Abstract
It is likely to become a parallel bridge for the correspondence of traffic to the increase and the reasons for the construction efficiency etc. Not being understood enough is a current state in the characteristic though the wind behavior becomes a single bridge and complex the difference when becoming a parallel bridge. Moreover, it is possible that the wind behavior becomes complex by the wind affected by surrounding small-scale terrain around the bridge construction point. In this research, wind tunnel experiment was conducted in order to clarify the influence which surrounding small-scale terrain exerted on the response of parallel box girder bridges to the wind. It has been understood that the response characteristics of parallel box girder bridges are different when surrounding small-scale terrain exists. Effects of the water level of a vertical shore protection, and existence and the slope of an embankment are tested.
