ABSTRACT
The work describes the significance of the interrelation between dynamic properties of adjacent bridge structures, soil and bridge structures interaction and spatially non-uniform ground excitation in causing damages to bridge deck and apossible mitigation measure. The spatially varying ground excitations are simulated stochastically based on New Zealand design spectrum for soft soil. A three span bridge structure, footing and subsoil are described using finite elements and boundary elements. The investigation shows that not only spatially non-uniform ground motions but also unequal soil-structure interaction can contribute significantly to the relative movement and increase the damage potential of the bridge girders.
