JP3106263B2 - Construction method of building frame using filled concrete steel column - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a filled concrete steel.
The present invention relates to a method of constructing a building skeleton using pipe columns, and more particularly to a method of constructing a building skeleton combining steel columns by welding so as to increase the axial load ratio of the filled concrete.

[0002]

2. Description of the Related Art A conventional method of building a building frame using a filled concrete steel tube column is to build a steel tube column at a column forming position of a lower frame and attach a steel beam to each beam mounting portion of the steel tube column. Build the upper steel column on the column, attach the steel beam to the beam mounting part of the upper steel column, build the multi-story building frame , weld the lower steel column and the lower frame , and After joining the lower steel column and the upper steel column by welding or the like, concrete is filled in the steel column to form a filled concrete steel column. In addition, conventional methods of joining a filled concrete steel pipe column to a steel beam such as an H-section steel are roughly classified into an inner diaphragm type and an outer diaphragm type. (1) In the inner diaphragm type steel pipe column 1, for example,
As shown in FIGS. 14 and 15, a long and thin steel plate is bent to form semi-cylindrical bodies 1A and 1B, and the steel plate is cut into a fan shape to form inner diaphragm pieces 2A and 2B. The radius of the arc of the outer circumference of the sector of 2A, 2B is substantially matched with the radius of the arc of the inner circumference of the semi-cylindrical bodies 1A, 1B, and the H-section steel on the inner peripheral surface of the pair of semi-cylindrical bodies 1A, 1B The inner diaphragm pieces 2A, 2B are arranged at respective positions corresponding to the mounting positions of the flanges 4a of the beam 4, and the outer peripheral portions of the inner diaphragm pieces 2A, 2B are welded to the inner peripheral surfaces of the semi-cylindrical bodies 1A, 1B. , A pair of semi-cylindrical bodies 1A, 1B in the longitudinal direction edge 1A1, 1B1 together, these edges 1A1, 1B
1 are welded to each other to form a steel pipe column 1 and an inner diaphragm is formed by a pair of diaphragm pieces 2A and 2B;
In some cases, the gusset plate 3 is welded to the steel tube 4 at the web mounting position of the steel beam 4 on the outer peripheral portion of the steel tube column 1. The steel pipe column 1 is carried into a construction site and is built at a predetermined position. Then, the web 4b of the steel beam 4 is fixed to the gusset 3 of the steel column 1, and then the outer portion of the steel column 1 corresponding to the inner diaphragm 2. Is welded to the flange 4a of the steel beam 4. After the attachment of the steel beam 4 to the steel pipe column 1 is completed, concrete 5 is filled in the steel pipe column 1 to form a filled concrete steel pipe column. (2) As shown in FIG. 16 and FIG. 17, for example, as shown in FIG. 16 and FIG. 17, a steel pipe column 6 is formed by cutting a ready-made steel pipe to a predetermined length, and a steel plate is cut into an annular shape to form an outer pipe. Diaphragms 7A, 7B are formed, a plurality of annular outer diaphragms 7A, 7B are fitted to the steel pipe column 6, and the outer diaphragms 7A, 7B are positioned at positions corresponding to the mounting positions of the flanges 4a of the steel beam 4 of the steel pipe column 6. Let each outer diaphragm 7
A proposal has been made in which the inner peripheral portions of A and 7B are welded to the outer peripheral portion of the steel pipe column 6, and the gusset plate 3 is welded to the web mounting position of the steel beam 4 on the outer peripheral portion of the steel pipe column 6. This steel pipe column 6
Is transported to a construction site, and is built at a predetermined position. Then, the web 4b of the steel beam 4 is fixed to the gusset plate 3 of the steel pipe column 6, and thereafter, the steel frame 4 is attached to the outer portions of the outer diaphragms 7A and 7B of the steel pipe column 6. The flange 4a of the beam 4 is welded. Steel column 6
After the attachment of the steel beam 4 to the steel pipe 4 is completed, concrete is filled in the steel pipe column 6 to form a filled concrete steel pipe column.

[0003]

A conventional method of building a building frame using filled concrete steel pipe columns is to build a multi-story building frame and weld the steel pipe columns and the like to each other by welding or the like. Since the inside of the steel pipe column is filled with concrete, an axial force acts on the steel pipe column from the beginning, and there is a drawback that the axial load burden ratio of the filled concrete of the filled concrete steel pipe column is small. Further, the inner diaphragm type (1) has an effect that the bending moment between the steel beam 4 and the steel pipe column 1 is well balanced, and the vertical force acting on the steel beam 4 is reduced by the filling concrete in the steel pipe column 1. Has an effect of being transmitted as an axial force, and is structurally rational. However, in order to fix the diaphragm inside the steel pipe column 1 corresponding to the beam mounting position, the outer peripheral portions of the inner diaphragm pieces 2A, 2B are welded to the inner peripheral surfaces of the semi-cylindrical bodies 1A, 1B, and then a pair of the inner diaphragm pieces 1A, 1B are welded. Semi-cylindrical bodies 1A, 1B Edges 1A1, 1 in longitudinal direction
B1 needs to be combined, and these edges 1A1 and 1B1 need to be welded to each other to form the steel pipe column 1, which causes a cost increase. Further, the outer diaphragm type of (2) is proposed for the purpose of using a relatively inexpensive off-the-shelf steel pipe, and the bending moment of the steel beam 4 and the steel pipe column 6 is balanced by the inner diaphragm type. However, the transmission of the vertical force acting on the steel beam 4 to the filled concrete in the filled concrete steel tubular column 6 is insufficient. In a small building, the vertical force acting on the steel beam is transmitted to the filled concrete by the adhesive force between the inner surface of the steel column and the filled concrete, and the shear force acting on the shear connector provided at the beam mounting position in the steel column. And so on. However, it is very difficult to fix the shear connector to the beam mounting position in the long steel pipe column by welding. A generalized outer diaphragm design method applicable to large-scale buildings has not yet been proposed. Structural design using filled concrete steel pipe columns has the advantage that the column strength can be rationally increased by bearing the axial force on the filled concrete, and there is a great demand for inventions that can fully demonstrate the advantages. The problem to be solved by the present invention is to provide a method of constructing a building skeleton using a filled concrete steel tubular column which does not have the above-mentioned disadvantages of the conventional one, in other words, an axial load burden ratio of the filled concrete. Filling concrete that can increase
An object of the present invention is to provide a building method of a building frame using steel pipe columns.

[0004]

The present invention adopts the following constitution in order to solve the above-mentioned problems. The construction method of a building frame according to the present invention uses a short steel
The column is formed by cutting an existing steel pipe a little longer than the beam
A pair of outer diaphragms are welded to the outside of a short steel column.
The gusset for beam attachment is welded between the outer diaphragms,
Inner die so that there is a central opening inside the short steel tube column
The afram is welded and the inside of the short steel tube column is filled with concrete.
The concrete part inside the short steel column is short
Formed downward and upward from the lower and upper ends of the
A through opening extending vertically in the concrete portion
Is used as a long steel pipe column.
Use a tube formed by cutting a steel pipe
A long steel pipe column and connection structure on the same axis at the column formation position
A short tubular columns are erected alternately, the U-Joint structure
Projects below and above short steel column of concrete part
Is inserted into the end of the long steel column
Between the column and the short steel tube column with the connection
A small gap between the end of the long steel column and the end of the short steel column
Temporarily joined with long intervals, inside long steel tube columns and connection structure
Wherein the through opening of the concrete part is satisfied by the concrete is the filling concrete tubular columns, in the state where the load is applied in the vertical direction to fill the concrete steel Columns,
Except for the spacing means, apply the vertical load to the
After the support state in Nkurito, is characterized in that the coupling by welding together the long steel column end face and the end face of the short tubular columns of Joint constructs. A short steel pipe column is formed, for example, by cutting an existing steel pipe having a circular or square lateral end face longer than a beam, and a long steel pipe column is formed, for example, by cutting an existing steel pipe having a circular or square lateral end face to a predetermined length. And formed.

[0005] In the steel frame portion of the connection structure, a pair of outer diaphragms are welded to the outside of the short steel pipe column, and a gusset for beam attachment is welded between the outer diaphragms, so that the inside of the short steel pipe column has a middle part. to form <br/> formed by welding the inner diaphragm so as to be opened in the central portion. Inner diaphragm that make up an annular or sectorial da Iafura <br/> beam. In addition, the inside of the short steel pipe column is filled with concrete, the concrete portion in the short steel pipe pillar is formed by projecting downward or upward from the lower end and the upper end of the short steel pipe column, and a through-opening extending vertically is formed. When the structure is formed, the work of temporarily connecting the long steel pipe column and the connection structure is facilitated. If the lower part of the vertically extending through-opening of the concrete part is a conical surface that opens downward,
The filling of concrete into long steel tube columns is facilitated. When a plurality of connecting rebars are buried in the concrete part in a short steel pipe column by extending vertically, and the upper and lower parts of these connecting rebars are protruded downward or upward from the lower or upper end of the concrete part long. In addition, it can increase the integration with the post-filled concrete in the long steel pipe column.

As the spacing means, for example, an annular spacing ring made of a material that melts at a relatively low temperature, an annular spacing ring made of a material that becomes a small piece that gives an impact force, and the like are used. Anything that can be removed in any way. When the spacing ring is used, the outer periphery thereof may be protected by a protective band which can be divided into a plurality of pieces as necessary. A long steel pipe column is, for example, (a) its longitudinal dimension reduced to the floor height dimension minus the longitudinal dimension of the short steel column of the connection structure, and (b) its longitudinal dimension. The length obtained by subtracting the longitudinal dimension of the short steel column of the connection structure from twice the floor height dimension, and (c) the length of the short steel column of the connection member being three times the floor height dimension It is possible to use a reduced size or the like. In cases (b) and (c), a pair of annular bodies serving as outer diaphragms are fitted at positions 1 or 2 corresponding to the mounting position of the steel beam of the long steel pipe column, and each annular body is welded to the column steel frame. A gusset for beam attachment, which serves as an attachment portion for a steel beam web, is welded between the pair of annular bodies. As the beam to be attached to the beam attachment portion of the connection structure, for example, a steel frame beam or a steel reinforced concrete beam having a steel frame portion exposed at an end is used. In the present invention, the connection structure, the long steel pipe column and the beam can be unitized and factory-produced.

[0007]

Embodiment 1 Embodiment 1 will be described with reference to FIGS. As shown in FIG. 4 and FIG.
Short steel tube column 11, annular body 1 constituting outer diaphragm
2. Annular body 13 and steel beam 40 constituting the shear connector
Gussets 14 and concrete portions 16 and the like, which serve as web mounting portions. As shown in FIGS. 1 and 2, the short steel pipe column 11 is formed by cutting a ready-made steel pipe having a circular cross section to a length equal to or longer than a beam, and forming upper and lower end faces 11 thereof.
Let a be a conical surface. The gusset 14 is manufactured by cutting a steel plate to the width of the web of the steel beam 40. The outer annular body 12 is constituted by an annular body made of a steel plate, and forms a linear portion on the periphery of the annular body 12, and this portion is attached to the flange mounting portion 12 of the steel beam 40.
a. Fitting a pair of annular body 12 to the outside of the tubular columns 11, in accordance with the RyoNaru of steel beam 40, welded to the steel pipe column 11. A pair of annular bodies 12 corresponding to the mounting position of the steel beam 40
The gusset 14 is welded to the outer surface of the steel pipe column 11 between the two.
The inner annular body 13 is constituted by an annular body made of a steel plate.
Is fitted inside the center of the short steel pipe column 11 at right angles to the axial direction thereof, and welded to the steel pipe column 11. And it is set as the steel-frame part 10A of the connection structure 10 shown in FIG.1 and FIG.2.
Incidentally, each fitted with a ring member 13 to the inner position of the steel pipe column 11 corresponding to the pair of annular body 12, each annular body 13 steel pipe
It may be welded to the column 11 to form the steel frame portion 10A of the connection structure 10 as shown in FIG. A short steel column 11 having a steel frame portion 10A is erected on a lower mold having a circular cylindrical portion, and an upper mold having a cylindrical portion is placed on the steel column 11, and as it goes down, A core having a conical portion having a large diameter and a columnar portion above this portion is erected at the center in the short steel tube column 11, the upper mold frame and the lower mold frame to form a molding die. A plurality of connecting rebars 15 are annularly arranged between the short steel pipe column 11 and the core of the forming die, and upper and lower ends of these connecting rebars project upward and downward from the upper and lower molds. Let it. Then, concrete is poured into the molding die, and the joint structure 10 shown in FIGS. 4 and 5 is manufactured.

The connection structure 10 shown in FIG. 4 and FIG.
The concrete portion 16 projects upward and downward from the upper and lower ends of the steel pipe column 11. The outer diameter of the protruding concrete portion 16a is slightly smaller than the inner diameter of the steel pipe column 11, and the protruding length of the concrete portion 16a allows the concrete portion 16a to be fitted to the upper and lower portions of the long steel pipe column 21 described later. The length is such that the fitting does not come off easily. The diameter of the through-opening 16b formed at the center in the concrete portion 16 is set to a size that allows the long steel pipe column 21 to be filled with concrete. The through opening 1
The lower part of 6b has a conical surface 16c that opens downward, facilitating the filling of the long steel tube column 21 with concrete. In the protruding concrete portion 16a of the connection structure 10,
As shown in FIG. 8, the upper and lower end faces of the short steel tube column 11 are brought into contact with each other, and the annular spacing member 17 is fitted and fixed.
Interval holding ring 17 is shown in FIGS. 6 and 7, a relatively material that melts at low temperatures, the impact force produced by the material to be small pieces to give the end face 17a of the upper and lower short length tubular columns 11,
The upper and lower end surfaces 21a and 21a of the 21 are conical surfaces. If necessary, a protective band 18 is fitted around the outer periphery of the spacing ring 17 to prevent accidental destruction of the spacing ring 17. The protection band 18 is formed of an arc-shaped plate in which each band piece 18a is formed by dividing a short cylinder having an inner peripheral surface that matches the outer peripheral surface of the steel pipe columns 11 and 21 into four equal parts, and ear pieces formed at both ends thereof. 1
8a ₁ is formed in a ring shape by fixing it with an appropriate detachable fixing tool such as a bolt and a nut. The long steel pipe column 21 is formed by cutting a ready-made steel pipe having a circular cross section into a dimension obtained by subtracting the length of the short steel pipe column from the floor height dimension,
The upper and lower end surfaces 11a are formed as conical surfaces.

Next, a description will be given of a construction method for constructing a building frame using the connection member 10 and the long steel pipe columns 21. As shown in FIG. 9, a column mounting portion 25 made of a steel pipe having a short lower frame is used.
A first long steel pipe column 21 is erected on the slab, and a gusset 25 a at the upper end of the column mounting portion 25 and a gusset 21 b at the lower end of the first long steel pipe column 21 are temporarily connected using the connecting plate 24. First
Hoisting the port structure 10 by an appropriate hoisting means,
The concrete portion 16a projecting downward from the first connection member 10 is fitted to the upper end of the first long steel pipe column 21. Then, the steel beam 4 is inserted between the annular bodies 12 of the first connection structure 10.
0, and the end of the steel beam 40 is temporarily attached to the gusset 14 of the first connection member 10 by using an attachment plate, a bolt and a nut, or the like. Then, concrete is filled into the first long steel pipe column 21 and the opening 16b from the upper end of the opening 16b of the concrete portion 16 of the first joint structure 10, and the concrete portion 16 of the joint structure 10 and the steel pipe are filled. Pillar 2
1 and the concrete portion 26 in the opening 16b. In a similar manner, as shown in FIG.
The lower end of the second long steel pipe column 21 is fitted to the concrete portion 16a protruding above the first connection structure 10, and the first
A second long steel pipe column 21 is erected on the connection structure 10 of FIG. Similarly, a concrete portion 16a projecting downward from the second connection structure 10 is fitted to the upper end of the second long steel pipe column 21. A steel beam 40 is arranged between the annular bodies 12 of the second connection structure 10, and the end of the steel beam 40 is temporarily attached to the gusset 14 of the connection structure 10 by using an attachment plate, a bolt, a nut, or the like. do. Similarly, from the upper end of the opening 16b of the concrete portion 16 of the second connection structure 10, the second long steel pipe column 2
1 and the opening 16b are filled with concrete, and the concrete portion 16 of the second connection structure 10 and the concrete portion in the second steel pipe column 21 and the opening 16b are integrally joined.

In the same manner, third and fourth long steel pipe columns, third and fourth connection members, steel beams and the like are assembled, concrete is sequentially filled, and a multi-layer building frame is formed. Build and go. At an appropriate time, the flange at the end of the steel beam 40 is attached to the attachment portion 12 of the annular body 12 of the first connection member 10.
Weld to a. The work of integrating the short steel column 11 and the long steel column 21 of the connection member 10 by filling the concrete 26 may be performed for each floor as described above, or may be performed for every two to four floors. Is also good. In addition, when the temporary connection only by fitting the protruding concrete portion 16a of the connection structure 10 to the long steel pipe column 21 is insufficient in strength,
As shown in FIG. 1 0, detachably connected with the connecting plate 24 and the gusset 11b welded to the end portion of the gusset 21b and short steel column 11 which is welded to an end portion of a long tubular columns 21,
Complete the temporary connection. After the upper building frame was constructed and a vertical load was applied to the filled concrete steel column 20, the connecting plate 24 was used for the short steel column 11 and the long steel column 21 of the connection structure 10. In this case, the connecting plate 24 is first removed, and when the protective band 18 is used, the protective band 18 is removed.
Is melted or broken by an impact force to remove it, and as shown in FIG. 12, the vertical load acting on the filled concrete steel pipe column 20 is supported only by the concrete portions 17 and 26. Then, a gap g formed by the end face 11a of the short steel pipe post 11 and the end face 21a of the long steel pipe post 21 is filled with a welding steel material that has been melted, and the end face of the short steel pipe post 11 and the end face of the long steel pipe post 21 are joined. They are permanently joined to each other by welding. Further, the connection plate 24 was removed from the long steel pipe column 21 and the column mounting portion 25 of the lower frame, and the gap g between the end surface 21a of the long steel pipe column 21 and the upper end surface of the pipe of the column mounting portion 25 was melted. Long steel pipe column 2 filled with welding steel
1 and the column mounting portion 25 are permanently connected to each other by welding. In addition, if necessary, a heat insulating material layer 19 is buried around the concrete portion 16 corresponding to the inner peripheral surfaces of the steel pipe columns 11 and 21 in the vicinity of the welded portion. Not to be. The short steel column 11 and the long steel column 21 (and the long steel column 21 and the column mounting portion 2)
Since the welded part with 5) shrinks due to cooling after welding,
The portion near the welded portion of the steel pipe columns 11 and 21 is in a state where a contraction force is applied, and the axial load burden ratio of the filled concrete of the filled concrete concrete steel pipe column 20 increases. Therefore, even if a large vertical load acts on the filled concrete steel pipe column 20 after the completion of the building, there is no possibility that the steel pipe columns 11 and 21 will buckle.

The second embodiment is an example in which the same structure as in the first embodiment is used as the connection member 10 and the long steel pipe column 31 is longer than the floor height. As the long steel pipe column 31, the length in the longitudinal direction thereof is set to be twice as large as the height of the floor.
FIG. 13 shows an example of using a steel pipe column 11 having a reduced length in the longitudinal direction. Long steel tube column 3
As 1, it is also possible to use, for example, a size obtained by subtracting the length in the longitudinal direction of the short steel tube column 11 of the connection structure 10 from three times the height of the floor. A pair of plate-shaped annular bodies 32 are fitted at positions 1 or 2 corresponding to the attachment positions of the steel beam of the long steel pipe column 31, each annular body 32 is welded to the steel pipe column 31, and the pair of annular bodies 32 A gusset 33 serving as a web attachment portion of the steel beam 40 is welded therebetween, as shown in FIG. The annular body 32 and the gusset 33 have the same configuration as the annular body 12 and the gusset 13 of the first embodiment.
A first long steel pipe column 31 is erected on a column mounting portion 25 made of a steel pipe of a lower frame, and a gusset 25a at an upper end of the steel pipe of the mounting steel pipe 25 and a gusset 31b at a lower end of the first long steel pipe column 31.
Are temporarily connected using the connecting plate 24. The beam steel structure 40 is arranged between the annular bodies 32 of the plurality of first long steel pipe columns 31, and the web at the end of the beam steel structure 40 is attached to the gusset 33,
Temporarily mount using nuts. Then, the first connection member 10 is lifted by an appropriate lifting means, and a concrete portion 16a projecting downward from the first connection member 10 is fitted to the upper end of the first long steel pipe column 31. A steel beam 40 is arranged between the annular bodies 13 of the first connection member 10, and the web at the end of the steel beam 40 is attached to the gusset 13 of the first connection member 10, with a siding plate, a bolt, a nut, and the like. Temporarily mount using. At an appropriate time, the flange at the end of the steel beam 40 is welded to the attachment portion of the annular bodies 12 and 32.

Concrete is filled into the first long steel pipe column 31 and the opening 16b from the upper end of the opening 16b of the concrete portion 16 of the first joint structure 10, and the concrete portion 16 of the joint structure 10 and the steel pipe are filled. Pillar 31 and opening 1
6b and the concrete part 26 in FIG. In a similar manner, the second and third long steel pipe columns 31, the second and third connection members 10, the steel beams 40 and the like are assembled, concrete is sequentially filled, and a multi-layer building frame is formed. Build and go. The method of using the spacing means, the method of the main connection by welding, and the like are the same as those in the first embodiment, and thus the description thereof will be omitted. According to the second embodiment, the number of the joint members 10 can be reduced, and the number of welded portions can be reduced. In Examples 1 and 2,
At the time of building, the connection structure 10 and the long steel pipe columns 21, 31
Although the example of assembling (temporary joining) has been described, the connecting member 10 and the long steel pipe columns 21 and 31 may be temporarily joined before being built. In this case, the gusset and specifications mouth structure 10 short tubular columns 11 and long tubular columns 21 and 31, be left temporarily coupled to via interval holding ring 19 using connecting means detachably connecting plate such as Good. In this way, the erection work and the joining work are facilitated.

[0013]

According to the present invention, the following effects (a) to ( e ) can be obtained by providing the structure described in the claims. (A) The construction method of the building frame according to claim 1 is as follows:
The operation and effect of Short steel pipe as the connection structure
The column is formed by cutting the existing steel pipe a little longer than the beam
A pair of outer diaphragms are welded to the outside of a short steel column.
The gusset for beam attachment is welded between the outer diaphragms,
Inner die so that there is a central opening inside the short steel tube column
The afram is welded and the inside of the short steel tube column is filled with concrete.
The concrete part inside the short steel column is short
Formed downward and upward from the lower and upper ends of the
A through opening extending vertically in the concrete portion
Is used as a long steel pipe column.
Use a tube formed by cutting a steel pipe
From there, a long steel pipe columns and short steel column of the Joint structure
It can be easily formed by cutting the existing steel pipe, and the inner diaphragm
Special welding equipment is used because the steel pipe column for welding the
Easily place inner diaphragm on inner circumference of short steel tube column
Can be welded, and simple cutting, welding, etc.
The connection structure and the long steel pipe column can be provided at low cost.
Long steel pipe column and short joint structure on the same axis at the column formation position
Steel pipe columns are built alternately, and the concrete
Projecting below and above the short steel column
Part fits into the end of the long steel column,
The length of the short steel pipe column with the connection structure is long using the spacing means
Make a small gap between the end of the steel column and the end of the short column.
Since they are temporarily joined while maintaining the distance,
Work becomes easier.

A long steel column and a short steel column with a connection structure
Is temporarily connected with a small gap using the spacing means.
The concrete in a long steel tube column and in the connection structure
The inside of the through opening of the part is filled with concrete and the filling
It is assumed to be a cleat steel pipe column,
In the direction where the load in the direction acts, and remove the spacing means.
To support the vertical load with concrete in each steel pipe column.
The end of the long steel pipe column and the short
In order to permanently join the end faces of steel pipe columns to each other by welding,
Welded parts is contracted by cooling after welding, the welding portion of each steel column is ready to shrinkage force is applied, filled concrete
The axial load burden ratio of the concrete filled with the steel pipe column can be increased. Therefore, after the building is completed,
Even if a large vertical load is applied to
There is no danger of tube columns buckling. Long steel column and connection configuration
Short gaps are made between short steel pipe columns using spacing means.
And is temporarily connected to the inside of the long steel pipe column and the connection structure.
Filling concrete filled with concrete inside the through opening
It is considered to be a steel pipe column, and the vertical load is
After the weight has been applied, remove the length
Between the end face of the steel pipe column and the end face of the short
The shape of the gap suitable for welding because the main connection is made by welding
After completion of the building, long steel pipe columns and
In a state where the short steel tube column of the mouth structure is joined by welding
Because it has become the steel part of the filled concrete steel pipe column
Acting vertical load on the short steel column of the joint
Through the diaphragm inner welded to the inner side, filled con
Can be reliably transmitted to cleats.

[0015] (b) structure of the building structures of the invention according to claim 2
In the construction method, the effects and effects of (a) above
Not only can you achieve the same effect,
The effect of the invention can be obtained. As long steel tube columns
Then, the existing steel pipe is cut to a predetermined length, and
A pair of outer diaphragms are welded to the beam mounting part of
Gussets for beam mounting are welded between the pair of outer diaphragms
One or two beams of long steel tube columns
Internal dies are installed inside the steel pipe column corresponding to the mounting part.
Since there is no need to weld the afram, the length of the beam
It is easy to manufacture steel pipe columns and offers long steel pipe columns at low cost.
it can. (C) The connection structure of the invention according to claim 3 is a short steel pipe column.
Is formed by cutting the existing steel pipe a little longer than the beam,
A pair of outer diaphragms are welded to the outside of the short steel column,
Gusset for beam mounting is welded between outer diaphragms, short
Inner diaphragm so that there is an opening at the center inside the steel tube column
The ram is welded and the inside of a short steel column is filled with concrete
The concrete section inside the short steel column is below the short steel column.
Formed protruding downward and upward from the end and upper end,
The concrete part has a through opening extending vertically.
As a result , not only can concrete be easily filled into the long steel pipe column through the through-opening of the concrete part in the short steel pipe column of the connection structure ,
(B) Has the same function and effect as and
be able to. (D) According to the joint structure of the invention according to claim 4, the concrete portion in the short steel tube column and the concrete portion to be post-cast in the long steel tube column can be strongly integrated by the connecting rebar. . (E) According to the present invention, it is possible to easily construct a building frame having a filled concrete steel pipe column in which the axial load burden ratio of the filled concrete is large and the steel pipe column is not likely to buckle.

[Brief description of the drawings]

FIG. 1 is a plan view of a steel frame portion of a connection structure according to a first embodiment.

FIG. 2 is a front view of FIG. 1 taken along the line AA and viewed in the direction of the arrow;

1. FIG. 3 is a front view of a steel frame part of a connection structure different from that of FIG. 1 taken along the same line as the line AA in FIG.

FIG. 4 is a plan view of a connection structure according to the first embodiment.

FIG. 5 is a front view of FIG. 4 taken along the line AA and viewed in the direction of the arrow;

FIG. 6 is a plan view of a spacing ring and a protection band according to the first embodiment.

FIG. 7 is a front view of FIG. 6 taken along the line BB and viewed in the direction of the arrow;

FIG. 8 is a front view in which the gap holding ring is fitted and the connection structure is sectioned along the same line as the line AA in FIG. 4;

FIG. 9 is a front view of a state in which a connection member is connected to a long steel pipe column built on the lower frame of the first embodiment along the line AA in FIG. 4;

FIG. 10 is a front view in which a temporary connecting portion between a long steel pipe column and a connection member is longitudinally cut;

FIG. 11 is a front view showing a state where two long steel pipe columns and a connection member of the first embodiment are connected to each other along the line AA in FIG. 4;

FIG. 12 is a front view in which a connecting portion between a long steel pipe column and a connection structure without a spacing member is cut along a line AA in FIG. 4;

FIG. 13 is a front view in which the long steel pipe column of Example 2 and the joint structure are combined and cut along the line AA in FIG. 4;

FIG. 14 is a front view showing a method for manufacturing a conventional filled concrete steel pipe column.

FIG. 15 is a plan view of the one in FIG. 14;

FIG. 16 is a front view showing another conventional method of manufacturing a filled concrete steel pipe column.

FIG. 17 is a plan view of the one in FIG. 16;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Connection structure 10A Steel part of connection structure 11 Short steel pipe column 12 Ring body 13 Ring body 14 Gusset 15 Connecting rebar 16 Concrete part 16a Projected concrete part 16b Through-opening 16c Conical surface 17 Spacer 18 Protective band 19 Insulation layer 21 Long steel pipe column 24 Connecting plate 25 Column mounting part 26 Concrete part 31 Long steel pipe column 32 Ring body 33 Gusset 40 Steel beam g Gap

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) E04B 1/30 E04B 1/22

Claims (4)

(57) [Claims] (1) A steel pipe having a short steel pipe column as a connection structure.
A short steel pipe column formed by cutting the pipe slightly longer than the beam
A pair of outer diaphragms is welded to the outside of the
Gussets for beam mounting are welded between the rams, and
The inner diaphragm is welded so that an opening is formed in the center at the side
The inside of a short steel pipe column is filled with concrete,
The lower and upper ends of steel pipe columns with short concrete sections
The contact is formed to protrude downward and upward from the end, and
A through-opening extending vertically is formed in the rear part.
The existing steel pipe is used as a long steel pipe column.
Using a steel pipe column that is cut to length , a long steel pipe column and a short steel pipe column of the joint structure on the same axis at the column formation position
Are alternately erected, and the concrete portion of the joint structure is
The lower and upper protruding parts of the short steel column
A long steel column and connection structure fitted inside the end of a steel column
The end of the short steel column is shorted by using the spacing means.
Temporary connection with a small gap between the surface and the end face of the short steel pipe column, and
Over root section of the through opening is a has been filled concrete tubular columns meet in concrete, a load in the vertical direction to fill the concrete steel pillars in a state to act, the interval holding means
Except for the vertical load, which is supported by concrete in each steel pipe column.
After the lifting state, the end face of the long tubular columns Joint structure
A method for constructing a building skeleton , characterized in that the end faces of short steel pipe columns are permanently joined to each other by welding. 2. A steel pipe having a short steel column as a connection structure.
A short steel pipe column formed by cutting the pipe slightly longer than the beam
A pair of outer diaphragms is welded to the outside of the
Gussets for beam mounting are welded between the rams, and
The inner diaphragm is welded so that an opening is formed in the center at the side
The inside of a short steel pipe column is filled with concrete,
The lower and upper ends of steel pipe columns with short concrete sections
The contact is formed to protrude downward and upward from the end, and
A through-opening extending vertically is formed in the rear part.
The existing steel pipe is used as a long steel pipe column.
Cut to length and attach a pair of outer
The ear diaphragms are welded between their outer diaphragms
A steel tube gusset is welded to the column, and a long steel tube column and a short steel
And tubular column is built in alternating, short steel pipe in pillarless Joint structure
Projects below and above short steel tube columns in concrete sections
Part of the long steel tube column
The pipe column and the short steel pipe column of the connection structure are temporarily connected to each other with a small gap between the end face of the long steel pipe column and the end face of the short steel pipe column using spacing means, and the inside of the long steel pipe column and the short steel pipe are used.
The through openings of the concrete portion of the pillar is a compacting concrete tubular columns being met with concrete, a load in the vertical direction to fill the concrete steel pillars in a state to act,
After the vertical load is supported by concrete inside each steel pipe column except for the spacing means, the end face of the long steel pipe column and the end face of the short steel pipe column of the connection structure are permanently joined to each other by welding. Construction method of building frame characterized by the following. 3. A short steel pipe column is formed by cutting an existing steel pipe a little longer than a beam, a pair of outer diaphragms are welded to the outside of the short steel pipe column, and a beam mounting gusset is welded between the outer diaphragms. , the opening in the central portion on the inner side of the short steel column
The inside diaphragm is welded so that the inside of the short steel column is filled with concrete, and the concrete portion in the short steel column is formed to protrude downward and upward from the lower end and the upper end of the short steel column. A connection structure, wherein a through opening extending in a vertical direction is formed in a concrete portion. 4. A concrete portion in a short steel tube column is embedded with a plurality of connecting reinforcing bars extending in a vertical direction, and a lower portion and an upper portion of the connecting reinforcing bar extend downward or upward from a lower surface or an upper surface of the concrete portion. The joint structure according to claim 3 , wherein the joint structure protrudes long.