Comparative Research on Modes of Longitudinal Unseating Prevention System for Continuous Bridge

Abstract:

Domestic unseating prevention system without design is done as construction measures,which,therefore,can’t ascertain the effect of unseating prevention system.As for the mode of unseatprevention,connection device between girders is applied in Japan,however,bridges in America usually adopts the restrainers between girder and pier.Two modes of unseating prevention system for the continuousgirder bridges is compared by nonlinear timehistory method.Different period ratio and collision of two continousbeam bridge is considered to the modes of unseating prevention system.Results show:it is rational to mode of restrainers between girder and pier for the continuous bridges.

Key words:unseating prevention mearsures; restrainers; unseating