JP4749068B2 - Steel column manufacturing method - Google Patents

Description

  The present invention relates to a method for welding and joining steel pipe columns of a building steel structure.

  As shown in FIG. 1, in a conventional steel frame and steel pipe structure, a dice 2 is manufactured from a short pipe made of steel pipe and a diaphragm by small assembly, and a panel zone 2 for attaching a beam bracket 4 to the dice is manufactured by intermediate assembly. In a large assembly, a steel pipe shaft 5 is attached to the panel zone 2 to manufacture a column with a beam bracket, that is, a one-column column. That is, the production is divided into three assembly steps.

  And in the case of butt welding joining with a square steel pipe or a round steel pipe column of a building steel structure and a diaphragm, a base plate or a solid dice, as shown in FIG. 1 and FIG. A ladle groove 34 is applied to the end portion of the column 5 of the steel pipe, and the backing metal 10 is brought into close contact with the back side of the end portion of the column 5 so that one-side welding is performed from the side having the address groove.

  On the other hand, there is a method in which a column is manufactured from a steel pipe shaft, a steel pipe short pipe, a diaphragm, etc. at the same time by assembly welding and subsequent main welding, and then a beam bracket is attached. This method is called a column body method. In this column construction method, because the columns are long, the columns are laid down horizontally and the beam brackets are placed vertically on the columns, or the beam brackets are placed horizontally next to the columns, and the beam brackets are respectively connected to the columns. The mounting welding is either horizontal welding or vertical welding.

On the other hand, there is the following method for one-side welding without using a backing metal.
As shown in FIG. 3, there is a method of performing back wave welding by abutting welding members.
As shown in FIG. 4, by butt welding member, there is a method of performing melt-through bead welding by applying a non-consumable steel backing metal such as copper on the back side (Japanese Patent Application No. 8-60098 (JP-A-09-225635 JP : Patent Document 1)).
As shown in FIG. 5, there is a method of welding and welding on one side of the back surface of one member end (Japanese Patent Application No. 2000-202582 (JP 2001-259830 A: Patent Document 2) , referred to as WAWO method). .
As shown in FIG. 6, a method of placing a bead 38 in advance at a welding location of a plate 1 to be welded, setting a groove to the bead 38, and welding from the front side (Japanese Patent Application No. Hei 4-162208 (Japanese Patent Application No. Hei 5-177347). Publication: Patent Document 3)).
JP 09-225635 A JP 2001-259830 A JP-A-5-177347

  As shown in FIG. 1 and FIG. 2, a rectangular groove 34 is usually applied to the end of a prismatic or circular steel pipe column 5, and the backing metal 10 is closely attached to the rear side of the column 5, that is, the inner surface. The method of making one-sided welding from the grooved side by butting the column 5 and the diaphragm 1 together after tack welding in the inner part of the column requires man-hours for setting the backing metal. There is a problem that a root portion exists in both the member 5 and the member 1 and a defect is likely to occur in the root portion unless both of them are sufficiently melted by first layer welding. Therefore, a large value of about 7 mm must be used for the distance between the root portions, that is, the gap. Therefore, there is a problem that the amount of welding in the weld groove increases and the number of man-hours increases. Further, in this conventional method, a gap remains between the end of the square steel pipe or circular steel pipe column 5 and the backing metal 10, and stress concentration occurs between the square steel pipe or circular steel pipe column 5 and the backing metal 10. There is a problem of reducing the strength of the working column joint.

On the other hand, there is a method of construction without using backing metal.
As shown in FIG. 3, the method of performing the backside welding 36 by abutting the welding members 35 is quite advanced in order to obtain a backside bead properly so that the molten metal does not melt because there is no backing metal. It is necessary to ensure the workmanship and the groove accuracy. Actually, it is extremely difficult to ensure the accuracy of the steel material and the manufacturing accuracy of the steel part, and the back wave welding is not popular.

  As shown in FIG. 4, the method of performing back wave welding by abutting the welding members 1 and 5 and applying a non-consumable backing metal 10 </ b> A such as copper to the back side is as follows. It is impractical because the non-consumable non-consumable money cannot be applied.

  As shown in FIG. 5, the method of performing weld overlaying on the back surface of one member end and performing one-sided welding requires man-hours for overlay welding.

  In order to solve the problems, stress concentration is prevented, the welding groove cross-sectional area is reduced, the number of welding processes is reduced, the number of mounting sets for the backing metal is reduced, and a construction method that does not depend on the material and production accuracy has been developed. I have to. As a result of examining each of these problems individually and determining the optimum method, the conventional method of attaching the backing metal in close contact with the back side of the steel tube column end was canceled and the backing metal was attached to the steel tube column end. A ring-shaped steel plate having a disk shape or a rectangular cross section called a backing metal is attached to the diaphragm, base plate, solid dice side, or the steel pipe side, and the end of the column steel pipe and the backing material. So that the distance between the inner surface of the end portion of the steel pipe and the outer surface of the backing metal for butt welding is 1 to 5 mm over a part of the circumference or almost the entire circumference. When set, this was called a backing material welding method or method, and it became clear that all these problems were solved.

  In this way, since the distance between the inner surface of the end of the steel pipe and the outer surface of the backing metal for butt welding can be ensured to be approximately 1 to 5 mm, the conventional backing metal is brought into close contact with the inner surface of the steel pipe column. Therefore, the stress concentration is relaxed and the groove root portion is easily melted, and welding defects such as blow holes, undercuts and poor penetration are reduced. In addition, the backing metal is attached to the outer surface of a diaphragm, base plate or solid dice having a smaller mass than that of a long column steel pipe with a mounting position accuracy of 1 to 5 mm. This makes it much easier and saves work time than attaching backing metal. Alternatively, if the backing metal is attached to the inner surface of the steel pipe side, which is relatively short and light, the stress concentration is eased because the backing metal is not in close contact with the inner surface of the steel pipe column. The tip part is easily melted, and welding defects such as blow holes, undercuts and poor penetration are reduced. That is, in the present invention, even if the dimensional accuracy of the column steel pipe end is slightly worse, the construction is easy and fast, and stress concentration can be alleviated. In addition, since this backing metal can melt | dissolve a root | route part enough only by receiving the molten metal at the time of route welding, it is not necessary to melt | dissolve backing metal like the backing metal system. In addition, this backing metal welding method includes the steps of attaching the beam bracket after assembling the steel pipe column and welding the joint, and welding the beam bracket after producing the dice of the joint between the beam and column, that is, the joint. It can be applied to either of the methods of joint-welding a steel pipe column shaft.

  In addition, when performing the backing metal welding, at least the inner surface of the steel pipe end and the backing metal outer surface for butt welding are filled with metal powder, a cut wire, a coated welding rod, or a mixture thereof. If installed, even if the gap between the inner surface of the end of the steel pipe and the outer surface of the backing metal for butt welding is large, when the steel pipe column and the diaphragm, base plate or solid dice are butt welded, the molten metal However, the stress concentration is further reduced, the welding efficiency is improved, and the number of welding operations can be further reduced. If metal powder, cut wire, coated welding rod or a mixture thereof is also filled or installed in the groove between the steel pipe column and the diaphragm, base plate or solid dice, the welding efficiency is improved and the number of welding operations is further increased. Can be reduced.

  In the invention which concerns on Claim 1, 1st structure of invention is a building steel frame structure, The distance of the inner surface of this steel pipe end part and the backing metal outer surface for this butt welding is substantially 1 to over a perimeter. The outer diameter and position of the backing metal are determined so that 5 mm can be secured, and the second configuration of the invention is not to attach the backing metal to the column side, but to the diaphragm, base plate or solid dice side The backing metal is tack welded, and the third configuration of the invention is to butt weld the steel pipe end and the diaphragm, base plate or solid dice after tack welding the backing metal. That is.

  In the invention according to claim 2, the first configuration of the invention is that, in a building steel structure, when a butt weld joint is joined to a square steel tube column or a circular steel tube column and a diaphragm, a base plate or a solid die, the end of the steel tube column It is to be able to ensure about 1 to 5 mm in the distance between the inner surface of the portion and the outer surface of the disc-shaped or ring-shaped backing metal, and the second configuration of the invention is the outer diameter of the backing metal. And the position is determined, and the backing metal is tack welded to the square steel tube column or the circular steel tube column side, and the third configuration of the invention is the steel tube end and the diaphragm, base plate or solid dice. It is a steel column manufacturing method characterized by butt welding.

In the invention according to claim 3, in addition to the structure of the invention according to claim 1 or 2 , the fourth structure of the invention is that at least the inner surface of the end portion of the steel pipe and the butt are in the front groove portion of the butt weld. Filling or installing metal powder, a cut wire, a coated welding rod or a mixture thereof between the outer surface of the backing metal for welding.

The invention according to claim 1 has the following effects .
There is no tight gap between the column steel pipe and the backing metal, and the stress in this portion is reduced, and joint strength with high bending ductility and fatigue strength can be obtained.
Since there is no tight gap between the column steel pipe and the backing metal, the joint root portion can be easily melted, and defects such as blow holes, undercuts and poor penetration in the root portion are unlikely to occur.
The root gap is good because the root gap can be made smaller than before, and the groove gap between the steel pipe column and diaphragm, base plate or solid dice is 2.5mm on average, compared with the average groove gap of 7mm in the conventional method. If this is done, the groove cross-sectional area is reduced and the welding amount can be reduced by about 30%.
Since the backing metal is attached to the diaphragm, base plate or solid dice side instead of the steel pipe column side, the backing metal is attached to the outer surface of the diaphragm, base plate or solid dice having a smaller mass than the long column steel pipe. Since it is attached at 5 mm, it is much easier and the working time can be shortened than attaching the backing metal in close contact with the inner surface of the end of the column steel pipe having a large weight and size.
Construction is easy and fast even if the dimensional accuracy of the column steel pipe is a little worse.
It can be applied not only to the column method, but also to the conventional method divided into three parts: dice assembly, panel zone assembly, and column assembly, and the column tip method in which the column is assembled first.

The invention according to claim 1 has the following effects .
There is no tight gap between the column steel pipe and the backing metal, and the stress in this portion is reduced, and joint strength with high bending ductility and fatigue strength can be obtained.
Since there is no tight gap between the column steel pipe and the backing metal, the joint root portion can be easily melted, and defects such as blow holes, undercuts and poor penetration in the root portion are unlikely to occur.
The root gap is good because the root gap can be made smaller than before, and the groove gap between the steel pipe column and diaphragm, base plate or solid dice is 2.5mm on average, compared with the average groove gap of 7mm in the conventional method. If this is done, the groove cross-sectional area is reduced and the welding amount can be reduced by about 30%.
Construction is easy and fast even if the dimensional accuracy of the column steel pipe is a little worse.
It can be applied not only to the column method, but also to the conventional method divided into three parts: dice assembly, panel zone assembly, and column assembly, and the column tip method in which the column is assembled first.

The invention according to claim 3 has the following effect in addition to the invention according to claim 1 or 2 .
The reduction of stress concentration is greater than that of the invention according to claim 1 or 2 .
Compared to the invention according to claim 1 or 2 , the welding efficiency is improved and the number of welding work steps can be further reduced.

Next, an embodiment of a method for welding a backing steel for a structural steel structure will be described.

Embodiment 1
FIG. 7 shows an example of a backing metal according to claim 1 of the present invention. FIG. 7 (a) is a square disc-shaped backing metal with a rounded corner set with the outer diameter of the backing metal inserted in accordance with the inner diameter shape of the square steel pipe, and the plate thickness 40T is about 3 to 25 mm. Desirably, the outer diameter 40D of the backing metal is set to be about 1 to 12 mm, preferably about 2 to 8 mm smaller than the inner diameter of the steel pipe. When used for a box column column, the corner of the disc-shaped backing plate is right-angled or the cross section of the backing plate of the box column column is cut out. In the case of a circular steel pipe, the entire front surface of the disk-shaped backing metal is circular. Fig. 7 (b) shows a rectangular cross-section backing metal made into a ring by bending a rectangular cross-section flat bar with the outer diameter of the backing metal inserted according to the inner diameter of the square steel pipe column. The plate thickness 40T is about 4 to 12 mm, preferably about 6 to 9 mm, the plate width 40B is about 3 to 25 mm, and preferably about 4 to 8 mm, and the outer diameter of the backing metal is 40D. Is about 1 to 12 mm, preferably about 2 to 8 mm smaller than the inner diameter of the steel pipe column. Usually, it is divided into two parts with a “U” -shaped appearance, but it can be used in an integrated ring shape with a “B” -shaped appearance. B-shaped rectangular cross-section backing metal is easier to set on the diaphragm. When manufacturing a building steel frame, the inner diameter of a square steel pipe or a round steel pipe is shown in advance in the design drawing, so it is possible to set the outer diameter of the backing metal 40 in advance and prepare the backing metal before production. I can do it.

Embodiment 2
As embodiments according to the first aspect of the present invention, in FIG. 8 (b), when the outside diameter of the diaphragm 1 is substantially equal to the outer diameter of the column 5, the columns 5 diaphragm 1 disk-shaped back bushes 40 An example of combination is shown. FIG. 8B shows an example in which the column 5, the solid dice 32, and the disc-shaped backing metal 40 are combined when the outer diameter of the diaphragm 1 is substantially equal to the outer diameter of the column 5. FIGS. 8 (a) and (b) show the situation in which the first layer welding of the joint was partially performed by combining the column 5, the diaphragm 1 and the disc-shaped backing metal 40, but the assembly procedure is as shown in FIG. In this case, as shown in FIG. 9 (a) or (b), after the diaphragm 1 and the backing metal 40 are tack welded 8, the column 5 and the diaphragm 1 or the backing metal 40 are assembled and welded. This is the procedure for diaphragm 1. FIG. 9 (a) shows a case where temporary welding is performed on the inside of the hole formed in the center of the disk-shaped backing metal. The disk-shaped backing metal has a hole having a diameter of, for example, about 60 mm in the center, The center hole of the diaphragm is concentrically aligned with the diameter of about 40 mm and positioned, and FIG. 9 (b) shows the case where the outer periphery of the disk-shaped backing metal is tack welded. As for the gold temporary work, the backing metal is not on the steel pipe column side as in the past, but the backing metal is placed on the outer surface and the radial accuracy is 1 to the lighter diaphragm side with a smaller mass than the column steel pipe. Since it is attached at 5 mm, it is much easier and the working time can be shortened than in the conventional method, when the backing metal is attached to the inner surface of the end of the column steel pipe, which has a large weight and size, by tack welding inside the steel pipe.

Embodiment 3
As embodiments according to the first aspect of the present invention, in FIG. 10 (a) (b) shows a groove set status of combining pillars 5 diaphragm 1 disk-shaped back bushes 40. FIG. 10A shows a case where the diaphragm 1 is temporarily welded to the hole in the center of the disc-shaped backing metal 40. FIG. 10B shows the outer periphery of the disk-shaped backing metal 40 on the diaphragm 1. FIG. This is a case where tack welding 8 is performed at the part. In the case of FIG. 10A, when the groove angle is 35 °, the groove gap g is about 0 to 5 mm, and preferably about 1 to 4 mm, and the gap h between the steel pipe column 5 and the backing metal 40. Is about 1 to 5 mm, and preferably about 2 to 3 mm. In the case of FIG. 10B, when the groove angle is 35 °, the groove gap g is about 0 to 6 mm, and preferably about 1 to 5 mm, and the gap h between the steel pipe column 5 and the backing metal 40. Is about 1 to 7 mm, and preferably about 2 to 5 mm. In this case, if the backing metal is attached to the diaphragm over a part or the entire circumference by fillet welding with a leg length of about 4 mm between the diaphragm 1 and the backing metal 40, the root welding melts between the diaphragm 1 and the steel pipe column. Cheap. In FIGS. 10 (a) and 10 (b), the case of a combination of a diaphragm and a disk-shaped backing metal was described. However, instead of the disk-shaped backing metal, a rectangular cross-section ring-shaped backing metal is used, and instead of the diaphragm. The same applies when using an integrated dice. The disc-shaped backing and rectangular cross-section backing can be applied to steel pipe columns of any outer diameter, but from the amount of material used and the cost, the rectangular cross-section backing is better when the outer diameter of the steel pipe pillar is approximately 400 mm or more. Is efficient.

Embodiment 4
As embodiments according to the first aspect of the present invention, in FIG. 11, first fitting the diaphragm by the conventional method in combination of column 5, the diaphragm 1, the disk-shaped back socket member 40 in the case of 25~30mm protrude from the pillar outer surface Although the state where a part of layer welding is performed is shown, the assembly procedure is as follows. As shown in the second embodiment , the diaphragm 1 and the backing metal 5 are tack welded 8 and then the column 5 and the diaphragm 1 or the backing metal 40 are assembled. Welding is performed and then the column 5 and the diaphragm 1 are joint-welded. FIG. 12 shows a cross-sectional view when a backing metal welding method using a rectangular cross-section backing metal is applied to a conventional construction method joint. FIG. 12 shows a state in which the first layer welding of the joint is partially performed by combining the column 5, the diaphragm 1, and the rectangular cross-section backing metal 40 when the diaphragm protrudes from the outer surface of the column by 25 to 30 mm in the conventional method. In the same manner as in the second embodiment , the diaphragm 1 and the backing metal 40 are tack welded 8 and then the column 5 and the diaphragm 1 or the backing metal 40 are assembled and welded. After that, the pillar 5 and the diaphragm 1 are joined together. It becomes the procedure of welding.

Embodiment 5
As embodiments according to the first aspect of the present invention, in FIG. 13, without the beveling the end of the tubular columns 5, the outer surface of the steel pipe column 5 by applying a beveling the end of the diaphragm 1 A situation where the first layer welding of the joint is partially implemented by combining the pillar 5, the diaphragm 1, and the disc-shaped backing metal 40 so as not to protrude is shown. The assembly procedure is the same as that of the second embodiment. After the backing metal 40 is tack welded 8, the column 5 and the diaphragm 1 or the backing metal 40 are assembled and welded, and then the column 5 and the diaphragm 1 are joint-welded. In either case, the details of the groove portion are the same as those in the second embodiment .

Embodiment 6
As embodiments according to the first aspect of the present invention, in FIG. 8 (b), when the outside diameter of the diaphragm 1 is substantially equal to the outer diameter of the column 5, the groove sets apart every welding method of the back receiving metal 40 showed an exemplary embodiment, as shown in FIG. 14, since a joint weld 17 to complete to complete the pillars 5 of the pillar 5 and the diaphragm 1 of this application, the flange 13 of the bracket beams 3 Is attached to the diaphragm 1 of the joint portion and welded 17, and then metallurgically integrated with the joint weld of the column 5 and the diaphragm 1 on the weld 17.

Embodiment 7
As embodiments according to the first aspect of the present invention, in FIG. 8 (b), in the case where the outer diameter of the actual dice 32 is substantially equal to the outer diameter of the column 5, the opening of the release every welding method of the back receiving metal 40 An example of the embodiment of the previous set has been shown. As shown in FIG. 15, after completing the joint welding 17 between the column 5 of this application example and the solid dice 32 to complete the column 5, the bracket beam 3 is attached to the end of the solid dice 32 of the joint portion and welded and joined 17, and at the same time, the joint welding of the column 5 and the solid dice 32 is superposed and metallurgically integrated .

Embodiment 8
As embodiments according to the first aspect of the present invention, in FIG. 13, the back receiving metal away every welding method using a disk shaped back bushes, Joint section with groove without tubular columns GMA with diaphragm As shown in FIG. 16, after completing the joint welding 17 between the column 5 and the grooved diaphragm 1 of this application example to complete the column 5, the flange 13 of the bracket beam 3 is connected to the joint portion. It attaches to the diaphragm welding part 17 with a groove | channel, and weld-joins 17, At the same time, it overlaps with the joint welding of the pillar 5 and the diaphragm 1 with a groove | channel, and is integrated metallurgically.

Embodiment 9
As embodiments according to claims 1 and 2 of the present invention, a welding method using the carbon dioxide gas welding, MAG welding, MIG welding, it is possible either arc welding TIG welding. Further, the joint welding posture can be any one of downward, lateral, and standing.

Embodiment 10
As the embodiment according to claim 2 of the present invention, FIG. 18 shows a cross-sectional view of a state in which a set of ring-shaped back receiving metal 40 to RHS or circular steel column 5.
In FIG. 18 (a), a part of the backing metal 8 is inserted inside the end portion of the steel pipe 5, and the gap 41 between the inner surface of the steel pipe 5 and the outer surface of the backing metal 40 is maintained at 1 to 5 mm. Temporary welding 8 is performed on the steel pipe 5 and the back metal 40 at the end of the steel pipe 5 or the back end of the back metal 40. Then, after welding with a diaphragm, a base plate, or a solid die, joint welding is performed. Such an operation is possible even when a disc-shaped backing plate is used as shown in FIG. 18 (B), but the temporary welding 8 is not the end side of the steel pipe 5. The ring-shaped backing metal is more advantageous when the outer diameter of the steel pipe 5 is larger, and the disk-shaped backing metal is advantageous when the outer diameter of the steel pipe 5 is smaller for reasons such as the weight and manufacturing cost of the backing metal.

Embodiment 11
An embodiment according to the invention of claim 3 is shown in FIG. In FIG. 17 (b), a disk-shaped backing metal 40 is used for joint welding between the steel pipe column 5 and the diaphragm 1, and between the inner surface of the end of the steel pipe column 5 and the outer surface of the disk-shaped backing metal 40. The metal powder or the cut wire 39 is filled. The metal powder or the cut wire 39 or the like is filled in the form of roses, solidified with water glass or the like, or filled with glass fiber in a knitted tube and sandwiched. In such a state, as shown in FIG. 17B, joint welding of the steel pipe column 5 and the diaphragm 1 is performed. If it does in this way, the first layer welding 31 of joint welding can be implemented stably. Further, if the groove is filled not only between the inner surface of the end portion of the steel pipe column 5 and the outer surface of the disc-shaped backing metal 40, the welding efficiency to the groove is improved and the welding efficiency is improved. Useful. In addition, as shown in FIG. 17C, the same effect can be obtained by using a rectangular cross-section backing metal instead of the disk-shaped backing metal 40.

It is an example of the three-dimensional figure of the conventional architectural steel-column-beam joint part . It is sectional drawing of the steel pipe / diaphragm / beam flange joint part of the conventional building steel column-beam joint part . It is a figure which shows normal reverse wave welding , (a) is a groove set figure, (b) is a reverse wave welding construction drawing. It is sectional drawing at the time of placing a non-consumable backing metal such as copper on the back side of the groove and performing joint welding from the groove side . FIG. 5 is a cross-sectional view of a state in which build-up welding is performed on the end portion of the member 13, and the end portion of the member and the build-up weld portion 14 are both grooved and joint welded . It is sectional drawing at the time of placing a bead on the back side of a groove and performing joint welding from the groove side . Back payment. (I) is a disc-shaped backing. (B) is a rectangular cross-section behind the socket member. FIG. 6 is a diagram showing an application example of a backing metal separation welding method, in which ( a) shows a case where the outer diameter of the diaphragm 1 is substantially equal to the outer diameter of the pillar 5; (B) is a combination of the column 5, the solid dice 32, and the disc-shaped backing plate 40 when the outer diameter of the solid dice 1 is substantially equal to the outer diameter of the column 5. It is a figure which shows an example . It is sectional drawing of the method of the tack welding which combines a disk-shaped backing metal and a diaphragm , (A) is a case where tack welding is carried out inside the hole opened in the center part of a disk-shaped backing metal, (B) shows a case where the outer periphery of the disc-shaped backing metal is temporarily welded. It is a figure which shows the groove setting condition at the time of combining the pillar 5, the diaphragm 1, and the disk-shaped backing metal 40 . It is sectional drawing at the time of applying the backing metal separation welding method using a disk-shaped backing metal to the conventional construction method joint part . It is sectional drawing at the time of applying the backing metal separation welding method using a rectangular cross section backing metal to the conventional construction method joint part . It is sectional drawing at the time of applying the backing metal separation welding method using a disk-shaped backing metal to the joint part using a grooved steel pipe column and a diaphragm with a groove . When the outer diameter of the diaphragm 1 is almost equal to the outer diameter of the column 5, the groove of the separation welding method of the backing metal 40 is set, and after the joint welding of the column 5 is performed, the beam bracket is attached to the diaphragm 1. It is a figure which shows the example which joins and the welded part of the pillar 5 and the welded part of a beam bracket are piled up and integrated . When the outer diameter of the solid die 1 is substantially equal to the outer diameter of the column 5, the column 5, the solid die 32, and the disk-shaped backing plate 40 are used. It is a figure which shows the example which joined the beam bracket to the solid dice 1 after implementing the joint welding of the combination pillar 5. FIG. After applying the welding method using a disc-shaped backing metal to the joint using a steel pipe column with no groove and a diaphragm with a groove and performing joint welding of the column 5, the beam bracket is attached to the column. It is sectional drawing at the time of welding joining to the joint welding of 5. FIG . A disk-shaped backing metal 40 is used for joint welding between the steel pipe column and the diaphragm, and metal powder or a cut wire is filled between the inner surface of the end of the steel pipe column and the outer surface of the disk-shaped backing metal and welded. It is sectional drawing in the case , (a) is a figure which shows the state filled with metal powder or a cut wire , (b) is a figure which shows the state welded . It is sectional drawing of the state which set the ring-shaped backing metal to the steel pipe pillar .

DESCRIPTION OF SYMBOLS 1 Diaphragm of building steel beam-column joint 1A H-shaped steel flange of building steel beam-column joint 1T Thick plate inner diaphragm 1U of building steel beam-beam joint Thin plate inner diaphragm 2 of building steel beam-column joint A short pipe of steel pipe 5. A member composed of 1 and 2 is called a dice. This portion is also referred to as a panel zone.
3 H-shaped steel beam 3A H-shaped steel beam 4 to be joined to the column from different directions 4 H-shaped steel beam flange or beam bracket 4A H-shaped steel beam flange end section 5 Steel tube column 5W Steel tube column and H-shaped steel web Or groove weld or slot weld for attaching a stiffener 6 Welding of steel pipe and diaphragm 7 Welding of beam flange and diaphragm 8 Temporary or assembly welding 9 H-shaped steel beam web 10 Back metal 10A Copper or copper alloy metal 11 Scallop 12 Non-consumable paddle (copper, etc.)
12P Protrusion of non-consumable metallurgy (copper, etc.) 13 Beam flange or steel pipe member 13C Groove cutting position 14 of member 13 Overlay welding 15 applied on the back or surface of the member Overlay weld 14 and base metal Included groove surface 16 Mating member 17 Joint welding 18 Plate thickness or thickness 19 of member 13 Effective throat thickness 20 of welded portion of members 16 and 13 Overlay welding 21 on the side, upper surface or back surface of beam flange Beam stress concentrating portion 22 A groove weld or slot weld 23 for attaching a column made of a steel pipe and an inner diaphragm or an H-shaped steel flange 23 Welding of a steel pipe and an H-shaped steel beam web 24 A through-hole 24A H-shaped steel flange opened at the center of the H-shaped steel flange or the inner diaphragm Or through-hole 25 opened in the corner of the inner diaphragm 25 In-column H-shaped steel web 25A Stiffener 26 Fillet welding or butt joining the flange and the in-column H-shaped steel web Elongate through-holes or slots drilled in contact 27 steel pipe side.
27A Central side of through-hole 27B processed by gas cutting, plasma cutting, laser cutting 27B through-holes opened on the side of the steel pipe, that is, a conical hole 27C opened at the end of the slot. Peripheral slot 28 Thin steel plate 29 A circular arc or elliptical arc 30 at the end of the wide groove in the entire circumferential through groove 30 A stopper used for positioning when setting the H-shaped steel flange or diaphragm in the steel pipe column. The stopper is tack welded into the steel pipe.
31 First layer route welding 32 Solid dice used for beam-to-column joint 34 Shaped groove 35 Base material 36 Back wave bead 37 Welding torch 38 Bead-on-plate welding or placing bead 39 Metal powder, cut wire, coated welding rod or These mixtures 40 Back metal 40D Back metal outer diameter 40D1 Back metal outer diameter 1
40D2 Outer diameter of backing metal 2
40T Back metal thickness 40B Back metal width 41 Back metal test piece Steel pipe gap

Claims (3)

In architectural steel structures,
When butt welding a square steel pipe column or a round steel pipe column to a diaphragm, base plate or solid dice,
The inner surface of the steel pipe column end portions, as 1~5mm in face-to-face distance between the disc-shaped or ring-shaped back receiving metal outer surface can be secured, decide outer diameter and position of the backing bushes, the diaphragm, Temporarily weld the backing plate to the base plate or solid dice side,
A steel column manufacturing method comprising butt welding the steel pipe end and the diaphragm, base plate or solid dice . In architectural steel structures,
When butt welding a square steel pipe column or a round steel pipe column to a diaphragm, base plate or solid dice,
The inner surface of the steel pipe column end portion, as 1~5mm in face-to-face distance between the disc-shaped or ring-shaped back receiving metal outer surface can be secured, decide outer diameter and position of the backing bushes, angular shaped steel Temporarily weld the backing metal to the column or circular steel pipe column side;
A steel column manufacturing method comprising butt welding the steel pipe end and the diaphragm, base plate or solid dice . In the invention according to claim 1 or 2,
At the groove portion of the butt welding, at least the inner surface of the end portion of the steel pipe column and the outer surface of the butt welding backing metal are filled or installed with metal powder, a cut wire, a coated welding rod or a mixture thereof. The steel pipe and the diaphragm, base plate or solid dice are butt welded .

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