2014 年 2 巻 1 号 p. 276-284
A laboratory experiment on strain change with time in asphalt mixture under dynamic load was carried out in 2010 as previously reported, using composite specimens of asphalt mixture and a steel plate. The results revealed that tensile strain could occur in asphalt mixture under positive bending condition in many cases, depending on the pavement structure, test temperature, or loading time. The current study aimed at reproducing the strain behavior observed during the previous experiment by using linear visco-elastic analysis. The analysis verified that there could be many cases where tensile strain was induced in the asphalt mixture on a steel plate even under positive bending condition, successfully reproducing the strain behavior, which was irreproducible by elastic analysis. strain recovery increased in the steel plate with the decrease in load from the maximum level, the strain in the asphalt mixture changed from compressive to tensile, with larger tensile strain induced closer to the surface of the asphalt mixture. The strain behavior after the maximum load was irreproducible by elastic analysis.