INTERACTION BETWEEN STIFFENING GIRDERS AND A FLOOR SYSTEM IN THROUGH-TYPE ARCH BRIDGES

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  • OSHITA Satoji
    社団法人 土木学会 (株) 横河ブリッジ 橋梁本部技術部

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Other Title
  • 下路式補剛アーチ橋の主構と床組との協同作用と設計方法について

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The interaction between a stiffening girder and a floor system always make some problems in the design of through-type arch bridges. The purpose of this paper is to investigate the relation between rigidity of floor system and additional stress, and to propose a design method for floor system. In order to study the interaction behavior in actual structure, a typical through-type arch bridge was analyzed using 3-D frame model. And, in order to explain the interaction behavior qualitatively, a new approximate formula was proposed by improving Bleich's formula. As the result, this study indicates the rigid design method using a box-type girder as an end floor beam excels what is called as the flexible design method.

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