3D Dynamical Study On Bridge-Subgrade Transition

Base on vast literatures and engineering datum, this paper studied the deformation regularity of bridge-subgrade transition, such as, the settlements of transition under dynamic load, the diversification of settlements under different format, material stiffness, and dimension. Content of this paper are as follows:1. The dynamic loads, which are acted on roadbed is very complex. Based on the results of the site test, the regularity of the traveling load was simply confirmed.2. The finite difference model was established by using program FLAC^3D, the longitudinal, transverse and in-depth settlements of transition under dynamic load were simulated, and the influence of different factors such as format, material stiffness, and dimension is also studied.3. The three-dimensional numerical simulation results was Compared with the site test results, some conclusion was gained.