| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a concrete floor slab structure using an inexpensive pre-cast composite beam which can greatly reduce weight while satisfying required strength, and which is composed of a T-shaped or box-shaped steel beam and a single concrete beam. Ž<P>SOLUTION: The concrete floor slab structure, wherein a T-shaped or box-shaped steel beam 1 having the web 3 integrally raised from a top surface of a seating plate 5 and long in the direction of erection is used, is provided with a single concrete beam 2 extending in parallel with the steel beam 1 at the upper end 4 of the web of the steel beam 1. Also, the upper end 4 of the web is embedded in the single concrete beam 2 and a reinforcing bar 6 is inserted through the upper end 4 of the web and embedded in the single concrete beam 2 while both ends of the reinforcing bar 6 are projected from both side faces of the concrete beam 2 for forming a left- and a right-joints 9. The seating plate 5 of the steel beam 1 is supported in parallel at intervals on a bridge pier or a beam-receiver of a building and the joint 9 is projected into the interval while cast-in-place concrete 12 is placed into the interval, so as to embed the joint 9 in the cast-in-place concrete 12. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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