| 摘要 |
<P>PROBLEM TO BE SOLVED: To expand the application field of a floor slab using a shape steel by extending the length of the floor slab using a conventional angular steel pipe over its limit length. <P>SOLUTION: The shaped steels are arranged in parallel by bringing them in contact with each other with each, and the contacting portions are rigidly joined and integrated by welding. A joint member 2 of a steel plate is arranged and welded at right angles to the shaped steel at a constant interval, as necessary, causing the shape steels to be rigidly integrated. A tendon 3 is arranged at a position deviated only by e on the lower side of the neutral axis on the cross section of the shaped steel in the axial direction in the inside space between the shaped steels. Thus, the tension strength introduced into the tendon 3 produces upward-direction camber in the floor slab 1, causing the floor slab to be prestressed. <P>COPYRIGHT: (C)2011,JPO&INPIT |
