| 摘要 |
<p>The purpose of the present invention is to provide a PSC I type girder which improves economical efficiency by economically optimizing the PSC I type girder so as to determine widths of upper and lower flanges, and determining girder depth to span length in the PSC I type girder so as to reduce the amount of PSC I type girders disposed in each span to 20 to 30%. To this end, the PSC I type girder for a highway bridge according to the present invention is characterized in that the span length of the PSC I type girder is 20.00m to 60.00m, the girder depth of the PSC I type girder is 1ℓ/23 to 1ℓ/18 with respect to the span length, the width of the lower flange is 0.70m to 1.40m, the width of the upper flange is 1.70b1 to 2.30b1 with respect to the width of the lower flange, the disposed interval of the PSC I type girder is 3.20m to 3.80m, an extension part having extended upper and lower surfaces is formed on a central part of the upper flange, and a reinforcing material is provided in the longitudinal direction of the PSC I type girder to the extension part so as to increase a compression resistance of the upper flange and eccentric efficiency of a PS steel wire.</p> |
