| Title |
A Study on Analysis Method of Asphalt Plug Joint using FEM |
| Keywords |
asphalt plug joint;expansion;viscosity;strain rate;finite element method;신축;점성;변형속도;유한요소법 |
| Abstract |
Asphalt Plug Joint(APJ) is a new type of expansion joint that it"s application are increased in USA as well as several European countries. APJ"s" advantages are cheap construction and maintenance costs, and simple construction and securing of excellent flatness. However, APJ"s usability is hindered because it showed a problem of premature failure. Research for solving this problem has been progressed, and FEM analysis among existing researches was peformed. However, the behavior of APJ was insufficiently analyzed and the reliability of the analysis was much low, since the material showing complicated behavior was oversimplified, Therefore, a material model was proposed and its effectiveness was confirmed by comparing it with actual behavior in order to improve the reliability of FEM analysis in this paper. ABAQUS program was used for FEM analysis, and an elasto-plastic model and a viscous-plastic model as the material model of APJ were suggested on the base of experiment results of APJ material performed by Bramel et al. The elasto-plastic model was defined by time-independent analysis since it didn"t consider time and strain rate, and the viscous-plastic model was defined by time-dependent analysis since it considered. Influence of various elements affecting the behavior of APJ was investigated, and it was confirmed that the time-dependent analysis showed better result closed to actual behavior than the time-independent analysis. |