| 摘要 |
PROBLEM TO BE SOLVED: To provide a concrete structure which has grid-shaped bar arrangements arranged therein in multiple stages, and can prevent the generation and expansion of cracks therein without drastically increasing the number of bars. SOLUTION: The concrete structure W1 is provided with a dense bar arrangement section 1 having a grid-shaped bar arrangement 10 which is set up by combining first horizontal bars 1a and first vertical bars 1b, and a coarse bar arrangement section 2 having a grid-shaped bar arrangement 20 which is set up by combining second horizontal bars 2a and second vertical bars 2b. A bar arrangement interval d<SB>1a</SB>between the first horizontal bars 1a is set narrower than a bar arrangement interval d<SB>2a</SB>of the second horizontal bars 2a, and the first horizontal bars 1a is made shorter in diameter than the second horizontal bars 2a. COPYRIGHT: (C)2009,JPO&INPIT
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