JP2840209B2 - Column-column joint structure of steel pipe columns of different diameter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a column-column joint structure for connecting upper and lower steel pipe columns having different pipe diameters.

[0002]

2. Description of the Related Art Conventionally, when joining upper and lower steel pipe columns having different pipe diameters, the column is generally restricted as shown in FIG.
This is done at the beam joint. That is, the upper and lower steel pipe columns 10
1 and 102, the tapered tube 103 is welded through the diaphragms 104 and 105, and the diaphragm 10 is welded.
4, 105, upper and lower flanges 106a, 106 of the beam 106
b is welded. The beam 106 has its ends cut diagonally along the side surface of the tapered cylinder 103, and the ends of the upper and lower flanges 106a, 106b are dimensioned so as to abut against the end surfaces of the upper and lower diaphragms 104, 105 having different sizes. Processing.

[0003]

As described above, since the column is conventionally drawn at the column / beam joint, it is necessary to process the end of the beam 106 so as to match the drawn shape of the column. There was a problem that processing was complicated and cost increased. Further, since the joint between the column and the beam is a place where a large force acts in a complicated manner, it is necessary to keep the quality of welding high, and quality control is not easy.

[0004] It is an object of the present invention to provide a column-column joint structure of different diameter steel tube columns which can easily join upper and lower columns having different pipe diameters with a simple structure and can easily control quality.

[0005]

According to the present invention, there is provided a column / column joint structure for steel pipe columns of different diameters, wherein an upper column and a lower column each composed of a steel pipe column are connected to each other, and upper and lower ends thereof are connected to the upper column and the lower column. It is joined via a tapered cylinder having the same outer diameter, and this joint is arranged in the middle between the upper beam and the lower beam. The tapered tube has a straight tube portion having the same outer diameter as the upper and lower columns following the upper and lower portions of the taper tube portion, and the upper straight tube portion and the lower straight tube portion are bolted together with the upper and lower columns together with the attachment plate. You may join. In the case of this configuration, it is preferable that one or both of the bolts on the straight tube portion side and the column side among the bolts that join the upper and lower straight tube portions and the column of the tapered tube with the attachment plate are one-side bolts. Further, the tapered cylinder may be a drawn product of a steel pipe. The term "one-side bolt" as used in this specification is a general term for a shaft-shaped fastener that can be tightened by operating the one end and the head is formed by plastic deformation in an enlarged state at the other end, and is also called a blind bolt. Have been.

[0006]

According to this configuration, since the joints of the upper and lower pillars having different diameters by the tapered cylinders are arranged in the middle between the upper beam and the lower beam, the flow of the force acting on the joint is simple, and therefore the quality is high. Easy management and cost reduction. In the case where the tapered tube has straight upper and lower tube portions and is bolted to the upper and lower columns together with the supporting plate, the upper and lower columns having different pipe diameters can be easily joined without welding. When a one-side bolt is used as the joining bolt, the joining operation can be performed in a closed cross section, so that the operation is further facilitated. In this case, when a type of the one-side bolt that can be retightened is used, temporary assembly and the like can be easily performed. When the tapered cylinder is a drawn product of a steel pipe, the cost of members can be reduced.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. Columns of different diameter steel pipe columns according to this embodiment
As shown in FIG. 2 (B), the column-jointed structure is a joint between the upper rectangular steel pipe column 1 and the lower rectangular steel pipe column 2 having a larger pipe diameter. 13 in the middle position,
The upper column 1 and the lower column 2 are joined via a tapered tube 3. The outer diameter of the upper end and the lower end of the tapered cylinder 3 is the same as the outer diameter of the upper column 1 and the lower column 2.

As shown in the plan view of FIG. 1B, the tapered tube 3 is a square tube having a square cross section in which the lower end opening and the upper end opening are arranged concentrically. And has straight cylindrical portions 3b and 3c having the same outer diameter as the upper and lower columns 1 and 2, respectively. Upper straight tube portion 3b and lower straight tube portion 3c
A plurality of bolt insertion holes 7a and 7b through which the one-side bolt 6 is inserted are formed on each of the four surfaces. The tapered tube 3 uses a drawn product of a steel pipe, so that the wall thickness of the tube gradually increases from the tapered tube portion 3a to the upper straight tube portion 3b as shown in FIG. The tapered tube 3 may be a cast steel product such as cast iron or cast steel, or a forged product. In this case, the thickness of the pipe wall may be constant, or the thickness may gradually change as described above.

A plurality of bolt insertion holes 8 and 9 through which the one-side bolt 6 is inserted are formed on each of the four surfaces at the lower end of the upper steel pipe column 1 and the upper end of the lower steel pipe column 2. The upper straight portion 3b of the tapered tube 3 and the lower end of the upper steel tube column 1 and the lower straight tube portion 3c of the tapered tube 3 and the lower end of the lower steel tube column 2 are one-sided via attachment plates 4 and 5, respectively. The upper and lower columns 1 and 2 are joined by bolts 6.
Four upper attachment plates, which are arranged so as to extend from the respective lower surfaces of the upper column 1 to the respective surfaces of the upper straight cylindrical portion 3b of the tapered tube 3, have a plurality of bolts aligned with the bolt insertion holes 8 of the upper column 1. And a plurality of bolt insertion holes 10b that are aligned with the bolt insertion holes 7a of the upper straight cylindrical portion 3b of the tapered cylinder 3. In addition, the lower straight cylinder portion 3c of the tapered cylinder 3
The four lower attachment plates 5 arranged so as to extend from each surface to the upper surface of the lower column 2 are aligned with the bolt insertion holes 7b of the lower straight cylindrical portion 3c of the tapered cylinder 3. A plurality of bolt insertion holes 11a and a plurality of bolt insertion holes 11b matching the bolt insertion holes 9 at the upper end of the lower pillar 2 are formed.

The bolt connection between the lower end of the upper post 1 and the upper straight tube portion 3b of the tapered tube 3 is performed by a one-side bolt 6 from the bolt insertion hole 10a of the upper attachment plate 4 to the corresponding bolt insertion hole 8 of the upper post 1. , And the upper attachment plate 4 is fastened and fixed to the lower end of the upper column 1.
Upper cylindrical portion 3 of tapered cylinder 3 from bolt insertion hole 10b of
This is performed by allowing the one-side bolt 6 to pass through the corresponding bolt insertion hole 7a of FIG. b, and tightening and fixing the upper attachment plate 4 to the upper straight tube portion 3b of the tapered tube 3. The upper end of the lower pillar 2 and the lower straight cylindrical portion 3c of the tapered cylinder 3
The one-side bolt 6 is passed from the bolt insertion hole 11a of the lower attachment plate 5 to the corresponding bolt insertion hole 7b of the lower straight cylindrical portion 3c of the tapered cylinder 3 so that the lower attachment plate 5 is positioned below the tapered cylinder 3. The one-side bolt 6 is passed from the bolt insertion hole 11b of the lower attachment plate 5 to the corresponding bolt insertion hole 9 of the lower pillar 2 while being fixed to the straight tube portion 3c. This is done by tightening and fixing to the upper end of the.

FIG. 3 shows an example of the one-side bolt 6 used for the bolt connection. This one side 6 is pin 3
7, a valve sleeve 38, a grip sleeve 39, a shear washer 40, a receiving washer 41, and a nut 4, which are sequentially arranged on the outer periphery of the pin 37 from the pin head 37 a side.
2 shall be provided. The pin 37 has a breaking groove 37d in the middle of the screw portion 37b following the round shaft portion 37e, and has a pin head 37a at the tip end slightly larger in diameter than the pin diameter.
A short pin tail 37c is provided following the screw portion 37b. The pin tail 37c has an outer diameter surface formed as a non-slip uneven surface. The bubble sleeve 38 is formed of a material softer than the grip sleeve 39, and can be plastically deformed outward in a flange shape by a load of an axial force. For example, the grip sleeve 39 is made of a hard steel alloy, and the bubble sleeve 38 is made of a soft steel alloy. The receiving washer 41
An annular groove 41a is formed in the inner diameter of the grip sleeve 39 so that the grip sleeve 39 can enter, and an outer peripheral portion of the shear washer 40 is fitted on a side surface on the pin head side. The shear washer 40 has an inner peripheral portion engaged with the end face of the grip sleeve 39 and shears with a predetermined axial force. In this example, the round shaft portion 37e of the pin 37 is used.
Slightly to a larger diameter via a step portion 37f also the leading end portion 37e ₁ from proximal portion 37e ₂ of the grip sleeve 3
The inner diameter of 9 is as smaller diameter than the distal portion 37e _1. The round shaft portion 37e may have the same diameter over the entire length.

The fastening operation of the one-side bolt 6 can be performed using a rotary electric tightening tool (not shown). That is, with the pin tail 37c held by the tightening tool, the nut 42 is tightened by the box-shaped nut engaging portion of the tool. As a result, a compressive force acts between the pin head 37a and the shear washer 40, and the grip sleeve 3
The valve sleeve 9 and the valve sleeve 38 are sandwiched, and first, the valve sleeve 38 at the distal end begins to plastically deform outward in a flange shape. That is, valving occurs. Round shaft part 3 of pin 37
When the step 7e is stepped, the above-described valving occurs until the grip sleeve 39 engages with the step 37f. When the nut 42 is further tightened, the shear washer 40 is sheared, and the grip sleeve 39 is moved to the shear washer 40.
To enter. As a result, when the flange-shaped deformed portion 38a of the valve sleeve 38 engages with the inner surface of the upper column 1 (the lower column 2, the upper straight tube portion 3b of the tapered tube 3, and the lower straight tube portion 3c),
Between the nut 42 and the flange-shaped deformed portion 38a, the upper attachment plate 4 (the lower attachment plate 5) and the upper column 1 (the lower column 2, the upper straight tube portion 3b of the tapered tube 3, and the lower straight tube portion 3c). , A tightening axial force is introduced. When the nut 42 is further tightened and rotated, the pin tail 37c is rotated in a state where a predetermined axial force is introduced.
Breaks at the break groove 37d (FIG. 3B).

When this one-side bolt 6 is used,
Strong bonding can be performed as follows. That is, the shearing force of the shear washer 40 causes the tightening force between the nut 42 and the flange-shaped deformed portion 38a of the valve sleeve 38 to remain unchanged, as the upper supporting plate 4 (the lower supporting plate 5) and the upper column 1 (the lower column). 2, a tightening force sandwiching the upper straight tube portion 3b and the lower straight tube portion 3c) of the tapered tube 3 to obtain a strong tightening force. In the case of the one-side bolt 6, the following advantages can be obtained. First, since the flange-shaped deformed portion 38a of the valve sleeve 38 serving as a bolt head greatly expands, the inner attachment plate 3
The contact pressure with the bolt becomes small, and a relatively allowable width is obtained for the bolt hole diameter. For example, the problem that the edge of the bolt insertion hole 7a is deformed by the contact pressure and the bolt head is fitted hardly occurs.
Along with this, the supporting force of the bolt head composed of the flange-shaped deformed portion 38a is improved, the tightening force of the one-side bolt 5 is improved, and the efficiency is improved. In addition, since the nut 42 is rotated and tightened, it can be tightened twice or re-tightened. In addition, electric equipment is used for tightening, and handling on site is easy.

FIG. 4 shows a second embodiment of the present invention. The pillar-column joint structure of this embodiment is a one-side bolt 6 used to join the lower straight portion 3c of the tapered tube 3 and the upper end of the lower pillar 2 in the first embodiment. Is replaced by a high-strength bolt 16. The lower end of the upper column 1 and the upper straight cylindrical portion 3b of the tapered tube 3 are joined with the one-side bolt 6 via the upper attachment plate 4, and other configurations are the same as those of the first embodiment. In the case of this embodiment, the lower straight portion 3c of the tapered tube 3 and the lower column 2 are bolted together by a high-strength bolt 14 in a factory or the like, and the upper straight portion 3b of the tapered tube 3 is Bolt joining with the upper pillar 1 by the one-side bolt 6 is performed later on site. When the high-strength bolt 16 is joined, the upper end side of the tapered tube 3 is in an open state, so that the joining operation can be easily performed by inserting a hand into the tapered tube 3. The high-strength bolt 16 may be temporarily tightened at first, and may be fully tightened after joining with the one-side bolt 6.

FIG. 5 shows a third embodiment of the present invention. The column-column joint structure of this embodiment is different from the first embodiment in that the one-side bolt 6 used to join the upper straight cylindrical portion 3b of the tapered tube 3 and the lower end of the upper column 1 is used. The high strength bolt 16 is replaced. The upper end of the lower column 2 and the lower straight cylindrical portion 3c of the tapered tube 3 are joined by a one-side bolt 6 via a lower attachment plate 5, and other configurations are the same as those of the first embodiment. It is. In the case of this embodiment, the upper straight tube portion 3b of the tapered tube 3 and the upper column 1 are first joined by a high-strength bolt 14 in a factory or the like, and the lower straight tube portion 3c of the tapered tube 3 and the lower side. Bolt joining with the pillar 2 by the one-side bolt 6 is performed later on site.

FIGS. 6A and 6B respectively show a fourth embodiment of the present invention.
And a fifth embodiment will be described. The column-column joint structure of the fourth embodiment (FIG. 6A) is different from the first embodiment in that the lower straight portion 3c of the tapered tube 3 and the upper end of the lower column 2 are bolted together. Instead, they are directly joined by welding 17. The lower end of the upper column 1 and the upper straight tube portion 3b of the tapered tube 3 are joined by the one-side bolt 6 via the upper attachment plate 4, and other configurations are the same as those of the first embodiment. In addition, the lower straight cylinder portion 3 of the tapered cylinder 3
For c, does not need the bonding margins of the lower subscript plate 5, the height H ₁ is a height enough to enable easy welding, for example, 50mm
Degree is fine. In the case of this embodiment, the lower straight portion 3c of the tapered tube 3 and the lower column 2 are joined by welding 17 at the factory, and the one-side bolt between the upper straight portion 3b of the tapered tube 3 and the upper column 1 is formed. 6 is performed on site. Since the joining by the welding 17 can be performed at the factory, the work and the quality control become easy.

The column-column joint structure of the fifth embodiment (FIG. 6)
(B)) shows the tapered cylinder 3 in the first embodiment.
The upper straight portion 3b and the lower end of the upper column 1 are directly joined by welding 17 instead of being bolted. Upper end of lower column 2 and lower straight tube portion 3c of tapered tube 3
Are joined by a one-side bolt 6 via a lower attachment plate 5, and other configurations are the same as those of the first embodiment. Again, the upper straight tubular portion 3b of the tapered tube 3, since the bonding margins of the upper subscript plate 5 does not need, and the height H ₂ is the height of the degree that can be easily welded 50mm
Degree is fine. In the case of this embodiment, the upper straight portion 3b of the tapered tube 3 and the upper column 1 are joined by welding 17 at the factory, and the one-side bolt between the lower straight portion 3c of the tapered tube 3 and the lower column 2 is formed. 6 is carried out on site. Also in this case, since the joining by the welding 17 can be performed at the factory, the work and the quality control become easy.

FIGS. 7A to 7D respectively show a sixth embodiment of the present invention.
The eighth to eighth embodiments and their modifications will be described. The column-column joint structure (FIG. 7A) of the sixth embodiment is configured such that the lower end of the upper column 1 and the upper straight cylindrical portion 3b of the tapered cylinder 3 are sandwiched between two upper and lower upper attachment plates 4, 14 through one side bolt 6
And the upper end of the lower column 2 and the tapered tube 3
The lower straight cylindrical portion 3c is joined by one-side bolts 6 via two lower supporting plates 5 and 15 sandwiching the lower straight cylindrical portion 3c. The upper attachment plate 14 and the lower attachment plate 15 arranged on the back side have the same shape as the upper attachment plate 4 and the lower attachment plate 5 arranged on the front side. Other configurations are first
This is the same as the embodiment. In the case of this embodiment, the upper and lower pillars 1
Since the butting portion of the tapered tube 2 and the tapered tube 3 is sandwiched between the two front and back attachment plates 4, 14 (5, 15) and joined by two-surface shearing bolts, the joining strength is improved. Note that the tapered tube 3 is a drawn product of a steel pipe as in the example of FIG.
When the wall thickness of the tube wall is thicker in the upper straight cylindrical portion 3b,
As shown in FIG. 7 (D), a liner plate 40 corresponding to the thickness difference from the upper column 1 is interposed between the inner surface of the upper column 1 and the upper side attachment plate 14 on the inner surface side.

The column-column joint structure of the seventh embodiment (FIG. 7)
(B)) is the tapered cylinder 3 according to the sixth embodiment.
The one-side bolt 6 used to join the lower straight cylindrical portion 3c and the upper end of the lower column 2 is replaced with a high-strength bolt 16. The lower end of the upper column 1 and the upper straight tube portion 3b of the tapered tube 3 are joined by one-side bolts 6 via two front and back upper attachment plates 4 and 14, and other configurations are the same as those of the sixth embodiment. Same as in the case. In the case of this embodiment, the lower straight tube portion 3c of the tapered tube 3 and the lower column 2 are first joined by a high-strength bolt 14 in a factory or the like, and the upper straight tube portion 3b of the tapered tube 3 and the upper The bolt connection with the column 1 by the one-side bolt 6 is performed later on site.

The column-column joint structure of the eighth embodiment (FIG. 7)
(C)) is a one-side bolt 6 used to join the upper straight portion 3b of the tapered tube 3 and the lower end of the upper column 1 in the sixth embodiment (FIG. 7 (A)). Is replaced by a high-strength bolt 16. Joining the lower end of the upper column 1 and the upper straight cylindrical portion 3b of the tapered tube 3 with one-side bolts 6 via two front and back upper attachment plates 4 and 14;
The other configuration is the same as that of the sixth embodiment. In the case of this embodiment, the upper straight tube portion 3b of the tapered tube 3
The high-strength bolt 14 is connected to the upper column 1 at the factory, and the one-side bolt 6 is used to connect the lower straight column 3c of the tapered tube 3 and the lower column 2 at the site.

FIGS. 8A and 8B show ninth and tenth embodiments of the present invention, respectively. The column / column joint structure of the ninth embodiment (FIG. 8A) is similar to that of the sixth embodiment (FIG. 7).
In (A)), the lower straight tube portion 3c of the tapered tube 3 and the upper end of the lower column 2 are directly joined by welding 17 instead of being joined by bolts. The lower end of the upper column 1 and the upper straight cylindrical portion 3b of the tapered tube 3 are joined by one-side bolts 6 via two upper and lower supporting plates 4 and 14, and other configurations are the same as those of the sixth embodiment. Same as in the case.

The column-column joint structure of the tenth embodiment (FIG. 8)
(B)) is a welding 17 instead of the above-mentioned sixth embodiment (FIG. 7 (A)) in which the upper straight portion 3b of the tapered tube 3 and the lower end of the upper column 1 are bolted. Are directly joined together. Upper end of lower pillar 2 and tapered cylinder 3
The lower straight tube portion 3c is joined to the lower straight tube portion 3c by one-side bolts 6 via two lower attachment plates 5 and 15, and the other configuration is the same as that of the sixth embodiment.

In each of the above embodiments, as shown in the plan view of FIG. 1B, a tapered cylinder 3 having a square cross section having a lower end opening and an upper end opening arranged concentrically is used. As shown in a plan view of FIG.
The taper having a shape in which the tapered tubular portion 3a and the upper straight tubular portion 3b are eccentric with respect to the lower straight tubular portion 3c so that one side surface is aligned with the same plane over the tapered tubular portion 3a and the upper straight tubular portion 3b from c. The cylindrical tube 3A may be used. FIG.
As shown in the plan view of FIG. 2B, the lower straight cylinder 3c and the upper straight cylinder 3b extend from the lower straight cylinder 3c to the adjacent two cylinders.
A tapered tube 3B having a shape in which the tapered tube portion 3a and the upper straight tube portion 3b are eccentric to one corner portion with respect to the lower straight tube portion 3c so that the three side surfaces are aligned on the same plane may be used. Each of the tapered cylinders 3, 3A, 3B shown in FIG. 1 (B) and FIGS. 9 (A), 9 (B) can be properly used, for example, as shown in a plan view in FIG. 9 (C). That is, the non-eccentric tapered tube 3 is positioned inside the building, the tapered tube 3A eccentric to one side is positioned at the middle position of the building outer periphery, and the tapered tube 3B eccentric toward the corner is positioned at the corner of the building outer periphery. Place each. Thereby, the upper straight tube portions 3b of the tapered tubes 3A and 3B can be arranged at positions along the outer peripheral edge of the building, and it becomes easy to finish the outer wall surface of the building on the same plane, and the center of each upper column is concentric. Thus, the beams to be joined between these upper columns can be aligned at concentric positions.

FIGS. 10 and 11 show an eleventh embodiment of the present invention. In the column / column joint structure of this embodiment, the joint between the upper round steel tube column 1A and the lower round steel tube column 2A having a larger tube diameter is the same as that of FIG. 2B. Is disposed at an intermediate position between the upper beam 12 and the lower beam 13, and has a tapered tube 23 whose upper and lower ends have the same outer diameter as the upper column 1 </ b> A and the lower column 2 </ b> A. , The upper pillar 1
A and the lower pillar 2A are joined.

As shown in the plan view of FIG. 10B, the tapered cylinder 23 is a cylindrical body whose lower end opening and upper end opening are arranged concentrically. The upper and lower columns 1A follow the upper and lower portions of the tapered cylindrical portion 23a. , 2B have the same outer diameter as the straight cylindrical portions 23b, 23
c. A plurality of bolt insertion holes through which the one-side bolt 6 is inserted at a plurality of circumferential positions in the upper straight tube portion 23b and the lower straight tube portion 23c, for example, at three equally spaced positions, as in the first embodiment (FIG. 1). 7a and 7b are formed respectively.

The lower end of the upper steel column 1A and the lower steel column 2
B, the bolt insertion hole 7 of the tapered cylinder 23 is also provided.
A plurality of bolt insertion holes 8 and 9 for inserting the one-side bolt 6 are formed at three equally spaced positions in the circumferential direction corresponding to the positions a and 7b, as in the first embodiment (FIG. 1). I have. The upper straight portion 23b of the tapered tube 23 and the lower end of the upper steel pipe column 1A, and the lower straight portion 23c of the tapered tube 23
And the lower ends of the lower steel pipe columns 2A are attached to the attachment plates 24 and 2 respectively.
The upper and lower pillars 1A and 2A are joined together by a one-side bolt 6 via 5. The three upper attachment plates 24 arranged so as to extend from the lower end surface of the upper pillar 1A to the surface of the upper straight cylindrical portion 23b of the tapered tube 23 have the attachment plate 4 of the first embodiment (FIG. 1). Similarly, a plurality of bolt insertion holes 10a aligned with the bolt insertion holes 8 of the upper column 1A and a plurality of bolt insertion holes 10b aligned with the bolt insertion holes 7a of the upper straight cylindrical portion 23b of the tapered cylinder 23 are formed. I have. In addition, the three lower attachment plates 25 arranged from the surface of the lower straight cylindrical portion 23c of the tapered cylinder 23 to the surface of the upper end of the lower pillar 2 also have the lower straight cylinder of the tapered cylinder 23. A plurality of bolt insertion holes 11a aligned with the bolt insertion holes 7b of the portion 23c;
A plurality of bolt insertion holes 11b are formed which are aligned with the bolt insertion holes 9 at the upper end of the lower pillar 2A. The upper side plate 24 and the lower side plate 25 are formed as shown in FIG.
As shown in (C), the upper and lower pillars 1A, 2A and the tapered tube 23 have an arc-shaped cross-section plate having an inner diameter surface having a radius of curvature smaller than the outer diameter surface of the upper and lower straight cylindrical portions 23b, 23c. It is made to adapt. Thereby, the adhesion of the contact surfaces of the attachment plates 24 and 25 is improved.

The bolt connection between the lower end of the upper column 1A and the upper straight cylindrical portion 23b of the tapered tube 23 is performed in the same manner as in the first embodiment (FIG. 1). That is, the bolt insertion hole 8a of the upper pillar 1A is shifted from the bolt insertion hole 10a of the upper attachment plate 24.
Through the one-side bolt 6, and the upper attachment plate 24 is fastened and fixed to the lower end of the upper column 1A. Further, the tapered cylinder 23 is inserted through the bolt insertion hole 10b of the upper attachment plate 24.
The one-side bolt 6 is passed through the corresponding bolt insertion hole 7a of the upper straight cylindrical part 23b, and the upper attachment plate 24 is fastened and fixed to the upper straight cylindrical part 23b of the tapered cylinder 23. Regarding the upper end of the lower column 2A and the lower straight cylindrical portion 23c of the tapered tube 23, the bolt insertion hole 11 of the lower attachment plate 25 is also provided.
a, the one-side bolt 6 is passed through the corresponding bolt insertion hole 7b of the lower straight cylindrical portion 23c of the tapered tube 23, and the lower attachment plate 25 is connected to the lower straight cylindrical portion 23 of the tapered tube 23.
c. Further, the bolt insertion hole 9b of the lower pillar 2A is connected to the corresponding bolt insertion hole 9b of the lower pillar 2A.
Through the one-side bolt 6, and the lower attachment plate 25 is fastened and fixed to the upper end of the lower pillar 2A.

FIG. 12 shows a twelfth embodiment of the present invention. The column-column joint structure of this embodiment is different from the eleventh embodiment (FIG. 10) in that the lower straight cylindrical portion 2 of the tapered tube 23 is provided.
The one-side bolt 6 used to join the upper end of the lower pillar 2A to the upper pillar 3c is replaced with a high-strength bolt 16. The lower end of the upper column 1A and the upper straight cylindrical portion 23b of the tapered tube 33 are connected to the one-side bolt 6 via the upper attachment plate 24.
The other components are the same as in the eleventh embodiment. In the case of this embodiment, the tapered cylinder 2
3 high-strength bolt 14 between lower straight portion 23c and lower column 2A
Is first performed at the factory, and the upper straight tube portion 23b of the tapered tube 23 and the upper column 1A are joined on site by the one-side bolt 6.

FIG. 13 shows a thirteenth embodiment of the present invention. The column / column joint structure of this embodiment is different from the eleventh embodiment (FIG. 10) in that the upper straight tube portion 2 of the tapered tube 23 is provided.
One-side bolt 6 used to join 3b and the lower end of upper column 1A is replaced with a high-strength bolt 16. The upper end of the lower column 2 </ b> A and the lower straight cylindrical portion 23 c of the tapered tube 23 are connected to the one-side bolt 6 via the lower attachment plate 25.
The other components are the same as in the eleventh embodiment.

FIG. 14 shows a fourteenth embodiment of the present invention. The column-column joint structure of this embodiment is different from the eleventh embodiment (FIG. 10) in that the lower straight cylindrical portion 2 of the tapered tube 23 is provided.
3c and the upper end of the lower column 2A are directly joined by welding 17 instead of being joined by bolts. The lower end of the upper column 1A and the upper straight cylindrical portion 23b of the tapered tube 23 are joined by the one-side bolt 6 via the upper attachment plate 24, and other configurations are the same as those of the eleventh embodiment. The lower straight cylindrical portion 23 of the tapered tube 23
For c, does not need the bonding margins of the lower subscript plate 25 may at the height of its extent the height H ₁ is capable of performing easily the welding, it may be, for example about 50mm.

FIG. 15 shows a fifteenth embodiment of the present invention. The column / column joint structure of this embodiment is different from the eleventh embodiment (FIG. 10) in that the upper straight tube portion 2 of the tapered tube 23 is provided.
3b and the lower end of the upper column 1A are directly joined by welding 17 instead of being joined by bolts. The upper end of the lower column 2A and the lower straight cylindrical portion 23c of the tapered tube 23 are joined by the one-side bolt 6 via the lower attachment plate 25, and other configurations are the same as those of the eleventh embodiment. It is. Again, the upper straight tubular portion 23b of the tapered tube 23, the bonding margins of the upper subscript plate 24 does not need, a height H ₂ may be about 50 mm.

FIG. 16 shows a sixteenth embodiment of the present invention. In the column-column joint structure of this embodiment, the lower end of the upper column 1A and the upper straight cylindrical portion 23b of the tapered tube 23 are connected to each other by the one-side bolt 6 via two upper and lower upper attachment plates 24 and 34 sandwiching these. At the same time, the upper end of the lower column 2A and the lower straight cylindrical portion 23c of the tapered tube 23 are joined by the one-side bolt 6 via two front and back lower attachment plates 25 and 35 sandwiching them. is there. The upper attachment plate 34 and the lower attachment plate 35 arranged on the back side are substantially the same arc-shaped plates as the upper attachment plate 24 and the lower attachment plate 25 arranged on the front side. Note that these attachment plates 34 and 35 are not shown in FIG.
As shown in (B) and (C), the radius of curvature of the outer diameter surface is made larger than the inner diameter surface of the corresponding upper and lower columns 1A and 2A and the upper and lower straight tube portions 23b and 23c of the tapered tube 23, and the upper and lower surfaces are increased with the bolt tightening. It is adapted to be adapted to the surfaces of columns 1A, 2A and the like.

FIGS. 17A and 17B show a seventeenth embodiment of the present invention.
The following shows an example. The column-column joint structure of this embodiment is used for joining the lower straight portion 23c of the tapered tube 23 and the upper end of the lower column 2A in the sixteenth embodiment (FIG. 16). The one-side bolt 6 is replaced with a high-strength bolt 16. Lower end of upper column 1A and tapered tube 23
Of the upper straight tube portion 23b and the upper and lower backing plates 24, 3
The connection with the one-side bolt 6 via 4 and other configurations are the same as those of the sixteenth embodiment.

FIGS. 17C and 17D show an eighteenth embodiment of the present invention.
The following shows an example. The column-column joint structure of this embodiment is the same as that of the sixteenth embodiment (FIG. 16) except that the tapered cylinder 23 is used.
The one-side bolt 6 used to join the upper straight cylindrical portion 23b of the upper column 1A and the lower end of the upper column 1A is replaced with a high-strength bolt 16
In place of Lower end of upper column 1A and tapered tube 2
3 and the upper straight cylindrical portion 23b,
The connection with the one-side bolt 6 via 34 and other configurations are the same as in the sixteenth embodiment.

FIG. 18 shows a nineteenth embodiment of the present invention. The column-column joint structure of this embodiment is similar to that of the sixteenth embodiment (FIG. 16) except that
3c and the upper end of the lower column 2A are directly joined by welding 17 instead of being joined by bolts. The lower end of the upper column 1A and the upper straight cylindrical portion 23b of the tapered tube 23 are joined by one-side bolts 6 via two upper and lower upper attachment plates 24 and 34, and other configurations are the first.
This is the same as in the sixth embodiment. The tapered tube 23
The lower straight cylindrical portion 23c of the so do not need the bonding margins of the lower subscript plate 25 and 35, the height H ₁ may be about 50 mm.

FIG. 19 shows a twentieth embodiment of the present invention. The column-column joint structure of this embodiment is different from the sixteenth embodiment (FIG. 16) in that the upper straight tube portion 2 of the tapered tube 23 is provided.
3b and the lower end of the upper column 1A are directly joined by welding 17 instead of being joined by bolts. The upper end of the lower pillar 2A and the lower straight cylindrical portion 23c of the tapered cylinder 23 are joined by one-side bolts 6 via two lower attachment plates 25 and 35 on the front and back, and other configurations are the first.
This is the same as the sixth embodiment. Also in this case, the tapered cylinder 23
The upper straight tubular portion 23b, the bonding allowance of the upper subscript plate 24, 34 does not need, a height H ₂ may be about 50 mm.

In the eleventh to twentieth embodiments, as shown in the plan view of FIG. 10 (B), the tapered cylinder 23 is a cylindrical body whose lower end opening and upper end opening are arranged concentrically. However, as shown in a plan view in FIG. 20, the lower straight tube portion 2 extends from the lower straight tube portion 23c to the tapered tube portion 23a and the upper straight tube portion 23b so that a part of these surfaces are aligned.
3c and a tapered tubular portion 23a and an upper straight tubular portion 23b.
May be used.

[0038]

According to the column-column joint structure of the different diameter steel pipe columns of the present invention, the joint between the upper and lower columns by the tapered cylinder is arranged in the middle between the upper beam and the lower beam, so that the structure can be simplified. It is easy to process and assemble, and the transmission of the force acting on the joint is simple and the quality control is also easy. Therefore, upper and lower columns with different pipe diameters can be easily joined with a simple structure,
It leads to cost reduction. In the case of the invention of claim 2, the upper and lower columns have a straight cylindrical portion having the same outer diameter as the upper and lower columns following the upper and lower portions of the tapered cylindrical portion, and the upper and lower columns having different pipe diameters are formed by bolting together with the attachment plate. Can be easily joined by welding. In the case of the invention of claim 3, one or both of the bolts on the straight cylinder portion side and the column side among the bolts joined by the attachment plate are one-side bolts. There is no need to perform welding or the like, and the joining operation is further facilitated. In the case of the invention of claim 4, since the tapered cylinder is a drawn product of a steel pipe, the joining cost can be reduced with a low member cost.

[Brief description of the drawings]

FIG. 1A is an exploded perspective view of a column-column joint structure according to a first embodiment of the present invention, FIG. 1B is a plan view of a tapered cylinder used in the joint structure, and FIG. It is a longitudinal cross-sectional view of a tapered cylinder.

FIG. 2A is a perspective view of the embodiment, and FIG. 2B is a front view showing a part of a steel frame of a building employing the embodiment.

FIG. 3 is a sectional view showing an example of use of a one-side bolt used in the embodiment.

FIG. 4A is an exploded perspective view of a column-column joint structure according to a second embodiment of the present invention, FIG. 4B is a horizontal cross-sectional view of a lower end joint portion of the tapered cylinder in the embodiment, and FIG. FIG. 3 is a horizontal sectional view of an upper end joint portion of the tapered cylinder.

FIG. 5A is an exploded perspective view of a column-column joint structure according to a third embodiment of the present invention, FIG. 5B is a horizontal cross-sectional view of the lower end joint of the tapered cylinder in the embodiment, and FIG. FIG. 3 is a horizontal sectional view of an upper end joint portion of the tapered cylinder.

FIGS. 6A and 6B are exploded perspective views of a column-column joint structure according to fourth and fifth embodiments of the present invention, respectively.

FIGS. 7A to 7D are partially cutaway front views of a column-column joint structure according to sixth to eighth embodiments of the present invention and modifications thereof, respectively.

FIGS. 8A and 8B are partially cutaway front views of a column-column joint structure according to ninth and tenth embodiments of the present invention, respectively.

FIGS. 9A and 9B are plan views showing modified examples of the tapered cylinders, and FIG. 9C is a plan view of a steel frame of a building in which the tapered cylinders of the modified examples are properly used.

FIG. 10A is an exploded perspective view of a column / column joint structure according to an eleventh embodiment of the present invention, and FIG. 10B is a plan view of a tapered cylinder used in the joint structure.

11A is a perspective view of the embodiment, FIG. 11B is a cutaway plan view showing the relationship between the attachment plate, the column and the tapered cylinder in the embodiment, and FIG. 11C is a cutaway view of FIG. It is a partial enlarged view.

12A is an exploded perspective view of a column-column joint structure according to a twelfth embodiment of the present invention, FIG. 12B is a horizontal cross-sectional view of the lower end joint of the tapered cylinder according to the twelfth embodiment, and FIG. FIG. 3 is a horizontal sectional view of an upper end joint portion of the tapered cylinder.

13A is an exploded perspective view of a column-column joint structure according to a thirteenth embodiment of the present invention, FIG. 13B is a horizontal cross-sectional view of the lower end joint of the tapered cylinder in the thirteenth embodiment, and FIG. FIG. 3 is a horizontal sectional view of an upper end joint portion of the tapered cylinder.

FIG. 14 is an exploded perspective view of a column / column joint structure according to a fourteenth embodiment of the present invention.

FIG. 15 is an exploded perspective view of a column / column joint structure according to a fifteenth embodiment of the present invention.

FIG. 16A is an exploded perspective view of a column-column joint structure according to a sixteenth embodiment of the present invention, and FIG. 16B is a broken plane showing the relationship between the attachment plate, the column, and the tapered cylinder in the embodiment. Figure,
FIG. 3C is a partially enlarged view of FIG.

17A and 17B are a horizontal cross-sectional view of a lower end joint of a tapered cylinder and a horizontal cross section of an upper end joint of the tapered cylinder in a column-column joint structure according to a seventeenth embodiment of the present invention; Figures (C) and (D) show pillars of an eighteenth embodiment of the present invention.
It is the horizontal sectional view of the lower end joining part of the taper-shaped cylinder in a pillar joining structure, and the horizontal sectional view of the upper end joining part of the same tapered cylinder.

FIG. 18 is a perspective view of a column / column joint structure according to an eighteenth embodiment of the present invention.

FIG. 19 is a perspective view of a column / column joint structure according to a nineteenth embodiment of the present invention.

FIG. 20 (A) is a perspective view of a column / column joint structure according to a twentieth embodiment of the present invention, and FIG. 20 (B) is a plan view showing each modification of the tapered cylinder.

FIG. 21 is a front view of a conventional example.

[Explanation of symbols]

1, 1A: Upper pillar, 2, 2A: Lower pillar, 3, 3A, 3
B, 23, 23A: tapered cylinder, 3a, 23a: tapered cylinder part, 3b, 3c, 23b, 23c: straight cylinder part, 4, 5,
14, 15, 24, 25, 34, 35 ... Attached plate, 6 ... One side bolt, 12 ... Upper beam, 13 ... Lower beam, 16 ...
High strength bolt, 17 ... welding

Claims (4)

(57) [Claims] 1. An upper column and a lower column each formed of a steel tube column are joined via a tapered cylinder having an upper end and a lower end having the same outer diameter as the upper column and the lower column. Column-column joint structure of steel pipe columns of different diameters, with the section located between the upper and lower beams. 2. The tapered cylinder has a straight cylindrical portion having the same outer diameter as the upper and lower columns following the upper and lower portions of the tapered cylindrical portion,
2. The column-column joint structure for a steel pipe column having a different diameter according to claim 1, wherein the upper straight tube portion and the lower straight tube portion are bolted to the upper and lower columns together with a supporting plate. 3. The bolt according to claim 2, wherein one or both of the bolts on the side of the straight tube portion and the column side are one-side bolts, of the bolts for joining the upper and lower straight tube portions and the column of the tapered tube with the attachment plate. Column-column joint structure of different diameter steel pipe columns. 4. The column-column joint structure for columns of different diameter steel pipes according to claim 1, wherein said tapered cylinder is a drawn product of a steel pipe.