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Temporary Stresses by Applying Construction Methods for Continuous Steel-Concrete Double Composite Box Girder Bridges  

Choi, Hang Yong ((주)서영엔지니어링 구조설계실)
Suh, Suk Koo ((주)서영엔지니어링 구조설계실)
Oh, Myung Seok ((주)서영엔지니어링 구조설계실)
Oh, Sae Hwan ((주)서영엔지니어링 구조설계실)
Kim, Hee Sung ((주)서영엔지니어링 구조설계실)
Publication Information
Journal of Korean Society of Steel Construction / v.19, no.6, 2007 , pp. 681-693 More about this Journal
Abstract
Construction techniques for continuous steel bridges were applied to steel-concrete double composite box girder bridges. Concrete depth and length at the bottom of the steel box in the negative moment region were determined by plastic moment region and negative moment region of the double composite section, respectively. Construction methods, such as crane lifting method, free cantilever method, and incremental launching method were used for the analysis of the construction stage. Two cases of the construction phase were considered and analyzed for the stress resultant of double composite girders. The behavior of the nose-deck elastic system was examined by three-dimensionless parameters, such as the nose length, the unit weight of the launching nose, and the flexural stiffness of the nose. The adoption of the launching nose has become an effective solution in the incremental launching of steel-concrete double composite box girder bridges.
Keywords
double composite; box girder bridge; crane lifting method; free cantilever method; incremental launching method; launching nose;
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