JP2004324361A - Uneven beam field execution method of steel framed structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an uneven beam field execution method simplifying the structure and reducing the construction time and manufacturing cost by changing a joint type. <P>SOLUTION: A flange steel plate with 20-50 cm dimension is projected from a square steel pipe by penetrating/overhanging or the like, a central beam flange is provided at both lower sides of the two upper and lower sheets of the flange steel plate bracket and fillet welding of the flange steel plate and the central beam. The welding quantity of steel framed system is greatly reduced, and further, the method can reduce stress concentration/strain generation and embrittlement. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method of a technology capable of manufacturing an architectural steel structure at a construction site by fillet welding or bolt joining or a combination thereof at a column-beam joint of a building steel structure. It is about.
[0002]
[Prior art]
In the prior art, as shown in FIG. 1, a beam-to-column joint of a building steel structure is formed by applying a weld 6 between a diaphragm 1 made of a steel plate having a beam penetrating a beam and a short rectangular steel pipe 2. A die composed of the diaphragm 1 and the short rectangular steel pipe 2 is formed, the die and the H-shaped steel beam flange 4 are welded to each other, and the die and the rectangular steel pipe column 5 are further welded to each other. Many. In this prior art, as shown in FIG. 2, welding 6 between the square steel pipe 2 of the dice and the diaphragm 1 and welding 7 between the diaphragm 1 of the dice and the H-shaped steel flange 4 are performed by one-side welding using a backing metal 10. It has been implemented. In the conventional welding method of the diaphragm 1 and the beam flange 4, a beveling process is performed on an end to be joined of the beam flange 4, and then, a backing metal 10 is produced and a tack welding 8 for attaching the backing metal is performed. The main welding 7 is performed. The welding between the diaphragm 1 and the rectangular steel pipe 2 or 5 is also performed by forming a groove at the end of the rectangular steel pipe 2 or 5 to be joined, and then the temporary welding 8 for producing the backing metal 10 and attaching the backing metal. The main welding 6 between the diaphragm 1 and the square steel pipe 2 or 5 is performed.
[0003]
On the other hand, in joining a diaphragm and a beam flange, the diaphragm and the beam flange are often butt-welded at a factory or a construction site. In addition, in joining the diaphragm and the beam flange, the diaphragm and the beam flange may be overlapped and welded or bolted together, but both of the two flanges that form a pair of beams are located inside the upper and lower diaphragms. Is provided.
[0004]
At present, the installation of the center beam between the pillars is performed by first mounting a 800-1200 mm bracket at the beam-column joint to form a panel zone, and joining the bracket and the center beam with bolts at the ends of the bracket. It is normal to be.
[0005]
[Problems to be solved by the invention]
Most of the conventional building steel beam-column joints are made of dice as shown in FIG. 1, and the columns and beams are welded and joined via the dice. Done. In the conventional method, the dice have a large number of members such as a diaphragm 1, a square steel pipe 2, a backing metal 10, and an end tab, as shown in FIG. . As a result, the cost of dice production is greatly increased.
[0006]
In joining the diaphragm and the beam flange, when the diaphragm and the beam flange are overlapped and welded or bolted together, both of the two flanges, which are a pair of beams, are provided inside the diaphragm, The inner dimensions between the diaphragms and the outer dimensions between the two flanges forming a pair of beams often do not match due to the dimensional tolerance of the steel material, and it is often difficult to insert the beams between the diaphragms. In addition, if the size of the inner space between the diaphragms is set to be relatively large, there is a problem that the gap between the diaphragm and the beam flange becomes too large, so that welding or bolt joining becomes difficult.
[0007]
In mounting a beam between columns, a bracket of 800 to 1200 mm is attached to a beam-column joint, and then a shaft is attached to produce a large number of column columns of about 10 m long, and the bracket is 800 to 1200 mm long and protrudes from the column. Therefore, it occupies a large place and space, and is inefficient in storage and transportation in a factory.
[0008]
When the diaphragm and the beam flange are butt-welded at the construction site in joining the diaphragm and the beam flange, it is often difficult to adjust the welding groove gap with high accuracy. Therefore, as shown in FIG. It is normal that the bracket 3B and the center beam 3C are bolted 3C between the column brackets 3B. For this bolt connection 3C, for example, 30 bolts and 8 splice plates are used at one location, and thus cost and man-hour are greatly increased.
[0009]
【Purpose】
An object of the present invention is to reduce the construction period and manufacturing cost by simplifying the structure and changing the joint type at the beam-column joint of a building steel structure.
[0010]
[Means for Solving the Problems]
For the purpose of solving such problems, if overlap fillet welding or bolting is used in the connection between the beam-column joint and the beam, adjustment of the welding joint gap and adjustment of the gap between the diaphragm and the beam flange can be easily performed. In other words, it has been found that the bolt joint between the bracket for adjusting the joint gap and the center beam can be omitted, and the bracket between columns can be omitted. Further, it has been found that if bolt connection is used in the connection between the beam-column joint and the beam, the overlap fillet welding can be omitted.
[0011]
Further, a beam flange is installed under each of the pair of upper and lower diaphragms, not between the pair of upper and lower diaphragms of the column-beam joint, or each of the pair of upper and lower diaphragms is provided. It has been found that if the upper and lower beam flanges are provided on the upper side, the beam flange can be provided to the diaphragm without worrying about the problem of intersection or insertion.
[0012]
In the invention according to claim 1, with respect to the conventional beam-to-column joint, the projecting portions in which the two upper and lower diaphragms of the beam-to-column joint protrude toward the beam side are respectively provided above and below the beam-to-column joint. The beam flange ends are overlapped below the upper and lower diaphragm protruding portions, respectively, and are joined by fillet welding or bolt joining or a combination thereof, or the upper and lower two diaphragm protruding portions are provided. By using the method of assembling the beam-to-column joint and the beam to form a steel structure by superposing the beam flange ends on the upper side and joining them by fillet welding or bolt joining, the diaphragm projection The joint between the beam flange and the beam flange is fillet welded or bolted or a combination of these, so that the gap between the diaphragm and the beam flange in the conventional butt joint is adjusted. Disappears, omit the brackets, omitting the bolted beam mounting found that attachment of the beam flange is facilitated to provide the beam flange in the same direction of the lower or upper Both the two diaphragms.
[0013]
The invention according to claim 1 is to provide a projecting portion in which a diaphragm is projected to the beam side with respect to a conventional beam-to-column joint, and that the beam flanges are provided below the upper and lower two diaphragm projecting portions, respectively. Overlapping the ends or overlapping the beam flange ends above the upper and lower two diaphragm projections, and joining the projecting diaphragm and the beam flange by fillet welding or bolting or a combination thereof It is composed of The novelty of the present invention lies in the combination of these configurations.
[0014]
In the invention according to claim 2, the shape of the dice at the conventional beam-column joint is changed so that a diaphragm penetrating the column and a short pipe provided in the middle of the diaphragm are integrally formed with a solid thickness. For the upper and lower ends of a rectangular parallelepiped die made of steel plate, cast steel or forged steel, a pair of flange steel plates are joined in the horizontal direction, respectively, and the center beam flange ends are overlapped below the upper and lower flange steel plates respectively. By joining by fillet welding or bolt joining or a combination thereof, or by overlapping the beam flange ends on the upper side of the upper and lower flange steel plates and joining by fillet welding or bolt joining or a combination thereof, If the method of fabricating a steel structure by assembling the beam-to-column joint and the beam is used, the joint between the flange steel plate and the beam flange may be fillet welded or bolted or joined. Because of these combinations, there is no need to worry about the gap adjustment between the conventional butt joint or the flange steel plate and the beam flange, the bracket is omitted, the bolt connection for beam attachment is omitted, and both the two diaphragms are used. It has been found that the installation of the beam flange is facilitated by providing the beam flange in the same direction on the lower side or the upper side.
[0015]
The invention according to claim 2 is that the flanged steel plate protrudes toward the beam side with respect to the upper and lower ends of a solid or hollow thick steel plate, cast steel or forged steel die in which the conventional column-beam joint is integrally formed. Providing the overhanging portions, and overlapping the beam flange ends below the upper and lower two flange steel plates, or overlapping the beam flange ends above the upper and lower two flange steel plates, respectively. It consists of joining and joining the flange steel plate and the beam flange by fillet welding or bolt joining or a combination thereof. The novelty of the present invention lies in the combination of these configurations.
[0016]
In the invention according to claim 3, the dice at the beam-to-column joint of the conventional type are omitted, and the rectangular steel pipe column is not divided and cut at the beam attachment portion, and at least one of the beams is used instead of the conventional H-shaped steel bracket. Using two pairs of horizontal and parallel flanged steel plates, all the pairs of flanged steel plates are inserted into the through holes opened at the beam connection points of the square steel tube column in a manner similar to the beam cross-sectional shape, The pair of flanged steel plates is extended about 20 to 50 cm outside the rectangular steel pipe, and the paired beams of the flanged steel plate and the paired beams of the flanged steel plate in the other direction intersect inside the rectangular steel pipe column, All of the pair of through-beams of the flanged steel plate and the square steel tube column are butt-bonded or fillet welded, and the beam flange ends are respectively provided below the pair of upper and lower flange steel plates outside the square steel tube. Overlap fillet welding or bolt joining Are joined by these combinations, or by overlapping the beam flange ends on the upper side of the pair of upper and lower flange steel plates and joining them by fillet welding or bolt joining or a combination thereof, If a method of fabricating a steel structure by assembling a joint and a beam is used, since the joint between the flange steel plate and the beam flange is fillet welding or bolt joining or a combination of these, the gap adjustment of the conventional butt joint and the joint There is no need to worry about the gap adjustment between the flanged steel plate and the beam flange, the bracket is omitted, the bolt connection for mounting the bracket and the center beam is omitted, and both the two diaphragms have the same lower or upper beam flange. It has been found that the installation of the beam makes it easy to attach the beam flange.
[0017]
According to a third aspect of the present invention, at least one of the beams is a pair of two horizontal and parallel flanged steel plates instead of the conventional H-shaped steel bracket, and the beam connection portion of the square steel pipe column is made to resemble the beam cross-sectional shape. All the paired beams of the flanged steel plate are inserted into the through holes opened so that the paired beams of the flanged steel plate intersect with the paired beams of the flanged steel plate in the other direction inside the square steel tubular column. Providing a projecting portion in which a pair of beams of the flange steel plate is protruded toward the beam side; and overlapping the beam flange ends below the upper and lower two flange steel plates or respectively, and Each of the beam flange ends is overlapped on the upper side of the flange steel plate, and the flange steel plate and the beam flange are joined by fillet welding, bolt joining, or a combination thereof. The novelty of the present invention lies in the combination of these configurations.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
Example 1
In the method according to the first aspect of the present invention, as shown in FIGS. 4 and 5, the upper and lower two columns of the beam-column joint with respect to the conventional beam-column joint at the beam-column joint of the building steel structure. Projecting portions 1C, each of which has the diaphragm 1 projecting about 20 to 50 cm toward the beam side, are provided above and below the column-beam joint portion, respectively, and the beam flange ends are respectively provided below the upper and lower two diaphragm projecting portions 1C. If a method of fabricating a steel structure by assembling the beam-column joint and the beam by overlapping and joining with the fillet weld 19 is used, the joint between the diaphragm projection 1C and the beam flange 4 is formed by fillet welding. Therefore, there is no need to worry about the gap adjustment between the diaphragm and the beam flange in the conventional butt joint, the bracket 3B in FIG. 3 is omitted, and the bolt connection for mounting the bracket 3B and the center beam 3C is omitted. Omitted, mounting the beam flange for providing the lower or upper beam flange in the same direction both the two diaphragms is facilitated. When the end of the beam flange is overlapped with the lower side of the lower diaphragm, it is necessary to cut out the web 9 on the beam side and insert the diaphragm 1C, and to insert the diaphragm 1C and the web in the notch. 9 is subjected to fillet welding. The joint between the diaphragm protruding portion 1C and the beam flange 4 is a fillet weld 19 on the entire surface, but a side fillet weld 19A, 19B or a bolt joint 20 is also performed if necessary.
[0019]
Example 2
In the method according to the first aspect of the present invention, as shown in FIGS. 6 and 7, the upper and lower two columns of the beam-to-column joint are compared with the conventional beam-to-column joint at the beam-to-column joint of the building steel structure. Projections 1C, each of which has the diaphragm 1 projecting about 20 to 50 cm toward the beam side, are provided above and below the column-beam joint, respectively, and the beam flange ends 4 are respectively provided below the upper and lower two diaphragm projections 1C. If a method of assembling the column-beam joint and the beam 3C to produce a steel structure by overlapping and joining with the bolt joint 20 is used, the joint between the diaphragm projection 1C and the beam flange 4 is bolted. Therefore, there is no need to worry about the gap adjustment between the diaphragm and the beam flange in the conventional butt joint, the bracket is omitted, and the bolt connection for mounting the bracket 3B and the center beam 3C in FIG. Omitted, mounting the beam flange for providing a beam flange to the lower or upper Both the two diaphragms is facilitated. When the end of the beam flange is overlapped with the lower side of the lower diaphragm, it is necessary to cut out the web 9 on the beam side and insert the diaphragm 1C, and to insert the diaphragm 1C and the web in the notch. 9 is subjected to fillet welding.
[0020]
Example 3
In the invention according to claim 2, by changing the shape of the dice at the conventional beam-column joint, as shown in FIGS. 1 and 8, the diaphragm 1 penetrating the column 5 of FIG. The length of about 20 to 50 cm in the horizontal direction with respect to the upper and lower ends of a solid steel plate, cast steel or forged steel rectangular parallelepiped die 25 integrally formed with the short pipe 2 provided in FIG. The pair of flange steel plates 4A are welded and joined, and as shown in FIGS. 10 and 11, the beam flange ends 4 are respectively overlapped below the upper and lower flange steel plates 4A and joined by fillet welding 19. Thus, if the method of assembling the beam-column joint and the center beam 3C to manufacture a steel structure is used, the joint between the flange steel plate 4A and the beam flange 4 is fillet welding, so that the conventional butt joint or the conventional joint is used. Flange steel There is no need to worry about the gap adjustment between the beam flange and the beam flange, the bracket is omitted, the bolt connection for beam attachment is omitted, and the beam flange 4 is provided below both of the two flange steel plates 4A. Installation becomes easier. When the beam flange end 4 is superimposed on the lower side of the lower flange steel plate 4A, it is necessary to cut out the web 9 on the beam side and insert the diaphragm 1C. 4A and the web 9 are subjected to fillet welding 19B. The joint between the flange steel plate 4A and the beam flange 4 is a fillet weld 19 on the entire surface, but if necessary, a side fillet weld 19A, 19B or a bolt joint 20 is also performed. Further, the welding 24 of the integrated die 25 and the column 5 with the rectangular steel pipe and the welding of the integrated die 25 and the flange steel plate 4A are integrated as shown in FIG.
[0021]
Example 4
Although the integrated dice 25 in the third embodiment is solid, the invention according to claim 2 can be similarly implemented when the integrated dice 25 has a hollow portion 26 as shown in FIG. FIG. 12 is a front view in which overhanging flange steel plates are provided on the hollow dice, respectively, and the beam flange ends are overlapped with each other below the upper and lower two overhanging flange steel plates and joined by fillet welding, In this case, the welding 24 between the integrated die 25 and the column 5 by the square steel pipe and the welding 24 between the integrated die 25 and the flange steel plate 4A are not integrated.
[0022]
Example 5
In the invention according to claim 3, in place of the conventional H-shaped steel bracket as shown in FIG. 1, at least one of the beams is provided with two horizontal and parallel flange steel plates 18 as shown in FIGS. A pair of beams 18 of the flange steel plate is inserted into a through hole formed in the beam connection portion of the rectangular steel pipe column 5 in a shape similar to the cross section of the beam, and the other pair of beams 18 of the flange steel plate and other A pair of beams 18A of the flanged steel plate in the direction intersect with each other inside the rectangular steel tube column, and a projection of about 20 to 50 cm in length is provided in which the paired beams 18 of the flanged steel plate project toward the center beam 3C. And that the beam flange ends 4 are superimposed on the lower side of the upper and lower two flange steel plates 18, respectively, and the flange steel plates 18 and the beam flanges 4 are joined by fillet weld joints 19. I have. When the beam flange end 4 is superimposed on the lower side of the lower flange steel plate 18, it is necessary to cut out the web 9 on the beam side and insert the flange steel plate 18. Fillet welding 19B is performed on the steel plate 18 and the web 9. The joint between the flange steel plate 18 and the beam flange 4 is a fillet weld 19 on the entire surface, but a side fillet weld 19A, 19B or a bolt joint 20 is also performed as necessary.
[0023]
Example 6
In Example 5, one and the other are horizontal and parallel two pairs of steel plate beams 18 that penetrate the rectangular steel tube column 5 and intersect inside the steel tube columns 5 and two pairs of steel plate beams 18 and columns. FIG. 17 shows an embodiment in which the central beam 3C between the pillars is fillet welded 19 outside the column, and the reinforcing plate 14 is further provided between the penetrating beam 18 and the column 5.
[0024]
Example 7
In the invention according to claim 3, instead of joining the flange steel plate 18 and the beam flange 4 by the fillet weld joint 19 in the fifth embodiment, bolt joining is performed as shown in FIGS.
[0025]
Example 8
15, FIG. 16, FIG. 17, FIG. 18 and FIG. 19, the joint 15 between the column 5 and the steel plate beam 18 having two pairs includes complete penetration, partial penetration, and fillet welding. ]
【The invention's effect】
The effects of the present invention are as follows as compared with the conventional method.
1. Brackets installed on pillars can be omitted.
2. Bolt connection between the bracket and the central beam between the columns can be omitted.
3. The flange member projecting from the column is as short as 20 to 50 cm, and the space in the prefab factory and the space for transportation may be small.
4. The method of building the building is centered on joining with the center member of the flange member protruding from the pillar, and this joining is fillet welding joining or bolt joining, so that the construction is easy.
5. According to the third aspect of the present invention, since the dice can be omitted, the columns up to three stories can be manufactured at a time without being divided or assembled in small steps.
6. For the above reasons, the cost of manufacturing and building the steel frame can be reduced by 10 to 30%.
[Brief description of the drawings]
FIG. 1 is a three-dimensional view of a beam-column joint using a conventional rectangular steel pipe.
FIG. 2 is a sectional view of a beam-column joint using a conventional rectangular steel pipe.
FIG. 3 is a three-dimensional view of a beam-column joint, a bracket and a center beam using a conventional rectangular steel pipe.
FIG. 4 shows upper and lower projecting portions in which the diaphragm is projected toward the beam side, and the beam flange ends are overlapped below the upper and lower two diaphragm projecting portions, respectively, and joined by fillet welding. It is a front view.
FIG. 5 is a top view of FIG. 4;
FIG. 6 is a front view in which projecting portions having a diaphragm protruding toward the beam side are provided on the upper and lower sides, respectively, and the beam flange ends are overlapped below the upper and lower two diaphragm protruding portions and joined by bolts. It is.
FIG. 7 is a top view of FIG. 6;
FIG. 8 is a three-dimensional view in which a flange steel plate is attached to a solid integrated die by butt welding.
FIG. 9 is a three-dimensional view in which a flange steel plate is attached to a hollow integrated die by butt welding.
FIG. 10 is a front view in which overhanging flange portions are provided on the upper and lower ends of an integrated die, respectively, and upper and lower two overhanging flange portions are overlapped with lower and upper two overhanging flange portions, respectively, and joined by fillet welding. FIG.
FIG. 11 is a top view of FIG. 10;
FIG. 12 is a front view in which overhanging flange steel sheets are provided on the upper and lower sides of the hollow dice, respectively, and the beam flange ends are overlapped below the upper and lower two overhanging flange steel sheets and joined by fillet welding; .
FIG. 13 is a cross-sectional view showing that welding of a column and a flange steel plate to be joined to an integrated die is integrated.
FIG. 14 is a three-dimensional view of a square steel pipe column having a pair of two steel plates and a square steel pipe side opening for beam penetration of a steel plate.
FIG. 15 is a diagram showing a pair of steel plates, one of which is horizontal and parallel, and a pair of steel plates penetrating through and crossing inside a rectangular steel tubular column, and a central beam between the columns. FIG. 4 is a front view of a case where the members are welded and joined outside a pillar.
FIG. 16 is a top view of FIG.
[FIG. 17] A beam of a steel plate having a pair of two pieces, one horizontal and one being parallel, penetrating through and crossing inside a rectangular steel tubular column, and a central beam between the steel plate and a pair of two pieces. FIG. 4 is a front view of a case in which a welding plate is welded outside a pillar, and a reinforcing plate is installed between the penetrating beam and the pillar.
FIG. 18 is a view showing a pair of steel plates, one of which is a pair of horizontal and parallel steel plates, and the other of which is a pair of H-shaped steel beams. It is a front view at the time of bolt-joining the intermediate H-beam between a beam and a column outside a column.
FIG. 19 is a top view of FIG. 18;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Diaphragm 1B of a building steel column-beam joint part Diaphragm 1C which has a projection in the beam direction Extension part of a diaphragm 2 Square steel pipe between diaphragms. A member composed of 1 and 2 is called a dice.
Reference Signs List 3 H beam 3B H beam bracket 3C Center beam between columns 4 H beam flange 4A Flange steel plate attached to dice 5 Column made of square steel pipe 6 Welding of square steel pipe and diaphragm 7 Beam flange and diaphragm Butt welding 8 Temporary or assembly welding 9 H-shaped steel beam web 10 Backing metal 11 Scallop 12 Plate 1
13 Plate 2
14 Reinforcement plate 15 Welding between rectangular steel pipe and beam 16 Bolt joint hole 17 Two rectangular steel pipe side opening 18 for beam penetration of steel plate as a pair Two horizontal and parallel pair of steel beam 18A Horizontal Another pair of two parallel steel plates 19 Beam fillet weld 19 between diaphragm and beam flange 19A Side fillet weld between diaphragm and beam flange 19B Side fillet weld 20 between diaphragm and web 20 Bolt joint 21 Inside rectangular steel pipe Of beam intersection 22 Gusset plate 23 Overlay welding 24 Butt welding 25 Integrated dice 26 Hollow part of integrated dice center

Claims (3)

In a beam-to-column joint using a beam-penetrating diaphragm of a building steel structure, two upper and lower projecting portions are provided above and below the beam-to-column joint so that the two diaphragms project toward the beam side. The beam flange ends are overlapped on the lower side of the diaphragm projection, respectively, and are joined by fillet welding, bolt joining, or a combination thereof, or the beam flange ends are respectively placed above the upper and lower two diaphragm projections. A method of fabricating a steel structure by assembling a beam-column joint and a beam by overlapping portions and joining them by fillet welding or bolt joining or a combination thereof At the beam-column joint of a building steel structure, a solid or hollow thick steel plate / cast steel made by integrally forming two flanged steel plates penetrating the column and a square steel pipe provided between the two flanged steel plates Or, at the upper and lower ends of a rectangular parallelepiped die made of forged steel, a pair of flange steel plates are joined in the horizontal direction, respectively, and the beam flange ends are overlapped below the upper and lower flange steel plates, respectively, so that fillet welding or bolt joining or The beam-to-column joint and the beam are joined by these combinations, or by overlapping the beam flange ends on the upper and lower sides of the flange steel plate and joining them by fillet welding or bolt joining or a combination thereof. To make a steel structure by assembling At the beam-column joint of a building steel structure, at least one of the beams is a pair of two horizontal and parallel flanged steel plates. Inserting all pairs of beams of the flanged steel plates so that the paired beams of the flanged steel plates intersect with the paired beams of the flanged steel plates in the other direction inside the rectangular steel tubular column; Fillet welding by joining the through beam of the pair of steel plates and the square steel tube column by welding and joining the ends of the center beam flange between the columns to the lower side of the pair of upper and lower flange steel plates outside the square steel tube. Or by joining by bolt joining or a combination thereof, or by overlapping the ends of the central beam flange on the upper side of the pair of upper and lower flange steel plates and joining by fillet welding or bolt joining or a combination thereof. Method of making a steel structure to assemble and the central beam Joints

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