Various aspects relevant to precast segmental bridges such as vibration characteristics, Behaviour of pre-stressing tendons, methods of improving ductility are addressed towards estimating dynamic response and resisting seismic forces. Findings of several International codes and recent worldwide research are discussed. The discussion and conclusions provided herein will be useful in designing precast segmentally constructed bridges against high seismic forces with greater reliability. The bridge is designed to resist seismic forces in which certain parts of the structure are allowed to yield (ductility) to dissipate energy. In the precast segmental construction, various segments (transverse slices) normal to the longitudinal axis of the bridge are joined together with or without use of epoxy. The segment-to-segment joints can undergo large displacement and rotation of repeated opening and closure under reversed cyclic loading induced in seismic events. Therefore, designing the precast segmental bridge resisting high seismic forces is more challenging; as it offers a more complex Behaviour and the ductility demand imposed by substructure may be more than conventional bridges.

Keywords : Safety in construction, Dynamic analysis, Damping of structure, Ductile Behaviour, Bhopal REGION.