강상자형 연속교에서 콘크리트재를 이용한 부모멘트 구간의 강성향상공법

A Study for Stiffness Improvement Method with Use of Filled Concrete in Continued Steel Box Girder Bridge

The stiffness of slab concrete section is not considered as effective in the existing method of construction for continued steel box girder bridge. Using lifting system and filled concrete, it is possible to make stiffness of slab concrete section effective and improve stiffness of negative moment section. It was proved that the stress of upper flange in positive moment is significantly lower than case of existing method through the stress comparison. This stress difference made possible to rearrange flange thickness and as the result of this rearrangement, the amount of steel and height of girder can be reduced up to 13.23% and 11.5%.