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タイトル別名
  • An Experimental Study of Composite Beams without Shear Connectors in the Negatine Bending Region
  • フ ノ マゲ オ ウケル ダンゾク ゴウセイケタ ノ イチジッケン

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抄録

Composite girders are used extensively as highway bridges and the most of them are simple span girders. Although continuous　composite girders are more economical, give better driving conditions, and have greater capacity than simple span girders, they have not been used much because of complicate construction where prestressing is involved in negative moment regions. The alternative method results in continuous composite girders with normal reinforcement in concrete slab in the region of negative bending. Composite girders with no shear connectors in the negative moment region have been specified in AASHO Specification. Such composite girders are commonly practiced in the United States, although the area of reinforcing bars in the slab is neglected in the analysis. The present paper describes the test results of composite beams with shear connectors at the beam ends, which are subjected to negative bending. The test results show that the reinforcement is effective to tension stress produced in the concrete slab and that the ultimate moment of the beams tested are higher the theoretical ultimate moment. However, composite beams with shear connectors at the beam ends are more flexible than normal composite beams.

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