JPH07292771A - Column-beam connective structure and method therefor - Google Patents

Abstract

PURPOSE:To perform joining between a column and a beam easily and firmly without installing any reinforcing member. CONSTITUTION:A wall thickness part 11a by means of induction heating and compression is installed in a part in the longitudinal direction of a steel pipe column 11, and an end part of a rolled steel beam 12 is bolted to this wall thickness part 11a of the column 11. This joining between the end part of the beam 12 and the wall thickness part 11a of the column 11 is carried out via a pair of split tees 13 bolted each to the wall thickness part 11a and vertical flanges 12a of the beam 12, but it may be done via an end plate of the beam. In addition, a one-side bolt may be used to a bolt 15 being inserted through the steel pipe column 11. In this connection, the joining of the end aprt of the beam 12 to the wall thickness part 11a of the column 11 may be done by means of welding as well.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a column / beam joint structure and a joint method in a steel frame building using steel pipe columns.

[0002]

2. Description of the Related Art Generally, as a column or a beam of a building structure, a steel strip having a constant cross section in the axial direction or a metal strip such as a shaped steel is widely used. When these metal strips are used as columns, various reinforcing members are provided in the portion where the beam is attached in order to secure strength. For example, the pillar is a square steel pipe and the beam is H
When it is made of shaped steel, a structure in which a reinforcing diaphragm is provided inside the column at a position corresponding to the height of the upper and lower flanges of the beam, or a reinforcing metal is overlapped on the outer periphery of the column is generally adopted. In addition, the beam joint portion of the column may be formed of a joint box. When the pillar is made of H-shaped steel, the structure is such that a metal such as a reinforcing plate or an angle member is interposed between both flanges of the pillar at positions corresponding to the heights of the upper and lower flanges of the beam. However, such a structure in which the reinforcing member is provided has a problem of increasing the number of work steps. Also, in the case of a structure in which the diaphragm is installed inside the pillar, the diaphragm can be installed only at the end of the pillar, so it is necessary to use pillars separated for each floor of the building, and use through pillars. I can't. As a measure to solve such a problem, in a square steel pipe column, a thick portion that bulges on the inner surface side of the beam joint portion is formed, and a screw hole is formed in the thick portion,
There is proposed a structure in which a pillar and a beam are joined by screwing a high-strength bolt inserted through an end plate at the end of the beam into the screw hole (Japanese Patent Laid-Open No. 3-212533). The thick wall portion is formed by a method such as centrifugal casting or welding by facing a grooved steel having an intermediate buildup. However, casting is expensive, and face-to-face welding is unreliable in terms of strength.

An object of the present invention is to provide a column-beam joint structure and a joint method capable of easily and firmly joining a column and a beam without providing a reinforcing member.

[0004]

In the column-beam joint structure according to claim 1 of the present invention, a thick portion by heating and compression is provided in a part of the longitudinal direction of the steel pipe column, and the thick portion of the steel pipe column is provided. The end of a beam made of shaped steel is bolted to. As a heating method for forming the thick portion, induction heating, heating with a laser beam, or the like can be adopted. The joining of the end portion of the beam and the thick portion of the steel pipe column is performed through a pair of split tees that are bolted to the thick portion and the upper and lower flanges of the beam, respectively, and through the end plate of the beam. You can go. Moreover, you may use a one side bolt for the bolt inserted in a steel pipe pillar. In this specification, "one side bolt" means
It is a generic term for a shaft-shaped tightening fitting that can be tightened by plastically deforming the head into a diameter-expanded state at the other end by operation from one end, and is also called a blind bolt.

In the column-beam joint structure according to claim 5 of the present invention, a thick portion by heating and compression is provided in a part of the longitudinal direction of the steel pipe column, and the beam made of shaped steel is provided in the thick portion of the steel pipe column. Is welded at the end. The portion of the beam that is welded to the steel pipe column may be a bracket made of shaped steel that is a part of the beam. Further, in each of the above-described column-beam joint structure, the thick-walled portion of the steel pipe column may be provided at two locations by being positioned at heights corresponding to the upper and lower flanges of the beam. Further, instead of the steel pipe pillar, a pillar in which a thick portion by heating and compression is provided in a shaped steel other than the steel pipe may be used. In addition, the steel pipe column is a through column extending over multiple floors of the building, the thick portions are provided at positions corresponding to each floor, and the thickening ratio of the thick portion to the non-thick portion is higher in the thick portion of the upper floor. You may make it smaller than the thick part of the lower floor.

According to a tenth aspect of the present invention, there is provided a column-beam joining method in which a portion of a steel pipe column member in the longitudinal direction is induction-heated and the heated portion is compressed in the column member longitudinal direction to form the column member. The process of forming a locally thick part, the process of erection of the pillar material in which this thick part is formed, and the end of the beam made of shaped steel in the thick part of this built-in pillar material. And a process of bolting the same.

According to the eleventh aspect of the present invention, in the column-beam joining method, a portion of a steel pipe column member in the longitudinal direction is induction-heated, and the heated portion is compressed in the column member longitudinal direction to form the column member. The process of forming a locally thick wall, the process of welding the end of a bracket made of shaped steel that forms a part of the beam to the thick wall of this pillar, and the welded pillar of this bracket It is a method including a step of inserting and a step of joining an end portion of a beam member made of shaped steel to the bracket of the built-in pillar material. In each of the joining methods described above, the thick-walled portion of the steel pipe column may be provided at two positions separately at positions corresponding to the upper and lower flanges of the beam.

[0008]

According to the column-beam joint structure of the invention of claim 1, since the portion of the steel pipe column to be joined to the shaped steel beam is a thick portion formed by heating and compression, the steel pipe column is not provided with a reinforcing member. The steel beam can be firmly bolted. Therefore, the number of bolts is small and the number of bolt tightening steps can be reduced. In particular, since the thick portion is a portion integrally formed with the steel pipe by heat compression, unlike a portion where, for example, grooved steel is faced and welded, the quality is stable and the reliability is high. Further, the thick-walled portion can be formed easily and inexpensively as compared with centrifugal casting. Also in the case of the column-beam joint structure according to the invention of claim 5, since the portion of the steel pipe column to be joined to the shaped steel beam is composed of a thick portion, the steel pipe column and the shaped steel beam can be formed without providing a reinforcing member. Can be joined firmly. Therefore, the beam joining work can be easily performed. In this case as well, since the thick portion is a portion integrally formed with the steel pipe by heat compression, the quality is stable, reliable joining can be performed, and the thick portion can be formed at low cost. The thick part can be formed at the middle height of the pillar,
Since it is not necessary to provide the reinforcing member inside, the beam can be firmly joined even at the intermediate height position of the column. Therefore, the steel pipe pillar can be a single through pillar extending over a plurality of floors. Further, even if a thick portion for joining beams on a plurality of floors is formed in a steel pipe column, no trouble occurs in joining the beams. When the through-column is used, if the thickening ratio of the thick part on the upper floor is smaller than that of the thick part on the lower floor, the material of the thick part is less wasted. That is, since the load acting on the beam-to-column joint of the column becomes smaller toward the upper floor, the amount of material used is appropriate according to the required load. When the section of the beam to be welded to the steel tube column is a bracket made of shaped steel, for example, the steel tube column with the bracket welded at the factory is transported on site, and after the installation, the beam is bolted or riveted together with the attachment plate etc. You can According to the joining method of the inventions of claims 10 and 11, since the locally thick wall portion is formed in the steel pipe column member by induction heating and compression, a thick wall portion of stable quality can be formed. The steel pipe column and the shaped steel beam can be firmly bolted to each other. According to this method of heating and compression, a simpler equipment is required as compared with centrifugal casting or the like, and a thick portion having higher reliability in strength can be formed as compared with the one in which the grooved steels are welded by facing each other. Further, it is possible to obtain high productivity as compared with the conventional method of welding the joint box.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. In this column-beam joint structure, a thick-walled portion 11 in which the wall thickness of the tube wall is integrally thickened by a thick-walling process described later by induction heating and compression as a through-column
By using a part of a formed in the longitudinal direction, the end part of the beam 12 made of shaped steel is bolted to the thick part 11a of the steel pipe column 11 via the split tee 13. The thick portion 11a has a height range that extends slightly above and below the height range in which the beam 12 and the split tee 13 are provided, and the tube wall swells in and out. The thick portion 11a
2 may bulge only on the outer surface side of the steel pipe column 1 as shown in FIG. 2 (A), or may bulge only on the inner surface side as shown in FIG. 2 (B).

The beam 12 is made of H-shaped steel, and the horizontal piece 13a of the split tee 13 is joined to the upper and lower flanges 12a of the beam 12 with high-strength bolts 14 and nuts. The standing piece portion 13b of the split tee 13 is joined to the screw hole 16 formed in the thick portion 11a of the steel pipe column 11 with a high-strength bolt 15. The periphery of the screw hole 16 of the thick portion 11a may be hardened by a heat treatment, and thereby the joint strength can be improved.
A bolt insertion hole may be provided in place of the screw hole 16, and the split tee 13 may be joined by a bolt and a nut inserted in this hole. The bolts and nuts can be similarly used in each of the following embodiments.

FIG. 3 is a process drawing showing a method of joining the above-mentioned pillar / beam joined body. That is, the steel pipe 1 shown in FIG.
Is processed into a steel pipe column 11 having a thick portion 11a in a part in the longitudinal direction as shown in FIG. 3 (B) by thick wall processing by induction heating and compression, and this steel pipe column 11 shown in FIG. Thick part 1 of the steel pipe pillar 11 that was built in the building site
The end portion of the beam 12 is bolted to the la through the split tee 13 as shown in FIG.

According to this structure, since the portion of the steel pipe column 11 to be joined to the beam 12 is formed of the thick portion 11a, the steel pipe column 11 and the beam 12 are firmly fixed by the split tee 13 without providing a reinforcing member. Can be bolted to. Therefore, the step of attaching the reinforcing member is not necessary, the construction is simple, the number of bolts is small, and the number of bolt tightening steps can be reduced, thereby shortening the construction period. Moreover, the steel pipe column 11 can be a single through column without a joint, and since it is made of steel pipe, the cost can be reduced as compared with the case of casting.

FIG. 4 is a sectional view schematically showing an example of a processing apparatus used for performing the thick wall processing by the induction heating and the compression. In FIG. 4, of the steel pipe 1 to be thick-walled, the end of the thickened steel pipe portion 1 a located behind the heating unit 2 in the traveling direction of the heating unit 2 is fixed in place by a stopper 3.・ Retained. The end portion of the steel pipe portion 1b of the steel pipe 1 which is located on the front side and has not yet been thickened is compressed and fed by the compression device 4. The compression device 4 includes a clamp 5 that holds one end of the steel pipe 1, a hydraulic cylinder 6 that moves the clamp 5, a hydraulic device 7, a compression amount detector 8 that detects the moving position of the clamp 5, and the like. The hydraulic device 7 includes a servo valve for controlling the flow rate of the pressure oil supplied to the hydraulic cylinder 6 and a control device for the servo valve, and the position of the clamp 5 and its moving speed are arbitrarily adjusted by the control of the servo valve. It is possible. The heating device 9 is an annular body capable of locally inductively heating a small region in the longitudinal direction of the steel pipe 1 to a plastically deformable temperature to form the heating unit 2, and a high frequency heating coil is used here. This heating device 9 is provided with a passage for a cooling medium 10 such as cooling water inside and the cooling medium 1
A discharge hole for spraying 0 to the rear end portion in the moving direction of the heating unit 2 is provided. The moving device 30 is for moving the heating device 9 in the longitudinal direction of the steel pipe 1, and includes a moving table 31 that holds the heating device 9 and moves, a ball screw 32 that moves the moving table 31, and a ball thereof. Drive motor 33 for rotating screw 32, and drive motor 3 thereof
A heating device position detector 34 and the like for detecting the position of the movable table 31, that is, the position of the heating device 9 in the longitudinal direction of the steel pipe 1 from the rotational position of 3, are provided. The drive motor 33 used here is a motor whose rotation speed can be freely controlled. Therefore, the moving speed of the heating device 9 can be freely changed by changing the rotation speed of the drive motor 33. The moving table 31 is equipped with a power supply device (not shown) for energizing the heating device 9. In the power supply device used here, the heating device 9 is the heating part 2 of the steel pipe 1.
It is configured such that the effective supply amount per unit time can be controlled. The thick-walled processing device of FIG. 4 is controlled by the control device 35. The control device 35 controls the compression feed speed V of the steel pipe 1 by the compression device 4, that is, the compression speed V, and the moving speed of the heating device 9 by the moving device 30, that is, the heating portion 2 for the steel pipe portion 1 a located behind the heating portion 2.
It is provided with a function of performing program control so that the relative moving speed W of the above item changes in accordance with a predetermined characteristic curve set in advance.

Next, a method of thick-wall machining performed by using the thick-wall machining apparatus having the above structure will be described. Now, with respect to the steel pipe 1 before thickening, the wall thickness starts to increase from the position P ₁ and gradually increases, and the wall thickness increases from the position P ₂ to the position P ₃ so as to be constant. and, thereafter, gradually reduces the thickness to the position P _4, and ends the thick meat at that position P _4. First, prior to thick-wall machining, the control device 35 is instructed to set desired characteristic curves of the compression speed V and the moving speed W of the heating portion 2 with respect to the longitudinal position of the steel pipe, for example, the characteristic curves 20 and 2 shown in FIG.
Set 1. Further, at the same time, the control device 35 is provided to the control device 35 with an effective amount of heat supplied per unit time by the heating device 9 to the heating part 2 and the steel pipe portion 1 located on the front side of the heating part 2.
Relative movement speed S (= V + W) of the heating unit 2 with respect to b
The characteristic curve of the effective heat supply is set so that the ratio of and becomes constant. Next, the heating device 9 is set at the position P ₁ of the steel pipe 1 to start energization, and the heating of the steel pipe 1 is started. That is, the compression device 4 pushes one end of the steel pipe 1 to push the steel pipe 1 into the heating part 2 to increase the thickness. At the same time, the drive motor 33 moves the heating device 9 in the longitudinal direction of the steel pipe 1 to gradually move the heating unit 2 in the longitudinal direction of the steel pipe 1 to gradually move the thickening position. At the same time, the heating device 9 sprays the cooling medium 10 on the portion immediately after the thickness increase to cool the portion, and stops the portion from further increasing the thickness. In this way
Thick wall processing is continuously performed in the longitudinal direction of the steel pipe 1. During the thick machining, the control device 35 controls the compression device 4 and the drive motor 33 to control the compression speed V and the moving speed W of the heating unit 2.
And the characteristic curves set in advance (the characteristic curves 20 and 2 in FIG.
Change to match 1). Therefore, as shown by the characteristic curve 22, the ratio V / W between the _two gradually increases in the region at the beginning of machining (between positions P ₁ and P ₂ ), and the steady machining region (between positions P ₂ and P _3). ) Is constant, and gradually decreases in the region at the end of processing (between positions P ₃ and P ₄ ). Further, during this processing, the control device 35 sets the ratio of the effective supply heat amount per unit time supplied to the heating unit 2 by the heating device 9 and the moving speed S of the heating unit 2 to be constant.
Since the effective heat supply amount of the heating device 9 is controlled, the heating section 2 is always kept at a substantially constant temperature. In this way, the thickness increase rate gradually increases in the area at the beginning of processing, is kept constant in the steady processing area, and gradually decreases in the area at the end of processing, as shown in FIG. So that the thick portion 1 of the steel pipe 1
In the region a, a smooth gradient with a gradually increasing wall thickness is formed in the region 1a ₁ at the beginning of the thickness increase, and a steady thick region 1a ₀ having a constant thickness is formed behind the region 1a 1 and the thickening end after that is completed. A smooth gradient with a gradually increasing thickness increase rate is formed in the area 1a ₂ of FIG. In this way, in this thick-wall processing, it is possible to control so that the thickness increase rate does not change suddenly during processing. Further, in the initial region of thick-wall processing, as exaggeratedly shown in FIG. 6, since the cooling medium 10 is sprayed on the smooth sloped surface, the cooling medium 10 flows smoothly and the cooling effect becomes stable. Therefore, stable thick wall machining can be performed, and thick wall machining with a high wall thickness increase rate exceeding 100% is also possible. Further, the steel pipe having a locally thick portion obtained by this thick working has a smooth gradient α ₁ , α at both ends of the thick portion.
_{Since 2} (FIG. 5) is formed, there is no portion where stress is concentrated, and a good reinforcing effect can be exhibited. In addition,
In the thick processing, the sloped portions 11a ₁ and 11a ₂ formed at the ends of the thick portion 1a are not limited to linear slopes, and may be curved in a convex shape or a concave shape. Therefore, in the beginning region or the end of thick-wall processing, the thickness increase rate T is shown in FIG.
The configuration may be changed as in 2b. Further, in order to change the thickness increase rate, in addition to the method of changing only the compression speed V, only the moving speed W of the heating unit 2 may be changed, or both of them may be changed together to obtain a desired increase in thickness. It may be configured to obtain a change in meat rate. Although FIG. 4 shows the case where the steel pipe 1 is thick-walled, the same thick-wall machining can be performed on various shaped steels. Further, in the case of thick-walling the steel pipe 1, in FIG. 4, the heating device 9 is arranged on the outer surface side of the steel pipe 1 to heat and cool from the outer surface side. 1 may be performed from the inner surface side, or heating and cooling may be performed separately on the inner and outer surfaces.

FIG. 7 shows an example of a steel pipe column 11 having a locally thick portion obtained by the thick working.
The illustrated steel pipe column 11 is configured such that a square steel pipe is subjected to thick wall processing and is used as a through column of a building. Thick wall portions 11a are formed at a plurality of locations in the longitudinal direction, and each thick wall portion 11a The above-mentioned slope portions 11a ₁ and 11a ₂ having a smooth slope are formed at both ends. Each thick part 1
The center interval between the 1a is determined so as to correspond to the mounting position of the beam on each floor when the steel pipe column 11 is used as a through column of a building. In addition, the width of each thick portion 11a is set to a length required to attach the beam. Since the thick portion 11a is formed in this way,
Can be successfully used as a pillar for multi-storey buildings.

8 and 9 show an enlarged vertical sectional view and an enlarged transverse sectional view of the steel pipe column 11, respectively. The thick portion 11a is formed not only at the intermediate position of the steel pipe column 11 but also at both ends as shown in FIG. 10 (A). The thick portions 11a at both ends are
In the thick-walled machining, a steady machining area where the thickness increase rate is kept constant from the start of processing at the steel pipe start end, and a steady machining area where the thickness increase rate is kept constant until the end of the machining up to the steel pipe end Can be formed. In addition to this, the area 1 where thickening begins near the start and end of the steel pipe
Region ₁ from a ₁ to steady thick region 1 a ₀ to the end of thickening
forming a thick portion 1a spanning a _2, by cutting the intermediate of their constant thick region 1a _0, by cutting a portion of the starting end of the part and end, as well as thick to steel pipe ends Part 11a
Can be formed. Steel pipe column 1 thus obtained
The thick-walled portions 11a at both ends of 1 are used not only for joining the beam 12 made of H-shaped steel or the like, but also for fixing the steel pipe column 11 to the foundation or for joining the ends of the steel pipe column 11 to each other. It is possible. Specifically, the thickness of the thick portion 11a is t ₁ ,
Assuming that the thickness of the non-thick portion 11b is t ₀ , the thickening ratio (= t ₁ / t ₀ ) of the thick portion 11a is 1.2 to 3.6, preferably 1.5 to 2.5. Stipulated in. In addition, the width of each thick portion 11a is set to a length required to attach the beam. That is, when the length of the thick portion 11a is L ₁ and the outer dimension of the non-thick portion 11b is D, the non-thick portion 11b
Ratio of the length of the thick portion 11a to the outer dimension of (= L ₁ /
D) is defined as 1.1 to 4.0. Further, the inclination angles α ₁ and α ₂ of the inclined surfaces of the sloped portions 11a ₁ and 11a ₂ with respect to the steel pipe column axis are 5 to 45 °, and preferably 5 °.
It is set at ~ 30 °.

Except for the thickest portion 11a at the lowermost portion of the steel pipe column 11, the other thick-walled portions 11a have the same thickness as the steel pipe column 11 shown in FIG.
When it is used as a through column of a building as shown in FIG. 5, it is formed at a position corresponding to the mounting position of the beam 12 on each floor.
Assuming that the center distance of the thick portion 11a is L ₂ , this distance L ₂ is equal to the floor height of each floor of the building to be designed and constructed, and is generally 2.0 to 10.0 m from the design and construction examples. It becomes a range. In addition, the thick portion 11 for joining the beam 12
The length L ₁ of a may be generally 600 to 1200 mm. These size ranges, and in consideration of the balance of the structure of the beam spacing and beam dimensions, the length of the distance between centers ÷ thick portion 11a of the thick portion 11a of the tubular columns _{11 (= L 2 / L 1} ) Is
It is selected to be about 3.3 to 8.3. Further, the reverse, the distance between the centers of the length ÷ thick portion 11a of the thick portion _{11a (= L 1 / L 2} ) is selected to be approximately 0.12 to 0.30.

As shown in FIG. 10 (A), the steel pipe pillar 11 having the above-mentioned structure is used as a through pillar extending over a plurality of floors of a building, and the thick-walled portion 11a at the lower end is fixed to the foundation 23 by a fixing tool 24. Beams 12 are provided on the meat portions 11a, respectively.
Are joined. As described above, the steel pipe pillar 11 can be used as a through pillar extending over a plurality of floors, and at that time, since the beam joining work and the fixing work to the foundation 23 can be easily performed, the number of steps can be reduced. There is.
In addition, when making the steel pipe pillar 11 into a through pillar, as shown in FIG.10 (B), the thick part 11a of the upper floor is the thick part 1 of the lower floor.
The thickness increase ratio may be smaller than 1a. By setting the thickness increase ratio in this way, the material of the thick portion 11a is less wasted. That is, since the load acting on the beam joint portion of the pillar 11 becomes smaller toward the upper floor, by setting the thickness increase ratio of the thick portion 11a as described above, an appropriate material usage amount according to the required load can be obtained. Becomes Further, in the example of the figure, since the thick portion 11a swells to both inside and outside, the protrusion amounts e _{1 to} e ₄ from the normal diameter portion of the thick portion 11a are different,
By this, the length of the beam 12 on each floor becomes slightly different, but when the thick portion 11a is bulged only inward as in the example of FIG. 2B, the beam 12 on each floor has the same length. Beams of can be used.

The above-mentioned steel pipe pillar 11 has a thick wall portion 11a formed at a position where the beams 12 arranged at regular intervals are joined, but the formation position of the thick wall portion 11a is not limited to this case.
It can be changed as appropriate. 11 and 12 show the thick portion 11a.
It shows each example which uses the steel pipe pillar 11 which changed the formation position of. In the steel pipe column 11 of FIG. 11, a thick portion 11aa for fixing the brace 25 that reinforces the beam 12 is formed in the middle of the thick portion 11a for joining the beams 12. The thick portion 11aa has the same structure as the thick portion 11a, and the brace 25 can be easily fixed. The steel pipe column 11 of FIG. 12 is composed of two parallel beam members 12.
This is for use in a building using a lattice type beam 12A composed of A ₁ , and a thick portion 11a is formed at a position corresponding to each beam 12A ₁ . Also in this steel pipe column 11, the beam 12A ₁ can be easily joined.

The column-beam joint structure shown in FIG.
1. The sloped portions 11a ₁ and 1 at both ends of the thick portion 11a in FIG.
The gradient of 1a ₂ is steep. Other configurations are the same as those in FIG.

FIG. 14 shows a second pillar / beam joint structure of the present invention.
An example of is shown. FIG. 1A shows the thick wall portion 11 of the steel pipe column 11.
It shows an example in which a is provided at two upper and lower portions at one beam joint. The upper and lower flanges of the beam made of H-section steel or the like are respectively positioned at the heights of the thick-walled portions 11a and 11a, and bolted by a split tee or the like. In such a configuration, the upper and lower flange-corresponding portions of the beam on which the transmitted load from the beam largely acts become the thick-walled portion 11a, so that the total length of the thick-walled portion 11a can be shortened to obtain sufficient proof stress. Yes, the amount of steel used can be reduced. Other effects are the same as those in the above-mentioned embodiment. In the example of FIG. 14B, the inside of the steel pipe column 11 is filled with concrete 26. When the concrete 26 is filled in this way, the compressive strength in the axial direction of the steel pipe column 11 is improved, and also the compressive force in the lateral direction acting on the steel pipe column 11 from the beam is also improved. Reinforcing bars (not shown) may be embedded in the concrete 26, or the concrete 26 may be filled only in the thick portion 11a.

Although the split tee 13 is used in each of the above-described embodiments, the end plate 17 welded to the beam 12 as in the third embodiment shown in FIG.
May be joined to the thick portion 11a of the beam with bolts 18, or the end of the beam 12 may be joined to the thick portion 11a via another appropriate joining member.
It may be configured to be bolted to. End plate 1
As shown in FIG. 15B, 7 may have a length that extends vertically in the beam formation of the beam 12. In each example of FIG. 14, the beam may be of an end plate type as in each example of FIG. When using the end plate type, the beam 1
2 is a beam portion 12C ₂ at the end as shown in FIG.
It is preferable to divide the beam into a beam main body portion 12C ₁ and to join the both with the attachment plate 29 by a beam joint such as a bolt. Joining of the attachment plate 29 is performed in the same manner as in the example of FIG. 21 described later. By dividing the beam 12 in this way, the beam 12
Even when there is a slight error in the dimension between the adjacent columns 11 and the dimension of the beam 12 at the time of building, the error can be absorbed in the beam joint portion, and the joining work becomes easy. Further, in each of the above-described embodiments, the bolt 1 is directly inserted into the screw hole 16 provided in the thick portion 11a.
Although the screws 4, 15 and 18 are screwed, if a hand or the like can reach the back of the thick portion 11a, a simple bolt insertion hole may be provided instead of the screw hole 16 and bolts may be joined using a nut. Further, a nut may be temporarily fixed to the back of the thick portion 11a with an adhesive, welding, or the like, and then bolted to the nut. Instead of the screw hole 16, a bolt insertion hole 19 may be provided as in the fourth embodiment shown in FIG. 16 and the one side bolt 36 may be used. As the one-side bolt 36, various ones can be used, but a pin, a head forming member which is provided at the tip of the pin and is plastically deformable in a diameter-expanded state, and an externally-movable external member for the pin. A sleeve for pressing force that is fitted and pressurizes the head forming member in the axial direction to plastically deform it; a shearing member that engages with the rear end of the sleeve and shears with a predetermined axial force; A one-sided bolt having a configuration including a nut provided on the rear portion for sandwiching the material to be fastened between the head forming member in the expanded diameter state is preferable. Examples of one-side bolts of this type are shown in FIGS.

FIG. 17 shows an example of the one-side bolt 36 used in the construction structure. This one side bolt 36
Is a pin 37 and a pin head 37a on the outer periphery of the pin 37.
It is assumed to have a valve sleeve 38, a grip sleeve 39, a shear washer 40, a receiving washer 41, and a nut 42 which are arranged side by side from the side. The pin 37 has a fracture groove 37d in the middle of the threaded portion 37b following the round shaft portion 37e, and has a pin head portion 37a having a diameter slightly larger than the pin diameter at the tip.
Have. Further, a short pin tail 37c is provided following the screw portion 37b. The pin tail 37c has an outer diameter surface formed as an uneven surface for preventing slippage, and is, for example, an uneven surface formed by forming a large number of rows of teeth arranged in the axial direction in the circumferential direction. The valve sleeve 38 is made of a material softer than the grip sleeve 39, and is plastically deformable outward in the form of a brim by the load of the axial force. For example, the grip sleeve 39
Is a hard steel alloy, and the valve sleeve 38 is a soft steel alloy. The receiving washer 41 is formed to have an inner diameter that allows the grip sleeve 39 to enter, and an annular groove 41a into which the outer peripheral portion of the shear washer 40 fits is provided on the side surface on the pin head side. The share washer 40 has an inner peripheral portion that engages with the end surface of the grip sleeve 39 and shears with a predetermined axial force. Further, in this example, the tip end side portion 37e ₁ of the round shaft portion 37e of the pin 37 is made slightly larger than the base end side portion 37e ₂ through the step portion 37f, and the inner diameter of the grip sleeve 39 is set to the tip end side portion 37e. _The diameter is smaller than ₁ . The round shaft portion 37e may have the same diameter over the entire length. The fastening operation of the one side bolt 36 can be performed by using a rotary electric fastening tool (not shown). That is, while the pin tail 37c is gripped by the tightening tool, the nut 42 is tightened by the box-shaped nut engaging portion of the tool. As a result, a compressive force acts between the pin head portion 37 a and the shear washer 40, so that the grip sleeve 39 and the valve sleeve 38.
Is clamped, and first, the valve sleeve 38 at the tip begins to plastically deform outward in a brim shape. That is, barbing occurs. When the round shaft portion 37e of the pin 37 is stepped, the above-mentioned barbing occurs until the step portion 37f is engaged with the grip sleeve 39. When the nut 42 is further tightened, the shear washer 40 is sheared and the grip sleeve 39 enters the shear washer 40. As a result, when the flange-shaped deformed portion 38a of the valve sleeve 38 engages with the inner wall surface of the steel pipe column 11, the nut 42 and the flange-shaped deformed portion 38a.
Between the and, a tightening axial force is introduced into the pipe wall of the steel pipe column 11 and the split tee 13. When the nut 42 is further tightened and rotated, the pin tail 37c breaks in the break groove 37d while a predetermined axial force is introduced (FIG. 17 (B)).
In the figure, 53 is a bolt insertion hole provided in the standing piece 13b of the split tee 13. When this one side bolt 36 is used, strong joining can be performed as follows. That is, due to the shearing of the shear washer 40, the tightening force between the nut 42 and the flange-shaped deformed portion 38a of the valve sleeve 38 directly becomes the tightening force that sandwiches the steel pipe column 11 and the split tee 13, and a strong tightening force is obtained. can get. Further, in the case of the one side bolt 36, the following respective advantages can be obtained. First, the valve sleeve 38 that serves as the bolt head
Since the brim-shaped deformed portion 38a of the
The contact pressure with and becomes small, and the bolt hole diameter has a relatively acceptable width. For example, the problem that the edge of the bolt insertion hole 19 is deformed by the contact pressure and the bolt head is fitted is unlikely to occur.
Along with that, the load bearing capacity of the bolt head formed of the collar-shaped deformed portion 38a is improved, the tightening force of the one-side bolt 36 is improved, and the efficiency is improved. Moreover, since the nut 42 is rotated and tightened, it can be tightened twice or retightened. In addition, an electric device is used for tightening, and it is easy to handle at the site. With the one-side bolt 36A that is tightened by a pulling operation described later with reference to FIG. 19, in order to obtain a sufficient axial force necessary for rigidly joining a building, for example, about 2
Although 0 kilograms of hydraulic tightening tool is required, the rotary electric equipment described above requires only 10 kilograms of light weight. Moreover, heavy hydraulic piping is not required, and only an electric cord is needed, which dramatically improves workability. In addition, the hydraulic unit does not need to be prepared, and tightening on high floors can be performed easily. Also, this one side bolt 36
, The pin tail 37c to be discarded after tightening is short, and the waste of material is small. Further, the number of parts constituting the bolt is small, which results in cost reduction. In the one side bolt 36 of FIG. 17, instead of the shear washer 40 and the receiving washer 41, the shear washer 40A with a collar of FIG. 18 having a shape in which the shear washer 40 and the receiving washer 41 are integrated with each other is used. Good. That is, the collar-equipped shear washer 40A is formed with an inner diameter into which the grip sleeve 39 can enter, and a collar portion 40Aa that engages an end surface of the grip sleeve 39 with an inner diameter surface and shears with a predetermined axial force.
Shall have. One side bolt 36 of this configuration
Also in this case, tightening can be performed as in the example of FIG. FIG. 19 shows an example of another one side bolt 36A. The one-side bolt 36A has a pin 43 and a first sleeve 44, a second sleeve 45, a grip adjuster 46, a washer 47, and a collar 48 which are arranged on the outer periphery of the pin 43 in order from the pin head 43a side. I shall. The pin 43 has a thread groove-shaped uneven surface portion 4 in the middle.
3c and a fractured groove 43b, and a pin head portion 43a having a diameter slightly larger than the pin diameter is provided at the tip on the side of the uneven peripheral surface portion 43c. The other end of the pin 43 has a pin tail 43 on the uneven peripheral surface which is gripped by a chuck 49b of a tightening tool 49 described later.
It is as d. The uneven peripheral surface is composed of a large number of annular grooves arranged side by side. The outer diameter surface of one end of the second sleeve 45 is the first
It is formed into a tapered taper surface that enters the sleeve 44 and spreads the first sleeve 44. The grip adjuster 46 is formed by connecting a large-diameter cylindrical portion 46a and a small-diameter cylindrical portion 46b having a diameter that can be fitted into each other inside and outside with a step portion 46c, and the step portion 46c is sheared by a predetermined axial load. To do. The collar 48 is formed in the shape of a short cylinder and has a pin tail 4
It is assumed that there is a taper cylinder portion 48b that is open on the 3d side, and that the inner diameter surface is plastically deformed into the concave and convex peripheral surface portion 43c of the pin 43 by the reduction of the outer diameter. The fastening work of the one side bolt 36A is performed by the fastening tool 4 as shown in FIG.
9 is used. Fastening tool 49 is one side bolt 3
The 6A collar 48 also has a cylindrical aperture guide portion 49a that engages with the end surface, and a chuck 49b that holds the pin tail 43d.
And has a built-in hydraulic actuator (not shown) that pulls the chuck 49b in the axial direction with respect to the diaphragm guide portion 49a. By pulling the pin tail 43d with the chuck 49b while the diaphragm guide portion 49a is in contact with the collar 48, the washer 47,
A compressive force that sandwiches the grip adjuster 46, the second sleeve 45, and the first sleeve 44 acts. With this compressive force, the tapered surface portion of the second sleeve 45 first enters into the first sleeve 44 and spreads the first sleeve 44.
When the deformation of the first sleeve 44 is completed, the grip adjuster 46 is sheared by the step portion 46c and the small diameter tubular portion 46b thereof enters the large diameter tubular portion 46a. As a result, when the first sleeve 44 is engaged with the steel pipe column 11, the drawing guide portion 49a of the tool 49 starts to draw the collar 48, and the axial force to the pipe wall of the non-tightened steel pipe column 11 and the split tee 13. Will be introduced. By further pulling the chuck 49b, the stop of the collar 48 is completed, the inner diameter surface of the collar 48 is fixed in a state of biting into the uneven peripheral surface portion 43c of the pin 43, and an axial force is introduced by a predetermined force, so that the pin tail 43
d is fractured from the fracture groove 43b (FIG. 19 (B)). In this way, the first sleeve 44 and the collar 48 in the expanded state are
The steel pipe column 11 and the split tee 13 are sandwiched between the and. Even if the one-side bolt 36A is used to fasten as described above, it is possible to firmly join.
That is, the one-side bolt 36 </ b> A is attached to the first sleeve 44 by the grip adjuster 46 shearing.
The tightening force between the collar 48 and the collar 48 is the same as the steel pipe column 11
Since the tightening force sandwiches the split tee 13 and the split tee 13, a strong tightening force can be obtained.

FIG. 20 shows a fifth embodiment of the column / beam joint structure of the present invention. In this embodiment, the round steel pipe 11A obtained by performing the thick wall processing is used as a through column. The thick-walled portion 11A is formed in a part of the height direction of the round steel pipe column 11A.
a is formed. The beam 12B is assumed to have an end plate 17A curved to a curvature that matches the outer diameter surface of the thick portion 11Aa, and the beam 12B is joined to the round steel pipe column 11A with a bolt 50 inserted into a bolt insertion hole of the end plate 17A. I am doing it. The bolt 50 may be a high-strength bolt that is screwed into a screw hole formed in the thick portion 11Aa or a one-side bolt. The thick-walled portion 11Aa may be one that swells to the inner and outer surfaces, one that swells to one of the inner and outer surfaces, as in the case of the rectangular steel pipe column 11, and as in the example of FIG. 14 (A). It may be formed separately at a plurality of locations. Also in this case, concrete may be filled in the steel pipe pillar 11A. Also, the end plate 1
7A may project more vertically than the beam forming, and the projecting portion may be bolted to the thick portion 11Aa.

FIG. 21 shows a sixth embodiment of the column-beam joint structure of the present invention. That is, this embodiment uses a round steel pipe column 11A having a thick wall portion 11Aa, which is integrally thickened over the entire circumference of the pipe wall, obtained by the thick wall machining of FIGS. The steel beam 1 is attached to the thick portion 11Aa of the pillar 11A.
The bracket-shaped portion 12C _{2 serving} as the 2C joint is welded. The steel pipe pillar 11A serves as a through pillar extending over a plurality of floors, and a thick wall portion 11Aa for welding each beam 12C of each floor is formed at a corresponding height position of the beam 12C. Further, the steel frame beams 12C may be welded to the same thick wall portion 11Aa of the steel pipe column 11A by a plurality of steel beams extending in each direction. The thick-walled portion 11Aa has an axial length that extends slightly vertically above and below the beam formation of the beam 12C, and the tube wall swells in and out. The thick portion 11Aa is shown in FIG.
22A may bulge only on the outer surface side of the steel pipe column 11A, or may bulge only on the inner surface side as shown in FIG. 22B. The steel beam 12C is composed of a bracket-shaped portion 12C ₂ and a beam body 12C _1.
H-section steels having the same cross section are used for C ₁ and 12C ₂ .
Welding the bracket-shaped portion 12C _{2 to} the steel pipe column 11A
Upper and lower flanges 12C ₂ a, the end of the 12C ₂ b, formed in advance on the arcuate notch 27 along the outer surface of the thick portion 11Aa, the upper and lower flanges 12C along its notch 27
₂ a, 12C ₂ b portion and the thick portion 1 and a web 12C ₂ c
It is performed by welding to 1 Aa. Bracket-shaped part 12C
₂ of upper and lower flanges 12C ₂ a, 12C in the ₂ b and the web 12C ₂ c, may be provided a plurality of joining holes 28, the beam body 12C butted to the bracket-like portion 12C _{2 1}
The flanges 12C ₂ a, 12C ₂ b and the web 1
With 2C ₂ c the overlapped accompanied plate 29, joined with a pin-shaped connectors, such as bolts or rivets.

FIG. 23 is a process drawing showing the joining method of the above-mentioned pillar-beam joining structure. That is, the round steel pipe 1A shown in FIG. 23 (A) is thick-walled by induction heating and compression to form a thick-walled portion 11A in a part in the longitudinal direction as shown in FIG. 23 (B).
It is processed into a steel pipe column 11A having a. At the factory, the beam 1 is attached to the thick portion 11Aa which is the beam joint of the steel pipe column 11A.
The bracket-shaped portion 12C ₂ of 2C is welded as shown in FIG. The steel pipe column 11A with this bracket is shown in FIG.
As shown in FIG. 3 (D), the beam main body 12C _{1 is} attached to the bracket-shaped portion 12C ₂ of the steel pipe pillar 11A that has been built at the construction site.
23 is joined via the attachment plate 29 with a pin-like joining tool 53 such as a bolt or a rivet as shown in FIG.

Also in this structure, since the portion of the steel pipe column 11A joined to the steel beam 12C is made of the thick portion 11Aa, the steel pipe column 11A and the steel beam 12C are firmly joined without providing a reinforcing member. be able to. Therefore, the step of attaching the reinforcing member is unnecessary, and the joining work is simplified. Moreover, the steel pipe pillar 11A can be a single through pillar without a seam over a plurality of floors, and since it is made of steel pipe, the cost can be reduced as compared with the case of casting. In addition,
The bracket-shaped portion 12C ₂ of the beam 12C may be of a type provided with an end plate 17A as shown in FIG.

FIG. 25 shows a seventh embodiment of the column-beam joint structure of the present invention. In this embodiment, the thick portion 11Aa of the round steel pipe column 11A in FIG.
2 at the height corresponding to the upper and lower flanges of 2C
It is divided into parts. The web end of the beam 12C, and below each thick portion 11Aa, the normal-diameter portion of the protruding pieces 12C ₂ c abutting and the notch formed between 11Aa, web 12C
Entire upper and lower flanges 12C ₂ a of the end surface of ₂ c, 12C ₂
The end portion formed by the notch portion 27 of b is welded to the steel pipe column 11A. The thick-walled portion 11Aa is, as in the thick-walled portion in FIG. 21, bulged on the inner and outer surfaces of the pipe wall.
As in the case of No. 2, it may be expanded only on the outer surface side or may be expanded only on the inner surface side. FIG. 26 shows another example of the round steel pipe column 11A used in the above embodiment. In this example, concrete 26 is filled into the entire inside of the steel pipe column 11A in the example of FIG. When the concrete 26 is filled in this way, the axial compressive strength of the steel pipe column 11A is improved, and the compressive force is also improved against a lateral compressive load acting on the steel pipe column 11A from the beam 12C.
The reinforcing bar 51 may be embedded in the concrete 26,
Further, the concrete 26 may be filled only within the corresponding height range of the thick portion 11Aa.

FIG. 27 shows an eighth embodiment of the column-beam joint structure of the present invention. In this embodiment, the square steel pipe 11 that has been subjected to the thick wall processing shown in FIGS. 4 to 6 is used as a steel pipe column, and the wall thickness of the pipe wall is integrally increased over the entire circumference like the embodiment of FIG. The formed thick portion 11a is provided. This thick portion 11a
Then, the end face of the bracket-shaped portion 12C ₂ of the steel beam 12C is welded. In this embodiment, the end surface of the bracket-shaped portion 12C ₂ of the steel beam 12C is left flat without forming a notch. The thick portion 11a swells on the inner and outer surfaces of the tube wall, but the thick portion 11a may swell only on the outer surface side or only on the inner surface side. Further, the thick-walled portion 11a corresponding to the beam on each floor may be provided by using the steel pipe pillar 11 as a through-column, and the thick-walled portion 11a is separately provided in the portions corresponding to the upper and lower flanges of the beam 12C as in the case of FIG. May be. Also in the case of this configuration, the round steel pipe column 1
Similar to the case of 1A, various advantages such as firmly joining the beam 12C to the steel pipe column 11 can be obtained without providing a reinforcing member.

In each of the embodiments shown in FIGS. 21 to 27, the bracket-shaped portion 12C ₂ of the steel beam 12C is connected to the steel pipe columns 11, 1.
Although it is welded to 1A, the steel beam 12C may be welded to the thick portions 11a and 11Aa of the steel pipe columns 11 and 11A as a single member. Further, various shaped steels other than the H-shaped steel may be used for the steel frame beam. Moreover, in each of the examples of FIGS. 21 to 27, the thick-walled round steel pipe column 11A and the square steel pipe column 1 are used.
Although the case where 1 is used is shown, it is not limited to this, and H-section steel,
It may be a column of steel material such as I-shaped steel or channel steel, or may be a metal strip material other than steel material. FIG. 28 (A) shows a pillar 11B made of an H-shaped rope in which thick portions 11Ba are formed on the inner surfaces of both flanges and both surfaces of the web. The beam 12 is bolted to the thick portion 11Ba by the angle member 52. A split tee may be used instead of the angle member 52. In the case of the column 11B made of H-shaped steel, the thick portion 11Ba may be formed as described above, or the thick portion may be formed only in the flange portion, or the thick portion may be provided only in the web portion,
Further, both the lung and the web may be inflated on both sides or only on one side. FIG. 28
(B) is a thick section 11 in a column 11C made of channel steel.
Ca is formed only on the inner surface side. The beam 12 is to be bolted to the thick portion 11Ca with the angle member 52.
A split tee may be used instead of the angle member 52. Also in this case, the thick portion 11Ca may be formed only on the inner surface side, or may be formed only on the outer surface or on both surfaces. Further, the thick portion may be formed only on the flange portion, or the thick portion may be formed only on the web portion.

FIG. 29 shows the beam 12 in the embodiment of FIG.
A thick-walled portion 12d is provided at the end of the, and the thick-walled portion 12d is bolted to the split tee 13. The thick-walled portion 12d is formed by the above-described heat compression similarly to the case of the pillar and is provided over the upper and lower flanges 12a, 12a and the web, but may be provided only on the upper and lower flanges 12a, 12b. By providing the beam 12 with the thick portion 12d in this manner, the cross-section loss due to the formation of the bolt hole for joining the beam 12 to the split tee 13 is compensated for, and the beam 12 having a relatively small cross-section is used to make the beam 12 rigid. Bonding can be done.

[0032]

According to the column-beam joint structure of the present invention, a thick portion by heating and compression is provided in a part of the longitudinal direction of the steel pipe column, and the end portion of the beam made of shaped steel is provided in the thick portion of the steel pipe column. Since the bolts are joined to each other, the steel tube column and the shaped steel beam can be firmly bolted to each other without providing a reinforcing member. Therefore, the number of bolts is small and the number of bolt tightening steps can be reduced.
In particular, since the thick wall portion is a portion integrally formed with the steel pipe by heat compression, the quality is stable, the reliability is high, and the thick wall portion can be formed easily and inexpensively as compared with centrifugal casting or the like. When joining the end of the beam and the thick part of the steel pipe column through a pair of split tees that are bolted to the thick part and the upper and lower flanges of the beam, weld the end plate to the beam. It is not necessary to perform welding, all can be joined without welding, and in combination with the provision of the thick portion, a simpler and stronger bolt joining structure can be obtained. Further, it is easy to absorb the error between the dimension between adjacent columns and the length dimension of the beam. In addition, when the end portion of the beam and the thick wall portion of the steel pipe column are joined via the end plate of the beam, welding in a factory or the like is necessary, but a simple joint structure can be obtained. If one-sided bolts are used for the bolts that are inserted into the steel pipe pillar, it is not necessary to perform back nut welding or screw processing inside the steel pipe pillar with a closed cross section.
Joining work becomes easy. Therefore, in combination with the thick portion formed by heating and compression on the column, a very simple joining structure is obtained.

In the column-beam joint structure of the present invention, a thick wall portion by heating and compression is provided in a part of the longitudinal direction of the steel pipe pillar, and the end portion of the beam made of shaped steel is welded to the thick wall portion of the steel pipe pillar. Also in this case, the beam can be firmly joined to the steel pipe column without providing the reinforcing member, the joint is highly reliable, and the structure can be simplified, and the joining work can be simplified and speeded up. Moreover, the beam can be firmly joined to the middle height position of the steel pipe column, and the beams of multiple floors are welded to the thick-walled parts formed in each part of the seamless through-column, respectively, to simplify the structure of the building. You can also
If the thickening on the upper floor is made smaller than that on the lower floor when using through columns, the steel material fee will be according to the required load, and the material of the thick portion will be There is little waste. If the portion of the beam to be welded to the steel pipe column is a bracket made of shaped steel that will be part of the beam, the bracket is welded at the factory and the main body of the beam is simply bolted to the bracket on site. Can be joined in any way. Also,
If the thick-walled portion of the steel pipe column is located at two positions, each at the height corresponding to the upper and lower flanges of the beam, and provided in two places, reduce the thick-walled portion while ensuring the necessary joining strength. Costs can be reduced by reducing the materials used for steel pipe columns.

In the column-beam joining method of the present invention, a portion of the steel pipe column member in the longitudinal direction is induction-heated, and this heating portion is compressed in the column member longitudinal direction to locally thicken the column member. Part, the step of erection of the pillar material having the thick wall portion, and the step of bolting the end of the beam made of shaped steel to the thick wall portion of the built pillar material. Since it is a method that includes and, it is possible to easily and inexpensively form a locally thick wall portion on a steel pipe column material by induction heating and compression, regardless of welding of joint boxes, welding of reinforcing plates, centrifugal casting, etc. In addition, the steel pipe column and the shaped steel beam can be firmly and easily bolted to each other.

In the column-beam joining method of the present invention, a portion of the steel pipe column member in the longitudinal direction is induction-heated, and this heated portion is compressed in the column member longitudinal direction to locally thicken the column member. Part, the process of welding the end of the shaped steel bracket that will be part of the beam to the thick part of this pillar, and the process of building the welded pillar of this bracket, Also in the case of a method including a step of joining the ends of the beam member made of shaped steel to the bracket of the built-in pillar material, as in the case of the joining method, the local thickness of the pillar material made of steel pipe is The meat portion can be formed easily and inexpensively and with high reliability, and the steel tube column and the shaped steel beam can be firmly and easily bolted.

[Brief description of drawings]

FIG. 1 is a perspective view and a sectional view of an embodiment of a column / beam joint structure of the present invention.

FIG. 2 is a cross-sectional view showing each modified example of a steel pipe column used for the same column / beam joined body.

FIG. 3 is a process drawing showing the method of joining the pillar / beam joints.

FIG. 4 is a cross-sectional view of a thick-wall processing device used in the same process.

FIG. 5 is an explanatory view showing thick-wall machining by the same device.

FIG. 6 is an enlarged view of a part of the steel pipe to which the thick wall processing is applied.

FIG. 7 is a partially cutaway plan view of a thick-walled steel pipe column.

FIG. 8 is a longitudinal sectional view of the steel pipe column.

FIG. 9 is a sectional view of the steel pipe column.

FIG. 10 (A) is a front view showing a column-beam joint structure in which the steel pipe column is a through column, and FIG. 10 (B) is a front view of a modified example thereof.

FIG. 11 is a front view showing another example of the column / beam joint structure.

FIG. 12 is a front view showing still another example of the column / beam joint structure.

13A and 13B are a perspective view and a cross-sectional view showing another example of a pillar / beam assembly.

FIG. 14 is a cross-sectional view showing another modification of the steel pipe column.

15A is a cross-sectional view showing still another example of the same column / beam joint structure, and FIG. 15B is a cross-sectional view of a modified example thereof.

FIG. 16 is a cross-sectional view showing still another example of the column / beam joint structure.

FIG. 17 is an explanatory diagram showing a fastening operation of an example of a one-side bolt used in the column-beam joint structure.

FIG. 18 is a cross-sectional view showing another example of the one-side bolt.

FIG. 19 is an explanatory view showing a fastening operation of still another example of the one-side bolt.

FIG. 20 is a perspective view showing still another example of the column / beam joint structure.

FIG. 21 is a perspective view and a cross-sectional view showing another embodiment of the column / beam joint structure.

FIG. 22 is a cross-sectional view showing each modified example of the steel pipe column used in the embodiment.

FIG. 23 is a process drawing showing the method of joining the same pillar-beam joined body.

FIG. 24 is a partially cutaway perspective view showing another example of the column / beam joint structure.

FIG. 25 is a perspective view and a cross-sectional view showing still another example of the column / beam joint structure.

FIG. 26 is a cross-sectional view showing another example of the steel pipe column used in the embodiment.

FIG. 27 is a perspective view and a cross-sectional view showing still another example of the column / beam joint structure.

FIG. 28 is a perspective view showing still another example of the column-beam joint structure.

FIG. 29 is a perspective view showing still another example of the column / beam joint structure.

[Explanation of symbols]

11, 11A ... Steel tube column, 11B, 11C ... Steel column, 11
a, 11Aa, 11Ba, 11Ca ... Thick part, 12, 1
2A, 12B, 12C ... Shaped steel beam, 12C ₁ ... Beam main body part, 12C ₂ ... Bracket-like part, 13 ... Split tee, 17, 17A ... End plate, 36, 36A ...
One side bolt

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasuo Watanabe 2-17-8 Tonomachi, Kawasaki-ku, Kanagawa Prefecture

Claims (12)

[Claims] 1. A column-beam joint structure in which a thick portion by heating and compression is provided in a part of the longitudinal direction of a steel pipe column, and the end portion of a beam made of shaped steel is bolted to the thick portion of the steel pipe column. 2. The joining of the end portion of the beam and the thick wall portion of the steel pipe column,
The column-beam joint structure according to claim 1, wherein the column-beam joint structure is formed through a pair of split tees that are respectively bolt-joined to the thick portion and the upper and lower flanges of the beam. 3. The connection between the end portion of the beam and the thick wall portion of the steel pipe column,
The pillar according to claim 1, which is performed through an end plate of the beam.
Beam joint structure. 4. A one-sided bolt is used as a bolt to be inserted into the steel pipe column, and the one-sided bolt is used.
The column-beam connection structure described. 5. A column-beam joint structure in which a thick portion by heating and compression is provided in a part of the longitudinal direction of a steel pipe column, and the end of a beam made of shaped steel is welded to the thick portion of the steel pipe column. 6. The column-beam joint structure according to claim 5, wherein the portion of the beam to be joined to the steel pipe column is a bracket made of shaped steel that is a part of the beam. 7. The column-beam joint structure according to claim 1 or 5, wherein the thick-walled portion of the steel pipe column is provided at two positions separated from each other at a height corresponding to the upper and lower flanges of the beam. 8. The column-beam joint according to claim 1, wherein a column having a thick portion formed by heat compression is provided on a shaped steel other than a steel pipe instead of the steel pipe column. Construction. 9. The steel pipe pillar is a through pillar extending over a plurality of floors of a building, and the thick wall portion is provided at a position corresponding to each floor,
The thickening ratio of the thick portion to the non-thick portion is set so that the thick portion on the upper floor is smaller than the thick portion on the lower floor.
Alternatively, the column-beam joint structure according to claim 5. 10. A process of inductively heating a part of a steel pipe pillar in the longitudinal direction and compressing the heated portion in the longitudinal direction of the pillar to form a locally thick portion in the pillar, and A pillar-beam joining method including a step of building a pillar material having a thick-walled part formed therein, and a step of bolting an end of a beam material made of shaped steel to the thick-walled part of the built-in pillar material . 11. A process of inductively heating a part of a steel pipe pillar in the longitudinal direction and compressing the heated portion in the longitudinal direction of the pillar to form a locally thick portion in the pillar, The process of welding the end of the bracket made of shaped steel that becomes a part of the beam to the thick part of the pillar, the process of building the welded pillar of this bracket, and the step of A column-beam joining method including a step of joining ends of beam members made of shaped steel to a bracket. 12. The thick-walled portion of the steel pipe column is provided at two positions separately at positions corresponding to the upper and lower flanges of the beam, respectively.
Alternatively, the pillar-beam joining method according to claim 11.