| 摘要 |
PROBLEM TO BE SOLVED: To provide a steel-concrete composite floor slab, its execution method, a constitutive member of the synthetic floor slab, and a bridge using the composite floor slab for securing rigidity when casting concrete in place on a steel plate, and reducing weight of a steel material. SOLUTION: A part of the concrete placed on the steel plate 5 is precedently placed to form a concrete beam 11 having this precedently placed concrete 10, a part of reinforcements 6 and 7, and a part of the steel plate 5, and this concrete beam 11 is provided as a steel plate reinforcing material for holding a dead load before synthesis. Or an installing time reinforcement is arranged in a position lower than a reinforcement (a main reinforcement and a distribution bar) above the steel plate, and a part of the concrete placed on the steel plate is precedently placed up to the vicinity of a position of the installing time reinforcement to form the concrete beam having this precedently placed concrete, the installing time reinforcement, and a part of the steel plate, and having the height lower than the thickness of the composite floor slab after completion.
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