ABSTRACT
The viaduct behaviors and the nearby ground motions under the high-speed train passage have been studied by using the computer simulation. Emphasized here is the soil-foundation-viaduct interaction analysis under moving axle loads. The solution method is to apply the dynamic substructure method in the frequency domain. The viaduct girders including track structure and pier supports are modeled by the three-dimensional beam-column elements. The supporting pile foundation and the near field of ground are discretized by the axisymmetric three-dimensional finite elements in a semi-analytical way. The nearby ground motions during train passage over viaduct have been calculated by superimposing the effects from the neighboring pile foundations. The main parameters affecting the viaduct vibrations are discussed. The results from this studies are validated from the field test data.
