Structural Performance of Unseated Composite Multi-Girder Bridges

摘要

In development countries, unseating of bridge bearings is one of the problems that results from carrnor ship accidents, pier tilting, seismic forces, fatigue or even theft of bearing in poor countries.rnThere will be a time period that may be short or long shortly after bridge unseating that occupiedrnwith traffic. The amplification of the straining actions on adjacent neighboring girders needs specialrnattention that was carried out through deep parametric study. The parameters studied in this researchrnwere the relative stiffness of end cross girders to main girders, the spacing of cross girders, thernstiffness of the intermediate cross girders, the spans of the bridge and the deck thickness. Importantrnout-comings were drawn out from the analysis for the increase of the straining actions due to therneffect of the loss of bearings in composite bridges and the most effective parameters.