Research On Interface Stress And Strain State Of Steel Bridge Deck Asphalt Pavement

Investigation of home and abroad the diseases of steel bridge asphalt pavement found that cracking and elapse and bulge etc. diseases caused by the asphalt layer delamination. One of the reasons is the lack of shear properties of waterproof adhesive layer. Whether designing theoretical or experimental research less researched on the stress and strain state of the steel deck pavement waterproof bonding layer. To ensure Xiqiao steel bridge deck pavement interface to achieve practical performance requirements, through laminated beams bending test analysis interfacial shear properties and research stress and strain state bond steel bridge asphalt pavement interface.In this paper, adopting laminated beam bending test to research the interfacial shear properties of steel deck pavement. Because of layer difference between bridge deck and asphalt pavement larger moduli, a greater shear stress at the interface have produced. By adhesive strain gage at the laminated beams to measure strain line and calculate shear strain.Under the same loading conditions, the line strain of bottom pavement was significantly greater than steel top line strain; interfacial shear strain of average size located between the top line and the bottom line strain strain; Waterproof adhesive layer adhesion material impact load transfer, good adhesion waterproof adhesive material in favor of load transfer; Different pavement material modulus, so that different interfacial stress the same location under the same load, the modulus of greater modified asphalt SMA-13 strain than the AC-13 is small.Comparison and analysis of experimental measured linear strain and theoretical values, assuming that the interface is completely continuous calculation result is smaller than the experimental values, so the design specifications what the current design method is partial danger.