JP7174576B2 - Column joint block and column joint structure - Google Patents

Description

The present invention relates to a column joint block and a column joint structure.

When constructing a steel frame column by joining multiple square steel pipes or circular steel pipes of a predetermined length on site, the joining method of joining steel pipes by welding is generally used, but joining by welding is laborious. It takes a lot of work, whether or not it can be done depends on the weather, and welding accuracy depends on the skill level. Therefore, by joining steel pipes with bolts, it is possible to solve these problems.

A column joint structure has been proposed that is formed by joining square steel pipe columns by the above-described bolt connection. Specifically, it includes a first joint portion joined to the upper end surface of the lower square steel pipe column and a second joint portion joined to the lower end surface of the upper square steel pipe column, and each joint portion has a square shape are provided, respectively, and are joined to each other by a fastening member while being in contact with each other. Here, the joint portion has a substantially cruciform outer shape in cross section and includes an end steel material portion in which a substantially cruciform hollow portion is formed. The end steel material portion is formed of, for example, four flat steel materials and four angle steels (L-shaped steel materials) having an L-shaped cross section (see, for example, Patent Document 1).

JP 2016-191258 A

In the column joint structure described in Patent Document 1, the cross-sectional shape of the end steel material portion is substantially cruciform, and a plurality of steel materials are joined to each other so that a substantially cruciform cavity is formed therein. Therefore, even if the plate thickness of the steel material itself is thin, it is possible to secure the required bending rigidity and bending strength by increasing the area of the outer shape. That is, in the case where the end steel member has a substantially cross-shaped outer shape in cross section and does not have a substantially cross-shaped cavity inside, the rigidity of the end steel member cannot be increased unless the plate thickness of the steel member is increased. . On the other hand, the end steel material part described in Patent Document 1 has a substantially cross-shaped cavity inside, so that the outer steel material in particular is positioned on the outer peripheral side of the end steel material part. Therefore, even if the plate thickness of the steel material is thin, it is possible to increase the overall rigidity of the end steel material portion.

However, with respect to the end plate, all four flat steel members and four angle steels having an L-shaped cross section, which constitute the end steel member, are joined by welding, and furthermore, the adjacent flat steel members and angle steels are joined together. are welded together at the factory, there is room for improvement in the labor involved in factory production. In addition, since each steel plate is welded to the end plate, for example, the flat plate steel material arranged near the edge of the end plate must be a predetermined distance from the edge of the end plate in order to secure the welding margin. Inevitably, it is arranged at a position set back to the inner side of the end plate, and the overall rigidity of the end steel part is inevitably lowered compared to the case where the flat steel material is arranged flush with the end side of the end plate. do not have.

The present invention has been made in view of the above problems. A column joint block for forming a column joint structure that does not require manufacturing labor and has high overall rigidity, and column joint blocks in which steel pipe columns are welded together. is bolted to provide a column joint structure.

In order to achieve the above object, one aspect of the column joint block according to the present invention is
An integrally formed column joint block that connects upper and lower steel pipe columns,
an end plate that is rectangular in plan view and has bolt holes near the corners of the rectangle;
A steel hollow body having an outer shape with notches formed by notching the corners of a square prism, one end of the body being attached to the end plate with the notches aligned with the bolt holes. and a main body having a bevel that is fixed and the other end of the main body is welded to the steel pipe column.

According to this aspect, the end plate and the hollow main body fixed to the end plate are integrally formed, so that the main body formed of a steel plate is joined to the end plate by welding, for example, at the factory. It is possible to significantly reduce the manufacturing labor in. In addition, the end of the main body that is not fixed to the end plate has a groove that is welded to the steel pipe column, so that the end of the steel pipe column and the column joint block can be welded at the factory. When joining, it is possible to save the trouble of processing a bevel at the end of the steel pipe column. In the column joint block of this aspect, since the entire column joint block is manufactured by integral molding, at the stage when the column joint block is manufactured, the end portion of the main body is provided with an endless joint conforming to the cross-sectional shape of the steel pipe column to be joined. A bevel having a shape (a frame shape such as a square, or a circular shape) is automatically formed.

Here, "integral molding" includes hot extrusion processing and the like in addition to casting. The main body has a shape with notches formed by notching the corners of a quadrangular prism. There is no risk of interference between the fixing tool and the main body when the bolt is inserted into the bolt hole of the end plate and bolted. The steel pipe columns include square steel pipes and circular steel pipes.

When the column joint structure is formed, the end portion having the groove of the column joint block and the steel pipe column are joined by groove welding in a factory or the like. Then, a steel pipe column having a column joint block at its end is transported to the site, where, for example, two steel pipe columns are erected, the end plates of both column joint blocks are brought into contact with each other, and the corresponding bolts are By inserting the bolt through the hole and fixing the bolt, the steel frame column can be constructed on site without welding.

Another aspect of the column joint block according to the present invention is
An integrally formed column joint block that connects upper and lower steel pipe columns,
one end plate that is rectangular in plan view and has bolt holes near the corners of the rectangle;
the other end plate, which is rectangular in plan view and has a groove welded to the steel pipe column;
A steel hollow body having an outer shape with notches formed by notching the corners of a square prism, and with the notches aligned with the bolt holes, both ends of the body are attached to the end plates. and a body secured to the body.

According to this aspect, the main body and the two end plates fixed to both ends of the main body are integrally molded, so that the column joint block can be manufactured at a factory without requiring manufacturing labor. This embodiment is a column joint block having two end plates at both ends of the main body. An endless groove is provided. Also, the other end plate abuts against the end plate of the other column joint block to be joined, and serves as an end plate fixed with bolts.

In another aspect of the column joint block according to the present invention, the four flat portions of the square column in the main body are flush with the end faces of the end plates,
The notch has a curved shape that bulges toward the center of the main body,
In the main body, the thickness of the cutout portion is formed to be thinner than the thickness of the flat portion.

According to this aspect, of the main body, the four flat portions of the quadrangular prism are arranged flush with the end faces of the end plates, resulting in a column joint block with high overall rigidity. This is because all the steel plates in the end steel parts described in Patent Document 1 are welded to the end plates, so the steel plates need to be set back inside the end plates by the welding allowance. Since the column joint block of this aspect is integrally formed by casting or the like as a whole, it can be realized by not requiring setback for welding allowance.

Furthermore, in the main body, the thickness of the four curved cutouts is formed thinner than the thickness of the four flat portions. This makes the thickness of the flat part (the flat part far from the center of the main body in a plan view), which affects the overall rigidity, relatively thick, while the curved notch bulging toward the center of the main body is Since it is close to the center of the main body, it has very little effect on the overall rigidity, so its thickness is made relatively thin. In this way, by changing the thickness of the member for each part according to the degree of influence on the overall rigidity, it is possible to manufacture a high-rigidity column joint block while suppressing the material cost as much as possible. In particular, in this aspect, since the entire column joint block is integrally formed by casting or the like, the thickness can be changed as desired for each part of the main body.

In another aspect of the post joint block according to the invention, the end plate has an opening.

According to this aspect, the material cost can be minimized by having an opening in, for example, the center of the end plate in either the form having the end plate at only one end of the main body or the form having end plates at both ends of the main body. can be effectively suppressed. In addition, since the main body has a hollow, the end plate has an opening, so that, for example, the inside of the steel pipe column is filled with a cement-based material (mortar or concrete). In the case of construction of steel frame reinforced concrete), the filling property of cementitious materials is improved.

Further, one aspect of the column joint structure according to the present invention is
The end plates of the two column joint blocks are abutted and bolted, and the ends of the upper and lower steel pipe columns are welded to the grooves of the respective column joint blocks. and

According to this aspect, the steel pipe columns joined to the column joint block with high overall rigidity by groove welding form a column joint structure by fixing both column joint blocks with bolts, resulting in high strength. It is possible to form a steel frame column joined with a joint structure. In addition, the column joint block manufactured by integral molding at the factory is joined to the steel pipe column by groove welding, transported to the site and fixed to each other with bolts to form the column joint structure, so the factory manufacturing cost It is possible to form a column joint structure while reducing the overall construction cost including.

In another aspect of the column joint structure according to the present invention, the lengths of the two column joint blocks are different,
The column joint block having a relatively long length has a length that can be bolted using a tool,
The column joint block having a relatively short length is characterized by having a length that allows insertion of a bolt.

According to this aspect, the length of the two column joint blocks to be joined is set to a length required for each of the joint blocks, thereby providing a combination of the two column joint blocks with reduced material costs. A column joint structure is formed.

As can be understood from the above description, according to the column joint block and the column joint structure of the present invention, the column joint block for forming the column joint structure with high overall rigidity and the column joint blocks that are easy to manufacture and have high overall rigidity are provided. are bolted together to provide a column joint structure.

It is the perspective view which looked at an example of the column joint block which concerns on 1st Embodiment from the diagonally downward direction. It is an II direction arrow view of FIG. 1, Comprising: It is the perspective view which looked at an example of the column joint block from diagonally above. FIG. 2 is a cross-sectional view of an example of a column joint block, which is a view taken along line III-III of FIG. 1; FIG. 4 is a vertical cross-sectional view showing a state in which a separate assembly unit located above is about to be joined to the assembly unit of the column joint block and the steel pipe column according to the first embodiment located below. Fig. 2 is a longitudinal sectional view of an example of a column joint structure according to the first embodiment, formed by joining upper and lower column joint blocks and steel pipe column assembly units with the column joint blocks according to the first embodiment. It is the perspective view which looked at an example of the column joint block which concerns on 2nd Embodiment from diagonally above. Fig. 10 is a vertical cross-sectional view of an example of a column joint structure according to a second embodiment, which is formed by joining upper and lower column joint blocks and steel pipe column assembly units with the column joint blocks according to the second embodiment.

Hereinafter, a column joint block and a column joint structure according to each embodiment will be described with reference to the accompanying drawings. In addition, in the present specification and drawings, substantially the same components may be denoted by the same reference numerals, thereby omitting duplicate descriptions.

[Column joint block according to the first embodiment]
First, an example of a column joint block according to a first embodiment will be described with reference to FIGS. 1 to 3. FIG. Here, FIG. 1 is a perspective view of an example of the column joint block according to the first embodiment as viewed obliquely from below. 2 is a view in the direction of arrow II in FIG. 1, which is a perspective view of an example of a column joint block seen obliquely from above, and FIG. 3 is a view in the direction of arrows III-III in FIG. 4 is a cross-sectional view of an example of a column joint block; FIG.

As shown in FIGS. 1 and 2, the post joint block 50 has a steel body 30 with a hollow 31 and two steel end plates 10, 20 fixed at opposite ends of the body 30. , the whole is manufactured by integral molding such as casting.

One end plate 10 has a rectangular shape in plan view, and has bolt holes 13 near four corners 12 of the rectangle. The other end plate 20 is similarly rectangular in plan view, and has a groove 21 that is welded to the steel pipe column (see FIG. 4, etc.). The groove 21 has an endless shape (a square frame shape in the illustrated example) adapted to the cross-sectional shape of the steel pipe column to be joined.

The main body 30 has an outer shape having four notches 33 formed by notching the corners of a quadrangular prism and four flat portions 32 . One end is fixed to the plate 10 . A notch 33 of the main body 30 has a curved shape that bulges toward the center of the main body 30 .

As clearly shown in FIG. 3, the four flat portions 32 are flush with the end face 11 of the end plate 10, and the notch portion 33 is curved toward the center of the main body 30 as described above. . The thickness t2 of the notch portion 33 is formed to be thinner than the thickness t1 of the flat portion 32 .

In the main body 30, the four flat portions 32 are arranged flush with the end face 11 of the end plate 10, so that the column joint block 50 has high overall rigidity. If the main body is all welded to steel plates and is also welded to the end plates, the steel plates for the main body are placed inside the end plates by the amount of welding margin in order to weld the steel plates that form the main body to the end plates. is set back, and the main body is set back inside the end plate. On the other hand, in the column joint block 50 of the illustrated example, since the whole is integrally formed by casting or the like, the flat portion 32 does not need to be set back for the welding margin, so that the flat portion 32 is attached to the end surface 11 of the end plate 10. It is possible to arrange them flush with each other, and it is possible to increase the overall rigidity of the column joint block 50 without excessively increasing the thickness of the flat portion 32 and the notch portion 33 .

Regarding the difference between the thickness t1 of the flat portion 32 and the thickness t2 of the notch portion 33, as shown in FIG. The flat portion 32 at the bottom has a high degree of influence on the overall stiffness of the body 30 . On the other hand, the curved notch 33 bulging toward the center O of the main body 30 is located near the center of the main body 30 (distance s2 to the centroid of the notch 33). Low impact. Therefore, by changing the thickness t1 of the flat portion 32 and the thickness t2 of the notch portion 33 according to the degree of influence on the overall rigidity, the high-rigidity column joint block 50 is manufactured while suppressing the material cost as much as possible. be able to. In particular, the column joint block 50 of the illustrated example is manufactured by integral molding such as casting, so that the thickness of each part of the main body 30 can be changed as desired.

In the column joint block 50, the end plates 10, 20 and the main body 30 having the hollow 31 fixed to the end plates 10, 20 are integrally formed, so that the main body is compared with the form in which the main body is manufactured by welding steel plates. In this case, the production effort in the factory can be significantly reduced. In addition, since the end plate 20 has the groove 21 welded to the steel pipe column, when joining the end of the steel pipe column and the column joint block 50 by welding at the factory, the end of the steel pipe column It is possible to save the trouble of processing a bevel in the part. Since the column joint block 50 of the illustrated example is manufactured by integral molding, when the column joint block 50 is manufactured, the surface of the end plate 20 has a cross-sectional shape of the steel pipe column to be joined. A matching endless (square frame-shaped in the illustrated example) groove 21 is automatically formed.

Furthermore, since both the end plates 10 and 20 have the openings 14 and 22 in their centers, the material cost of the column joint block 50 can be suppressed as much as possible and the weight of the column joint block 50 can be reduced. can be reduced. Here, since the main body 30 has a hollow 31, the end plates 10 and 20 have openings 14 and 22, so that, for example, a filled type SRC column in which the inside of a steel pipe column is filled with a cementitious material is formed. When constructing, the hollow 31 and the openings 14 and 22 communicate with each other, so that the filling property of the cementitious material is improved.

[Column joint structure according to the first embodiment]
Next, an example of the column joint structure according to the first embodiment will be described with reference to FIGS. 4 and 5. FIG. Here, FIG. 4 is a vertical cross-sectional view showing a state in which a separate assembly unit above is about to be joined to the assembly unit of the column joint block and the steel pipe column according to the first embodiment below. be. FIG. 5 shows an example of the column joint structure according to the first embodiment, which is formed by joining upper and lower column joint blocks and steel pipe column assembly units with the column joint blocks according to the first embodiment. It is a longitudinal cross-sectional view.

As shown in FIG. 4, the two column joint blocks 50, 50A forming the column joint structure have different lengths t3, t4. The relatively long column joint block 50 has a length that allows bolt fixing construction using a tool such as a shear wrench (not shown) on site. On the other hand, the relatively short column joint block 50A has a length that allows insertion of a bolt gripped by a worker's fingers. In this way, by setting the lengths of the two column joint blocks 50 and 50A to be joined to the respective required lengths during the joining operation, it is possible to combine the two column joint blocks with reduced material costs. A post joint structure having

At the factory, the end portion of the steel pipe column 60A is brought into contact with the groove 21 of the end plate 20 of the column joint block 50, and joined via the welded portion Y by groove welding, thereby forming the upper unit 70. is produced. Similarly, in the factory, the end of the steel pipe column 60B is brought into contact with the groove 21 of the end plate 20 of the column joint block 50A, and joined via the welded portion Y by groove welding. A lower unit 80 is fabricated. Here, for the steel pipe columns 60A and 60B, for example, STKR400 and STKR490, which are JIS products based on JIS G 3466 (square steel pipes for general structures), can be applied. In addition, BCR (Box Column Roll cold roll formed square steel pipe for building structure, registered trademark) and BCP (Box Column Press cold press formed square steel pipe for building structure, registered Trademark) can be applied.

The upper unit 70 and the lower unit 80 are transported to the construction site. At the construction site, the lower unit 80 is erected first, and the upper unit 70 is erected from above as indicated by the arrow in FIG. The end plates 10 of the blocks 50 and 50A are brought into contact with each other, and the corresponding bolt holes 13 are positioned. Then, as shown in FIG. 5, a worker inserts a bolt 91 such as a high-tension bolt into the communicating bolt hole 13 from the side of the main body 30A of the short column joint block 50A. After that, on the side of the main body 30 of the long column joint block 50, the nut 92 is bolted with a shear wrench (not shown) (formation of the bolt fixing part 90), thereby eliminating the need for welding. Field construction of the column is accomplished and the column joint structure 100 is formed. The vertical relationship between the upper unit 70 and the lower unit 80 may be reversed. In this case, the long column joint block 50 is positioned below, and the bolts are fixed with a shear wrench at the lower position. will be

[Column joint block and column joint structure according to the second embodiment]
Next, with reference to FIG.6 and FIG.7, the column joint structure which concerns on 2nd Embodiment, and an example of a column joint structure are demonstrated. Here, FIG. 6 is a perspective view of an example of the column joint block according to the second embodiment, viewed obliquely from above. FIG. 7 shows an example of a column joint structure according to the second embodiment, which is formed by joining upper and lower column joint blocks and steel pipe column assembly units with the column joint blocks according to the second embodiment. It is a longitudinal cross-sectional view.

Unlike the column joint blocks 50 and 50A, the column joint block 50B shown in FIG. 6 has the end plate 10 only on one side of the main body 30 and does not have the end plate 20 that the column joint block 50 and the like have.

At the other end of the main body 30, which is opposite to the side fixed to the end plate 10, an endless (square frame-shaped in the illustrated example) bevel 34 that conforms to the cross-sectional shape of the steel pipe column to be joined is provided. there is Since the column joint block 50B is also integrally manufactured as a whole, the bevel 34 is automatically formed in the end face of the main body 30 at the stage when the column joint block 50B is manufactured.

As shown in FIG. 7, two column joint blocks 50B and 50C with different lengths are respectively welded and joined to steel pipe columns 60A and 60B in a factory, and an upper unit 70A and a lower unit 80A are transported to the construction site. , are bolted together at the construction site. At the factory, the end of the steel pipe column 60A is brought into contact with the groove 34 of the end face of the column joint block 50B, and joined via the welded portion Y by groove welding to manufacture the upper unit 70A. be done. Similarly, in the factory, the end of the steel pipe column 60B is brought into contact with the groove 34 of the end face of the column joint block 50C, and joined via the welded portion Y by groove welding, whereby the lower unit 80A is produced.

As shown in FIG. 7, a bolt 91 such as a high-tension bolt is inserted through the bolt holes 13 of the end plates 10 of the column joint blocks 50B and 50C that are in contact with each other, and a nut 92 is tightened (bolt fixing portion 90), the post joint structure 100A is formed.

Other embodiments may be possible in which other components are combined with the configurations and the like described in the above embodiments, and the present invention is not limited to the configurations shown here. Regarding this point, it is possible to change without departing from the gist of the present invention, and it can be determined appropriately according to the application form.

10: End plate, 11: End face, 12: Corner, 13: Bolt hole, 14: Opening, 20: End plate, 21: Bevel, 22: Opening, 30: Main body, 31, 31A: Hollow, 32: Flat part, 33: notch, 34: groove, 50, 50A, 50B, 50C: column joint block, 60A, 60B: steel pipe column, 70, 70A: upper unit, 80, 80A: lower unit, 90: bolt fixing Part, 91: Bolt, 92: Nut, 100, 100A: Column joint structure, Y: Welded portion (groove welded portion)

Claims (7)

An integrally formed column joint block that connects upper and lower steel pipe columns,
an end plate that is rectangular in plan view and has bolt holes near the corners of the rectangle;
A steel hollow body having an outer shape with notches formed by notching the corners of a square prism, one end of the body being attached to the end plate with the notches aligned with the bolt holes. a body having a bevel that is fixed and the other end of the body is welded to the steel pipe column;
Four flat portions of the quadrangular prism in the main body are flush with the end faces of the end plates,
The notch has a curved shape that bulges toward the center of the main body,
A column joint block, wherein the thickness of the notch portion of the main body is formed to be thinner than the thickness of the flat portion. An integrally formed column joint block that connects upper and lower steel pipe columns,
an end plate that is rectangular in plan view and has bolt holes near the corners of the rectangle;
A steel hollow body having an outer shape with notches formed by notching the corners of a square prism, one end of the body being attached to the end plate with the notches aligned with the bolt holes. a body having a bevel that is fixed and the other end of the body is welded to the steel pipe column;
A column joint block, wherein the end plate has an opening. An integrally formed column joint block that connects upper and lower steel pipe columns,
one end plate that is rectangular in plan view and has bolt holes near the corners of the rectangle;
the other end plate, which is rectangular in plan view and has a groove welded to the steel pipe column;
A steel hollow body having an outer shape with notches formed by notching the corners of a square prism, and with the notches aligned with the bolt holes, both ends of the body are attached to the end plates. a body fixed to a column joint block; Four flat portions of the quadrangular prism in the main body are flush with the end faces of the end plates,
The notch has a curved shape that bulges toward the center of the main body,
4. The column joint block according to claim 3 , wherein the thickness of the notch portion of the main body is formed to be thinner than the thickness of the flat portion. A column joint block according to claim 3 or 4 , characterized in that said end plates have openings. The end plates of the two column joint blocks according to any one of claims 1 to 5 are abutted and bolted, and the upper and lower steel pipe columns are attached to the grooves of the respective column joint blocks. A column joint structure, characterized in that the ends are welded together. The lengths of the two column joint blocks are different,
The column joint block having a relatively long length has a length that can be bolted using a tool,
7. The column joint structure according to claim 6 , wherein the column joint block having a relatively short length has a length that enables insertion of a bolt.

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