Steel beams with floor slabs and their design methods

摘要

PROBLEM TO BE SOLVED: To secure a sufficient deformation ability by restraining an out-of-structure deformation of an upper flange of a steel beam due to lateral buckling even in a place where the floor slab is located at a high position with respect to the steel beam. And its design method. A steel beam 1 with a floor slab according to the present invention is a steel beam 1 with a floor slab having an H-shaped cross-section steel beam 9 and a concrete floor slab 11 joined to the upper part of the steel beam 9. , The lower equation (1) is performed while being joined over the entire length of the upper flange 7 of the steel beam 9 so as to have the flange portion 13 and the flange portion 13 is arranged above the upper flange 7 of the steel beam 9. It has a steel member 17 to be filled, and the concrete floor slab 11 is joined via a headed stud 19 arranged on a flange portion 13 of the steel member 17. TJ ≧ 0.035 × bJf ・ ・ ・ (1) Here, TJ: Torsion constant of steel member bJf: Torsion constant of upper flange of steel beam [Selection diagram] Fig. 1