Abstract
The purpose of this project is to investigate the validity of seismic soil-foundation-structure interaction analysis of a typical California highway bridge structure subjected to near-fault ground motions. A three-dimensional nonlinear finite element model of Meloland Road Overcrossing was developed. The model included a combination of elements including shell elements for the bridge deck. The column and piles were modeled using frame elements. Abutment-backfill and ground soil were simulated using nonlinear springs. The complete bridge system was subjected to three-component recorded free-field earthquake motions. The resulting dynamic response of the bridge model was found to be in close agreement with motions recorded at various locations on the bridge. This validates the practical application and methodology of this project and may be used for evaluating the seismic response of other typical bridges.