrease of maximum tension stress and maximum inter-laminar shearing stress and will also lead to the increase of the maximum tension strain and the maximum vertical displacement; the maximum tension stress of “double EA” pavement structure is larger than “lower EA+upper SMA” pavement structure; the maximum tension strain, the maximum vertical displacement and the maximum inter-laminar shearing stress of “double EA” pavement structure are close to “lower EA+upper SMA” pavement structure; the “lower 3cm EA+upper 4cm SMA” pavement structure is recommended for the steel bridge deck pavement of Urumqi expressway.