Comparative Study of Seismic Design for Different Bridges Structures

The main objective of this study is to compare the structural members capacity between different types bridges structures under seismic load. results modal analysis showed that models box girder bridge, precast T and U steel bridge had higher values natural frequency comparing with others Pushover in transvers direction bent No. 2 which was located middle superstructure displaced more than 1 3. In longitudinal direction, Precast I value displacement structures, it maximum displacement. demand ratio critical member demand/capacity 1.0 or near from especially indicating these will be subjected failure 2. Therefore, there needing redesign bents by increasing numbers piers, using high strength materials construction bents, dimensions piers pier caps. internal forces axial force, horizontal shear, bending moment for all structures. Also, can seen models, agree pushover method.