DOWEL DEVICE FOR JOINING CONCRETE MEMBER TO STEEL MEMBER, COMBINED FLOOR SLAB HAVING THE DOWEL DEVICE, AND STEEL-CONCRETE STRUCTURE

摘要

PROBLEM TO BE SOLVED: To make sure an effect of preventing a concrete layer from displacement. SOLUTION: A circular-tube-shaped member 11 is attached into a hole 4 of a rib 3 provided on the surface of a bottom steel plate 1 in close contact with an inner circumference, and both ends in the axial direction of the member 11 are positioned to protrude to both sides of the rib 3. Concrete is placed over the surface of the bottom steel plate 1 to fill the circular-tube-shaped member 11 with the concrete so as to form a local stress concentration alleviating member 10 comprising the circular-tube-shaped member 11 and the filled concrete 12. Thus, a combined floor slab Ia is constituted by forming a dowel device having the rib 3 and the local stress concentration alleviating member 10 attached in the hole 4 of the rib 3 and simultaneously forming a concrete layer 6 in which the dowel device is embedded. A load acting on the local stress alleviating member 10 from the inner circumference of the hole 4 of the rib 3 is diffused to the axial direction and transmitted to the concrete layer 6 after the load is diffused to a projection area to a plane in parallel with the axis of the member 10. Thus, a risk of damage caused by a stress concentration is controlled. COPYRIGHT: (C)2010,JPO&INPIT