JP2757053B2 - Steel structures and columns - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a connection portion of a steel structure, and more particularly, to a connection portion formed by integrally forming iron having a hole in a longitudinal direction of a steel column. The present invention relates to a steel structure using a steel column constituted by the above.

2. Description of the Related Art For example, the following is a conventional connection part of a steel structure.

In a steel structure in which the H-shaped steel beam 2 is attached to the rectangular steel pipe column 1 to form the connection part 3, as shown in FIGS. 10 to 13, the H-shaped steel beam 2 of the connection part 3 is used. Upper and lower flanges 2a, 2b
A thin steel plate, that is, a diaphragm 4 is connected to the inner space 1A of the rectangular steel tube column 1 corresponding to the above. The diaphragm 4 is provided at right angles to the longitudinal direction of the column 1,
When the H-shaped steel beam 2 is fixed to the rectangular steel tubular column 1 by welding and the H-shaped steel beam 2 is fixed to the inner peripheral wall of the H-shaped steel beam column, a step is required. is there.

FIGS. 10 and 11 show a square steel tube column 1 above the connection 3 and a square steel tube column 1 below the connection 3.
Is made of a square steel pipe having the same length on one side,
12 and 13 show the case where the square steel pipe column 1 above the connection portion 3 has a rectangular shape lower than the connection portion 3. It is composed of a rectangular steel pipe having a shorter side than the steel pipe column 1, and the thickness of the connection part 3 of the rectangular steel pipe column changes, and the square steel pipe column of the connection part 3 has a truncated pyramid shape. is there.

Problems to be Solved by the Invention In the connection part 3 of the conventional steel structure, the diaphragm 4 is provided at the fixing position of each flange 2a, 2b of each H-shaped steel beam 2 of the square steel tubular column 1 of the connection part 3, respectively. Need to be fixed,
In the case where a step occurs at the fixing position of the H-shaped steel beam 2 with respect to the rectangular steel pipe column 1 of the connection part 3, as shown in FIG. 10 to FIG. Diaphragm 4
It is necessary to fix the two diaphragms 4 in the rectangular steel pipe column of the connection part 3 even when there is no step in the fixing position of the H-shaped steel beam 2 with respect to the rectangular steel pipe column 1.

The operation of welding the diaphragm 4 to the inner peripheral wall of the square steel pipe column of the connection part 3 by welding at right angles to the longitudinal direction of the steel pipe column requires skill and labor, and the work is required as the number of diaphragms increases. In addition, material waste increases, and manufacturing costs increase. Further, in the case of a square steel pipe column having a variable thickness in the connection portion 3 as shown in FIGS. 12 and 13, the square steel tube column in the connection portion needs to be formed in a truncated pyramid shape. To form a truncated pyramid-shaped rectangular steel tubular column having a plurality of diaphragms requires a lot of time and a high degree of skill.

The problem to be solved by the present invention is to provide a steel structure and a steel column which do not have the above-mentioned disadvantages, in other words, a steel structure and a steel column which are simple in structure, easy to manufacture and can be supplied at low cost. To provide.

Means for Solving the Problems The present invention provides, as means for solving the above problems,
The following configuration is adopted.

According to the configuration of the present invention, in a steel structure formed by connecting a steel beam to a steel column, a steel column portion of a connection portion serving as a connection portion between the steel column and the steel beam is integrally formed of iron. The bottom and upper surfaces of the connection pillar are formed in a shape substantially matching the outer shape in plan view of the column steel frame coupled to the upper and lower surfaces, and the height of the connection pillar is increased. At least the length of the mounting portion of the steel beam, and a longitudinal hole is formed in the connection column; an upper end of a lower steel column is coupled to a lower surface of the connection column; There is a steel structure in which a lower end of an upper steel column is connected to an upper surface of the column, and a steel beam is connected to a side portion of the connection column.

The said connection pillar is comprised as follows in a suitable embodiment.

(B) When the square steel pipe column above the connection part and the square steel pipe column below the connection part are made of square steel pipes of the same size, the connection column body is formed into a short prismatic shape. The lower surface and the upper surface of the connection column are formed in a shape substantially matching the outer shape of the square steel pipe, the height thereof is set to at least the length of the mounting portion of the steel beam, and a longitudinal hole is formed in the connection column. Is done.

(B) When the rectangular steel pipe column above the connection is smaller than the rectangular steel pipe column below the connection, the connection column is formed in a truncated pyramid shape, and the lower surface of the connection column is located at the bottom. The shape of the rectangular steel pipe column is substantially coincident with the external shape in plan view, and the upper surface of the connection column is approximately in conformity with the external shape of the upper rectangular steel column in plan view, and the height of the port column is at least. The length of the attachment portion of the steel beam is set, and a longitudinal hole is formed in the connection pillar.

(C) Above the connection And below the connection In the case of comprising, the connection pillar is formed in a short prismatic shape, and the lower surface and the upper surface of the connection pillar are The flange has a shape substantially matching the outer shape of a quadrangular prism in plan view surrounded by an extended surface of the outer surface of each flange, and the height of the connection column is at least the length of the mounting portion of the beam. A longitudinal hole is formed in the column.

(D) Above the connection Is below the connection If it is thinner, the connection pillar is formed in a truncated pyramid shape, and the lower surface of the connection pillar is The outer shape of each flange is substantially the same shape as a quadrangular prism in plan view surrounded by an extended surface of the outer surface of The shape of the square pillar is substantially the same as the external shape of the square view surrounded by the extension of the outer surface of each of the flanges, and the height of the pillar is at least as long as the mounting portion of the beam. A longitudinal hole is formed in the hole.

In the case of (c), the shapes of the lower surface and the upper surface of the connection pillar body are each The shape may be a short prismatic shape substantially matching the octagonal shape in plan view surrounded by each flange surface in the longitudinal direction and the surface including the edge of each flange. In the case of the above (d), the shape of the lower surface of the connection pillar body is The shape of the upper surface of the connection pillar is substantially the same as the shape of the octagonal prism in plan view surrounded by each flange surface in the longitudinal direction and a surface including the edge of each flange. The shape may be a truncated octagonal pyramid substantially matching the external shape of the octagonal prism in plan view surrounded by the respective flange surfaces in the longitudinal direction and the surface including the edge of each flange.

A hole in the longitudinal direction of the steel column is formed in the connection pillar, and the cross-sectional shape of the hole is usually selected from a circle, a square, and an octagon, but may be another shape. In the preferred embodiment, the hole of the connection pillar is a through hole, but need not be a through hole. The through-hole facilitates the filling of concrete into the steel column and allows the column to pass through. In the specification of the present application, “a joint column integrally formed of iron” includes (i) a joint column cast by injecting molten iron into a mold such as a sand mold, and (ii) a molten cast iron in a rotating mold. , And (iii) a heated structural steel material forged using a molding die, and (iv) a structural steel material in a short prismatic or truncated pyramid shape. , And a connection pillar formed by making a hole therethrough.

Embodiment 1 A first embodiment is shown in FIGS.
This is an example of using a square steel tube column as 10.

The steel column 10 consists of a lower rectangular steel column 11 and an upper rectangular steel column.
12 is composed of square steel pipes of the same size,
The upper end 11a is connected to the bottom surface 13a of the connection column 13 by welding, and the lower end 12a of the rectangular steel pipe column 12 is connected to the upper surface 13b of the rectangular connection column 13 by welding.

The connection column 13 is formed in a shape corresponding to the outer shape of each of the square steel tube columns 11 and 12, and the height h is slightly smaller than the length h 'of the mounting portion of the H-shaped steel beams 14, 15, 16 and 17. Large length h, pillar 1
A hole 13c having a diameter d is formed in the longitudinal direction of 1 and 12.

The connection column body 13 is formed, for example, by processing a structural steel material, so that the lower surface and the upper surface have two parallel sides having a length m and a length n.
Is formed into a prism having two parallel sides and a height h. A hole 13c having a diameter d is formed by drilling at the center of the prism in the longitudinal direction.

Two adjacent surfaces 13 of the connection column 13 of the steel column 10
The same H-shaped steel beams 14 and 15 are connected to the same height portions of the steel column 10 by welding at e and 13f. In addition, the two surfaces 13j and 13k adjacent to each other of the connection column 13 of the steel column 10 have the H
H-shaped steel beams 16, 17 of the same construction are welded to portions of the same height, which are slightly higher than the joining positions of the shaped steel beams 14, 15. Then, the connection portion of the steel structure is completed.

Note that the thickness t of the thin portion of the connection column 13 is larger than the thickness of the flanges or webs of the H-shaped steel beams 14, 15, 16, 17 attached thereto, for example.

A second embodiment is shown in FIGS.
20 is an example of connecting square steel pipe columns of different thickness.

The steel column 10 uses a rectangular steel tube having a longer side than the upper rectangular steel tube column 22 as the lower rectangular steel tube column 21, and the upper end 21 a of the rectangular steel tube column 21 has a lower surface 23 a of a frustum-shaped frustum-shaped connection column 23. And the lower end 22a of the square steel tubular column 22 is connected to the connection column 2
3 is formed by welding to the upper surface 23b.

The length of each side of the lower surface 23a of the connection column body 23 is substantially equal to the length of each side of the upper end of the rectangular steel tube column 21, and the upper surface 23b
The length of each side of is approximately equal to the length of each side of the lower end of the square steel tubular column 22, and the height is a truncated pyramid, which is slightly larger than the length of the mounting portion of the steel beams 14, 15, 16. Top surface 23b
Hole 13c whose diameter gradually increases from
Are formed in the longitudinal direction. The connection column 23 is cast, for example, by injecting molten cast iron into a sand mold.

Two inclined surfaces adjacent to each other of the connection block 23 of the steel column 20
At 23f and 13k, the ends of the H-shaped steel beams 14 and 15 of the same construction, which are inclined to the inclined surfaces 23f and 23k, are joined by welding to the same height of the steel column 20. In addition, the connection column of the steel column 20
The end of the H-shaped steel beam 16 inclined to the inclined surface 23j is welded to the 23 inclined surface 23j at a position slightly higher than the position where the H-shaped steel beams 14 and 15 are joined. Then, the connection portion of the steel structure is completed.

The third embodiment is shown in FIGS.
Of the same thickness as 30 Here is an example of using

The portion reinforced by the rib plate 31A of 1a is joined to the lower surface 33a of the connection pillar 33 by welding, The portion of the lower end 32a reinforced by the rib plate 32A is joined to the upper surface 33b of the connection pillar 33 by welding.

The connection pillar 33 has a lower surface and an upper surface The flanges 31f, 32f have a shape substantially matching the external shape of a square prism surrounded by an extended surface of the outer surface of each of the flanges 31f, 32f, and the height thereof is set to the length of the mounting portion of the steel beams 14, 15, 16, 17 The column 30 is slightly larger than the column 30 and has a short prismatic shape having a through hole 33c in the longitudinal direction of the column 30.

The connection column body 33 is formed by, for example, injecting molten cast iron into the mold while centrifugally casting a mold having the prism-shaped voids while rotating the mold around the central axis of the prism. .

Similarly to the first embodiment, the H-shaped steel beams 14, 15 and the H-shaped steel beams 16, 17 are connected to the connection column 33 of the steel column 30 by welding.
Complete the connection of the steel structure.

Instead of the connection column 33, the shape of the lower surface and the upper surface 43b as shown in FIG. The outer surface of each flange 32f in the longitudinal direction and each flange 3
It is also possible to use a prismatic connection pillar 43 having a shape substantially matching the octagonal prism shape in plan view surrounded by the plane including the edge of 2f.

When reinforcing steel is arranged on a part or all of the periphery of the steel structure to make a steel reinforced concrete structure, the connection column 33
Desired portion, for example, as shown in FIG.
A through hole 33i in the longitudinal direction of the pillar is formed near the four corners of 33,
The through-hole 33i may be made to pass through the main column, or a desired portion of the connection column 13, 23, 33, for example, the arrangement of the main beam near the attachment portion of the steel beam of the connection column. A through hole may be formed in a portion corresponding to the portion at right angles to the longitudinal direction of the connection pillar (that is, the longitudinal direction of the steel column), and the main beam of the beam may pass through the through hole.

In addition, if the connection pillars 13, 23, 33, 43 of various dimensions are integrally formed by casting, centrifugal casting, forging, and machining, then a large number of cut steel plates are joined together by welding. As a result, there is no need to manufacture steel columns for the connection.

Advantageous Effects of the Invention The steel structure of the present invention is characterized in that a steel column part of a connection part serving as a joint between a steel column and a steel beam is formed of a connection column body integrally formed of iron, The shape of the bottom surface and the top surface of the body is made to substantially match the outer shape in plan view of the column steel frame coupled to the top surface and the bottom surface, the length of the connection column is at least the length of the mounting portion of the steel beam, and A longitudinal hole is formed in the connection column, a lower steel upper end is connected to a lower surface of the connection column, and a lower end of an upper steel column is connected to an upper surface of the connection column, Because the steel beam is connected to the side of the connection pillar, the connection that constitutes the steel column part of the connection,
It can be easily mass-produced by casting, centrifugal casting, forging, and machining. Many of the drawbacks of the prior art, in which a square steel pipe column at a connection is formed by welding a plurality of diaphragms inside a square steel pipe. This eliminates the need for labor and skill, and has the effect of supplying the steel structure at low cost.

[Brief description of the drawings]

1 to 3 show a first embodiment. FIG. 1 is a front view of a connection portion of a steel structure, and FIG. 2 is a cross section of FIG. 1 taken along the line II. FIG. 3 is a plan view, FIG. 3 is a perspective view of a connecting column, FIGS. 4 to 6 show a second embodiment, FIG. 4 is a front view of a connecting portion of a steel structure, and FIG. FIG. 4 is a plan view of FIG. 4 taken along the line II-II, FIG. 6 is a perspective view of a connecting column, FIGS. 7 and 8 show a third embodiment, and FIG. 8 is a front view of a connection portion of a steel structure, FIG. 8 is a plan view of FIG. 7 taken along the line III-III, and FIG. 9 is a line similar to the line III-III of FIG. It is a top view which shows the structure of another connection pillar body etc. which were cross sectioned. FIGS. 10 and 12 are front views of a conventional steel frame structure, and FIGS. 11 and 13 are views taken along lines IV-IV of FIGS. 10 and 12.
It is the top view cut | disconnected by the line. In the figures, 10, 20, and 30 are steel columns, 11, 21, and 31 are lower rectangular steel columns, 12, 22, and 32 are upper rectangular steel columns, 1
3, 23, 33 and 43 are connection pillars, 13c, 23c and 33c are connection pillar holes, 14, 15, 16 and 17 are H-shaped steel beams, and 31 is a lower part. 32 is above 33i is a through hole.

Claims (8)

(57) [Claims] In a steel structure formed by connecting a steel beam to a steel column, a portion of the steel column of a connection portion serving as a connecting portion between the steel column and the steel beam is integrally formed of iron. The shape of the lower surface and the upper surface of the connection pillar is substantially identical to the outer shape in plan view of the pillar steel frame coupled to the upper surface and the lower surface, and the height of the connection pillar is at least. A length of a mounting portion of the steel beam is formed, and a longitudinal hole is formed in the connection column; an upper end of a lower steel column is coupled to a lower surface of the connection column; A steel structure, wherein a lower end of an upper steel column is connected to an upper surface of a body, and a steel beam is connected to a side portion of a connection column. 2. A steel column connected to a lower surface of a connection column formed integrally with iron and a steel column connected to an upper surface of the connection column are formed of rectangular steel tube columns. Item 3. The steel structure according to Item 1. 3. A steel column connected to a lower surface of a connection column formed integrally with iron and a steel column connected to an upper surface of the connection column. The steel structure according to claim 1, wherein: 4. A steel column part of a connection part which is a connecting part between a steel column and a steel beam is constituted by a connection column body integrally formed of iron, and a lower surface and an upper surface of the connection column body are formed. The shape of the column is substantially coincident with the outer shape of the column steel frame connected to the upper surface and the lower surface thereof in plan view, the height of the connection column is at least the length of the mounting portion of the steel beam, and the connection column is A longitudinal hole is formed in the body, an upper end of a lower steel column is connected to a lower surface of the connection column, and a lower end of an upper steel column is connected to an upper surface of the connection column. A steel column characterized by the following. 5. A rectangular steel pipe column above the connection part and a rectangular steel pipe column below the connection part are formed of rectangular steel pipes having the same length on one side, and the column body of the connection part is made of iron. The lower surface and the upper surface of the connection column are formed to be substantially the same as the length of one side of the rectangular steel pipe, and the height of the connection column is at least the mounting of the steel beam. Part length,
A steel column, characterized in that the connection column has a longitudinal hole, and lower and upper rectangular steel tube columns are connected to lower and upper surfaces of the connection column. 6. The rectangular steel pipe column above the connection portion is made of a rectangular steel pipe having a shorter side than the rectangular steel pipe column below the connection portion, and the column body of the connection portion is made of iron and has a truncated pyramid shape. The length of each side of the lower surface of the connection column is substantially equal to the length of each side of each lower shaped steel pipe column, and the upper surface of the connection column is formed. The length of each side is substantially equal to the length of the square side of each upper steel pipe column, the height of the connection column is at least the length of the mounting portion of the steel beam, and the connection column is It is provided with a longitudinal hole, the upper end of the square steel pipe column is coupled to the lower surface of the connection column, and the lower end of the upper rectangular steel column is coupled to the upper surface of the connection column. Steel column. 7. The upper part of the connection part And below the connection The pillar of the joint portion is constituted by a joint pillar integrally formed into a prismatic shape with iron, and the lower surface and the upper surface of the joint pillar are The flange has a shape substantially matching the outer shape of a rectangular prism in plan view surrounded by an extended surface of the outer surface of each flange, and the height of the connection column is at least the length of the mounting portion of the steel beam, The connection pillar has a longitudinal hole, and the lower and upper surfaces of the connection pillar are lower and upper. A steel column characterized by being joined. 8. The upper part of the connection part Is below the connection In the configuration, the column body of the connection portion is formed of a connection column body integrally formed into a truncated pyramid shape with iron, and the lower surface of the connection column body is located below. The shape of the flange is substantially the same as the external shape in a plan view of a quadrangular prism surrounded by an extension surface of the outer surface of each flange, and the upper surface of the connection column is positioned upward. The flange has a shape substantially matching the outer shape of a rectangular prism in plan view surrounded by an extended surface of the outer surface of each flange, and the height of the connection column is at least the length of the mounting portion of the steel beam, The connection pillar is provided with a longitudinal hole, and a lower surface is provided on a lower surface of the connection pillar. The upper end is joined to the upper surface of the A steel column, wherein the lower ends of the columns are joined.