ABSTRACT
The traditional connection between pylon and girder of cable-stayed bridge is fixed, which will cause big force to the end of pylons and wind-resistance bearings. Taking the Shuidongwan cable-stayed bridge as a studying object, according to the design idea of improving the structural performance by adding additional stiffness and damping to find out the appropriate lateral seismic structural system for cable-stayed bridge, re-searched a new kind of elastic-damping wind-resistance bearing (EDWR bearing), which was certified by full-scaled experiment. The influences of three constraint systems, fixed system, elastic system, elastic-damping system on the seismic response of cable-stayed bridge were invested. The result indicates that, for a cable-stayed bridge, especially a super-long-span cable-stayed bridge, lateral fixed system and elastic system are not appropriate seismic-constraint system; elastic-damping system can effectively reduce the lateral structure force and wind-resistance bearing force, which is a suitable lateral seismic-constraint system for cable-stayed bridge.
