| dc.description.abstract | Nowadays, the steel bridge is one of the choices for designing. Because the structure of steel deck pavement on the steel bridge is different with the general road pavement, this study used the three-dimensional finite element model of steel deck pavement to model the mechanical responses of steel deck pavement under different conditions of loading types, load positions, and pavement material combinations, and then found the maximum value of maximum principle tensile strain (MPE-T) and vertical compressive strain (E33-C) in the pavement to do the steel deck pavement damage analysis.
The results for steel deck pavement show that, for easy to maintenance, the better pavement material combination is the pavement material with greater stiffness being placed in the bottom, and lower one placed in the top to control the pavement whose surface course occurs damage first. The maximum value of MPE-T in the pavement is influenced by relative positions of loads, ribs, and floor beams. When the center of loading moves along the top of ribs, the maximum values of MPE-T in the pavement are more than the others. These values are located on the bottom of surface course and below the two sides of tires, where can be regarded as the locations where fatigue cracking occurs. The distribution of E33-C is influenced by pavement design and wheel load istribution. For example, E33-C concentrates on surface course for the better pavement material combination, and distributes unevenly for some special conditions. The front and rear axles of dual-tandem wheels do not influence with each other for the change tendency of MPE-T and E33-C in the pavement, but still cause small differences for the maximum values of them. | en_US |