JP2000096707A - Connection method of steel pipe column and steel frame beam, and diaphragm therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connection method of a steel column pipe and a steel frame beam and a diaphragm used for the method which reduces welding works and which is inexpensive. SOLUTION: A column-beam connection part joining steel frames beam provided with flanges and webs to a steel pipe column, is provided with through holes 4a, 5a having nearly the same shape with the external sectional shape of the steel pipe column 1. The upper and lower diaphragms 4, 5 formed of a single plate are inserted in the steel pipe column 1. Both members are connected by intermittent welding or partial penetration welding, and the upper flange 2a of the steel frame beam 2 is partly cut out. Then, the lower flange 2b is put on the lower diaphragm 5 and arranged so that the end of the cut out upper flange 2a is butted against each other opposite to the upper diaphragm 4. The splice plates 10 are laid astride both upper faces to fix the upper and lower diaphragms 4, 5 and the upper and lower flanges 2a, 2b of the steel frame beams 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint for joining a column and a beam, and more particularly to a steel tube column for joining a steel beam column having a flange and a web to a steel tube column by using a diaphragm. The present invention relates to a method of joining steel beams to steel beams and a diaphragm used in the method.

[0002]

2. Description of the Related Art Conventionally, in a steel structure, a tubular steel tube column 1 having a hollow inside such as a box column is used as a column member, and the steel tube column 1 has flanges 2a and 2a.
There is a ramen frame that connects steel beams 2 formed of a steel material provided with a web 2b and a web 2c. As shown in FIG. 5, a method of joining the steel tube column 1 and the steel beam 2 having such a rigid frame structure is as follows: four steel plates are added to a portion of the steel tube column 1 where the flanges 2a and 2b of the steel beam beam 2 are to be joined. It is known to dispose diaphragms 4 and 5 forming an octagon by welding at four corners of a column and joining the diaphragms 4 and 5 to a flange of the steel beam 2. That is, the inner diameters of the diaphragms 4 and 5 and the surface of the steel pipe column 1 are welded and joined over the entire circumference, and furthermore, the ribs 12 connecting the surface of the steel pipe column 1 and the joined portions of the diaphragms 4 and 5 are welded and connected. The diaphragms 4, 5 and the upper and lower surfaces of the flanges 2a, 2b of the steel beam 2 are connected together with the splice plate 10 by bolts. In addition, a bracket is provided on a column at a portion where the web 2c of the steel beam 2 is to be joined, and the web 2c of the steel beam 2 is fastened to the bracket together with a splice plate by a bolt.

[0003]

However, in the conventional method of joining a steel pipe column and a steel beam, a diaphragm in which a plurality of steel plates are welded together is used. There is a possibility that breakage is likely to occur at the joint portion of the above, which may cause damage or damage to the building. Also,
The strength of the diaphragm itself is weak, so it takes a lot of man-hours due to the frequent use of welding, such as welding using a rib to join the steel pipe column, or welding the entire circumference of the steel pipe column that contacts the diaphragm over the entire circumference. At the same time, the production of the steel frame becomes complicated and the efficiency is low. Furthermore, the need for joining members such as ribs increases the unnecessary weight, the building frame itself becomes heavy, and the cost of materials, work, and installation increases, and the construction cost of the building rises. there were.

Accordingly, the present invention has been made in view of the above-mentioned conventional problems, and reduces the amount of welding work at the joint between a steel pipe column and a steel beam, as well as a method for joining an inexpensive steel pipe column and a steel beam, and a method for joining the steel beam and the steel beam. It is an object to provide a diaphragm used in the method.

[0005]

In order to achieve the above object, a method for joining a steel pipe column and a steel beam according to the present invention is to provide a steel beam having a flange and a web on a steel pipe column. In the beam-to-column connection part to be joined, a diaphragm made of a single plate having a through-hole having substantially the same cross-sectional shape as the steel pipe column is inserted into the steel pipe column, and the diaphragm is intermittently welded to the steel pipe column. Partial penetration welding was performed to join a flange of a steel beam to the diaphragm. In addition, intermittent welding is welding in which the welded part is divided in the direction of the welding line, and partial penetration welding is welding in which the penetration part is intentionally made smaller than the base material thickness on the weld cross section. Say.

According to a second aspect of the present invention, there is provided a method for joining a steel pipe column and a steel beam, wherein the upper flange of the steel beam is cut out by a predetermined length, the flange end is abutted against the diaphragm, and the splice plate is mounted. It was configured to be joined via

According to a third aspect of the present invention, there is provided a method for joining a steel pipe column and a steel beam, wherein the lower flange of the steel beam is overlapped on the upper surface of the diaphragm and joined.

The diaphragm used in the joining method according to claim 4 of the present invention is a diaphragm used for joining a steel pipe column and a plurality of steel beams including a flange and a web, wherein the steel pipe column is used. And a single plate having a through hole having substantially the same shape as the cross-sectional outer shape.

According to the first aspect of the present invention, the diaphragm used for joining the steel pipe column and the steel beam is a single plate having a through-hole having substantially the same shape as the cross-sectional profile of the steel pipe column. Since the diaphragm is made of one member and does not have a joint, and the load from the steel beam is received by the entire diaphragm, stress is not concentrated and the diaphragm is less likely to be damaged or broken.

[0010] Further, even at the joint portion where the diaphragm is inserted through the steel pipe column and welded, the load from each steel beam is not received at the individual joint portion unlike the divided diaphragm,
Since the entire diaphragm is dispersed and received, the stress at the joint is small, so that not only a reinforcing member such as a rib is not required, but also the number of welding points can be reduced.

Furthermore, since the method of joining the steel pipe column and the diaphragm is intermittent welding or partial penetration welding, the outer periphery of the steel pipe column and the diaphragm can be welded very easily because they are joined.

According to the second aspect of the present invention, since the upper flange of the steel beam is joined to the diaphragm having a notch of a predetermined length by a splice plate, the steel beam member can be reduced in size and weight. At the same time, manufacturing errors can be easily absorbed, and the steel frame can be easily constructed.

Further, according to the present invention, since the lower flange of the steel beam is put on the upper surface of the diaphragm and joined, the flange of the steel beam is in surface contact with the diaphragm, and the diaphragm supports the steel beam from below. As compared with the case where the flanges and the diaphragms are butted and joined, a high-strength building frame with a large load resistance can be formed. Further, since a splice plate is not required, the number of members is reduced, the weight can be reduced, and the steel beam can be received at the time of steel frame construction, the mounting work becomes easy, and the construction cost can be reduced.

According to the fourth aspect, since the diaphragm used for joining the steel pipe column and the steel beam is formed of a single plate, the joining operation is not required as compared with the case where a plurality of members are joined, so that the number of working steps is reduced. The processing is easy, the strength of the diaphragm itself is high, and the attachment to the steel pipe column is easy.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a steel beam end stiffening structure according to the present invention will be described below in detail with reference to the accompanying drawings. 1 and 2 show a first embodiment of the present invention. FIG. 1 is a perspective view showing a joint between a steel pipe column and a steel beam, and FIG. 2 is an exploded view showing a configuration of a joint between the steel pipe column and a steel beam. It is.

The joint portion between the steel pipe column and the steel beam to which the joining method of the present invention is applied is a four-piece steel tube column 1 having a substantially square cross section and having flanges 2a, 2b and a web 2c. The steel beam 2 is a beam-to-column connection part of a middle column welded to each surface, and the steel pipe column 1 is vertically connected at a position where the upper and lower flanges 2a, 2b of the steel beam 2 are joined. The diaphragms 4 and 5 to be formed are intermittently welded or partially penetration welded to the steel pipe column 1. The diaphragms 4 and 5 have an octagonal shape, and have through holes 4a and 5a having the same cross-sectional outer diameter shape as the steel pipe column 1 and small holes 4b, 4b... 5b are the through holes 4a,
It is provided in four directions from 5a, and the steel pipe column 1 is inserted into the through holes 4a, 5a and is intermittently welded or partially penetration welded. Further, the upper and lower diaphragms 4 and 5 are configured such that when the lower flange 2 b of the steel beam 2 is placed on the lower diaphragm 5, the upper surface of the upper flange 2 a of the steel beam 2 and the upper surface of the upper diaphragm 4 are connected. It is welded and joined at the same horizontal plane.

Further, between the pair of diaphragms 4 and 5 on the surface of the steel pipe column 1, a right angle with the surface of the steel pipe column 1 is provided.
The L-shaped bracket 6 is bolted or welded so as to form a vertical plane. A small hole 6 for fixing the web 2c of the steel beam 2 is provided in a vertical plane of the bracket 6.
a is provided. Further, the bracket 6 is provided such that the distance between the lower end and the lower diaphragm 5 is wider than the thickness of the lower flange 2 b of the steel beam 2, and the steel beam 2 to be joined is located at the center of the steel pipe column 1. If you place
The side of the web 2c of the steel beam 2 contacts the side of the bracket 6,
The fixing small holes 2d and 6a provided on both sides are provided so as to overlap.

On the other hand, when the upper flange 2a of the steel beam 2 is arranged at the joint position with the steel pipe column 1, the web is formed so that the end of the upper flange 2a and one side of the upper octagonal diaphragm 4 face each other. 2c are cut out together with a part of the small holes 4b, 4b for fixing bolts provided on the diaphragm 4.
Small holes 2d are provided so as to be continuous with b. Also, the lower flange 2b and the web 2c are in contact with the diaphragm 5 and the bracket 6, respectively, and are provided with small holes 5b, 5b,..., 6a, 6a,.
A small hole is provided at a position overlapping with.

The method of joining the steel pipe column 1 and the steel beam 2 is as follows.
The lower flange 2b of the steel beam 2 is placed on the steel beam 2, the web 2c of the steel beam 2 is brought into contact with the bracket 6 provided on the steel pipe column 1, and the end of the upper flange 2a of the steel beam 2 is butted against one side of the upper diaphragm 4. You. Then, the lower flange 2b, the lower diaphragm 5, and the web 2c of the steel beam 2 and the bracket 6 which are superimposed are fastened with the bolt.

Next, a splice plate 10 is passed across the upper surface of the joint between the upper flange 2a of the steel beam 2 and the upper diaphragm 4 so as to straddle the two, and the upper flange 2a and the upper diaphragm 2 of the splice plate 10 and the steel beam 2 are connected. 4 with bolts.

In the present embodiment, the diaphragm 4,
Although the shape of No. 5 is an octagon, the shape is not limited to this, and may be a substantially quadrilateral as shown in FIG. 3 or another shape as long as it has through-holes 4 a and 5 a having a cross-sectional outer shape of the steel pipe column 1. Good.

As another embodiment of the joining method, as shown in FIGS. 3 and 4, the steel beam 2 is interposed between the upper and lower diaphragms 4 and 5, and the upper diaphragm 4 and the steel beam 2 are interposed.
Upper flange 2a and lower diaphragm 5 and steel beam 2
May be combined with a method of bolting the lower flange 2b to the lower flange 2b.

Further, in the above embodiment, the joints between the diaphragms 4 and 5 and the steel beam 2 are all bolted.
All may be welded, or bolted and welded may be combined.

In the method for joining a steel pipe column and a steel beam according to the present embodiment with the above configuration, the steel pipe column 1 and the steel beam 2
The diaphragms 4 and 5 used for joining with a single plate are formed,
In the center thereof, through holes 4 and 5 having the same cross-sectional outer diameter shape as steel pipe column 1 are provided.
Provided, the diaphragms 4 and 5 are made of one member and have no joint, and the load from the steel beam 2 is
Since the receiving stress does not concentrate in the entire diaphragm 5, the diaphragm 4,
5 is hardly damaged or broken.

Further, at the joint 2 with the steel pipe column 1,
Unlike the divided diaphragm, the load from each steel beam 2 is not received by the individual joints, but is dispersed and received by the entire diaphragms 4 and 5, so that the stress applied to the joints is reduced,
Not only does not require a reinforcing member such as a rib, but also the number of welding points can be reduced.

Furthermore, since the steel pipe column 1 and the diaphragms 4 and 5 are intermittently welded or partially penetration-welded, continuous and complete penetration welding between the outer periphery of the steel pipe column 1 and the diaphragms 4 and 5 is performed over the entire circumference. Unlike conventional methods, welding can be performed very easily.

The joint of the steel beam 2 with the upper flange 2a of the steel pipe column 1 is cut out together with a part of the web 2c, and the end of the flange 2a is arranged so as to face and contact one side of the diaphragm 4. Since the joint portion is joined via the splice plate 10, the steel beam member can be reduced in size and weight, and the steel frame manufacturing error can be absorbed.

Further, since the lower flange 2b of the steel beam 2 is put on the upper surface of the diaphragm 5 and joined, the lower flange 2b of the steel beam 2 comes into surface contact with the diaphragm 5, and the diaphragm 5 supports the steel beam 2 from below. Therefore, compared with the case where the flange of the steel beam 2 and the diaphragm are joined by butt, it is possible to form a high-strength building frame with a large load resistance. Further, since the splice plate 10 is not required, the number of members is small, the weight can be reduced, and the steel beam can be received by the lower diaphragm at the time of steel frame construction, the mounting work becomes easy, and the construction cost can be reduced. .

Further, since the diaphragms 4 and 5 used for joining the steel pipe column 1 and the steel beam 2 are formed of a single plate, the joining operation is not required as compared with a case where a plurality of members are joined, so that the number of working steps is reduced. The strength of the diaphragms 4 and 5 is high, and the mounting to the steel pipe column 1 is easy.

[0030]

As described above, the diaphragm used for joining the steel pipe column and the steel beam beam according to the first aspect of the present invention is a single plate having a through hole having substantially the same shape as the cross-sectional profile of the steel pipe column. The diaphragm is made of one member and has no joint,
Since the load from the steel beam is received by the entire diaphragm, stress is not concentrated and breakage or destruction of the diaphragm hardly occurs,
The durability of the building can be greatly improved.

Further, even at the joint portion where the diaphragm is inserted into the steel tube column and welded, the load from each steel beam is not received at the individual joint portion as in the case of the divided diaphragm.
Since the entire diaphragm is dispersed and received, the stress at the joint is small, not only does not require a reinforcing member such as a rib, but also the number of welding points can be reduced, and the working time can be reduced.

Furthermore, since the joining method between the steel pipe column and the diaphragm is intermittently welded or partially penetration welded, the entire periphery between the outer periphery of the steel pipe column and the diaphragm is not continuously and completely penetration-welded, but intermittently. By performing welding or partial penetration welding, welding can be performed extremely easily, so that work can be performed efficiently, and the construction period can be shortened and the construction cost can be significantly reduced.

According to the second aspect of the present invention, since the upper flange of the steel beam is cut out to a predetermined length and butted against the diaphragm and joined via the splice plate, the steel beam member can be reduced in size and weight, so that the member can be easily transported. It is. Further, since a splice plate is used, manufacturing errors can be absorbed.

Further, according to the third aspect, the lower flange of the steel beam is put on the upper surface of the diaphragm and joined, so that the flange of the steel beam is in surface contact with the diaphragm, and the diaphragm supports the steel beam from below. As compared with the case where the flanges and the diaphragms are butted and joined, a high-strength building frame with a large load resistance can be formed. In addition, since a splice plate is not required, the number of members is reduced and the weight is reduced, which not only reduces construction costs, but also allows the steel beam to be received by the lower diaphragm when constructing the steel frame, making it easier to position the members. Efficiency is also greatly improved.

According to the fourth aspect of the present invention, since the diaphragm used for joining the steel pipe column and the steel beam is formed of a single plate, the joining operation is not required as compared with a case where a plurality of members are joined, so that the number of working steps is reduced. In addition to being easy to process, the diaphragm itself has high strength and can be easily attached to a steel pipe column.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a method for joining a steel pipe column and a steel beam according to the present invention and a diaphragm used in the method.

FIG. 2 is an exploded view of FIG.

FIG. 3 is a perspective view showing a second embodiment of a method for joining a steel pipe column to a steel beam and a diaphragm used in the method according to the present invention.

FIG. 4 is a perspective view showing a third embodiment of a method for joining a steel pipe column and a steel beam according to the present invention and a diaphragm used in the method.

FIG. 5 is a perspective view showing a conventional method of joining a steel pipe column and a steel beam.

[Explanation of symbols]

 Reference Signs List 1 steel pipe column 2 steel beam 2a upper flange 2b lower flange 2c web 2d small hole 4 upper diaphragm 4a through hole 4b small hole 5 lower diaphragm 5a through hole 5b small hole 6 bracket 6a small hole 10 splice plate 12 rib

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Koichi Sugimoto 4-640 Shimoseito, Kiyose-shi, Tokyo F-term in Obayashi-gumi Technical Research Institute Co., Ltd. CA05

Claims (4)

[Claims] A steel beam column having a flange and a web joined to a steel beam column, wherein the steel beam column has a through-hole having substantially the same cross-sectional shape as the steel tube column. A method of joining a steel tube column and a steel beam, comprising: inserting a diaphragm into a steel tube column, intermittently welding or partially penetrating the diaphragm to the steel tube column, and joining a flange of a steel beam to the diaphragm. 2. The steel pipe column and the steel frame according to claim 1, wherein an upper flange of the steel beam is cut out by a predetermined length, and an end of the flange is abutted to the diaphragm and joined via a splice plate. How to join the beam. 3. The method according to claim 1, wherein the lower flange of the steel beam is overlapped with an upper surface of the diaphragm and joined. 4. A diaphragm used for joining a steel pipe column to a plurality of steel beams including a flange and a web, the diaphragm being a single plate having a through-hole having substantially the same shape as the cross-sectional profile of the steel pipe column. A diaphragm used in the method for joining a steel pipe column and a steel beam according to any one of claims 1 to 3.