THE DESIGN METHOD OF ENERGY-DISSIPATED EARTHQUAKE-REDUCTION OF CANGKOU CABLE-STAYED BRIDGE ON QINGDAO BAY *

摘要

Based on the project of Cangkou Navigable Bridge on Qingdao Bay, the viscous dampers are proposed to install between the deck and pylon to improve the longitudinal seismic response of the bridge structure. The viscous dampers are proposed to install between the deck and transition (auxiliary) piers, the lead extrusion dampers are proposed synchronously to install between the deck and pylon to improve the transversal seismic response of the bridge structure. Analysis show that the adoption of traditional earthquake-reduction design will cause the great earthquake reaction of pylon which will control the structural design. The longitudinal and transversal earthquake reaction of the bridge can be reduced effectively and the internal forces of piers and pylons can be balanced by the application of damped energy-dissipated earthquake-reduction technique, and can be used as reference to engineering practice.