Abstract
Roller bearings of curved viaducts generate large displacements which lead to damage of bearings or pounding damage at expansion joints between adjacent superstructures. In this study, dispersed steel stoppers are installed near each roller bearing to reduce seismic damage due to large displacements of roller bearings. The concentrated pounding phenomenon between adjacent superstructures can be transferred to the dispersed steel stoppers. Shock absorber devices (SADs) are also installed at each steel stopper to mitigate pounding forces. The effectiveness of SAD stiffness on reducing viaduct damage is analyzed. The pounding forces at steel stopper, displacements on the top of piers, displacements of superstructures, curvatures at pier bases, and the relationships of bending moment and curvature are studied accordingly. The application of SADs with high stiffness can mitigate viaduct damage in earthquakes.
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