JPH0645525Y2 - Joint structure of PC board and steel beam - Google Patents

Description

TECHNICAL FIELD The present invention relates to a joint structure for joining a steel frame beam to a so-called PC plate of a precast concrete plate.

(Prior Art and Problems) In a structure in which a steel frame beam is joined to a PC plate, as shown in the schematic front view of FIG.
The end portions of the lower chord member 22 and the lower chord member 22 are butted to the embedded metal objects 11 'and 12' provided at predetermined locations on the upper side surface and joined by bolts v and v.

Then, a diagonal member (not shown) is arranged between the upper chord member 21 and the lower chord member 22 to form the truss or lattice-shaped steel beam 2.

However, according to this joint structure, the load on the steel beam 2 is supported by the shearing force of the bolts v, v, and as the load on the steel beam 2 increases, the bolts v, v
The effective cross section of becomes large.

Therefore, it is necessary to increase the size of the joining member.

It is also difficult to position and join the upper and lower chord members at the predetermined positions on the PC board.

(Means for Solving the Problem) The present invention was devised to achieve the above-mentioned object, and joins steel beam beams composed of upper and lower chord members and diagonal members to the upper side surface of the PC board. In the above, embedded metal objects having horizontal abutting surfaces are respectively fixed at predetermined upper and lower portions of the upper side portion of the PC plate.

A chord member formed by fixing a joining metal object having a horizontal abutting surface to an end portion is joined to the horizontal abutting surface of the embedded metallic object.

Further, the upper embedded metal piece is arranged with its horizontal contact surface facing upward, the lower embedded metal piece is arranged with its horizontal contact surface facing downward, and the upper chord member is arranged with its horizontal contact surface. And is joined via a bolt in a state of being in contact with an upward horizontal contact surface of the embedded metal object, and the lower chord member has the horizontal contact surface of the welded metal object upward and the embedded metal object It is joined via a bolt in a state of being in contact with the downward horizontal contact surface.

(Example) Hereinafter, the joint structure of the PC board and the steel beam of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a front view showing a state where a steel frame beam 2 is arranged at a predetermined position of a PC plate 1, and FIG. 2 is an enlarged view showing a joined state of upper and lower chord members.

As described above, the steel beam 2 includes the upper chord member 21, the lower chord member 22 and the diagonal member.
It is assembled into a truss or lattice by 23,23.

That is, the upper and lower chord members 21, 22 are joined at their ends to predetermined positions (upper side surface) of the PC board 1.

For this joining, joining metal pieces 24 and 25 are fixed to the upper chord member 21 and the lower chord member 22, respectively.

The joining hardware 24 for joining the upper chord member 21 is the butt face 24.
a is made substantially vertical, and a horizontal contact surface 24b cut substantially horizontally from the abutting surface 24a faces downward, and a vertical cut surface 24c cut vertically is provided.

Similarly, the metal joint 25 for bonding the lower chord member 22 is fixed so as to face the metal joint 24, that is, the horizontal contact surface 25b faces upward as shown in FIG.

On the other hand, a pair of embedded hardware 1 is provided at the required location on the upper side of the PC board 1.
1,12 have been established.

The embedded metal 11 is substantially the same shape as the metal joint 24 and is arranged 180 ° upside down, and similarly has a butt face 11a, an upward horizontal abutting face 11b, and a vertical notch face 11c. .

The embedded metal item 12 is arranged (embedded) at a predetermined position from the embedded metal item 11.

To join the metal fitting 24 and the embedded metal 11, the downward horizontal contact surface 24b is first brought into contact with the horizontal contact surface 11b, and then the abutting surface 24a is brought into contact with the vertical notch surface 11c and the abutting surface 11a.
Are brought into contact with the respective vertical notches 24c.

Then, as shown in FIG. 4, the horizontal contact surface 24b of the metal joint 24 is placed on the horizontal contact surface 11b of the embedded hardware 11,
In such a state, the joint metal piece 24 and the embedded metal piece 11 are clamped by the bolts v, v.

Even when the lower chord member 22 is joined, the embedded hardware 12 is different from the other embedded hardware 11
And the backside (see FIG. 4), the embedded metal fitting 12 is joined from below to the horizontal contact surface of the embedded metal fitting 12 from below.
By contacting the upward horizontal contact surface,
The embedded metal article 12 is joined in the same manner as described above.

Therefore, if the horizontal contact surface 11b of the embedded metal object 11 and the horizontal contact surface of the embedded metal object 12 have a certain distance, it is not easy to perform the alignment, and the upper chord member 21 and the lower chord member 22 are always at the same height. It will be arranged in (beam back).

As described above, according to the joint structure of the present invention, the load received from the steel beam 2 is transmitted through the horizontal contact surfaces of the joint metal and the embedded metal, so that the bolts v, v only receive tension. .

Further, the steel beam itself is also formed in a predetermined size and shape.

(Effect) The joining structure having the above-described configuration does not increase the size of the joining metal and the embedded metal, and can obtain sufficient joining strength even if the effective cross section of the bolt is smaller than before, and is also advantageous in terms of construction accuracy. It becomes a junction structure.

[Brief description of drawings]

FIG. 1 is a front view for explaining a state in which a steel frame beam is assembled on a PC board, FIG. 2 is an enlarged view showing a joined state of upper and lower chord members, and FIG. 3 is for explaining a joined state of upper chord members. FIG. 4 is an enlarged view of an essential part showing the same joined state, and FIG. 5 is a schematic front view showing the joined state of the prior art. 1 ... PC board, 11 ... Embedded metal object, 11a ... Butt surface, 11b ... Horizontal contact surface, 11c ... Vertical notch surface, 12 ... Embedded metal object, 2 ... Steel beam, 21 ... Upper chord material, 22 ... Lower chord material, 23, 23… diagonal members, 24… joining metal object, 24a… butt surface, 24b… horizontal contact surface, 24c… vertical notch surface 25… joining metal object, v, v… bolts.

Claims (1)

[Scope of utility model registration request] 1. A method for joining a steel frame beam composed of upper and lower chord members and diagonal members to an upper side surface of a PC plate, wherein an embedded horizontal contact surface is provided at a predetermined upper and lower position of an upper side portion of the PC plate. Each of the metal fittings is fixed, and a chord member formed by fixing a metal fitting having a horizontal contact surface to an end of the embedded metal material is joined to the horizontal contact surface of the embedded metal material. The insert has its horizontal contact surface facing upwards,
The lower embedded metal piece is arranged with its horizontal contact surface facing downward, and the upper chord member has its horizontal contact surface facing downward and contacts the upward horizontal contact surface of the embedded metal material. The lower chord member is joined via a bolt in a state where the horizontal contact surface of the metal fitting is directed upward and the lower metal member is in contact with the downward horizontal contact surface of the embedded metal material. A joint structure of PC board and steel beam, which is characterized by