This paper describes applicability of the energy based assessment method for soil liquefaction on seismic design of railway bridge piers. In the first place to begin with, a design model of a bridge pier was made, of which bearing capacities of foundation ground were decreased in consideration of soil liquefaction based on a relationships between degradation of soil stiffness and cumulative dissipation energy inputted to the liquefiable layer obtained. According to the result of an energy based assessment, three types of different inertia force determined were applied to the design model, and seismic responses of the bridge pier were calculated. These results obtained were compared with the result calculated according to the stress based assessment for soil liquefaction used in the current design method, which was able to give reasonable response of bridge piers damaged due to soil liquefaction in the past large earthquakes. As a results, it is confirmed that almost the same seismic responses are obtained, if the inertia force could be appropriately determined by the energy based method. This result clearly shows that the energy based assessment for soil liquefaction can be used for seismic design of railway viaducts in consideration of soil liquefaction. Finally, future necessary work items are summarized for developing more rational seismic design with energy based assessment for soil liquefaction.
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