earticle

영어

Composite girder is connected using stud connector between the concrete slab and the steel girder. Because of composite effect, the load carrying capacities in positive bending moment and rigidity of composite girder is bigger than those of the steel girder. However, because neutral-axis risen, curvature of the composite girder is smaller than that of the steel girder. This paper analyzed the relation of composite effect and neutral-axis by variation of the steel girders. The conclusions derived from this study are as follows. 1) The load carrying capacities of composite girder in positive bending moment rise from 20% to 80% than those of the steel girder. However, cases that area of the steel girder is over 200m2 can not expected composite effect. 2) When composite effect is over 1.4 times of steel girder, neutral-axis rise to the upper flange. 3) Also, in cases that area of the steel girder is over 200m2, curvature of steel girder is less than that of the steel girder.