JPH057804U - Weldite steel panel zone reinforcement structure - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a panel zone reinforcement structure of welded steel with improved workability and high structural reliability. [Structure] A receiving plate 2 is previously welded to a panel zone of the upper and lower flanges 1 of a steel frame girder B to be joined to an SRC column A, and both end screw portions of a reinforcing bar 3 are inserted into the upper and lower receiving plate 2 and a nut 4 is screwed. I'm wearing tight.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a reinforcing structure in a panel zone of a welded steel frame (a steel frame welded at a site joint).

[0002]

[Prior Art]

 3 and 4 show the panel zones of the SRC column A and the steel frame girder B, which have a large member size and adopt the Welsite method, and the flange a of the girder B is joined to the steel frame of the column A by in-situ welding. The web b of the girder B is joined via a gusset plate c and a high-strength bolt d.

In this case, the girder plate c for high beam connection and the high-strength bolt d occupy the same position as the hoop reinforcement e of the concrete reinforcement portion of the column, and they interfere with each other, and the hoop reinforcement e is formed by the high-strength bolt portion. Can not be welded. In addition, in the figure, f is the main pillar. For this reason, as shown in FIG. 5 and FIG. 6 as well as FIG. 7, the split hoop reinforcement e ′ is used as the hoop reinforcement e of the panel zone, and the reinforcement reinforcement g is arranged between the upper and lower flanges a of the girder B. A method has been proposed in which the upper and lower bent ends g ₁ and g ₂ of the reinforcing bar g are welded to the upper and lower flanges a of the girder B.

[0004]

[Problems to be solved by the device]

 In this case, by using the hoop reinforcement of the SRC column as the split hoop reinforcement, the interference between the hoop reinforcement and the steel frame can be avoided, but a problem occurs in the reinforcement of the shear reinforcement of the panel zone. That is, since the upper and lower end portions of the large-diameter reinforcing bar that constitutes the shear reinforcing bar g are bent, the compatibility with the large beam is poor, a gap occurs, good welding cannot be performed, and welding time is long. There is.

The present invention has been proposed in view of the above problems of the prior art, and an object of the present invention is to improve the workability and the structural reliability of the panel zone reinforcement of the Welsite steel frame. The point is to provide the structure.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the panel zone reinforcing structure of the welded steel according to the present invention comprises a panel plate of the column beam on a receiving plate pre-welded to the upper and lower flanges of the steel beam to be joined to the SRC column. It is constructed by inserting both ends of the shear-reinforced reinforcing bars and screwing and tightening nuts.

[0007]

[Action]

 According to the present invention, as described above, the supporting plates are welded to the upper and lower flanges of the steel beam to be joined to the SRC column in advance at a factory, and the shear reinforcing bars of the panel zones are screwed at both ends. After the main fastening of the steel frame and the steel beam of the SRC column is completed, the threaded portions at both ends of the reinforcing bar are inserted into the receiving plates previously welded to the upper and lower flange portions of the steel beam, and the nut is screwed. By tightening and tightening, the shear reinforcement of the panel zone can be installed easily and securely.

[0008]

【Example】

 1 and 2 show an embodiment of the present invention, in which A is an SRC column, B is a steel frame girder, and a receiving plate 2 is pre-welded to the upper and lower flanges 1 located in the panel zone of the girder B in a factory or the like. ing. Then, the flange portion of the steel frame girder B is welded to the flange of the column A, the web part of the girder B is fastened to the gusset plate of the column A with high-strength bolts, and after the main tightening, the shear reinforcing bar 3 The threaded portions at both ends are inserted into the receiving plates 2 and the nuts 4 are screwed and tightened to arrange the shear reinforcing bar in the panel zone of the column beam.

In the figure, 5 is a main columnar bar, and 6 is a columnar bar.

[0010]

[Effect of the device]

 According to the present invention, as described above, the shear plate reinforcing bars of the panel zone, in which the receiving plates are previously welded to the upper and lower flanges of the steel frame beam and the both ends are threaded, are used. By inserting the nuts into each receiving plate and screwing and tightening the nuts, the conventional bending work was not required to attach the shear reinforcement bars in the panel zone, and blacksmithing was unnecessary, so that the panel zone Reinforcing bar installation becomes easier, the process is reduced, and the construction period is shortened.

Further, since the receiving plate is factory welded, the quality is improved, the construction is surely performed, and the structural reliability is improved.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of a panel zone reinforcement structure of a welded steel frame according to the present invention.

2 is a cross-sectional plan view of FIG.

FIG. 3 is a vertical sectional view showing an example of a conventional structure.

4 is a cross-sectional plan view of FIG.

FIG. 5 is a vertical cross-sectional view showing another example of the conventional structure.

6 is a cross-sectional plan view of FIG.

FIG. 7 is a perspective view showing details of a shear reinforcement reinforcing bar attachment portion of the panel zone in FIG. 6;

[Explanation of symbols]

 A SRC column B Steel girder 1 Upper and lower flanges of steel girder 2 Support plate 3 Shear reinforcement of panel zone 4 Nuts

Claims (1)

[Claims for utility model registration] [Claim 1] A threaded portion at both ends of a shear reinforcing bar in the panel zone of the column beam is inserted into a receiving plate previously welded to the upper and lower flanges of the steel beam joined to the SRC column. In addition, the panel zone reinforcement structure of the welded steel frame is characterized in that the nut is screwed and tightened.