Abstract
In recent years many reinforced concrete viaducts have been used for important traffic facilities, so it is vary important to evaluate their behavior during a big earthquake. In this analysis the interaction between the structure and the ground is taken into consideration. The purpose of this study is to evaluate the behavior of 2-story reinforced concrete viaduct during strong earthquakes and to consider the effect of ground characteristics on the dynamic behavior of such structures using the sway-rocking ground spring model. The following results are described from this study : (1) the increase of natural period of the structure which is accompanied by the damage is recognized, (2) the significant difference of the behavior of the structures is recognized even if they are built on the site of the same ground classification, and (3) the dynamic response of structure is influenced by the characteristics of the input earthquake waves.
