JP2003343008A - High-strength bolted joints between concrete-filled steel tubular columns and H-section beams and high-strength anchor bolts - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a square or circular concrete-filled steel tubular column (CFT column) and a H-shaped beam using a joint hardware and a high-strength bolt which can reduce a cost burden and improve a joint performance. Provided is a joining structure and a head-tightened high-strength bolt for realizing the joining structure. SOLUTION: A nut to which an anchor plate having a female thread is lightly joined is fixed in advance to the inside of a steel pipe column, and a bolt hole is formed at the tip end side from the outer surface of a metal fitting abutting on the outer surface of the steel tube column. Insert a head-tightening high-strength bolt capable of forming an anchor part into the nut, screw and fasten the male screw with a nut fixed to the inner side of the steel pipe column to form an anchor part on the tip side,
It is buried in concrete solidified by filling the inside of the steel pipe column.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a concrete-filled concrete-filled steel pipe column (CFT column) that constitutes a building structure, in which an H-shaped cross-section beam is joined by a high-strength bolt through a joining hardware. The present invention relates to a joint structure of a steel pipe column and an H-shaped cross-section beam, and a head-fastening high-strength bolt used in this joint structure.

[0002]

2. Description of the Related Art Conventionally, for example, in a column-beam joint type for an S-shaped rectangular steel pipe column and an H-shaped steel beam, Japanese Patent Laid-Open No. 11-
As disclosed in Japanese Patent No. 269986, as shown in FIG. 16, a vertical plate (flange) 2f of a pair of upper and lower T-shaped metal fittings 2a and 2b is attached to each side portion of the rectangular steel tube column 1 by a high strength bolt. 3, and the upper and lower T-shaped metal fittings 2a,
The end of the H-shaped steel beam 4 is positioned between the horizontal plates (web) 2u of 2b, and the upper surface of the upper flange 4a of the H-shaped steel beam 4 is attached to the lower surface side of the horizontal plate 2u of the upper T-shaped joint metal 2a. , The upper surface of the lower flange 4b of the H-shaped steel beam 4 is brought into contact with the upper surface side of the horizontal plate 2u of the lower T-shaped joint metal 2b, and is joined with the high-strength bolt 5.
A high-strength bolted structure of a square steel tube column and an H-shaped steel beam, which reduces the welding load, is generally known.

In such a high-strength bolt joint structure, the joint performance is exhibited by the out-of-plane bending resistance of the square steel tube column, so that the rigidity of the joint is relatively low. Therefore, in the high-strength bolt joint structure as described above, as shown in FIGS. 17 (a) and 17 (b), the inside of the square steel pipe column 1 is filled with concrete 6 to increase the rigidity of the joint portion of the square steel pipe column. It is also being raised. However, if you simply fill the inside of the square steel tubular column with concrete,
Although the resistance of the filled concrete to the compressive force from the H-shaped steel beam flange can be expected, only the improvement of the performance can be expected to the tensile force by suppressing the deformation of the side surface of the square steel tube column. The improvement in joint performance is small.

On the other hand, in Japanese Unexamined Patent Publication No. 6-257224, as shown in FIGS. 18 (a) and 18 (b), a column-beam joint for a CFT rectangular steel tube column 1 and an H-shaped steel beam 4 is intended. In the form, there is disclosed a column-beam joint in which a vertical rib 7 is provided inside a rectangular steel tube column 1 without installing a diaphragm. In this column-beam joint, the presence of the vertical ribs causes the resistance of the filled concrete to the tensile force from the beam flange, so that improvement in the joint performance can be expected compared to the case where the vertical ribs are not provided. However, it is necessary to weld the vertical ribs 7 to the inside of the rectangular steel pipe column, and this welding is performed at the manufacturing stage of the rectangular steel pipe, cutting the vicinity of the joint of the rectangular steel pipe column, and the like, and the processing load is large, resulting in high cost. There is a problem.

Further, in Japanese Unexamined Patent Publication No. 6-248698, as shown in FIG. 19, a rectangular steel tube column 1 and H made of CFT is used.
In the column-beam joint type for the type steel beam 4, the stud 9 is provided inside the rectangular steel tube column 1 with the diaphragm 8 installed, and the column-beam joint with the H type steel beam 4 welded to the diaphragm 8 is formed. It is disclosed. In these column-beam joints, the presence of the vertical ribs 7 and the studs 9 causes the resistance of the filled concrete 6 to the tensile force from the flange of the H-shaped steel beam 4, so that the vertical ribs or studs are not provided. Improved joint performance can be expected compared to steel pipe columns. However, it is necessary to weld the vertical ribs and studs inside the square steel pipe, and this welding must be performed at the manufacturing stage of the square steel pipe or by cutting the vicinity of the joint of the square steel pipe column. There is a problem in that the burden of processing and welding for manufacturing is heavy and the cost becomes high.

For example, in a joint structure of a square steel tube column and an H-section steel beam using a T-shaped joint metal and a high-strength bolt as shown in FIG. 17, the inside of the square steel tube column is filled with concrete and the rigidity of the joint portion is increased. In order to improve the joint strength, it is conceivable to weld the vertical ribs or studs as shown in FIGS. 18 and 19 inside the rectangular steel tubular column 1 that is filled with the concrete 6 to enhance the joint performance. However, in the joint structure of a rectangular steel pipe column and a H-shaped steel beam that is filled with concrete using this T-shaped joint metal and high-strength bolt, when welding vertical ribs or studs inside the rectangular steel pipe column, processing, In addition to the large burden of welding and the high cost, there is a problem in that a high-strength bolt is inserted into the bolt hole from the inside of the square steel tube column and the nut tightening on the outside is hindered.

[0007]

SUMMARY OF THE INVENTION According to the present invention, a prismatic or circular concrete-filled steel tubular column using a metal joint and a high-strength bolt capable of reducing the cost burden and improving the joint performance (rigidity, yield strength) ( It is intended to provide a joint structure of a CFT column) and an H-shaped cross-section beam, and a head tightening high-strength anchor bolt that realizes this joint structure.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention has the following gist (1) to (14). (1). In a high-strength bolted structure of a square or circular concrete-filled steel tubular column and an H-shaped cross-section beam using a joint metal, a nut to which an anchor plate having a female screw is lightly joined is previously fixed to the inside of the steel tubular column. , From the outer surface of the metal fitting that abuts the outer surface of this steel tube column, insert a high-strength bolt that tightens the head into the bolt hole, and screw its male screw to the nut fixed to the inner side of the steel tube column and the female screw of the anchor plate. Then, by tightening the end of the male screw part to the anchor plate and further tightening, the anchor plate is peeled from the nut and separated from the head nut by a certain distance to form the anchor part. It is characterized in that the steel pipe column and the joint metal are fastened with the nut on the inner side of the steel pipe column, and the anchor part and nut of the head tightening high-strength bolt are buried in the concrete that is filled and solidified inside the steel pipe column. When High-strength bolted connection structure of concrete filled tubular columns H-section beams that.

(2). In a high-strength bolted structure of a square or circular concrete-filled steel tubular column and an H-shaped cross-section beam using a joint metal, a nut (and a washer) is previously fixed to the inner side of the steel tubular column, and the outer surface of this steel tubular column From the outer surface of the contacted metal fitting, insert a head tightening high-strength bolt that has a male screw in the bolt hole and an anchor portion consisting of a male screw or a ribbed shaft portion at the tip side, and insert the male screw into the steel pipe. By screwing and fastening to a nut that is fixed in advance to the inside of the column, the steel pipe column and the joint metal are fastened between the head of the head tightening high-strength bolt and the nut on the inside of the steel pipe column. A high-strength bolted joint structure of a concrete-filled steel tubular column and an H-shaped cross-section beam, characterized in that the anchor portion of the tightening high-strength bolt is buried in concrete that is filled and solidified inside the steel tubular column.

(3). In (1) or (2), the means for fixing the nuts (and washers) to the steel pipe columns is adhesion or brazing, which is a high-strength bolt joint structure for a concrete-filled steel pipe column and an H-shaped cross-section beam. (4). In (1), the high-strength bolt joint structure of a concrete-filled steel pipe column and an H-shaped cross-section beam, wherein the anchor plate has a fastening portion with a male screw of a head-fastening high-strength anchor bolt. (5). In (1), the high-strength bolt joint structure of a concrete-filled steel pipe column and an H-shaped cross-section beam is characterized in that the light joint means of the anchor plate to the nut is adhesion or brazing. (6). In any one of (1) or (3) to (5), the anchor plate of the head-fastening high-strength bolt has a diameter larger than that of the shaft portion , and the concrete-filled steel pipe column and H-shaped cross-section beam are provided. High strength bolt joint structure. (7). In any one of (1) to (6), the head tightening high-strength bolt has a pin tail for introducing torque on the head, and a tightening torque with a larger diameter than the head can be applied to the seat surface of the head. High-strength bolt joint structure of concrete-filled steel pipe column and H-shaped cross-section beam, characterized by inserting and abutting various polygonal washers.

(8). A head comprising: a head portion; a shaft portion having a male screw screwed with a nut and a male screw screwed with a female screw of the anchor plate; and a washer which is inserted through the shaft portion and abuts on a seat surface of the head portion. Tightening high strength anchor bolt. (9). In (8), the diameter of the male screw to be screwed with the nut and the diameter of the male screw to be screwed with the female screw of the anchor plate are made to be the same and continuous, and the fastening / fixing portion of the anchor plate is formed on the anchor plate. High-strength anchor bolt that tightens the head. (10) In (8), the diameter of the male screw screwed to the female screw of the anchor plate is made smaller than the diameter of the male screw screwed to the nut to form a diameter step portion, and the anchor plate is fastened at this diameter step portion. High-strength anchor bolts that tighten the head. (11). A head portion, a male screw portion that engages with the nut, and a shaft portion that includes a male screw forming portion or a rib forming portion that serves as an anchor portion; and a washer that is inserted through the shaft portion and abuts against a seat surface of the head portion. High-strength anchor bolt that tightens the head. (12). In any one of (8) to (11), a head is provided with a pin tail for introducing torque, and a washer that is inserted through the shaft and abuts against a seat surface of the head has a larger diameter than the head and can provide tightening torque. Anchor bolt for tightening the head, which is a polygonal washer.

(13). A method for installing nuts inside a steel pipe column obtained by two-seam welding a pair of channel members or a semi-circular member consisting of 1/2 of a circular steel pipe, wherein a pair of channel members before two-seam welding Alternatively, a bolt hole is pre-drilled at a predetermined position of the semi-circular material, and a washer fixed to the nut is abutted and fixed on the inner surface of the channel or semi-circular material so that the center of the washer matches the center of the bolt hole. A method for installing a nut inside a steel pipe column, which comprises welding a channel material or a semicircular material by two seams. (14). (13) The method for installing a nut inside a steel pipe column, wherein the nut is a lightly bonded anchor plate having a female screw hole.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention is a rectangular or circular concrete-filled steel pipe column using a joint metal such as a T-shaped joint or an L-shaped joint (hereinafter referred to as "joint joint") and a tensile high-strength bolt ( (CFT column) and H-section beam such as H-section steel beam in high-strength bolt joint structure, joint metal and steel pipe column (CF
It is applied when a high-strength bolt is connected to a T column. In the present invention, in a high-strength bolt joint structure of a rectangular or circular concrete-filled steel pipe column and an H-shaped cross-section beam using a joint metal, a nut (and a washer) to which an anchor plate is lightly joined in advance inside the steel pipe column is used. Insert the head-tightening high-strength bolt from the outside into the bolt holes of the steel pipe column and the metal fitting that have been fixed, and form the anchor on the inside of the steel pipe column and fasten it with the nut. The high-strength bolts are fastened by tightening the steel pipe column and the metal fitting between the head and the nut, and the anchor parts of the high-strength bolts are filled by filling the steel pipe column with the solidified concrete. The resistance of concrete is applied to the joint of steel pipe columns through a head-fastening high-strength bolt to improve the joint performance (rigidity, yield strength) against the compressive force and tensile force at this joint.

Further, the nut is fixed to the inside of the steel pipe column, and the metal fitting for the steel pipe column is inserted into the bolt hole from the outside using a head tightening high-strength bolt and screwed and fastened to the nut. From the above, it is possible to arbitrarily determine the mounting order of the upper and lower joint metal fittings at the construction site, and when attaching the H-shaped cross-section beams to the upper and lower joint metal fittings, it is possible to avoid interference between the H-shaped cross-section beam and the joint metal fittings. The workability at the site can be improved. Further, basically, since the joining structure does not employ welding joining, the processing load can be reduced.

In the present invention, the nut is fixed inside the steel pipe column in advance. However, when the fixing position of the nut is on the inside of the steel pipe column which is out of reach, the nut fixing method is as follows. The main method is to insert a nut installation device into the nut and fix the nut. However, in the case of a steel pipe column obtained by 2 seam welding, the nut is preliminarily attached to a pair of groove or semi-circular material before 2 seam welding. There is a method of fixing (and a washer), and a method of fixing a nut when a person enters inside when the steel pipe column is large. When the washer is brought into contact with the nut, the washer is fixed to the nut in advance and the washer is fixed to the steel pipe column. Adhesion, brazing, welding or the like can be selectively used as the fixing means. When forming the anchor part of the head tightening high-strength bolt with an anchor plate, bond the anchor plate to the nut or by brazing, etc., with a joining force that is enough to peel off by tightening the head tightening high-strength bolt. To do.

Basically, there are the following two types of methods for forming the anchor portion of the head tightening high-strength bolt. Anchor plate A circular, square, or polygonal anchor plate with a diameter larger than the shaft of the head tightening bolt, basically with a female thread formed that is screwed into the male thread at the end of the head tightening high-strength bolt. Is. This anchor plate is lightly joined to the nut in advance by gluing or brazing, and screwed with the male screw part at the tip of the high-strength bolt that tightens the head.
Tighten and tighten with a tightening force that is equal to or greater than the light joining force with the nut to separate it from the nut, and separate it to a predetermined position to form the anchor part. When using an anchor plate, it depends on the size of the steel pipe column and the shaft diameter of the bolt, but it is about 0.1 to 0.5 times the steel pipe diameter from the tip of the nut inside the steel pipe that functions for fastening. The anchor plate diameter (1
The side) is preferably about 1.5 to 10.0 times the shaft diameter and does not interfere with the parallel, orthogonal, and facing anchor plates. With a male screw or a rib A male screw or a rib is formed on a shaft portion which is a tip side of a nut fastening portion of a head tightening high-strength bolt, and the shaft portion having the male screw or the rib is used as an anchor portion. When the anchor portion is formed by a male screw, this male screw may be formed continuously with the male screw that is screwed with the nut. Also, the length of the anchor portion is such that it does not interfere with the anchor plates that are orthogonal and face each other. In the case of these head-tightening high-strength bolts, the shaft portion formed with the male screw or the rib that is the anchor portion functions in the same manner as the reinforcing bar, and the anchor effect is obtained by utilizing the adhesion effect with concrete.

As the head-fastening high-strength bolt having the anchor portion of the present invention, that is, the head-fastening high-strength anchor bolt, for example, one having the following structure can be used. [Those using an anchor plate] include: a. There is a head portion, a shaft portion having a male screw screwed with a nut and a male screw screwed with a female screw of an anchor plate, and a washer which is inserted into the shaft portion and abuts on a seat surface of the head portion. In this case, by tightening the head-tightening high-strength bolt, the male screw tip is fastened to the anchor plate, the anchor plate is peeled from the nut, and the anchor part is formed to form the anchor part at a predetermined position (in this case, stop screwing). Required). This fastening portion may be formed on the head tightening high-strength bolt side or on the anchor plate side. a-1. The diameter of the male screw to be screwed is the same as the diameter of the male screw to be screwed to the female screw of the anchor plate, and they are continuous, and the fastening / fixing part of the anchor plate is formed on the anchor plate.
In this case, the female screw of the anchor plate can be formed halfway, or the female screw hole of the anchor plate can be penetrated to fix the stopper plate and close the female screw hole to form a screwing stop portion for the anchor plate. . a-2. The diameter of the male screw that is screwed to the female screw of the anchor plate is smaller than the diameter of the male screw that is screwed with the nut to form a stepped portion of the diameter. It is also possible to make the fastening with and more stable. In this case, the screwing stop portion with respect to the anchor plate can be formed by the stepped portion of the diameter of the head tightening high-strength bolt male screw.

As the one using a male screw or a rib, a. There is a head portion, a male screw portion that is screwed with a nut and a shaft portion that has a male screw portion that serves as an anchor portion, and a washer that is inserted through the shaft portion and abuts against a seat surface of the head portion. The male screw that serves as the anchor portion may be continuous with the male screw that engages with the nut. b. There is a head portion, a male screw portion that is screwed with a nut, a shaft portion that forms a rib that serves as an anchor portion, and a washer that is inserted into the shaft portion and abuts on a seat surface of the head portion. Here, the shaft portion in which the rib serving as the anchor portion is formed may be integrally formed with the shaft portion in which the male screw is formed, or may be welded to the shaft portion in which the male screw is formed. The above-mentioned head tightening high-strength bolts are used to insert anchors on the inner side of the steel pipe column by inserting them into the bolt holes from the outside of the metal fittings that abut the steel pipe column. If a square washer with a larger diameter than the head that contacts the seat surface of the head is formed by forming a pin tail for use, it is possible to tighten the head with torque introduced using a dedicated fastener. Become.

[0019]

[Embodiment 1] Embodiment 1 of the present invention will be described below with reference to FIGS. This Example 1 is
In a joint structure of a square or circular concrete-filled steel tubular column (CFT column) and an H-shaped cross-section beam using a pair of upper and lower T-shaped joints and high-strength bolts, upper and lower T-shaped joints 2a, 2b
This is a case where the present invention is applied to the joining of the steel pipe column 1 and the steel pipe column 1. In this Example 1, as the steel pipe column 1, one obtained by two-seam welding of a pair of groove-shaped members or half-circular members of circular steel pipes was used, and T-shaped metal fittings 2a and 2b were used. As the high-strength bolt for joining the steel pipe columns 1, the head-fastening high-strength bolt according to the present invention capable of forming an anchor portion was used. A normal high-strength bolt 5 was used to join the upper and lower T-shaped joining hardware 2a, 2b and the H-shaped cross-section beam 4. In addition, the H-shaped cross-section beam 4 is usually attached to the side surfaces 1 to 4 of the steel pipe column 1, but here, FIG. 1 (a), (b) and FIG.
As shown in (a) and (b), when the H-shaped cross-section beam 4 is attached to the four side surfaces of the steel pipe column 1, the details of the joint structure will be representatively described with a partial view of one side surface.

1A, 1B and 2A,
In (b), a pair of upper and lower T-shaped metal fittings 2a and 2 are provided on the four side surfaces of the steel pipe column 1 filled with concrete 6, respectively.
The vertical plates 2f of b are joined at a predetermined interval by head-tightening high-strength bolts 12, and the upper flange 4a of the H-shaped cross-section beam 4 is higher than the lower surface of the horizontal plate 2u of the upper T-shaped joint metal 2a. Lower flange 4 of H-shaped cross-section beam 4 joined by force bolt 5
b is brought into contact with the upper surface of the horizontal plate 2u of the lower T-shaped joint metal 2b and is joined by a high-strength bolt 5. The head-tightening high-strength bolt 12 is inserted into a bolt hole from the outside of the T-shaped metal fitting abutted on the steel pipe column 1 and screwed and fastened to a nut 14 previously fixed inside the steel pipe column 1. An anchor portion formed by an anchor plate 13 is formed at the tip portion inside the steel pipe column 1. The anchor portion 13 is filled inside the steel pipe column 1.
Buried in solidified concrete 6
Is applied to the joint portion of the steel pipe column 1 via the head-tightening high-strength bolt 12 to improve the joint portion performance (rigidity, yield strength) against the compressive force and the tensile force at this joint portion.

More specifically, the head-tightening high-strength bolt 12 is, as shown in FIGS. 3, 4 (a) and 4 (b), a head 12a having a pin tail 12p for introducing torque and a male screw portion. It is composed of a shaft portion 12b having 12s, and a hexagonal washer 15 which is inserted into the shaft portion 12b and comes into contact with the seat surface of the head. This washer 15 has a dedicated fastener (conceptually includes an inner cylinder and an outer cylinder that interlock with each other to enable torque introduction, and the outer cylinder is engaged with the washer 15 and the inner cylinder is engaged with the pin tail 12p. Together,
A structure that tightens the inner cylinder by turning it. (Not shown)
Is to engage with a fastener (outer cylinder) in order to apply a predetermined tightening force to the pin tail 12p, and has a larger diameter than the head portion 12a and is formed in a square shape. A nut 14 screwed to the head tightening high-strength bolt 12 is a washer 16 fixed, and is fixed inside the steel pipe column 1 through the washer 16. High strength bolt 1
The anchor plate 13 having a female screw 13s that is screwed and fastened to the two male screws 12s is fixed.

Steel pipe column 1 and washer 16, washer 16 and nut 1
4, as a means for fixing the nut 14 and the anchor plate 13,
For example, adhesion (ba, bb) as shown in FIG.
Brazing (sa, sb), as shown in FIG.
Alternatively, there is welding or the like, but here, adhesion (ba, b
b) is adopted, the adhesion between the steel pipe column 1 and the washer 16, the washer 16 and the nut 14 is strongly adhered ba, and the adhesion between the nut 14 and the anchor plate 13 is peeled off by tightening the head tightening high-strength bolt 12, The light adhesion bb was such that it could be peeled off by this tightening force. The anchor plate 13 has a female screw 13s that is screwed into the male screw 12s of the head tightening bolt 12, and as shown in, for example, FIGS. Square thing 13b
However, a circular one 13 is used here. Female screw 13s of anchor plate 13
Is formed halfway here, and the head tightening high strength bolt 1
It is the fastening part of the male screw tip of No.2.

Washer 16 and nut 1 inside the steel pipe column 1
4, the work of bonding the anchor plate 13 is shown in FIG.
As shown in (b), (c) and (d), a pair of channel members C
a and Cb or semi-circular members Cc and Cd are welded by 2 seams to obtain a steel pipe column 1, at a predetermined position of a pair of channel members Ca and Cb or semi-circular members Cc and Cd before 2 seam welding. After the bolt hole Cp is opened, the washer 16, the nut 14, and the anchor plate 13 that have been bonded in advance are bonded according to the bolt hole Cp, and a pair of channel members Ca and Cb or semicircular members Cc and Cd are bonded.
When 2 was seam welded to form the steel pipe column 1, the washer 16, the nut 14, and the anchor plate 13 were positioned at predetermined positions inside thereof. When joining the steel pipe column 1 and the T-shaped joint hardware 2a, 2b with the head-tightening high-strength bolt 12, as shown in FIG. T-shaped metal fitting 2 that abuts the steel pipe column 1
Inserted into the bolt hole 2p from the outside of the vertical plate 2f of a and 2b, and screwed into the nut 14 and the female screw 13s of the anchor plate 13 through the bolt hole 1p of the steel pipe column 1 and the washer 16 fixed inside the steel pipe column 1. And attach the tip of the male screw 12s to the anchor plate 1
3 is fastened to the female screw 13s and further tightened to separate the anchor plate 13 from the nut 16,
As shown in (b), when the predetermined position inside the steel pipe column 1 is reached, the fastening with the nut 16 is completed, and the washer 15 and the nut 16 that are in contact with the head 12a of the head fastening bolt 12 are in contact with each other.
The steel tube column 1 and the T-shaped joint hardware 2a, 2b are fastened between them. As described above, the head tightening high-strength bolt 12 can be tightened by using a dedicated fastener and breaking the pin tail 12p to introduce torque.

After fastening the steel pipe column 1 and the T-shaped metal fittings 2a, 2b, the steel pipe column 1 is filled with concrete 6 to be solidified, and the anchor plate 13 to the nut 16 are buried in the concrete 6. . In this manner, after the high-strength bolts 12 for tightening the head are used, the rectangular or circular concrete-filled steel tubular column 1 and the T-shaped joints 2a and 2b are joined together by high-strength bolts, and then the T-shaped joints 2a and 2b are connected to H The joint structure of the concrete-filled steel tubular column and the H-shaped cross-section beam as shown in FIGS. 1 (a) and 1 (b) and FIGS. 2 (a) and 2 (b) is obtained by joining the cross-section beam 4 with high-strength bolts. be able to. Attach each H-shaped cross-section beam 4 to the T-shaped joint hardware 2a, 2b with a high-strength bolt 5
When joining with each other, the tip surface of each H-shaped cross-section beam 4 is positioned so as to abut the vertical plate 2f of the T-shaped metal fittings 2a, 2b (however, there is a gap and does not abut), and the upper flange 4a is on the upper side. A state in which the lower flange 4b is brought into contact with the upper surface of the horizontal plate 2u of the lower T-shaped metal fitting 2b while being joined to the lower surface of the horizontal plate 2u of the T-shaped metal fitting 2a by the high-strength bolt 5. It is joined by the high-strength bolt 5.

In this joint structure, the T-shaped joint metal 2
Since a and 2b are inserted into the bolt holes from the outside using the head tightening high-strength bolts 12 and screwed and fastened with the nuts, the upper and lower T-shaped metal fittings 2a and 2b can be attached in any order at the construction site. Can be decided, upper and lower T-shaped metal fittings 2a, 2
When attaching the H-section beam 4 to b,
It is possible to arbitrarily avoid interference with the shape-bonded metal parts and improve workability at the site. T-shaped metal fitting 2
The H-shaped cross-section beam 4 is usually attached to a and 2b by T
It is performed after joining the shape-joining metal fittings 2a and 2b to the steel pipe column 1, but the H-shaped cross-section beam 4 is connected to the horizontal plate 2 of the T-shape fitting hardware 2a and 2b.
It is also possible to join the vertical plates 2f of the T-shaped metal fittings 2a, 2b to the steel pipe column 1 after pre-joining with u.

In this Example 1, the anchor plate 13 to the nut 14 of the head-tightening high-strength bolt 12 is buried in the concrete 6 that is filled and solidified in the steel pipe pillar 1 to obtain the solidified concrete. A resistance force is applied to the joint portion of the steel pipe column 1 via the head-tightening high-strength bolt 12, and the joint portion performance (rigidity and proof stress) against the compressive force and the tensile force at this joint portion can be improved. Also,
Basically, since the joining structure does not adopt welding, the processing load can be reduced.

[Second Embodiment] A second embodiment of the present invention will be described below with reference to FIGS. 8 (a), 8 (b) and 8 (c). This Example 2 is similar to Example 1, and in the joining structure of a concrete-filled steel pipe column (CFT column) and an H-shaped cross-section beam using a pair of upper and lower T-shaped joints and high-strength bolts, upper and lower T-shaped joints. This is a case where the present invention is applied to the joining of the steel pipe columns 1 with 2a and 2b, and differs from Example 1 in that the structure of the anchor plate fastened to the tip end portion of the head fastening bolt 12 is different. Since the other parts are almost the same as those in the first embodiment, the description thereof will be omitted and the part relating to the anchor plate will be mainly described.

As shown in FIG. 8A, the head tightening high-strength bolt 12, the nut 14 and the washer 16 screwed to the head tightening high-strength bolt 12, are the same as those in the first embodiment. ,
The nut 14 and the washer 16 are fixed inside the steel pipe column 1. An anchor plate 13 'having a female screw 13s that is screwed and fastened to the male screw 12s of the head-fastening high-strength bolt 12 is fixed to the nut 14. This anchor plate 13 '
Is formed so that a screw hole formed by a female screw 13s penetrates through the anchor plate 13 '. The screw hole is closed by a stopper plate 17 strongly bonded to the anchor plate 13', and the anchor plate 13 'is closed. When the tip of the male screw 12s of the head tightening high-strength bolt 12 screwed into the female screw 13s abuts against the stopper plate 17, the anchor plate 13 'is fastened to the tip of the head tightening high-strength bolt 12. That is, the stopper plate 17 serves as a fastening portion with the head-fastening high-strength bolt 12.

When joining the steel pipe column 1 and the T-shaped fittings 2a, 2b with the head-tightening high-strength bolt 12, as shown in FIG.
As shown in (b), the head-tightening high-strength bolt 12 in which the washer 15 is inserted is brought into contact with the steel pipe column 1, and the T-shaped metal fitting 2a,
Inserted into the bolt hole 2p from the outside of the vertical plate 2f of 2b,
Through the bolt hole 1p of the steel pipe column 1 and the washer 16 fixed inside the steel pipe column 1, the nut 14 and the female screw 13s of the anchor plate 13 'are screwed together, and the tip of the male screw 12s is attached to the anchor plate 1.
By fastening to the female screw 13s of 3'and further tightening, the anchor plate 13 'is separated from the nut 14,
As shown in FIG. 8 (c), when reaching a predetermined position inside the steel pipe column 1, the fastening with the nut 14 is completed, and the steel pipe column 1 is connected between the head 12 a of the head fastening bolt 12 and the nut 14. The vertical plates 2f of the T-shaped metal fittings 2a and 2b are fastened. After fastening the steel tube column 1 and the T-shaped metal fittings 2a, 2b, concrete is filled and solidified in the steel tube column 1, and the concrete plate 6 is embedded with the anchor plate 13 'fastened to the stopper plate 17 to the washer 16.

After the concrete-filled steel tubular column 1 and the T-shaped joints 2a and 2b are joined in this manner, the H-shaped cross-section beam 4 is joined to the horizontal plate 2u of the T-shaped joints 2a and 2b by high-strength bolting. 1 (a), 1 (b) and 2
It is possible to obtain a joint structure of a concrete-filled steel tubular column and an H-shaped cross-section beam as shown in (a) and (b). In this Example 2, the resistance of the filled concrete is applied to the joint of the steel pipe column via the high-strength bolt to improve the joint performance (rigidity, yield strength) against the compressive force and the tensile force at this joint. The other effects are almost the same as those in the first embodiment.

[Third Embodiment] A third embodiment of the present invention will be described below with reference to FIGS. 9 (a), 9 (b) and 9 (c). Similar to the first and second embodiments, this third embodiment is a joint structure of a concrete-filled steel pipe column (CFT column) and an H-shaped cross-section beam using a pair of upper and lower T-shaped joints and high-strength bolts. The present invention is applied to the joining of the metal fittings 2a, 2b and the steel pipe column 1, and Examples 1 and 2 are the tip structure of the head fastening bolt and the anchor plate 13 fastened to the tip. The structure of "" is different. The other parts are almost the same as those of the first and second embodiments, and therefore the description thereof will be omitted and the parts relating to the head tightening high strength bolt 12 'and the anchor plate 13 "will be mainly described. To do.

The head tightening high-strength bolt 12 'is shown in FIG. 9 (a).
As shown in FIG. 1, a head 12 a having a pin tail 12 p for introducing torque and a nut 14 fixed inside the steel pipe column 1.
The male screw portion 12s that is screwed and fastened to the nut 14 and the shaft portion 12c having the male screw portion 19s that is smaller in diameter than the male screw portion 12s that is screwed and fastened to the anchor plate 13 ″ bonded to the nut 14 are provided, and the end of the male screw portion 12s and the male screw A step portion is formed at the boundary of the portion 19s. This step portion becomes a fastening portion of the anchor plate 13 "when the anchor plate 13" is screwed into the male screw portion 19s. ′ Shaft part 12c
A hexagonal washer 15 that contacts the seating surface of the head portion 12a is inserted through the. This washer 15 is the washer 15 of the first embodiment.
Is the same as, and functions similarly. The nut 14 that is screwed into the head tightening high-strength bolt 12 ′ is fixed to the washer 16, and is fixed inside the steel pipe column 1 via the washer 16. An anchor plate 13 ″ having a female screw 20s that is screwed and fastened to a small-diameter male screw 19s at the tip of the high-strength bolt 12 ′ is lightly adhered. The female screw 20s penetrates the anchor plate 13 ″.

Steel pipe column 1 and washer 16, washer 16 and nut 1
4, the fixing means of the nut 14 and the anchor plate 13 ″ is the same as that of the first embodiment. When the steel pipe column 1 and the T-shaped joint metal fittings 2a, 2b are joined by the head tightening high-strength bolt 12 ′,
As shown in FIG. 9 (b), a head tightening high-strength bolt 12 ′ having a washer 15 inserted thereinto is inserted into the bolt hole 2 p from the outside of the vertical plate 2 f of the T-shaped joint hardware 2 a, 2 b that is in contact with the steel pipe column 1. After inserting, through the bolt hole 1p of the steel pipe column 1 and the washer 16 fixed inside the steel pipe column 1, the male screw 12s is screwed into the nut 14, and the male screw 19s at the tip is the female screw 2 of the anchor plate 13 ″.
The anchor plate 13 ″ is fastened to the step portion formed on the boundary between the end of the male screw portion 12s and the male screw portion 19s of the head-fastening high-strength bolt 12 ′. By tightening 12 ′, the anchor plate 13 ″ is separated from the nut 14, and when the anchor plate 13 ″ reaches a predetermined position inside the steel pipe column 1, as shown in FIG. After the fastening is completed, the steel pipe column 1 and the vertical plate 2f of the T-shaped joining hardware 2a, 2b are fastened between the head 12a of the head fastening bolt 12 'and the nut 14.
After fastening the steel pipe column 1 and the T-shaped metal fittings 2a, 2b, the steel pipe column 1
Concrete is filled and solidified inside, and the anchor plate 13 ″ to the washer 16 are buried in the concrete 6.

After joining the concrete-filled steel tubular column 1 and the T-shaped joints 2a and 2b in this manner, the H-shaped cross-section beam 4 is joined to the horizontal plate 2u of the T-shaped joints 2a and 2b by high strength bolts. 1 (a), 1 (b) and 2
It is possible to obtain a joint structure of a concrete-filled steel tubular column and an H-shaped cross-section beam as shown in (a) and (b). In this Example 3, the effect of increasing the resistance of the filled concrete to the joint of the steel pipe columns through the high-strength bolts and improving the joint performance (rigidity, yield strength) against the compressive force and tensile force at this joint The other effects are the first embodiment and the second embodiment.
It is almost the same as the case.

[Fourth Embodiment] A fourth embodiment of the present invention will be described below with reference to FIGS. 10 (a), (b), 11 (a), (b) and FIGS. 12 (a), (b). explain. Similar to Example 1, this Example 4 is a concrete-filled steel pipe column (CFT) using a pair of upper and lower T-shaped joints and high-strength bolts.
This is a case where the present invention is applied to the joining of the upper and lower T-shaped metal fittings 2a, 2b and the steel pipe pillar 1 in the joining structure of the column) and the H-shaped cross-section beam. In the fourth embodiment, as in the first to third embodiments, as the steel pipe pillar 1, a pair of channel members or semicircular members is used.
T-shaped metal fitting 2 that is obtained by seam welding
As a high-strength bolt for joining the a and 2b and the steel pipe column 1, the head tightening high-strength bolt 12 ″ according to the present invention, which is different from those in Examples 1 to 3 and has an anchor portion formed by a male screw 12 s, is used. This is basically different from Examples 1 to 3, and a washer 16 and a nut 1 are provided inside the steel pipe column 1.
4 is fixed, but the anchor plate is not adhered to the nut 14. Upper and lower T-shaped joint hardware 2a, 2b and H
A normal high-strength bolt 5 was used to join the shaped cross-section beams 4.
In addition, the H-shaped cross-section beam 4 is normally 1 to 4 of the steel pipe column 1.
Although it is attached to the side surface, here, FIG.
As shown in (b) and FIGS. 11 (a) and (b), when the H-shaped cross-section beam 4 is attached to the four side surfaces of the steel pipe column 1, the details of the joint structure will be representatively described with a partial view of one side surface. .

10 (a), 10 (b) and 11
In (a) and (b), the vertical plate 2f of a pair of upper and lower T-shaped metal fittings 2a and 2b is provided on each of the four side surfaces of the steel pipe column 1 filled with concrete 6 at a predetermined interval, and the head tightening height is increased. The upper flange 4a of the H-shaped cross-section beam 4 is joined by the force bolt 12 ", and the horizontal plate 2 of the upper T-shaped joint metal 2a.
The lower flange 4b of the H-shaped cross-section beam 4 is joined to the upper surface of the horizontal plate 2u of the lower T-shaped joint metal 2b by being joined to the lower surface of u by the high-strength bolt 5, and is joined by the high-strength bolt 5. The head tightening high-strength bolt 12 ″ is inserted into the bolt holes 2 p, 1 p from the outside of the T-shaped metal fittings 2 a, 2 b that are in contact with the steel pipe column 1, and is fixed in advance inside the steel pipe column 1 by the nut 14. And is fastened to the inside of the steel pipe pillar 1 to form an anchor portion with a male screw 12s (here, it has an effect of adhering to the concrete 6) inside the steel pipe column 1. The anchor portion with this male screw 12s is formed. , Is buried in concrete 6 filled and solidified inside the steel pipe pillar 1, and the resistance force of the concrete 6 due to the adhesive effect is applied to the joint portion of the steel pipe pillar 1 via the head-tightening high-strength bolts 12. The joint performance (rigidity and proof stress) with respect to the compressive force and the tensile force is improved.

More specifically, the head-tightening high-strength bolt 12 "is, as shown in FIG. 12 (a), a head 12a having a pin tail 12p for introducing torque and an anchor portion screwed to a nut 14. 12d having a male screw portion 12s
And a hexagonal washer 15 that is inserted into the shaft portion and abuts against the seating surface of the head portion 12a. This washer 15 corresponds to the first embodiment.
The washer 15 is similar to the washer 15 and functions similarly. A nut 1 that is screwed into this head tightening high strength bolt 12 "
4 is a washer 16 fixed by strong adhesion ba, and is strongly bonded ba inside the steel pipe column 1 through the washer 16 in advance.
It is fixed by. The work of adhering the washer 16 and the nut 14 to the inside of the steel pipe column 1 was performed when the pair of groove members or semicircular members were seam-welded to obtain the steel pipe column 1, as in the first to third embodiments.

Steel pipe column 1 by head tightening high-strength bolt 12 "
When joining the T-shaped joining hardware 2a, 2b to
As shown in (b), the T-shaped metal fitting 2 in which the head-tightening high-strength bolt 12 ″ having the washer 15 inserted therein is brought into contact with the steel pipe column 1
a and 2b are inserted into the bolt hole 2p from the outside of the vertical plate 2f, and the male screw 12s is screwed and fastened to the nut 14 through the bolt hole 1p of the steel pipe column 1 and the washer 16 fixed inside the steel pipe column 1. Then, the steel pipe column 1 and the T-shaped metal fittings 2a, 2b are fastened between the head 12a of the head fastening bolt 12 "and the nut 14. At this time, the male screw 1 on the tip side from the fastening portion of the nut 14 is fastened.
The 2s portion is used as the anchor portion. For tightening the head tightening high-strength bolt 12 ″, as in the first embodiment, a dedicated fastener is used to break the pin tail 12 p, and torque-introduced tightening is possible.

After fastening the steel pipe column 1 and the T-shaped metal fittings 2a, 2b, the inside of the steel pipe column 1 is filled with concrete 6 to be solidified, and in this concrete 6, the anchor portion from the male screw 12s to the washer 16 is buried. . In this way
After the high-strength bolts 12 ″ are used to fasten the concrete-filled steel tubular column 1 and the T-shaped joints 2a and 2b using the head-tightening high-strength bolts 12 ″, the H-shaped cross-section beams 4 are attached to the T-shaped joints 2a and 2b by high-strength bolts. By joining, it is possible to obtain a joining structure of the concrete-filled steel tubular column and the H-shaped cross-section beam as shown in Fig. 10 (a), (b) and Fig. 11 (a), (b). In order to apply a resistance force due to an adhesion effect of the anchor portion and the concrete by the male screw 12s of the head tightening high strength bolt 12 ″ to the joint portion of the steel pipe column 1 via the head tightening high strength bolt 12 ″, the anchor plate Although the effect is slightly inferior to the cases of Examples 1 to 3 in which the above-mentioned method is used, it is possible to improve the joint performance (rigidity, proof stress) against the compressive force and the tensile force at this joint. Without male screw Since the 2s part is lengthened to serve as the anchor part, the structure is simpler and the processing and construction burden can be reduced as compared with Examples 1 to 3. Other effects are substantially the same as Examples 1 to 3. is there.

[Fifth Embodiment] A fifth embodiment of the present invention will be described below with reference to FIGS. 13 (a), (b), 14 (a), (b) and FIGS. 15 (a), 15 (b). explain. In this fifth embodiment, as in the first embodiment, a concrete-filled steel pipe column (CFT) using a pair of upper and lower T-shaped joints and high-strength bolts is used.
This is a case where the present invention is applied to the joining of the upper and lower T-shaped metal fittings 2a, 2b and the steel pipe pillar 1 in the joining structure of the column) and the H-shaped cross-section beam. In the fifth embodiment, as in the first to fourth embodiments, a pair of channel members or semicircular members is used as the steel pipe column 1.
T-shaped metal fitting 2 that is obtained by seam welding
As a high-strength bolt for joining a and 2b to the steel pipe column 1, a head-fastening high-strength bolt 2 according to the present invention in which an anchor portion is formed by a plurality of rib-shaped ribs 21 different from the first to fourth embodiments.
2 is basically different from Examples 1 to 4 in that the washer 16 and the nut 14 are fixed inside the steel pipe column 1 as in Example 4, but the nut is not used. No anchor plate is adhered to 14. A normal high-strength bolt 5 was used to join the upper and lower T-shaped metal fittings 2 a, 2 b and the H-shaped cross-section beam 4. In addition, the H-shaped cross-section beam 4 is normally attached to the side surfaces 1 to 4 of the steel pipe column 1, but here, FIGS. 13 (a) and 13 (b) and FIG. 14 (a),
As shown in (b), the H-shaped cross-section beams 4 are provided on the four side surfaces of the steel pipe column 1.
In the case of attachment, details of the joint structure will be representatively described with a partial view of one side surface.

13 (a), 13 (b) and 14
In (a) and (b), the vertical plate 2f of a pair of upper and lower T-shaped metal fittings 2a and 2b is provided on each of the four side surfaces of the steel pipe column 1 filled with concrete 6 at a predetermined interval, and the head tightening height is increased. They are joined by force bolts 22 and have an H-shaped cross-section beam 4
The upper flange 4a is a horizontal plate 2u of the upper T-shaped metal fitting 2a.
Of joined at high strength bolt 5 on the lower surface, the lower flange 4b of the H-section beams 4 are joined in abutted high strength bolt 5 on the upper surface of the horizontal plate 2u lower T-shaped junction gold product 2b. The head tightening high-strength bolt 22 is a T-shaped metal fitting 2 abutted on the steel pipe column 1.
Inserted into the bolt holes 2p, 1p from the outside of a, 2b,
A plurality of collar-shaped ribs 2 are screwed and fastened to a nut 14 which is fixed inside the steel pipe column 1 in advance, and inside the steel pipe column 1, a plurality of collar-shaped ribs 2 are provided at the tip.
An anchor portion 1 (here, an anchor portion having an effect of adhering to the concrete 6) is formed. The anchor portion by the rib 21 is buried in the concrete 6 filled and solidified inside the steel pipe column 1, and the resistance force of the concrete 6 due to the adhesion effect is tightened by the head tightening bolt 22 to join the steel pipe column 1 Is applied to improve the joint performance (rigidity, proof stress) against the compressive force and tensile force at this joint.

More specifically, the head-tightening high-strength bolt 22 is, as shown in FIG. 15 (a), a head 22a having a pin tail 22p for introducing torque, and a male screw 22s screwed to the nut 14. A plurality of ribs 2 with a brim that serves as an anchor
1 has a shaft portion 22b, and a head portion 22 which is inserted through the shaft portion 22b.
The hexagonal washer 15 is in contact with the seat surface of a. The washer 15 is similar to the washer 15 of the first embodiment and functions similarly. The rib 21 in the form of a collar is used for the nut 14
And a height of the rib 21 from the outer peripheral surface of the shaft portion 22b to 0.
1 to 0.3 times and the pitch is 0.5 to 5 times. A nut 1 that is screwed into the head-tightening high-strength bolt 22.
4 is a washer 16 fixed by strong adhesion ba, and is strongly bonded ba inside the steel pipe column 1 through the washer 16 in advance.
It is fixed by. The work of adhering the washer 16 and the nut 14 to the inside of the steel pipe column 1 was performed in the process of obtaining the steel pipe column 1 by two-seam welding a pair of channel members or semicircular members, as in the first to third embodiments.

In the case of joining the steel pipe column 1 and the T-shaped fittings 2a and 2b with the head-fastening high-strength bolt 22, FIG.
As shown in (b), the head-tightening high-strength bolt 22 in which the washer 15 is inserted is in contact with the steel pipe column 1, and the T-shaped joint metal 2a,
Inserted into the bolt hole 2p from the outside of the vertical plate 2f of 2b,
Through the bolt hole 1p of the steel pipe column 1 and the washer 16 fixed inside the steel pipe column 1, the male screw 22s portion is screwed and fastened to the nut 14, and the head pipe 22a of the head tightening bolt 22 and the nut 14 are connected to each other. 1 and T-shaped metal fittings 2a and 2b are fastened. At this time, the shaft portion 22b formed with the rib 21 on the tip side from the fastening portion with the nut 14 is used as the anchor portion. For tightening the head tightening high-strength bolt 22, torque is introduced by breaking the pin tail 22p using a dedicated fastener as in the first embodiment.

After fastening the steel pipe column 1 and the T-shaped metal fittings 2a, 2b, the inside of the steel pipe column 1 is filled with concrete 6 to be solidified, and in this concrete 6, the anchor portion from the rib 21 to the washer 16 is buried. . In this way, the concrete-filled steel pipe column 1 is secured by using the head-tightening high-strength bolt 22.
After joining the T-shaped joining hardware 2a and 2b with high-strength bolts,
13 (a), 13 (b) and 14 by connecting the H-shaped cross-section beam 4 to the shape-joining metal fittings 2a, 2b by high-strength bolt bonding.
It is possible to obtain a joint structure of a concrete-filled steel tubular column and an H-shaped cross-section beam as shown in (a) and (b). In the fifth embodiment, since the resistance force due to the adhesion effect of the anchor portion and the concrete by the rib 21 of the head tightening high-strength bolt 22 is applied to the joint portion of the steel pipe column 1 via the head tightening high-strength bolt 22, Although the effect is slightly inferior to the cases of Examples 1 to 3 using the anchor plate, it is possible to improve the joint performance (rigidity, proof stress) against the compressive force and the tensile force at this joint as compared with the fourth embodiment. is there. Further, since the rib 21 forming portion is used as the anchor portion without using the anchor plate, the structure is simpler than in the first to third embodiments, and the processing and construction burden can be reduced. Other effects are almost the same as those of the first to fourth embodiments.

The present invention is not limited to the contents of the above embodiment. For example, in each of the examples, the invention was applied to the joining of a rectangular or circular steel pipe column and a T-shaped joint metal, but
It can also be applied to the bonding of shape-bonded metal parts. Also, the head and shaft of high-strength head bolts, shafts, anchor plates that form anchors, male screws, rib shapes and arrangements, methods of fixing nuts and washers inside steel pipe columns, fixing means, and construction of joints. The procedure and the like may be changed within the scope of satisfying the above claims, depending on the object to be joined, the arrangement of the joint, the required joint performance, and the like.

[0046]

According to the present invention, a nut (and a washer) lightly joined to an anchor plate is fixed to the inside of a rectangular or circular steel pipe column in advance, and the steel pipe column and the bolt hole of the joined metal product which are in contact with each other, Insert a head tightening high-strength bolt that can form an anchor on the inside of the steel pipe pillar from the outside, and fasten it with a nut on the inside of the steel pipe pillar to secure the space between the head of the head tightening high-strength bolt and the nut. While fastening the steel pipe column and the joint metal with, and burying the anchor part formed on the tip side in the concrete that is filled and solidified inside the steel pipe column, the resistance of the filled concrete is tightened with a high head bolt. It is possible to improve the joint performance (rigidity and proof strength) of the joint against the compressive force and the tensile force at the joint by acting on the joint of the steel pipe column via. In addition, since the nut is fixed to the inside of the steel pipe column and the metal fitting for the steel pipe column is tightened with a head, the nut is inserted from the outside into the bolt hole and screwed and fastened with the nut. It is possible to arbitrarily decide the mounting order of the upper and lower joined metal parts at the site, and when attaching the H-shaped cross-section beams to the upper and lower joined metal parts, it is possible to avoid interference between the H-shaped cross-section beam and the bonded metal parts, The workability can be improved. Further, basically, since the joining structure does not employ welding joining, the processing load can be reduced.

[Brief description of drawings]

FIG. 1A is a plan cross-sectional explanatory view showing a state where joining is completed in an example of a high-strength bolt joining structure of a prismatic concrete-filled steel pipe column and a T-shaped joining metal article according to Embodiment 1 of the present invention,
(B) figure is front sectional explanatory drawing of (a) figure.

FIG. 2 (a) is a plan cross-sectional explanatory view showing a state in which joining is completed in a high-strength bolt joining structure example of a circular concrete-filled steel pipe column and a T-shaped joining metal article according to Embodiment 1 of the present invention,
(B) figure is front sectional explanatory drawing of (a) figure.

FIG. 3 (a) is a partial side cross-sectional explanatory view of an example of a washer, a nut, and an anchor plate fixed to the head tightening high-strength bolt and the steel pipe column used in the first embodiment of the present invention, FIG. 6B is an explanatory view of the head tightening high-strength bolt in FIG.

FIG. 4 (a) is a partial side cross-sectional explanatory view showing a joining process using the head tightening high-strength bolt of FIG. 3, and FIG.
FIG. 6A is a partial side cross-sectional explanatory view showing a state where joining is completed through the state of FIG.

5A to 5C are front explanatory views showing an example of the shape of an anchor plate forming an anchor portion in a head-fastening high-strength bolt of the present invention.

FIG. 6 is a partial side view showing a washer, a nut, an anchor plate and an example of a fixing means fixed to the inside of the steel pipe column in Embodiment 1 of the present invention, and FIG. 6 (a) shows a case of adhesion. ,
The figure (b) shows the case by brazing.

FIG. 7 is a partial side cross-sectional explanatory view showing an example of a method of fixing a square or circular steel pipe column by two seam welding used in Example 1, and a washer, a nut, and an anchor plate to the inside thereof, FIG.
The figure is a front explanatory view showing a state before two-seam welding in the case of a square steel pipe column, (b) is a front explanatory diagram showing a state after two-seam welding, and (c) is a circular steel pipe column. The front explanatory view showing the state before the 2 seam welding in the case of, and the (d) figure is the front explanatory view showing the state after the 2 seam welding.

FIG. 8 (a) is a partial side view of a head tightening high-strength bolt used in the second embodiment of the present invention, a washer fixed to the inside of a steel pipe column, a nut, and an example of an anchor plate. FIG. 7B is a partial side cross-sectional explanatory view showing a joining process using a head tightening high-strength bolt, and FIG. 9C is a partial side cross-sectional explanatory view showing a state where joining is completed after the state shown in FIG. .

FIG. 9 (a) is a partial side view illustrating a head tightening high-strength bolt used in the third embodiment of the present invention, a washer fixed to the inside of a steel pipe column, a nut, and an example of an anchor plate, FIG. 7B is a partial side cross-sectional explanatory view showing a joining process using a head tightening high-strength bolt, and FIG. 9C is a partial side cross-sectional explanatory view showing a state where joining is completed after the state shown in FIG. .

FIG. 10 (a) is a plan cross-sectional explanatory view showing a state where joining is completed in an example of a high-strength bolt joint structure of a prismatic concrete-filled steel pipe column and a T-shaped joint metal according to Embodiment 4 of the present invention, ( FIG. 7B is a front cross-sectional explanatory view of FIG.

FIG. 11 (a) is a plan cross-sectional explanatory view showing a state where joining is completed in an example of a high-strength bolt joining structure of a circular concrete-filled steel pipe column and a T-shaped joining metal article according to Embodiment 4 of the present invention, FIG. 7B is a front cross-sectional explanatory view of FIG.

FIG. 12 (a) is a washer fixed to the inside of a high-strength head-fastening bolt and a steel pipe column used in Embodiment 4 of the present invention,
Partial side surface explanatory drawing of an example of a nut, (b) Drawing is a partial side sectional explanatory view showing the state where joining was completed.

FIG. 13 (a) is a plan cross-sectional explanatory view showing a state where joining is completed in an example of a high-strength bolt joining structure of a prismatic concrete-filled steel pipe column and a T-shaped joining metal article according to Embodiment 5 of the present invention, FIG. 7B is a front cross-sectional explanatory view of FIG.

FIG. 14 (a) is a plan cross-sectional explanatory view showing a state where joining is completed in an example of a high-strength bolt joining structure of a circular concrete-filled steel pipe column and a T-shaped joining metal article according to Embodiment 5 of the present invention, FIG. 7B is a front cross-sectional explanatory view of FIG.

FIG. 15 (a) is a washer fixed to the inside of a high-strength head-fastening bolt and a steel pipe column used in Embodiment 5 of the present invention,
Partial side surface explanatory drawing of an example of a nut, (b) Drawing is a partial side sectional explanatory view showing the state where joining was completed.

FIG. 16 is a three-dimensional explanatory view showing an example of a high-strength bolt joint structure of a square steel tube column and an H-shaped cross-section beam using a conventional T-joint metal fitting and a high-strength bolt.

FIG. 17 (a) is a plan cross-sectional explanatory view showing an example of a high-strength bolt joint structure of a concrete-filled rectangular steel tube column and an H-shaped steel beam using a conventional T-joint metal fitting and high-strength bolts; The figure is a front cross-sectional explanatory view of FIG.

[Fig. 18] Another conventional concrete-filled rectangular steel tubular column and H
Plane explanatory view showing an example of a joint structure by welding of shaped steel beams,
(B) figure is front sectional explanatory drawing of (a) figure.

FIG. 19 is an explanatory plan view showing an example of a joint structure by welding a concrete-filled rectangular steel tube column and an H-shaped steel beam using a conventional diaphragm and a stud inside the steel tube.

[Explanation of symbols]

1 Steel Pipe Column 1p Bolt Hole 2a Upper T-Shaped Joint 2b Lower T-Shaped Joint 2p Bolt Hole 2f Vertical Plate 2u Horizontal Plate 3 High Strength Bolt 4 H-Shaped Beam 4a Upper Flange 4b Lower Flange 5 High Strength Bolt 6 Concrete 7 Vertical rib (anchor) 8 Diaphragm 9 Stud (anchor) 12, 12 ', 12 "Head tightening high-strength bolt 12a Head 12b, 12
c, 12d Shaft part 12p Pintail 12s Male screw 13, 13 ', 13 ", 13a, 13b Anchor plate 13s Female screw 14 Nut 15 Washer 16 Washer 17 Stopper plate 19s Male screw (for anchor plate) 20s Female screw 21 Rib 22 Head tightening high force Bolt 22a Head 22b Shaft 22s Male screw 22p Pintail Ca, Cb Channel material Cc, Cd Semi-circular material Cp Bolt hole ba Strong adhesion bb Light adhesion sa, sb Brazing w Welding

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Shinichi Sawazumi             20-1 Shintomi, Futtsu-shi, Chiba Nippon Steel shares             Company Technology Development Division F-term (reference) 2E125 AA04 AA14 AB01 AB12 AB13                       AC01 AC15 AC16 AG03 AG04                       AG12 AG32 AG36 AG41 AG43                       AG57 BB09 BB12 BB22 BB32                       BB37 BD01 BE02 BE06 BE08                       BF04 CA05 CA14 EA33

Claims (14)

[Claims] 1. In a high-strength bolt joint structure of a square or circular concrete-filled steel pipe column and an H-shaped cross-section beam using a joint metal, a nut in which an anchor plate having a female screw is lightly joined in advance to the inside of the steel pipe column. Is fixed, insert a high-strength bolt that tightens the head into the bolt hole from the outer surface of the metal fitting that abuts the outer surface of the steel pipe column, and then attach the male screw to the inner side of the steel pipe column. Screwed into a female screw,
By tightening the end of the male screw part to the anchor plate and further tightening, the anchor plate is peeled off from the nut and the anchor part is formed with a certain distance from the head nut. It is characterized in that the steel pipe column and the joint metal are fastened between the inner side nut and the anchor part and nut of the head tightening high-strength bolt are buried in the solidified concrete filled inside the steel pipe column. High-strength bolted structure of concrete-filled steel pipe columns and H-shaped cross-section beams. 2. In a high-strength bolt joint structure of a rectangular or circular concrete-filled steel pipe column and an H-shaped cross-section beam using a joint metal, a nut (and a washer) is preliminarily provided inside the steel pipe column.
Is fixed, and from the outer surface of the metal fitting that abuts the outer surface of this steel pipe column, a bolt hole has a male screw and an anchor part consisting of a male screw or a ribbed shaft portion is formed on the tip side. Insert the high-strength bolt and screw the male screw into the nut that is previously fixed to the inner side of the steel pipe column to fasten it, so that the head between the head of the high-strength bolt and the nut inside the steel pipe column is tightened. A concrete-filled steel pipe column and an H-shaped cross-section beam, characterized in that the steel pipe column and the joint metal are fastened with each other, and the anchor part of the head-fastening high-strength bolt is buried in concrete that is filled and solidified inside the steel pipe column. High strength bolt joint structure. 3. The concrete-filled steel pipe column according to claim 1 or 2, wherein the nut (and washer) is fixed to the steel pipe column by adhesion or brazing. Power bolt joint structure. 4. The high-strength bolted joint structure for a concrete-filled steel pipe column and an H-shaped cross-section beam according to claim 1, wherein the anchor plate has a fastening portion with a male screw of a head-fastening high-strength bolt. . 5. The high-strength bolt joint structure of a concrete-filled steel pipe column and an H-shaped cross-section beam according to claim 1, wherein the light joint means of the anchor plate to the nut is adhesion or brazing. 6. The concrete-filled steel pipe according to claim 1, wherein the anchor plate of the head-fastening high-strength bolt has a diameter larger than that of the shaft portion. High-strength bolt joint structure of column and H-shaped cross-section beam. 7. The head-tightening high-strength bolt has a pin tail for introducing torque to the head, and a polygonal washer capable of giving a tightening torque with a larger diameter than the head is inserted into the seating surface of the head. -The high-strength bolt joint structure of a concrete-filled steel pipe column and an H-shaped cross-section beam according to any one of claims 1 to 6, which is abutted. 8. A head portion, a shaft portion having a male screw screwed with a nut and a male screw screwed with a female screw of an anchor plate, and a washer which is inserted into the shaft portion and abuts on a seating surface of the head portion. High-strength anchor bolt that tightens the head. 9. The fastening and fixing portion of the anchor plate is formed on the anchor plate by making the diameter of the male screw screwed with the nut and the diameter of the male screw screwed with the female screw of the anchor plate the same so as to be continuous. The head-fastening high-strength anchor bolt according to claim 8. 10. A diameter step portion is formed by making a diameter of a male screw threaded on a female thread of an anchor plate smaller than a diameter of a male thread threadedly engaged with a nut, and the anchor plate is fastened at the step portion of this diameter. The head tightening high-strength anchor bolt according to claim 8, wherein 11. A head portion, a shaft portion including a male screw portion screwed with a nut and a male screw forming portion or a rib forming portion serving as an anchor portion, and a washer which is inserted into the shaft portion and abuts against a seat surface of the head portion. Head tightening high-strength anchor bolt characterized by: 12. A washer having a pin-tail for introducing torque, which is inserted through the shaft portion and abuts against a seat surface of the head, is a polygonal washer having a larger diameter than the head and capable of giving a tightening torque. The head tightening anchor bolt according to any one of claims 8 to 11. 13. Half of a pair of channel members or circular steel pipe
A method of installing a nut inside a steel pipe column obtained by seam-welding a semi-circular material consisting of 2 bolts, in which bolt holes are pre-drilled at predetermined positions of a pair of groove-shaped members before 2 seam welding and fixed to the nut. Characterized in that the washer is fixed by abutting against the inner surface of the channel or semi-circular member so that the center of the washer coincides with the center of the bolt hole, and a pair of the channel or semi-circular member is welded by two seams. How to install a nut inside a steel pipe column. 14. The nut is formed by lightly joining an anchor plate having a female screw hole.
The nut installation method inside the steel pipe column described in.