Abstract
Although bearings and restrainers have been included in seismic response analysis of bridges, effect of failure of those structural components has not yet been fully analyzed. This paper presents an analysis of a 3-span simply supported bridge which is supported by elastomeric bearings. Steel plate type restrainers or PC strand restrainers are accommodated between decks. It is shown from the analysis that bearings fail progressively from a bearing located at one of the extreme edges due to rotation of decks. It is also shown that design concept to evaluate demand of bearings and unseating prevention devices by simply dividing the total lateral force by number of devices tends to underestimate real demand.
