Inverted trapezoid box rounded using what was a ready-made steel pipe in silos in the lower flange section steel deck girder bridge

摘要

(57) Abstract Objective Below being roundness, the converse trapezoid box profile steel which had the flangeAs for the floor system column bridge, the wind blowing from cross direction, the Kalman eddyBecause is difficult to be generated, with eddy oscillation fear of the bridge collapseIt is. In addition, when the web size which several holes was opened is usedBecause the ventilation becomes good, it becomes profitable vis-a-vis wind blast.In addition, because it is box profile, the translot being unnecessary, twist rigidity largeIt is to come. Constitution The established metal tubing in several splits the circle which it fetches verticalThe board which had at looking is designated as lower flange 1, the steel where vertical rib 3 is attachedTo designate deck plate 2 as the upper flange, 2 Maki''s gradient steel sheetThe converse trapezoid box profile which had the roundness which forms 4 as web sizeIt is the steel floor system column bridge which is made the main spar. As for board thickness of 1 approximately 25mm,As for board thickness of 2 approximately 10mm, as for board thickness of 4 approximately 9mm, interval of 3As for the metal tubing which approximately it makes 25mm, uses for 1 with established ones, the soMajor diameter makes approximately 2000mm. Furthermore, in web size 4,There are also times when the board which opened several holes is used.