ANALYTICAL STUDY OF THREE DIMENSIONAL STATICAL BEHAVIOR OF NARROWED BOX GIRDER BRIDGE

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  • 中間横桁を省略した狭小箱桁橋の3次元変形挙動の解析的検討
  • チュウカン ヨコゲタ オ ショウリャク シタ キョウショウ ハコケタバシ ノ 3ジゲン ヘンケイ キョドウ ノ カイセキテキ ケントウ

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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.<br>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.

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