ABSTRACT
ABSTRACT Chaijiaxia Yellow River Bridge is a curved cable-stayed bridge with two uneven pylons located in a seismic active region. Seismic design is imperative to guarantee the life-cycle performance of the bridge. The spatial mechanical feature in the bridge makes the transverse forces and displacements an important issue to solve during the earthquakes. Preliminary analysis indicates that seismic isolation is required for the bridge under E2 earthquake effect. In order to ensure the seismic performance, a newly developed type of steel triangular plate damper is adopted, which provides transverse damper and allows longitudinal movement. Basic parameters of the steel damper is selected based on the seismic requirements of the bridge. Analysis results indicate that the seismic response of the bridge decreases significantly with the dampers and the seismic isolation design satisfies the seismic resistance requirements.
