• Journal of Korean Society of societal Security
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• v.1 no.2
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• pp.79-85
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• 2008

In this study, a new procedure (Unified Dynamic Analysis Method) to evaluate the dynamic responses a bridge under earthquakes is proposed, which is not only considering the bridge motions but also the soil layer motions nearby the bridge footing in order to include the soil-structure interactions. lt is found that the dynamic responses of the whole bridge systems can be properly evaluate from using the proposed UDAM. The properties of the soil layers where the bridge is located can be included into the seismic analysis, and the multi-seismic excitations can also be considered easily.