JP2001271420A - Steel structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a steel structure connecting beam members without welding them. SOLUTION: A long square steel pipe 11 having a predetermined thickness t and a short square steel pipe 12 having a large thickness T and a length L and forming a beam member connection part have outer peripheral shapes formed into the same shape, and the short square steel pipe 12 is welded and connected in the direction of length using it as a beam member connection position. Holes 13A, 13B, 13C for connecting beam members are formed on at least one side plate 12A of the short square steel pipe 12 to constitute a square steel pipe column 10. A beam member 16 is connected with the short square steel pipe 10 by connecting a bracket 17 for connecting a lower part connected with a lower face of the beam member 16, a bracket 18 for connecting a side part connected with a side face of the beam member 16, and a bracket 19 for connecting an upper part connected with an upper face of the beam member 16 with the short square steel pipe 12 by a connection device 21 utilizing the holes 13A, 13B, 13C.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel structure in which, for example, a square steel tubular column is used as a column.

[0002]

2. Description of the Related Art Conventionally, as a method of attaching a diaphragm to a column side, for example, a through-diaphragm system and an inner diaphragm system have been provided.

[0003] In the through-diaphragm system, for example, as shown in Fig. 9, a column is cut (divided) into a lower column 31, a panel zone column 32, and an upper column 33 in the longitudinal direction thereof. . And lower strut 3
A lower diaphragm 34 is welded to the upper end of 1 via a backing material, and a lower end of the column 32 is welded to the lower diaphragm 34 via a backing material. Further, an upper diaphragm 35 is welded to the upper end of the column 32 via a backing material.
The lower end of the upper support 33 is welded onto the base 5 via a backing material.

The beam (mainly H-shaped steel) 37 is connected to the column 36 thus formed by welding the free end of the beam 37 to both the diaphragms 34, 35 and the column 32. I was And both diaphragms 34, 3
No. 5 served to transmit the stress.

The inner diaphragm system is, for example, shown in FIG.
As shown at 0, the strut is cut (divided) into a lower strut 41 and an upper strut 42 in its length direction. A diaphragm 43 is welded to an upper portion of the lower support 41 and a lower portion of the upper support 42 via a backing material. These lower support 41 and upper support 4
2 is positioned linearly and then welded between its free ends.

The connection of the beam 45 to the column 44 thus formed is performed by setting the free end of the beam 45 to the upper and lower diaphragms 41 with the free end of the beam 45 facing the upper and lower diaphragms 43. This was done by welding.

[0007]

According to the above-described conventional structure, according to the through-diaphragm system shown in FIG. 9, the column (square steel pipe) 36 is cut short and beveled for welding. Both diaphragms 3
Nos. 4, 35 weld two upper and lower locations, respectively, a total of four locations, so that the number of assembling steps is large and the welding length is long, which complicates the entire operation and increases the production cost.

Further, according to the inner diaphragm system shown in FIG. 10, the welding of the two diaphragms 43 and the welding of the lower support 41 and the upper support 42 require a total of three weldings. The man-hours are large and the welding length is long, which complicates the whole work and increases the production cost. Further, the diaphragm 43 can be disposed only near the end of the lower support 41 and the upper support 42, and the beam 45 is welded to the lower support 41 and the upper support 42 by straddling the welded joint 46. , The support 44,
It was cut short according to the connection position of the beam member 45, and could not be formed as a long single pillar.

Further, in both types, the beams 37 and 45 must be welded to the columns 36 and 44, and the welding length complicates the entire operation and increases the manufacturing cost. After the welding connection, a welding inspection had to be performed, which was troublesome.

[0010] In addition, there is another outer diaphragm system,
According to this, the structure outside the column becomes large and heavy,
Moreover, the welding length is long. Accordingly, an object of the present invention is to provide a steel structure capable of joining beams without welding.

[0011]

In order to achieve the above-mentioned object, a steel structure according to claim 1 of the present invention comprises:
A long rectangular steel pipe having a predetermined plate thickness, and a short rectangular steel pipe having a thickness greater than that of the long rectangular steel pipe and a length forming a beam connecting portion, having the same outer peripheral shape, The short rectangular steel pipe is welded in the longitudinal direction as a beam connecting position, and at least one side plate of the short rectangular steel pipe is formed with a hole for beam connection to form a square steel pipe column, and the short rectangular steel pipe is formed. The connection of the beam material to at least one side plate of the beam material is connected to the lower connection bracket connected to the lower surface of the beam material, the side connection bracket connected to the side surface of the beam material, and the upper surface of the beam material. An upper connection bracket is connected to a short rectangular steel pipe by a connection tool using the hole.

Therefore, according to the first aspect of the present invention, a long rectangular steel pipe is welded to both ends of a short rectangular steel pipe,
Since the beam material connecting portion can be formed by the short rectangular steel pipe, and only two weldings are required at that time, the number of assembling steps can be reduced and the welding length is shortened. Further, the long steel pipe and the short steel pipe can be welded to each other in the longitudinal direction by setting the outer peripheral shape to the same shape (similar outer dimensions, similar curvature radius).

In particular, the beam connecting portion can secure sufficient strength by previously thick plate of the short rectangular steel pipe, and uses a sufficiently long beam connecting hole formed in this thick plate. Thus, the connection of the beam member to the square steel pipe column via the bracket group can be performed firmly without welding.

According to a second aspect of the present invention, there is provided the steel frame structure according to the first aspect, wherein a hole for connecting the beam is formed in a screw hole.
Therefore, according to the second aspect of the present invention, the connection of the beam member to the square steel tubular column is performed by screwing the screw bolt group into the screw hole group having a sufficient thickness and having a sufficient length to form a sufficient screw length. It can be done firmly.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
A description will be given based on FIG.

As shown in FIGS. 6 and 7, a semi-formed rectangular steel pipe 1 having a predetermined thickness t and each corner formed to have a large radius of curvature R; A semi-formed short rectangular steel pipe 2 having a plate thickness T larger than the plate thickness t and a corner radius similarly formed to a large radius of curvature R is prepared. At that time, the semi-formed long rectangular steel pipe 1 and the semi-formed short rectangular steel pipe 2 have butt-welded portions 1a and 2a formed by butt welding on one flat portion thereof, and have a slightly longer outer dimension W + α. It is semi-formed. Further, the semi-formed short rectangular steel pipe 2 has a length (height) L forming a beam connecting portion.

Here, the predetermined thickness t is determined by the outer dimension W of the steel pipe column adopted according to the scale of the steel structure. For example, when the outer dimension W is 600 mm, the thickness t is determined. Is 25 mm. The thickness t of the semi-formed long rectangular steel pipe 1 and the thickness T of the semi-formed short rectangular steel pipe 2 are, for example, 2t.
≒ T. The semi-formed long rectangular steel pipe 1 and the semi-formed short rectangular steel pipe 2 each have a large radius of curvature R
And a slightly longer outer dimension W + α, the outer peripheral shape of which is larger than the final product shape (square steel tubular column) and is formed in the same shape.

The semi-formed long rectangular steel pipe 1 and the semi-formed short rectangular steel pipe 2 are positioned so that their outer peripheral shapes are the same and the butt welds 1a and 2a are the same straight line. Then, the semi-formed rectangular steel tube 1 and the semi-formed rectangular steel tube 2 are welded and connected 3 to each other, thereby forming the semi-shaped rectangular steel tube column 5 with the semi-shaped rectangular steel tube 2 as a beam connecting position. .

Here, step portions 2b are formed on the inner surfaces at both ends of the semi-formed rectangular steel tube 2 to adjust the thickness to the plate thickness t of the semi-formed rectangular steel tube 1. When the welding connection 3 is performed, a ring-shaped flat bar 4 is set inside the welding location by using the stepped portion 2b as necessary (see FIG. 1). When the flat bar 4 is not used, welding connection from inside and outside is adopted.

Next, hot forming (shaping) is performed on the semi-formed square steel pipe column (raw steel pipe) 5 having a large radius of curvature R. That is, the semi-formed square steel pipe column 5 is a heating means (heating furnace, etc.).
Heated at 8 and hot formed (hot drawn) in forming means (such as a forming roll device) 9.

By hot forming the outer peripheral shape in this manner, the desired outer dimension W is obtained over the entire length, the respective corners have the same radius of curvature r, and a long rectangular shape having a predetermined plate thickness t. A rectangular steel pipe column 10 formed by welding and joining a steel pipe 11 and a short rectangular steel pipe 12 forming a beam connecting portion having a large plate thickness T in the longitudinal direction, that is, the outer peripheral shape is the final product shape. Thus, a rectangular steel tube column 10 is obtained.

As shown in FIG. 5, in such a rectangular steel pipe column 10, screw holes for connecting beam members (an example of holes for connecting beam members) are formed in each side plate 12A of the short rectangular steel tube 12, as shown in FIG.
Is formed. Here, the screw holes are formed by lower screw holes 13A formed at one lower position (or plural positions) and four horizontal positions (single or plural positions), and two vertical positions (single positions) at an intermediate portion. (Or multiple locations) and two intermediate rows of screw holes (single row or multiple rows), and four upper (one or multiple) and four horizontal locations (single or multiple locations). And the upper screw hole 13C formed at the position.

The rectangular steel tubular column 10 constructed as described above
Is transported to a construction site, etc., and
As shown in FIG. 4, a beam 16 is connected to the outer surface of a short rectangular steel pipe 12 having a length L forming a beam connecting portion via a connecting member.

That is, at the end of the beam 16 made of an H-shaped steel material, a group of vertically lower through holes 16a is formed in a lower flange portion thereof, and a group of transverse intermediate through holes 16b are formed in a web portion thereof. The upper flange portion is formed with a group of upper through holes 16c in the vertical direction. Also, a lower connecting bracket 1 made of an L-shaped steel material.
7, a side connection bracket 18, and an upper connection bracket 19 are prepared, and these brackets 17, 18, 19 are provided.
, A group of column-side through holes 17A, 18B, and 19C and a group of beam-side through holes 17a, 18b, and 19c are formed in the plate portion.

Then, the lower connecting bracket 17 is brought into contact with the lower surface of the lower flange portion of the beam member 16, and a bolt nut (an example of a connecting tool) 20 is provided between the communicated lower through hole 16 a and the beam side through hole 17 a. To act on the beam 16
Is connected to the lower connection bracket 17.

Also, the side connecting bracket 18 is brought into contact with the side surface of the web portion, and the bolt nut 20 is acted between the lower through hole 16b and the beam side through hole 18b which are communicated with each other. The side connection bracket 18 is connected. Further, the upper connecting bracket 19 is brought into contact with the upper surface of the upper flange portion, and the upper through hole
The upper connection bracket 19 is connected to the beam 16 by applying the bolt and nut 20 between c and the beam side through hole 19c. And each bracket 17, 18, 19
Column side through-holes 17A, 18B, and 19C are square steel tube columns 1
In a state where the screw holes 13A, 13B, and 13C are aligned (communicated) with the screw holes 13A, 13B, and 13C, a group of screw bolts (an example of a connecting tool) 21 that is passed from the outside to the column-side through holes 17A, 18B, and 19C includes the screw holes 13A. , 13B, 13C, and the beam 16 is fastened to the square steel pipe 12 of the square steel pipe column 10 via the brackets 17, 18, 19, etc. by tightening.
Is connected to the outer surface. At that time, the order of connection is arbitrarily performed.

As shown by the imaginary line in FIG. 2, the square steel pipe columns 10 are arranged in a stack, and then welded 3 between their upper and lower parts to form a predetermined length (height). Is done.

The square steel tubular column 1 of the first embodiment described above
According to 0, a long rectangular steel pipe 1 is provided at both ends of a short rectangular steel pipe 12.
By welding 3 to 1, a beam connecting portion can be formed by this short rectangular steel pipe 12. Therefore, since welding at two locations is sufficient, the number of assembling steps can be reduced, and the welding length is shortened.
In addition, welding distortion and the like hardly occur. Further, the long rectangular steel pipe 11 and the short rectangular steel pipe 12 have the same outer peripheral shape (similar outer dimensions W, similar radius of curvature r), and are welded and connected 3 in the longitudinal direction with a substantial contact therebetween. The weld connection 3 can be made sufficiently strong and clean.

Further, the beam connecting portion can secure sufficient strength by the previously thick plate thickness T of the short rectangular steel pipe 12, and the screw holes 13A, 13 of sufficient length formed in this thick plate thickness T are provided.
By screwing a group of screw bolts 21 into groups B and 13C,
Beam 16 via each bracket 17, 18, 19, etc.
Can be securely connected with a sufficient screw length. Moreover, the connection of the beam member 16 to the rectangular steel pipe column 10 can be performed without welding by screwing and tightening the group of bolts and nuts 20 and the group of screw bolts 21 via the brackets 17, 18, and 19. Then, the square steel pipe column 10 is obtained in the form of a pipe joint, and can be finished without built-in ribs or backing metal. Therefore, a configuration in which concrete or the like is filled therein can be easily adopted.

Each of the brackets 17, 18, and 19 may be of a type provided with a rib 28, for example, as shown by a virtual line in FIG. Then, by performing hot forming on the semi-formed square steel pipe column 5 after performing the welding connection 3, the welding is integrated with the base material (semi-formed long rectangular steel pipe or semi-formed short rectangular steel pipe). It has excellent plastic deformation performance and can prevent brittle fracture. Furthermore, by performing hot forming on the semi-formed square steel pipe column 5, the outer surface radius of curvature r of each corner is sharpened and aligned over its entire length, and the butt welds 1a and 2a remain straight without being inclined. It is possible to manufacture a square steel pipe column 10 in which deformation such as the following does not occur. Furthermore, the square steel pipe column 10 in which the flat portion and the corner portion are homogenized can be manufactured by hot forming.

Next, a second embodiment of the present invention will be described with reference to FIG.
It will be described based on. Each side plate 1 of the short rectangular steel pipe 12
In 2A, groups of through holes for connecting beam members (another example of holes for connecting beam members) 22A, 22B, and 22C are formed. The column-side through-holes 17 are formed in the through-holes 22A, 22B, and 22C.
In a state where the groups A, 18B, and 19C are matched (communicated), the hack bolts (another example of the connection tool) 23 that are passed from the outside to the column-side through holes 17A, 18B, and 19C are the through holes 22A and the through holes 22A.
The beam member 16 is passed through the brackets 17, 18, 19, etc. by being passed through the groups 22B and 22C, whereby the locking portion 23a of the hack bolt 23 is projected and locked on the inner surface side of the side plate 12A. The rectangular steel pipe column 10 is connected to the outer surface of the short rectangular steel pipe 12. The through holes 22A, 22B,
In the case of 22C, connection by rivets is also possible. 24
Indicates a washer.

In both of the above-described embodiments, the rectangular steel tubular column 10 may be either a cold-formed product or a hot-formed product. In both of the above-described embodiments, screw holes 13A, 13A are formed in each side plate 12A of the short rectangular steel pipe 12.
13B, 13C and the through holes 22A, 22B, 22C are formed. Depending on the use location of the rectangular steel tube column 10, three of the four side plates of the short rectangular steel tube 12 are used.
A screw hole 13A, 13B, 13C or a through hole 22A, 22B, 22C is formed in the side plate 12A of the side, and the screw hole 13A, 1 is formed in the side plate 12A of two sides located on both sides of the corner.
3B, 13C and the form in which the through holes 22A, 22B, 22C are formed may be used. Further, a combination type in which a beam member 16 is connected to some of the side plates 12A by an outer diaphragm type may be used.

In the above embodiments, the square steel pipe may be, for example, a one-seam square steel pipe formed by roll forming, a two-seam square steel pipe formed by butt-welding a pair of grooves formed by press forming, or a pair of rolled grooves. In each case, an off-the-shelf square steel pipe is used, such as a two-seam square steel pipe formed by welding a pair of rolled angle steels, and a two-seam square steel pipe formed by welding a pair of rolled angle members facing each other.

In the above-described embodiments, the square steel tubular column 1
A square steel tubular column having a square cross section is adopted as 0, but a rectangular steel tubular column having a rectangular cross section can be similarly employed. Further, the present invention can be similarly applied to various polygonal rectangular steel pipe columns such as a regular pentagon and a regular hexagon.

In both embodiments described above, welding is performed by an electroslag welding machine or an electrogas arc welding machine, and according to this, high-quality welding can be performed in a short time. Note that another welding method such as a laser may be used.

[0036]

According to the first aspect of the present invention, by connecting the long steel pipe to both ends of the short steel pipe by welding, the beam connection portion can be formed by the short steel pipe. Therefore, the number of assembling steps can be reduced and the welding length can be shortened, whereby the whole can be simplified and economical, and welding distortion and the like can be suppressed. In addition, the long steel pipe and the short steel pipe have the same outer peripheral shape and are welded and joined in a lengthwise direction at substantially corresponding intervals, so that the welded connection can be performed sufficiently firmly and neatly.

In particular, the beam connecting portion can secure sufficient strength by previously thick plate of the short rectangular steel pipe, and uses a sufficiently long beam connecting hole formed in this thick plate. Thus, the connection of the beam to the square steel pipe column via the bracket group can be performed firmly and without any trouble without welding. Therefore, welding at the time of connecting the beam members can be made unnecessary, whereby the whole can be simplified and made economical, welding distortion can be hardly generated, and welding inspection and the like can be made unnecessary.

According to the second aspect of the present invention,
The connection of the beam material to the square steel tubular column can be made firmly with a sufficient screwing length by screwing a screw bolt group into a screw hole group with a sufficient length formed in a thick plate. it can.

[Brief description of the drawings]

FIG. 1 shows a first embodiment of the present invention and is a longitudinal sectional front view of a main part of a steel structure.

FIG. 2 is a vertical sectional front view of the steel structure.

FIG. 3 is a partially cutaway perspective view of the steel structure.

FIG. 4 is a cross-sectional plan view of the steel structure.

FIG. 5 is a partially cutaway perspective view of a square steel tubular column in the steel structure.

FIG. 6 is a partially cutaway perspective view of a square steel tubular column in the steel structure before welding connection.

FIG. 7 is an explanatory diagram of hot forming of a square steel tubular column in the steel structure.

FIG. 8 is a longitudinal sectional front view of a main part of a steel structure, showing a second embodiment of the present invention.

FIG. 9 shows a conventional example, and is a partially cutaway perspective view of a steel structure.

FIG. 10 shows another conventional example, and is a partially cutaway perspective view of a steel structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Semi-formed long rectangular steel pipe 2 Semi-formed short rectangular steel pipe 3 Welded joint 5 Semi-formed rectangular steel pipe column 8 Heating means 9 Forming means 10 Square steel pipe column 11 Long rectangular steel pipe 12 Short rectangular steel pipe 12A Side plate 13A Lower screw hole (beam material) Connection hole) 13B Middle screw hole (beam connection hole) 13C Upper screw hole (beam connection hole) 16 Beam material 16a Lower through hole 16b Middle through hole 16c Upper through hole 17 Lower connection Bracket 17A Column side through hole 17a Beam side through hole 18 Side connection bracket 18B Column side through hole 18b Beam side through hole 19 Upper connection bracket 19C Column side through hole 19c Beam side through hole 20 Bolt nut (connector) 21 Screw bolt (connecting tool) 22A Through hole (hole for beam connection) 22B Through hole (hole for beam connection) 22C Through hole (hole for beam connection) 23 Hack Belt (connector) 23a engaging portion t long RHS of thickness T outer dimension r steel column a radius of curvature of the short rectangular length to form a plate thickness L beam members connecting portion of the steel pipe W RHS Column

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Taku Nakajima 3-10-11 Kashima, Yodogawa-ku, Osaka-shi, Osaka Inside Nakajima Steel Pipe Co., Ltd. (72) Isao Nakajima 3--10 Kashima, Yodogawa-ku, Osaka-shi, Osaka No. 111 Nakajima Pipe Co., Ltd. F-term (reference) 2E125 AA04 AA14 AB01 AB16 AC15 AC16 AG03 AG04 AG12 AG14 AG32 AG41 BB08 BB11 BB22 BB35 BC08 BD01 BE06 BE08 BF06 CA03 CA05 CA14

Claims (2)

[Claims] An elongated rectangular steel pipe having a predetermined thickness and a rectangular steel pipe having a thickness greater than that of the elongated rectangular steel pipe and forming a beam connecting portion have the same outer peripheral shape. In addition, the short rectangular steel pipe is welded in the longitudinal direction as a beam connecting position, and at least one side plate of the short rectangular steel pipe is formed with a hole for beam connection to form a square steel pipe column. Connecting the beam material to at least one side plate of the short rectangular steel pipe, a lower connection bracket connected to a lower surface of the beam material, a side connection bracket connected to a side surface of the beam material, A steel structure, wherein an upper connection bracket connected to an upper surface is connected to a short rectangular steel pipe by a connection tool using the hole. 2. The steel structure according to claim 1, wherein the holes for connecting the beam members are formed in screw holes.