| This paper presents a simplified method of assessing the seismic performance of existing Japanese highway bridge foundations. The seismic performance of existing bridge foundations of various types was assessed by classification into five damage levels on the basis of damage experienced in past earthquakes and numerical analysis methods. Using these results， a flow chart is proposed to assess the seismic performance of bridge foundations according to the damage levels by using existing fundamental bridge data， geological data， and inspection data. This flow chart will be used to prioritize seismic retrofitting of bridge foundations. |
