bridge structure combined steel plate deck with preflex girder

摘要

The present invention relates to a steel deck plate and preplex girder hybrid bridge structure. More specifically, the deck plate is used to form a lower flange concrete, which has a low self-weight and is advantageous in flexural and torsional stiffness by transverse ribs and longitudinal ribs, and the pre-stressed lower flange concrete is pre-introduced in the lower part of the I-shaped cross section. By reducing the cost of steel and supporting the tensile force required, it is possible to build longer bridges, and in particular, the advantages of the preflex girder system, which is particularly advantageous when the height of the bridge is limited, are economical. It is very easy to install and construction, and further relates to a composite bridge structure that can reduce the number of installation of the bridge girder, the steel floor plate 100 installed between the shift 400 and between the bridge and the pier 500; A preflex girder 200 installed in the longitudinal direction (longitudinal direction) of the steel bottom plate at a predetermined interval on the bottom surface of the steel bottom plate 100; And a plurality of transverse beams 300 and 340 formed in a longitudinal direction and a right angle (lateral direction) of the steel bottom plate at predetermined intervals between the preplex girder 200, and in the abdomen and haunch of the preflex girder 200 It is characterized in that the concrete is not covered.