Study On Mechanical Properties Of The Long And Large Longitudinal Bridge Deck Pavement Interlayer Contact

The desease of the bridge deck pavement builded on the long and large longitudinal slope has become increasingly prominent, about which cause many scholars to Highly concerned. Mode of action of the force in it is very different from an ordinary deck pavement structure, the reason lies in the repeated acceleration and braking of vehicles traveling on the bridge deck pavement under high temperature conditions, the bridge deck pavement put a greater level of horizontal force, as well as overloading of the frequent occurrence,which cause serious disease in thehe bridge deck pavement builded on the long and large longitudinal slope than the general Decks.Due to the impact of materials, construction, and the external environment, bonding between layers becomes the weakest link in the bridge deck. Many studies are carried out on the basis of the layers completely continuous or smooth, In fact the layer can not be achieved completely continuous, usually in the part of the smooth and part of the continuous state. Therefore, orderly simulating the contact state between layers is the primary problem.In this paper, on the basis of assuming that the asphalt concrete is the viscoelastic material, consideing the contact state between different layers,it is based on Ansys software to establish t finite element model of the long and large longitudinal slope bridge deck pavement.Analyze failure mechanism of the slip between the layers and the destruction of U-shaped, then put forward different mechanical control indicators. Research the state of rut depth under the condition of differen contact between layers and analyze its rut type of composition, as well as the contribution rate of the layers on the rut. Analyze the main of the bridge deck pavement disease failure mechanism, then based on the failure mechanism of the mechanical put forward the control indicators. It combines the characteristics of the long and large longitudinal slope bridge deck pavement, selecting influencing factors:slope, inter-layer contact and load size,and analyze the main causes of the deck pavement disease.As the frequent low-speed of vehicle phenomenon and acceleration and deceleration on the long and large longitudinal slope bridge deck, the horizontal force applied to the bridge deck pavement increse, resulting in the internal forces of the pavement changing greatly. So this paper conducts special studies on the level of force and speed impact on the internal force of the pavement, and analyze the force characteristics between the long and large longitudinal slope bridge deck pavement and the ordinary Decks force characteristics.Take into account of the impact of the bridge deck pavement thickness, waterproof layer modulus and thickness of the waterproof layer, based on the orthogonal analysis of variance theory, it has analyzed mechanics of the factors impact on indicators of the different diseases of the mechanical control.On the basis of the above analysis, it has proposed specific disease prevention measures for the long and large longitudinal slope bridge deck pavement, in order to to provide a theoretical basis to the technology program of the design, construction and maintenance.