Research on Bridge Damage-Reduction Seismic Performance with Variable Parameter Cable-Unseating Prevention Devices

Abstract

The anti-seismic measures is effective in reducing the seismic damage of bridge, unseating prevention device is an effective structural measure to prevent collapse under unexpected earthquake, and its parameter will affect the function of unseating prevention devices. Based on relational design standards, the damage-reduction seismic performance of unseating prevention devices with variational design parameter have been analysis. The research results show that the unseating prevention devices with rational parameters can prevent collapse of the structure; the damage-reduction seismic performance of bridge was influenced by the cable rigidity and primary clearances. The unseating prevention devices will improve the seismic performance and integrality of bridge, but higher requirements have been proposed for the substructure of bridges.