Abstract
By narrowing the box girder width, it is expected that overall costs will effectively be reduced. Moreover, by increasing slab thickness, it is possible to omit stringers in addition to decrease the box girder width. Thus box girder fabrication productivity and bridge durability are greatly improved. If torsional rigidity of the box girder is decreased and the floor slabs became thicker, the amount of required cross-beams can be also reduced.
This paper is concerned with an analytical study focusing on the following points: (1) the validity of omitting cross-beams in the narrowed box girder bridges and (2) in which MSC-NASTRAN was utilized throughout to conduct 3D finite element analysis.
