Prestressed composite girder, continuous prestressed composite girder structure and methods of fabricating and connecting the same

Abstract

Disclosed herein are a prestressed composite girder with steel plates, a continuous prestressed composite girder structure with steel plates and methods of fabricating and connecting the same. The prestressed composite girder includes shear reinforcing bars and main reinforcing bars, sheaths, sole plates, and steel plates. The shear reinforcing bars and main reinforcing bars are arranged across the prestressed composite girder. The sheaths are adapted to contain steel wires arranged across the prestressed composite girder. The sole plates are placed at ends of the prestressed composite girder and provided with shear connecting members. The steel plates are placed in upper and lower flanges of the prestressed composite girder and provided with shear connecting members.

Description

TECHNICAL FIELD [0001] The present invention relates to a prestressed composite girder with steel plates, a continuous prestressed composite girder structure with steel plates and methods of fabricating and connecting the same. BACKGROUND ART [0002] For prior art, there are a prestressed composite girder formed of concrete without steel plates, and a continuous prestressed composite girder structure formed by simply using bolts. [0003]FIGS. 1A and 1B are front and side sectional views showing a conventional prestressed composite girder 10 that is widely used. [0004]FIG. 1A is a front sectional view of the conventional prestressed composite girder 10. Referring to FIG. 1A, a concrete structure 10 includes shear reinforcing bars and main reinforcing bars 20, horizontal shear reinforcing bars 30 combining an upper floor slab with the conventional prestressed composite girder, and sheaths 40 including steel wires to introduce a compressive force to the lower end of the tensile side of t...

AI Technical Summary

Benefits of technology

[0007] Accordingly, it is an object of the present invention to provide a prestressed composite girder, a continuous prestressed composite girder structure and methods of fabricating and connecting the same, in which steel plates are embedded in the upper and lower flanges of the prestressed composite girder, so that the rigidity thereof is increased, thus reducing the clearance thereof and, thus, achieving a compact and economical construction.

Problems solved by technology

However, the conventional prestressed composite girder is formed of only concrete, so that the rigidity thereof is low compared to a steel structure formed of a steel and, thus, the clearance thereof must be greater.

Accordingly, the conventional prestressed composite girder is disadvantageous in that the appearance thereof looks crude and it can not be applied to the a bridge across river, which requires a sufficient overhead clearance.

Furthermore, the horizontal reinforcing bars functioning to combine an upper floor slab with the conventional prestressed composite girder must be removed from a completed structure, so that the conventional prestressed composite girder is uneconomical in that reinforcing bars more that those required for the conventional prestressed composite girder itself are arranged in the conventional prestressed composite girder.

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