COMPOSITE BEAM FOR GIRDER

摘要

A steel-concrete composite girder is provided to have no necessity for the maintenance of a concrete member by excluding formwork and bar arrangement work for concrete such as RC beams or PSC beams for the existing construction and to secure interlayer height or clearance to the maximum by securing sufficient span length against low clearance. Disclosed is a steel-concrete composite girder(100) formed by filling concrete in box-shaped steel and installed on two columns or piers/abutments(600), which contains outer steel provided with an empty space block-outed on the lower part of a girder by forming hollow penetrations(200) connected horizontally on a web of the composite girder and separated by web columns, and inner concrete(130) filled in the outer steel except the hollow penetration and restricted by the outer steel to secure the effective strength of the composite girder. Hereon a wire tube(400) and a duct(500) are installed to penetrate the hollow penetrations not to install any obstacle on the lower part of the composite girder, an inner reinforcement member(300) including a brace or a spacer is inserted to the hollow penetration, and a steel compression plate(140) is buried under the inner concrete and manufactured to have effective section force to resist the compression stress by external force added on the composite girder.