ElasticPlastic Energy Dissipating Bearing for Seismic Design of Selfanchored Suspension Bridge with Single Tower

Abstract:

A new kind of elasticplastic energy dissipating bearing is applied to the seismic isolation design of the Nanjing Jia River Bridge, a typical selfanchored suspension bridge with single tower. Parameter sensitivity analysis are conducted for the bearing design through nonlinear dynamic timehistory analysis. The results show that compared with the responses of the floating type, the longitudinal displacement of main girder is reduced to 20% while the inner forces are almost as the same. The lateral seismic responses are also reduced to 15%~50% of the conventional lateralfixed system. It indicates that the elasticplastic energy dissipating bearing can be effectively applied to the seismic isolation design of selfanchored suspension bridge with singletower.

Key words:elasticplastic energy dissipating bearing; selfanchored suspension bridge; aseismatic design