| 摘要 |
PROBLEM TO BE SOLVED: To provide a floor slab structure which enables a slab having a top surface with a step to restrain vibrations generated by a heavyweight floor impact sound, without decreasing construction efficiency. SOLUTION: This floor slab structure has a floor slab in which post-cast concrete is placed above a plate-like lightweight member 3 partially placed on a half PCa floor member 2 so that a rising section 4 can be formed integrally with the half PCa floor member 2. A strip-shaped edge material 7, which has rigidity higher than that of the slab 1, which is rigidly joined to the slab 1 and both the ends of which are rigidly joined to a structural member for supporting the slab 1, is formed with a predetermined width along an edge 4a of the rising section 4. A distance from the strip-shaped edge material 7 to the structural member for supporting the slab 1 is set as long as/shorter than the wavelength of a bending wave at predetermined impact frequencies, which is transmitted to the slab in a bending wave restraining area 5 enclosed with the strip-shaped edge material 7 and the structural member. COPYRIGHT: (C)2009,JPO&INPIT
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