JPH0544261A - Jointing metal fittings for steel pipe column/beam connection section - Google Patents

Abstract

PURPOSE:To prevent a plate body from being deformed when it is jointed to a steel pipe column, by providing the plate body with a tap screw hole, to project joint pieces to be pectinated on the side of the plate body, and by forming a loose slot to be penetrated with a bolt in the direction orthogonal to the joint pieces. CONSTITUTION:A plate body 7 to be brought in contact with the internal side surface of a steel pipe column 1 is provided with a tap screw hole 11. The hole is provided with a joint surface to the steel pipe column 1 of the plate body 7, and on a surface on the counter side, joint pieces 8 are integrally projected to be pectinated at small intervals. After that, a loose slot 9 to be penetrated with a bolt 10 in the vertical direction orthogonal to the joint pieces 8 is formed, and a jointing metal fittings 6 is composed. Then, the jointing metal fittings 6 is set on the internal side surface of the steel pipe column 1, and a T-type jointing metal fittings 3 is brought in contact with the outer peripheral surface of the steel pipe column 1 and is fastened with a high tensile bolt 14. Besides, the joint pieces 8 of the adjacent jointing metal fittings 6 are alternately fitted on each other to be orthogonal, and the bolts 10 are inserted to be fastened, through the loose slots 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint metal fitting in a joint between a steel pipe column and a steel beam, which is a material having a closed cross section, in the field of civil engineering, construction or bridge.

[0002]

2. Description of the Related Art Joining a joint between a steel pipe column and a steel beam is carried out by means of bolt joining except welding. In such a bolt joint, a plate-shaped metal object with tapped screw holes, etc. is provided inside the steel tube in advance so that the inside of the steel tube column cannot be reached when tightening the bolts, or only the joint part is made of a special metal object. Therefore, various proposals have been made.

The inventors of the present invention previously devised a joining metal piece as shown in FIG. 6 and applied for it as Japanese Patent Application No. 2-113960 (JP-A-3-76948). In the figure, 1 is a steel pipe column, and 2 is a beam made of an H-shaped steel frame. At the ends of the upper and lower flanges 2a of the beam 2, a T-joint metal fitting 3 which is a split tee is attached by welding or bolting. On the other hand, inside the steel pipe pillar 1, a joining metal piece 4 having a substantially equilateral chevron cross-section with a tapped screw hole 11 is provided at a corner portion. Then, the T-shaped joint metal 3 is brought into contact with the outer peripheral surface of the steel pipe pillar 1, and the T-shaped joint metal 3 and the joint metal 4 are clamped with the high-strength tap screw 5 penetrating the steel pipe pillar 1 while sandwiching the steel pipe pillar 1.

In this way, the steel pipe column 1 can be used as it is without cutting, and since welding is unnecessary, not only the processing is facilitated, but also the deterioration of the product accuracy due to the cutting and welding can be prevented. .. Further, the joint metal 4 acts as an out-of-plane bending reinforcing member of the steel pipe column 1, and the joint metal 4
Since the screw hole of is a tap screw, there is no fear of dropping compared to the temporary mounting nut, and it can withstand considerably hard handling.

[0005]

However, in the case of the metal fitting shown in FIG. 6, it is difficult to accurately align the tapped screw hole with the threaded hole of the T-shaped metal fitting, etc. The method of fixing the hardware in advance is also troublesome. Further, since the metal joints at the corners are independent of each other, the reinforcing effect is effectively exhibited only when the inside of the steel pipe column is filled with concrete.

The object of the present invention is to eliminate the disadvantages of the above-mentioned conventional example, and in the joint portion between the steel pipe column and the beam, even if the steel pipe column receives an external force such as an out-of-plane bending stress through the beam, To provide a metal fitting for a steel pipe column / beam joint part capable of reliably preventing deformation, capable of appropriately adjusting the position, easy to dispose in the steel pipe column, and improving accuracy. It is in.

[0007]

In order to achieve the above-mentioned object, the present invention provides a tapped screw hole in a plate body that abuts on the inner surface of a steel pipe column, and also mounts the plate body on the side opposite to the joining surface to the steel pipe column. Is a joint metal piece in which left and right sides of the joint piece are integrally projected at a small interval in the shape of a comb tooth and a loose hole through which a bolt penetrates in the orthogonal direction is formed in the joint piece. Joining metal fittings abutting adjacent inner side surfaces are joined to each other by meshing the joining pieces so that they intersect at right angles, inserting bolts through the loose holes and tightening them to join the inside of the steel pipe pillar / beam joint portion. The gist is to form the interposing frame by connecting a plurality of metal joints.

[0008]

According to the present invention, the adjacent metal fittings are meshed with each other such that the bonding pieces are alternately orthogonal to each other, and the meshing is bolted in the vertical orthogonal direction. 90% or more of the bolt's axial force can be transmitted by friction. Further, since each joining piece is subdivided into a comb tooth-like shape as small as possible, the cross-section axial yield strength of each joining piece is smaller than the frictional force. That is, when a frictional force is applied to each joint piece by a bolt, 100% of its cross-sectional proof strength can be exerted, and it becomes difficult to separate the joint metal pieces from each other as if two books are combined with the pages entwined.

Then, the joining metal parts are connected to each other to form a frame body, and the frame body is disposed inside the steel pipe pillar between the steel pipe pillar / beam joint portion as a backing material and an external force resistance material. Is reinforced from the inside to prevent deformation of the steel pipe column.

[0010]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a cross-sectional plan view showing a state of use of a metal fitting of a steel pipe column / beam connection portion of the present invention, FIG. 2 is a vertical sectional side view of the same, and the same reference numerals as those of FIG. Is attached.

First, the joining metal piece 6 used in the present invention will be described. As shown in FIG. 3, a tap screw hole 11 is provided in a plate body 7 that abuts on the inner side surface of the steel pipe column 1, and this plate body 7 is also provided.
A joint piece 8 is integrally formed on the surface of the opposite side of the steel pipe column 1 opposite to the joint surface at a small interval in the shape of a comb tooth, and the joint piece 8 is loosened by bolts extending in a vertical orthogonal direction. The hole 9 is formed. The joining pieces 8 are provided in two rows on the left and right sides of the plate body 7, respectively.

Further, a joining piece 8 protruding from the surface of the plate body 7
The space between them is such that the joint piece 8 of another joint metal piece 6 can be inserted between them, and the loose hole 9 provided in this joint piece 8 is different from the bolt 10 (high-strength bolt) that penetrates the loose hole 9 as shown in FIG. It may be a loose hole, and may be a notched hole opened at the tip as shown in FIG. 3, or may be a closed oval-shaped elongated hole.

The joint metal 6 is arranged in the steel pipe pillar 1 by abutting the plate body 7 on the inner side surface of the steel pipe pillar 1, and abuts on the adjacent surfaces on the inner side surface of the steel pipe pillar 1. The joining metal pieces 6 are joined to each other by engaging the joining pieces 8 so as to be orthogonal to each other, and inserting the bolts 10 into the loose holes 9 and tightening them. In this manner, the four joining metal pieces 6 are combined to form the frame body 12 in which the joint pieces 8 serve as joints and the plate bodies 7 surround the four sides. It is possible to match the inner diameter of the steel pipe column 1 by adjusting the meshing position of the joining pieces 8 of each other. The frame body 12 is assembled at the factory and used as a backing material in advance of the steel pipe column 1.
Install it inside the.

In this way, the upper and lower flanges 2 of the beam 2 are
The T-shaped joint metal 3 attached to the end a by welding or bolting is brought into contact with the outer peripheral surface of the steel pipe column 1, and the T-shaped joint metal 3
While the steel pipe pillar 1 is sandwiched between and the plate body 7 of the metal fitting 6, the high-strength bolt 14 as a tap screw is used for tightening. The high-strength bolt 14 in this case penetrates the screw hole provided in the steel pipe column 1,
Insert into the tap screw hole 11 of the plate body 7.

The frame 12 is a joining piece 8 for joining the joining metal pieces 6 to each other.
Since they are alternately positioned and meshed with each other, and the meshing is tightened in the orthogonal direction by the bolts 10, each joint piece 8 can transmit 90% or more of the axial force of the bolts 10 by two-sided friction. Since each of the joining pieces 8 is subdivided into a comb tooth shape as small as possible, the cross-sectional axial proof strength of each joining piece 8 is smaller than the frictional force, and when each joining piece 8 is given a frictional force by a bolt, It becomes possible to exert 100% of its cross-sectional proof strength, and 2
It becomes difficult to separate the books by entwining the pages and combining them, and it becomes a rigid frame.

By interposing the rigid frame 12 between the T-shaped joints 3 at the ends of the upper and lower flanges 2a of the beam 2 inside the steel pipe column 1, a virtual inner diaphragm α as shown in FIG. It exerts the same effect as it is applied, and the steel pipe pillar 1 is a beam 2
It can be prevented from being deformed even when receiving an external force from. Further, even when the steel tube column 1 is filled with concrete, the space can be sufficiently secured, and therefore, it can be applied to both the steel frame structure and the steel frame concrete structure.

[0017]

As described above, the metal fitting of the steel pipe column / beam joint portion of the present invention is arranged inside the steel pipe pillar to join with the beam, but a virtual inner diaphragm is formed. Even when the steel pipe column is subjected to the out-of-plane bending stress via the beam, the deformation of the steel pipe column can be reliably prevented.

Moreover, fine adjustment is possible, it can be easily arranged according to the size of the steel pipe column, and the position of the bolt holes can be easily adjusted.

[Brief description of drawings]

FIG. 1 is a cross-sectional plan view of a column / beam joint showing a usage state of a metal joint for a steel pipe column / beam joint of the present invention.

FIG. 2 is a vertical cross-sectional side view of the column / beam joint showing the usage state of the metal joint of the steel pipe column / beam joint of the present invention.

FIG. 3 is a perspective view showing one embodiment of a metal joint for a steel pipe column / beam joint of the present invention.

FIG. 4 is an explanatory view showing the position adjustment of the metal joint of the steel pipe column / beam joint of the present invention.

FIG. 5 is an explanatory diagram showing a virtual diaphragm of the present invention.

FIG. 6 is a cross-sectional plan view of a steel pipe column / beam connection portion showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Steel pipe column 2 ... Beam 2a ... Flange 3 ... T-type metal fitting 4 ... Metal fitting 5 ... Tap screw 6 ... Metal fitting 7 ... Plate 8 ... Joining piece 9 ... Loose hole 10 ... Bolt 11 ... Tap screw hole 12 ... Frame body 14 ... High-strength bolt

Claims (2)

[Claims] 1. A tap screw hole is provided in a plate body that abuts an inner surface of a steel pipe column, and a joining piece is formed in a comb-teeth shape on the side opposite to the joining face of the plate body to the steel pipe column. A joint for metal fittings for steel pipe columns and beam joints, characterized in that the joint piece is integrally projected at small intervals, and a loose hole through which a bolt penetrates in the orthogonal direction is formed in the joint piece. 2. A tap screw hole is provided in a plate body that abuts an inner surface of a steel pipe column, and a joining piece is formed on the left and right sides of the plate body on the side opposite to the joining face to the steel pipe column. Is a metal fitting which is integrally projected at a small interval and has a loose hole through which a bolt penetrates in the orthogonal direction in the joint piece. Engage the pieces so that they intersect at right angles, insert the bolts into the loose holes and tighten them to connect them, and interpose inside the steel tube column between the steel tube column and beam joints. Steel fittings for steel pipe columns and beam joints that are characterized by