JP2007177403A - Structure for tension-joining concrete-filled square steel-pipe column and beam together by using high tension bolt - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure for tension-joining a concrete-filled square steel-pipe column and a beam together by using a high tension bolt, which employs a joint metal and the high tension bolt, and which can raise the highest proof stress of a joint by efficiently increasing the rigidity and tensile proof stress of the joint through the use of a simple structure. <P>SOLUTION: In the structure for tension-joining the concrete-filled square steel-pipe column and the beam together by using the high tension bolt 3, both side parts of the joint metal for joining the beam 4 to the square steel-pipe column 1 are tension-joined to a part near a corner part of the column 1 by using the high tension bolt 3; tension resisting and reinforcing members (a through-bolt 5 and the high tension bolt with an anchor function) with a shank for being embedded in concrete 6 inside the column 1 are inserted/fastened into the area, between the high tension bolt 3 and a tension joint, of the joint metal; and the concrete 6 is filled into/solidified in the column 1. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention mainly uses a high-strength bolt tension joint to a concrete-filled rectangular steel pipe column constituting a building steel structure, for example, a beam such as an H-shaped steel beam via a joint metal such as a T-shaped metal or end plate. It is related to high strength bolt tension joint structure of concrete filled square steel pipe column and beam.

2. Description of the Related Art Conventionally, in the field of building steel structures, for example, a through diaphragm type joint structure is known as a pillar-beam joint structure for square steel pipe columns and H-shaped steel beams. In this diaphragm type joint structure, in order to install the diaphragm, the steel pipe column is divided once, the diaphragm is inserted, and then welded and joined again, and the beam and the diaphragm are also welded. The manufacturing process is complicated. Also, welding of the beam and the diaphragm is often on-site welding, which is easily affected by wind and rain, and it is difficult to ensure a stable quality of the joint.
On the other hand, in the present application, the processing of the steel pipe column is completed only by drilling through a bolt or a PC steel rod, so that the processing degree of the column is greatly simplified. In addition, when an end plate is used as a metal joint, welding is used for joining to a beam. Since this welding can be performed in a factory with a working environment, stable quality can be ensured. Moreover, in the field, since the welding which requires the skill is not used and the bolting that is easy to construct is used, stable quality can be easily ensured as the whole joint.

Patent Document 1 discloses a tension-bolt-type column beam joint intended for steel structure as an alternative to eliminate welding work. In this tension bolt type, the tensile force from the beam flange is transmitted to the high strength bolt by the bending resistance of the end plate, and the stress is transmitted to the side surface of the steel pipe by the resistance in the axial direction of the high strength bolt and the bending resistance of the front surface of the steel pipe. It is a joining type.
Therefore, the yield strength of the joint is determined by the smaller value of any of the tensile strength in the axial direction of the high-strength bolt, the out-of-plane resistance of the steel pipe, and the out-of-plane resistance of the end plate. Among these, the out-of-plane proof stress (resistance force) of the steel pipe increases as the distance between the high-strength bolt and the side surface of the steel pipe becomes smaller, and as a method to efficiently improve the proof strength of the joint (out-of-plane proof strength of the steel pipe) Document 1 discloses a tensile bolt joint in which high-strength bolts are arranged on the side of the steel pipe as much as possible.
However, there is a limit to the stress that can be transmitted with high-strength bolt tensile joints only. When the beam has a large cross section or when the steel pipe column is made of CFT and the steel pipe thickness is reduced, sufficient joint strength is ensured. There is a problem that it becomes impossible.
On the other hand, in the present application, the tensile high-strength bolt is arranged close to the side surface of the steel pipe (part close to the corner) to efficiently improve the steel pipe surface strength and to provide sufficient joining by separately providing a tensile resistance auxiliary material. The part yield strength can be secured.

Patent Document 2 discloses an anchor bolt type beam-column joint intended for CFT construction as an alternative for eliminating complicated welding operations. This is to efficiently use the filled concrete to transmit the tensile force from the beam flange to the steel pipe column, but with the anchor metal alone there is a limit to the stress that can be transmitted, and the beam has a large cross section However, there is a problem that sufficient joint strength cannot be ensured.
On the other hand, in the present application, the concrete with the anchor function is used efficiently, and the tensile high-strength bolt is arranged close to the side surface of the steel pipe to efficiently improve the outer strength of the steel pipe surface. By using these both in combination, sufficient joint strength can be ensured.

Patent Document 3 discloses a through-bolt-type column beam joint for steel structure as an alternative to eliminate complicated welding work. However, in the through-bolt type of Patent Document 3, “a plate-like joint fitting is separately fixed with bolts along the upper and lower flanges of the end of the H-shaped steel beam (claim 1)”. Thus, a special joining metal fitting is required and differs greatly in convenience from the present application. In addition, there is a limit to the stress that can be transmitted with only through bolts, and there remains a problem that when the beam has a large cross section, it becomes impossible to ensure sufficient joint strength.
On the other hand, in the present application, through bolts are used and tensile high strength bolts are arranged close to the side surface of the steel pipe to effectively improve the steel pipe outer surface proof stress. Thus, it is sufficient to use both of these in combination. The joint strength is secured.
In Patent Document 3, a high-strength bolt is used for joining the web. However, this is “as a shearing force resister, a one-side bolt 8 is separately provided in FIG. Paragraph 0008, line 51) ”is for transmitting the shearing force of the beam, and the tensile high-strength bolt of the present application arranged to transmit the tensile force of the beam flange is its purpose and effect. Are completely different.

Patent Document 4 discloses a through-bolt-type column beam joint for steel structure as an alternative to eliminate complicated welding work. However, there is a limit to the stress that can be transmitted with only through bolts, and when the beam has a large cross section, there remains a problem that sufficient joint strength cannot be ensured.
On the other hand, in the present application, through bolts are used and tensile high strength bolts are arranged close to the side surface of the steel pipe to effectively improve the steel pipe outer surface proof stress. Thus, it is sufficient to use both of these in combination. Bonding strength can be ensured.
In Patent Document 4, high-strength bolts are used for joining the webs, but this is described as “Shearing force resisters, which are dealt with by separately providing one-side bolts 8 in FIG. Paragraph 0007, line 44) ”is for transmitting the shearing force of the beam, and the tensile high-strength bolt of the present application arranged to transmit the tensile force of the beam flange is its purpose and effect. Are completely different.

Patent Document 5 discloses a column beam joint portion using a penetrating hardware as an alternative to eliminate complicated welding work. However, Patent Document 5 discloses that “a through-metal that horizontally penetrates the joint portion of the steel column and a joint metal that joins the through-metal and the beam flange, the through-metal is a hardware main body located inside the steel column, The joint hardware consists of a nut part screwed into the male screw member and a joint part welded to the joint end of the beam flange, and the joint surface of this joint part is screwed It requires a complicated through metal fitting and joint metal fitting as described above (claim 1), which can be welded to the beam flange even if it is rotated by the In addition, there is a limit to the stress that can be transmitted only with the penetrating hardware, and when the beam has a large cross section, there remains a problem that sufficient joint strength cannot be secured.
On the other hand, in the present application, through bolts are used and tensile high strength bolts are arranged close to the side surface of the steel pipe to effectively improve the steel pipe outer surface proof stress. Thus, it is sufficient to use both of these in combination. Bonding strength can be ensured.
JP 7-224461 A JP 2003-343008 A JP-A-9-217421 JP-A-9-151539 JP 2004-204526 A

  The present invention advantageously solves the above-mentioned conventional problems in a high strength bolt tensile joint structure of a concrete-filled rectangular steel pipe column and a beam using a joint hardware and a high strength bolt. It is an object of the present invention to provide a joint structure that can efficiently improve rigidity and tensile strength and improve the maximum yield strength as a joint.

The present invention has the following (1) to (6) in order to advantageously solve the above problems.
(1) Claim 1 is a concrete-filled rectangular steel pipe column and beam high-strength bolt tension joint structure using a joint metal and a high strength bolt. Both sides of the joint hardware for joining the beam to the square steel pipe column High-strength bolts are joined with high-strength bolts placed outside the tensile resistance reinforcement near the corners of the steel, and buried in the concrete inside the square steel pipe column in the region between the high-strength bolt tensile joints of this joint hardware. Insert and fasten a tensile resistance reinforcement material (referred to as a through bolt or a high strength bolt with an anchor function, hereinafter referred to as “tensile resistance reinforcement material”) having a shaft portion to be filled and solidify the concrete inside the square steel pipe column. This is a high-strength bolt tension joint structure of concrete filled square steel pipe columns and beams.
(2) Claim 2 is a through-bolt used in claim 1, wherein the tensile resistance reinforcing material is made of a steel rod having a fastening portion at an end portion and is used with initial tension applied or without initial tension applied. High strength of concrete-filled rectangular steel pipe columns and beams, characterized in that both ends protrude to the outside of the opposite joint hardware joined to the square steel pipe columns and fastened simultaneously to the opposing joint hardware Bolt tension joint structure.
(3) A third aspect of the present invention is the method according to the second aspect, wherein the through-bolt is formed of a deformed steel bar having a fastening portion at an end portion and a thread-like portion or a node-like portion at a shaft portion without applying initial tension. A high-strength bolt tension joint structure of a concrete-filled steel pipe column and an H-shaped steel beam, which is characterized by being used.

(4) A fourth aspect of the present invention is the high-strength bolt tension joint structure of a concrete-filled steel pipe column and a beam according to the first aspect, wherein the tensile resistance reinforcing material is a bolt with an anchor function at a shaft portion.
(5) Claim 5 is the flange position and joint hardware position of the beam arranged orthogonally when the tensile resistance reinforcing material is arranged orthogonally to join the beam in the orthogonal direction in any one of claims 2 to 4. Is a high-strength bolt tension joint structure of a concrete-filled rectangular steel pipe column and a beam, characterized in that they are arranged shifted in the vertical direction to avoid mutual interference between the tensile resistance reinforcing members arranged orthogonally.
(6) A sixth aspect of the present invention is the method according to any one of the second to fourth aspects, wherein when the tensile resistance reinforcing material is disposed orthogonally so as to join the beams in the orthogonal direction, the tensile resistance reinforcing material position to be orthogonally disposed is the vertical direction. This is a concrete-filled square steel pipe column and beam high-strength bolt tensile joint structure characterized in that the mutual interference of the tensile resistance reinforcement members arranged at right angles is avoided.

In the present invention, the high-strength bolt tensile joint is performed on both side portions of the joint metal to be joined to the beam at a portion near the corner of the square steel pipe column, and at the same time, the region between the high-strength bolt tensile joints is formed inside the square steel pipe column. By adopting a simple joint structure that inserts and fastens a tensile resistance reinforcement material with a shaft part that is buried in filled concrete, the joint strength and strength are increased by accumulating the strength of the tensile resistance reinforcement material and the strength outside the steel pipe surface. It becomes possible to improve stably (Claim 1).
When through bolts made of PC steel rods are used as tensile resistance reinforcements, joining hardware is also joined to the opposing surface of a square steel pipe column, or flat plate (when a beam is not joined to the opposing surface of a steel pipe column) Can be fastened at the same time by inserting and tightening through bolts on the outer side. In this case, by applying initial tension to the through bolt to improve rigidity and proof stress, or by using a deformed PC steel bar having a screw part or a node part in the shaft part, the adhesion performance with concrete is increased, It is possible to stably impart sufficient rigidity and proof stress to the through bolt. (Claims 2 and 3).
When a bolt with an anchor function is used as a tensile resistance reinforcement, and when the anchor part larger than the shaft part diameter is formed on the shaft part inside the square steel pipe column, the joint part is out of reach This forming operation can be carried out before forming the square steel pipe column, or by adopting a special construction method after forming the square steel pipe column, so that the weight per one can be reduced, and the on-site workability is further improved. (Claim 4).
When the tensile resistance reinforcement material is arranged orthogonally to join the beams in the orthogonal direction, the flange position and the joint hardware position of the orthogonally arranged beams are shifted in the vertical direction, or the tensile resistance reinforcement material position is moved up and down. It is possible to easily avoid the mutual interference of the tensile resistance reinforcing members arranged in a shifted direction and orthogonally arranged. It produces the effects such as. (Claims 5 and 6)

The present invention is a joint-filled rectangular steel pipe column and beam (mainly an H-shaped cross-section beam) using joint hardware (mainly T-shaped hardware and end plate, hereinafter referred to as “joint hardware”) and tensile high-strength bolts. In a high-strength bolt tension joint structure including a groove shape and other shapes (hereinafter referred to as “beam”), a metal fitting for joining the beam and a square steel pipe column (mainly obtained by 1 to 4 seam welding). This is a square cross-section column, which is hereinafter referred to as a “square steel tube column”) and is applied to high-strength bolt tension joining.
In the present invention, the high-strength bolt tensile joint of both side portions of the joint hardware for joining the beam to the square steel pipe column at a portion near the corner of the square steel pipe pillar, and the region between the high-strength bolt tensile joint portions of this joint hardware Insert and fasten a tensile resistance reinforcing material consisting of a through bolt or anchor function bolt that has a shaft part embedded in the concrete inside the square steel pipe column (more preferably, the area from the center of the width of the square steel pipe column). This is a high strength bolt tensile joint structure of concrete filled square steel pipe columns and beams, in which concrete is filled and solidified inside the square steel pipe columns, and the joint rigidity is increased by adding the strength of the tensile resistance reinforcement and the out-of-plane strength of the steel pipe. It improves the yield strength stably.
The tensile resistance reinforcement is effective when inserted and tightened in the region directly above and below the beam flange. However, if the tensile force acting on the beam flange is small, either region is emphasized. Also consider.

In this high-strength bolt tension joint structure, a high-strength hexagon bolt for friction joining specified in JIS B 1186-1995 is used as a tensile high-strength bolt that joins both side portions of a joint metal at a portion close to the corner of a square steel pipe column.・ In addition to the set of hexagonal nuts and plain washers, as shown in Fig. 1, it has a male screw to screw the nut into the shaft, and has a tightening torque introduction mechanism (pin tail), which cooperates with the nut and pin tail, It has a well-known Torcia-type high-strength bolt that is tightened while controlling the tightening torque, or a male thread that engages a nut with the shaft, and has a tightening torque introduction mechanism (pin tail) on the head. A well-known head-clamped torcia-type high-strength bolt that can be tightened while cooperating a square washer interposed on the surface and managing the tightening torque can be used.
In the present invention, these tensile high-strength bolts are used to tension-join a metal fitting to a square steel pipe column having a closed cross section, so that a nut is fixed to the inside of the square steel pipe column, or a bolt hole is formed from the inside of the square steel pipe column to the bolt hole. Work such as inserting force bolts is required.
When this work is performed as a rectangular steel pipe column, if the joint is in an unreachable position from outside, a special device is used. You can also go there. The use of other high-strength bolts such as a well-known one-side bolt that can be tightened on the outside after forming a square steel pipe column by omitting such work can be considered.

In addition, as the tensile resistance reinforcing material used in the present invention, the following can be used.
[Through bolt]
Here, the through bolt means a joint metal joined to one surface of a square steel pipe column and a joint metal joined to the other surface or an abutting flat plate (used when the beam is not joined to the other surface). It has the length which the edge part which becomes a fastening part protrudes on the outer side, and a diameter says a diameter smaller than a bolt hole. This through bolt does not use a nut on the inside of the steel pipe column. Basically, the bolt is inserted into the bolt hole from one side of the joint hardware, and the fastening part is joined to the joint hardware on one side and the other joint hardware. Alternatively, it is fastened simultaneously on the outside of one joint metal and the other joint metal (or flat plate) in a state of protruding from the flat plate. As this through bolt, for example, the following is used.
For example,
(1) A threaded portion is formed at both ends of a PC steel rod, a fastening portion can be formed with a nut, and a shaft portion is buried in filled concrete inside a square steel pipe column. Even if the shaft portion has a circular cross section, suitable rigidity and proof stress can be obtained. However, by introducing initial tension, the rigidity and proof stress can be enhanced and the through bolt effect can be further enhanced.
When introducing the initial tension, it is effective to provide a tension introducing mechanism (pin tail) at the tip so that the tension can be managed. In addition, from the viewpoint of preventing deformation of the steel pipe, the introduction of tension is usually performed after the concrete is filled and solidified, but may be implemented before filling the concrete by providing a diaphragm in the steel pipe to prevent the deformation of the steel pipe. .
(2) A threaded part is formed at both ends of a deformed PC steel bar (which can be a deformed bar), and a threaded part can be formed with a nut. The shaft portion is buried in the filled concrete inside the square steel pipe column.
In the case of this deformed PC steel bar, the adhesion performance with concrete can be strengthened, so that rigidity and proof stress can be strengthened without introducing initial tension, and the through-bolt effect can be secured stably.
Introducing an initial tension can also be considered. In this case, it is effective to provide a tension introducing mechanism (pin tail) at the tip so that the tension can be managed.

[Bolt with anchor function]
A bolt with an anchor function is used by fastening with a metal fitting unit joined to a square steel pipe column. It has a threaded part at the end of a steel bar and can be fastened with a nut. Yes, the shaft portion in which the anchor portion that enhances the adhesion performance of the filling inside the square steel pipe column to the concrete is formed is buried in the concrete. This bolt with an anchor function basically does not use a nut on the inner side of the steel pipe column, but does not exclude the use.
For example, (1) A threaded part can be formed at one end of a PC steel rod and a fastening part can be formed with a nut. The shaft part embedded in the filled concrete inside the square steel pipe column is larger than the shaft diameter. It has a hook-shaped anchor part with a diameter.
(2) PC deformed steel bar (or deformed steel bar is acceptable) A threaded part can be formed at one end and a fastening part can be formed with a nut, and the shaft part embedded in the filled concrete inside the square steel pipe column It has a concavo-convex portion having a smaller diameter than a bolt hole formed by a screw-like portion or a node-like portion. In this case, as in (1), it can be considered that a hook-shaped anchor portion having a diameter larger than the shaft diameter is formed on the shaft portion.

When connecting through bolts orthogonally to join the metal fittings to the adjacent surfaces of the square steel pipe columns, the beam flange positions and the metal fitting positions of the beams arranged orthogonally are shifted in the vertical direction, and the through holes arranged orthogonally are arranged. Mutual interference of the bolts can be avoided.
Further, when the through bolts are arranged orthogonally so as to join the beams in the orthogonal direction, the through bolt positions arranged orthogonally can be shifted in the vertical direction to avoid mutual interference of the orthogonally arranged through bolts. .

When the beam is an H-shaped steel beam and a T-shaped metal fixture is used as the joint hardware, the flange of the H-shaped steel beam is joined to the horizontal portion (web) of the T-shaped hardware. A pair of upper and lower flanges are placed on the top and bottom, and high-strength bolts and tensile resistance reinforcements such as through bolts and bolts with anchoring function are provided on the upper surface of the upper and lower flanges of the H-shaped steel beam. It is inserted and fastened to T-shaped hardware parts corresponding to the side region and the lower surface side region, respectively.
In the case of using an end plate as the joint metal, the end face of the H-shaped steel beam is butted and welded to one end plate. Tensile high strength bolts and tensile resistance reinforcements such as through bolts and anchor function bolts are As in the case of the T-shaped hardware, it is inserted and fastened to T-shaped hardware parts corresponding to the upper surface side region and the lower surface side region of the upper and lower flanges of the H-shaped steel beam, respectively.

Embodiment 1 of the present invention will be described below based on FIGS. 1, 2, 3, and 4. FIG.
The first embodiment is a joint structure of a concrete-filled square steel pipe column (CFT column) 1 and an H-shaped cross-section beam 4 using a pair of upper and lower T-shaped hardware 2 ₁ , 2 ₂ and a tensile high-strength bolt 3 that are joint hardware. , T-shaped hardware 2 ₁ , 2 ₂ and square steel pipe column 1 are applied when high-strength bolts are joined by tension.
The H-shaped cross-section beam 4 is usually attached to the side surfaces 1 to 4 of the square steel pipe column 1, but here, in FIGS. 1A, 1 </ b> B, and 1 </ b> C, which are state diagrams after concrete filling. As shown, in the case where the H-shaped steel beam 4 is attached to the two opposite side surfaces (A side surface and B side surface) of the square steel pipe column 1 via the T-shaped hardware 2 ₁ , 2 ₂ , the concrete 6 An example of the joining structure after filling and solidification will be described with reference to partial views. Here, the illustration of the high-strength bolt that joins the T-shaped hardware and the H-shaped steel beam is omitted.

In this first embodiment, a pair of upper and lower T-shaped hardwares 2 ₁ , 2 ₂ for joining the upper and lower flanges 4 a, 4 b of the H-shaped steel beam 4 with high-strength bolts are arranged on two side surfaces (A side surface and The T-shaped metal fittings 2 which are in contact with the two side surfaces of the square steel pipe column 1 and are joined to a portion having a high tensile resistance near the corner of the square steel pipe column 1 with the tensile high strength bolt 3. Between the tensile high-strength bolts 3 in ₁ and 2 ₂ , through-bolts (in this case, formed of PC steel rods) 5, which are tensile resistance reinforcing materials, are penetrated, and both end portions protruded from the opposing T-shaped metal fittings. Fasten at the same time.
As a result, the shaft portion is buried in the concrete 6 filled and solidified in the square steel pipe column 1, and the strength of the through bolt 5 and the strength outside the surface of the steel pipe are accumulated, and the rigidity against the tensile force acting from the H-shaped steel beam 4 is increased. Strength is strengthened and joint strength is strengthened.
The through-bolt 5 in the first embodiment is shifted in the height direction from the tensile high-strength bolt 3 in an inner region between the tensile high-strength bolt 3 and the upper flange 4a or 4b of the H-shaped steel beam 4. Although it arrange | positions, even if it arrange | positions side by side between the tension | tensile_strength high volt | bolt 3 of both sides, the function as a tensile resistance reinforcement material is fully exhibited.

The pair of upper and lower T-shaped metal pieces 2 ₁ , 2 ₂ used here are obtained by cutting out from, for example, H-shaped steel, and as shown in FIG. It is formed of a flange 2f and a horizontal web 2u that comes into contact with the flange of the H-shaped steel beam 4.
The vertical flange 2f has two bolt holes 2o for the tensile high-strength bolts 3 and two bolt holes 2p for the through bolts 5 to be joined to the square steel pipe column 1, respectively, an upper region and a lower region of the horizontal web 2u. In addition, the horizontal web 2 u is provided with a bolt hole 2 q of a high-strength bolt that is joined to the flange of the H-shaped steel beam 4.
Here, the lower surface of the horizontal web 2u upper T-shaped fittings 2 _1, the upper surface of the upper flange 4a of the H-shaped steel beam 4 abuts, joined by high-strength bolts, the lower T-shaped fittings 2 ₂ horizontal The lower surface of the lower flange 4b of the H-shaped steel beam 4 is brought into contact with the upper surface of the web 2u and joined with a high-strength bolt.

As shown in FIG. 3A, the tensile high-strength bolt 3 has a male screw portion 3s on one side of the shaft portion and a nut 8 inserted through a washer 11 at the end of the head 3h. This is a head-clamped torcia-type high-strength bolt having a pin tail 3p and having a square washer 10 that cooperates with the pin tail 3p when tension is introduced into the seating surface of the head 3h.
This head-clamped torcia-type high-strength bolt 3 is inserted into the bolt hole 2o from the outside of a T-shaped metal piece (2 ₁ , 2 ₂ ) that is in contact with the opposite side surfaces of the square steel pipe column 1. The nut 8 is screwed on the inner side of the column 1 and the introduction tension is controlled by the pin tail 3p on the outer side of the T-shaped metal piece (2 ₁ , 2 ₂ ) and tightened by tightening the head.
Here, as the tension high-strength bolt 3, a head-clamped Torcia-type high-strength bolt is used, but as shown in FIG. 3B, a known Torcia-type high-strength having a pin tail 3p at the tip of the male screw portion 3s. a force bolts 3 _1, is inserted from the inner side of the RHS column 1 to the bolt holes, to manage the introduction tension outside of the T-shaped hardware side can consider also be fastened by a nut 8 tightening.

The through-bolt 5 is formed of a PC steel rod. As shown in FIG. 4 (a), two opposing side surfaces of the square steel pipe column 1 are penetrated and joined to these two side surfaces with a tensile high-strength bolt. In order to be simultaneously fastened to the metal mold, the outer diameter of the square steel pipe column 1 + the thickness of the vertical flange 2f of the T metal mold 2 + (the height of the nut 8 + the thickness of the washer 11) x 2 + α, It has a male screw part 5s which inserts a washer 11 into both ends of the shaft part and screwes a nut 8 into it.
The through bolt 5 is inserted into the bolt hole 2p from the outside of the T-shaped metal piece joined to one side surface of the square steel pipe column 1, and the male screw portions 5s at both ends are joined to the opposite side surfaces of the square steel pipe column 1. It can project to the outside of the T-shaped metal piece, and can be fastened simultaneously by screwing a nut 8 with a washer 11 interposed therebetween.
Here, the through bolt 5 is of a type that does not introduce tension at the time of fastening. For example, as shown in FIG. 4 (b), a pin tail 5 is provided at the tip of the male screw portion 5s, and at the time of fastening. it can be used through bolt 5 ₁ format for performing tensioning. 4 (a) and 4 (b) are formed by forming male screw portions 5s at both ends, but as shown in FIG. 4 (c), the male screw portions 5s are provided at one end portion. formed, to form the head 5t at the other end, you can also consider the use of through bolts 5 ₂ which is to perform the nut 8 at one end side.

A second embodiment of the present invention will be described below with reference to FIGS.
This Example 2 is a joint structure of a concrete-filled square steel pipe column (CFT column) 1 and an H-shaped steel beam 4 using an end plate 12 and a tensile high strength bolt 3 as shown in FIG. This is a case where the end plate 12 to which the shaped steel beam 4 is joined and the square steel pipe column 1 are applied to the high strength bolt tension joining.
In general, the H-shaped steel beam 4 is attached to the side surfaces 1 to 4 of the square steel pipe column 1. Here, as shown in FIGS. 5 (a), (b), and (c), the square steel pipe column 1. In the case where the H-shaped steel beam 4 is attached to the two opposite side surfaces (A side surface and B side surface) via the end plate 12, the example of the joining structure after filling and solidifying the concrete steel 6 to the square steel pipe column 1 is represented by a partial view. explain.
This Example 2 uses the end plate 12 in which the end faces of the H-shaped steel beam 4 are joined by welding as the joint hardware, and introduces initial tension to the through bolt (PC steel rod) used as the tensile resistance reinforcing material. in that using through bolts (PC steel bars) 5 ₁ having a pintail at the tip of the male screw portion 5s, is different from the first embodiment. A description of portions common to the first embodiment will be omitted.

In Example 2, the end plate 12 in which the end faces of the H-shaped steel beam 4 are joined by welding w is brought into contact with two opposite side surfaces (A side surface and B side surface) of the square steel pipe column 1 to The tensile high strength bolt 3 is joined to a portion near the corner portion where the tensile resistance is large, and the tensile resistance is applied to a region in the vicinity of the tensile high strength bolt 3 in the end plate 12 joined to two opposite side surfaces of the square steel pipe column 1. the through bolts 5 ₁ a reinforcement material passed through, simultaneously fastened to both end portions protrude from the outer side of the end plate 12 joined to two opposite sides of the RHS column 1.
Thus, while buried in concrete 6 filled and solidified a shaft portion to RHS Column 1, to accumulate the yield strength and the steel pipe surface outside Strength of through bolts 5 _1, for the tensile force applied from the H-shaped steel beam 4 Strength and strength are strengthened, and joint strength is strengthened.
Incidentally, through-bolts 5 ₁ in the first embodiment, arranged in the region near the tensile high strength bolt 3. More specifically, it is arranged in the inner region between the tensile high strength bolt 3 and the upper flange 4a or 4b of the H-shaped steel beam 4, but it is arranged side by side between the tensile high strength bolts 3 on both sides. However, it fully functions as a tensile resistance reinforcement.

The end plate 12 used here is made of, for example, a thick steel plate. As shown in FIG. 6, the end surface of the H-shaped steel beam 4 is welded and joined, and is a tensile high strength bolt that is joined to the square steel pipe column 1. 3 and the bolt hole 12o of the bolt holes 12p of the through bolt 5 _1, 2 at a time, respectively, the upper flange 4a of the H-shaped steel beam 4 but on symmetrically in the upper and lower regions of the lower flange 4b .
Further, the through bolt 5 _1, which was formed in the PC steel bars, in order to introduce the initial tension, as shown in FIG. 4 (b), those having a pintail 5p on the tip of the male threaded portion 5s, In order to penetrate the two opposite side surfaces of the square steel pipe column 1 and simultaneously fasten to the end plate 12 joined to the two side surfaces by the tensile high-strength bolts 3, at least the outer diameter of the square steel pipe column 1 + the end plate 12 Thickness + (Nut 8 height + Washer 11 thickness) × 2 + α + Pintail 5p length. Insertion nuts 8 are inserted into both ends of the shaft to screw in the nut 8 to control the introduction tension. While tightening.
Incidentally, the through bolt 5 _1, here it was used of the type performing the tensioning when fastened at both ends forms a male thread 5s portion having a pintail 5p only at one end, the other end It is also possible to use a type in which a head is formed and tension is introduced at one end at the time of fastening.
Further, as shown in FIG. 4A and FIG. 4C, a through bolt (5) of a type that does not have a pin tail for introducing tension may be used.

A third embodiment of the present invention will be described below with reference to FIGS.
As in Example 1, Example 3 is a concrete-filled square steel tube column (CFT column) 1 and an H-shaped cross section using a pair of upper and lower T-shaped metal components 2 ₁ and 2 ₂ and tensile high-strength bolts 3, which are joint hardware. In the joint structure of the beam 4, this is applied when the T-shaped hardware 2 ₁ , 2 ₂ and the square steel pipe column 1 are joined by high strength bolt tension joining.
The H-shaped cross-section beam 4 is normally attached to 1 to 4 side surfaces of the square steel pipe column 1, but here, as shown in FIGS. 7 (a), (b), and (c), the square steel tube column 1 is provided. Example of joint structure after filling and solidifying concrete 6 in square steel pipe column 1 when attaching H-shaped steel beam 4 via T-shaped hardware 2 ₁ , 2 ₂ to two opposite side surfaces (A side surface and B side surface) Will be described with reference to a partial view.
Example 3 is different from Example 1 in that a through bolt 13 made of a deformed PC steel rod having a node-like portion at the shaft portion was used as a through bolt used as a tensile resistance reinforcing material. A description of portions common to the first embodiment will be omitted.

In Example 3, a pair of upper and lower T-shaped hardwares 2 ₁ , 2 ₂ for joining the upper and lower flanges 4 a, 4 b of the H-shaped steel beam 4 with high-strength bolts are used as two opposing side surfaces (A side surface and The T-shaped metal fittings 2 which are in contact with the two side surfaces of the square steel pipe column 1 and are joined to a portion having a high tensile resistance near the corner of the square steel pipe column 1 with the tensile high strength bolt 3. Between the tensile high-strength bolts 3 in ₁ and 2 ₂ , through-bolts (here, formed of PC deformed steel bars) 13, which are tensile resistance reinforcing materials, are penetrated and protruded from opposite T-shaped hardware. At the same time.
As a result, the shaft portion is buried in the concrete 6 filled and solidified in the square steel pipe column 1, and the strength of the through bolt 13 and the strength outside the surface of the steel pipe are added to increase the rigidity against the tensile force acting from the H-shaped steel beam 4. Strength is strengthened and joint strength is strengthened.
The through bolt 13 in the third embodiment is shifted in the height direction from the tensile high-strength bolt 3 and is formed in an inner region between the tensile high-strength bolt 3 and the upper flange 4a or 4b of the H-shaped steel beam 4. Although it arrange | positions, even if it arrange | positions side by side between the tension | tensile_strength high volt | bolt 3 of both sides, the function as a tensile resistance reinforcement material is fully exhibited.

The through bolt 13 is formed of a deformed PC steel rod having a node portion 13x at the shaft portion. As shown in FIG. 8 (a), the two opposite side surfaces of the square steel pipe column 1 are penetrated to form the two side surfaces. In order to simultaneously fasten to a T-shaped metal piece joined with a tensile high-strength bolt 3, the outer diameter of the square steel pipe column 1 + the thickness of the vertical flange 2f of the T-shaped metal piece 2 + (the height of the nut 8 + the thickness of the washer 11) It has a length of × 2 + α, and has male screw portions 13 s that are fitted with nuts 8 at both end portions of the shaft portion with the washers 11 interposed therebetween.
The through bolt 13 is inserted into the bolt hole 2p from the outside of the T-shaped metal piece joined to one side surface of the square steel pipe column 1, and the male screw portions 15s at both ends are formed on the two opposite side surfaces of the square steel pipe column 1. It can be made to project to the outside of the joined T-shaped metal parts, and nuts 8 with washers 11 inserted into each can be screwed together and fastened simultaneously.

As the through bolt, a through bolt 13 formed of a deformed PC steel rod having a node portion 13x at the shaft portion was used. However, as shown in FIG. 8B, a modified PC having a screw-like portion 13z at the shaft portion. it can be used through bolt 13 ₁ formed in the steel bar. The tie rods 13, 13 _1, although the of the type that does not perform tensioning during fastened, also be used in the form of a through bolt for performing tensioning when fastened provided pintail example the tip of the male thread portion 13s it can.
In addition, in the case of any type of through bolt, a through bolt is used in which a male screw portion is formed at one end and a head is formed at the other end so that the nut is performed on one end side. Can also be considered.

A fourth embodiment of the present invention will be described below with reference to FIGS.
This Example 4 shows a T-shaped hardware in a joint structure of a concrete-filled square steel pipe column (CFT column) 1 and an H-shaped cross-section beam 4 using a pair of upper and lower T-shaped hardware 2 ₁ , 2 ₂ and a tensile high strength bolt 3. This is applied when 2 ₁ , 2 ₂ and the steel pipe column 1 are subjected to high strength bolt tensile joining.
The H-shaped cross-section beam 4 is normally attached to the side surfaces 1 to 4 of the square steel pipe column 1, but here, as shown in FIGS. 9 (a), (b), and (c), the square steel pipe column 1 In the case where the H-shaped cross-section beam 4 is attached to the two opposite side surfaces, an example of a joint structure after filling and solidifying the concrete 6 to the square steel pipe column 1 will be described with reference to a partial view.
The fourth embodiment is the same as the first and third embodiments in that the pair of upper and lower T-shaped metal pieces 2 ₁ , 2 ₂ are joined by the tensile high-strength bolt 3, and a short anchor is used as the tensile resistance reinforcing material. This is different from the first and third embodiments in that a high strength bolt 14 with a function is used. Descriptions of parts common to the first and third embodiments are omitted.

A pair of upper and lower T-shaped hardwares 2 ₁ , 2 ₂ that join the upper and lower flanges 4 a, 4 b of the H-shaped steel beam 4 with high-strength bolts are brought into contact with two opposite side surfaces (A side surface and B side surface) of the square steel pipe column 1. In addition, the tensile high-strength bolts 3 are joined to portions having a large tensile resistance near the corners of the square steel pipe columns 1 and tensiles in the respective T-shaped hardwares 2 ₁ and 2 ₂ joined to two opposite side surfaces of the square steel pipe columns 1. Between the high-strength bolts 3, high-strength bolts 14 with anchor functions, which are tensile resistance reinforcing materials, are inserted and fastened.
As a result, the shaft portion with the anchor function is buried in the concrete 6 filled and solidified in the square steel pipe column 1, and the high strength bolt 14 with anchor function and the out-of-plane strength are added to the H-shaped steel beam 4. The strength and strength against the tensile force acting are strengthened, and the joint strength is strengthened.
The high-strength bolt 14 with an anchor function in this Example 4 is shifted in the height direction from the tensile high-strength bolt 3, and the inner side between the tensile high-strength bolt 3 and the upper flange 4 a or 4 b of the H-shaped steel beam 4. Although it arrange | positions in the area | region, even if it arrange | positions side by side between the tensile high-strength bolts 3 of both sides, the function as a tensile resistance reinforcement material is fully exhibited.

As shown in FIG. 10A, the high-strength bolt 14 with an anchor function used here is composed of a PC deformed steel rod having a threaded portion 14z, and a washer 11 is inserted at one end of the shaft portion. 14, which has a male threaded portion 14 s to be screwed into the nut 8, and a hook-shaped anchor plate 15 having a female threaded portion larger than the bolt hole diameter is fastened to the threaded portion 14 z on the other tip side. .
The high-strength bolt 14 with an anchor function is inserted and fastened by fastening the hook-shaped anchor plate 15 and inserting the bolt-shaped anchor plate 15 into the bolt hole from the inside of the square steel pipe column 1 or by inserting the hook-shaped anchor plate 15 into the square steel pipe column 1. The screw-like portion 14z inserted from the outside side is screwed and pressed to the inner side of the desired length of tightening, the hook-shaped anchor plate 15 is peeled off, and the inside of the square steel pipe column 1 is peeled off. It can be performed by adopting a construction method such as a desired position.
When the threaded portion 14z of the shaft portion of the high-strength bolt 14 with an anchor function and the hook-shaped anchor plate 15 are buried in the concrete 6 filled and solidified in the square steel pipe column 1, an anchor effect is exerted on the concrete 6. To demonstrate.
As a result, the resistance force of the concrete 6 is applied to the joint portion of the square steel pipe column 1 via the high-strength bolt 14 with an anchor function, and the joint portion performance (rigidity and proof stress) against the compressive force and the tensile force at this joint portion is improved. Can be made.
In addition, although the high strength bolt 14 with an anchor function used here has the screw-shaped part 14z and the hook-shaped anchor board 15, the anchor board 15 was fixed to the PC steel rod which does not have the screw-shaped part 14z, for example. A high-strength bolt with an anchor function or a high-strength bolt having a head as an anchor portion can be inserted into the bolt hole from the inside of the square steel pipe column 1 and fastened on the outside.
Further, as shown in 10 (b), the shank bolt hole diameter than the anchor function high-strength bolts 14 ₁ formed, for example, nodular portion 14x (also acceptable threaded portion 14z) has an outer diameter of the small diameter, the nodes The shape portion 14x can also function as an anchor portion. In this case, the anchor effect is inferior to that of the high-strength bolt 14 with an anchor function shown in FIG. 10A, but construction is easy because it can be easily inserted from the outside.

A fifth embodiment will be described with reference to FIGS. 11 (a) and 11 (b).
In the fifth embodiment, an H-shaped steel beam 4 is attached to _two adjacent side surfaces (here, A side surface and C side surface) of the square steel pipe column 1 through a pair of upper and lower T-shaped hardware 2 ₁ , 2 _2. As in Example 1, the high strength of the concrete-filled square steel pipe column and the H-shaped steel beam in which a tensile resistance reinforcing material (through bolt 5) is inserted and fixed between the tensile high strength bolts 3 as in Example 1. It is a bolt tension joint structure example.
In this joining structure example, in order to join the H-shaped steel beam 4 to the adjacent A side surface and C side surface, the same T-shaped hardware 2 ₁ , 2 ₂ is joined at the same position, and the arrangement of the through bolts 5 is the same. In such a case, if the through-bolts 5 are arranged orthogonally, the construction becomes difficult due to interference, so the orthogonal through-bolts 5 are arranged so as not to interfere. A description of portions common to the first embodiment will be omitted.

In Example 5, as in Example 1, the arrangement of the tensile high-strength bolt 3 and the through-bolt 5 in the T-shaped hardware 2 ₁ , 2 ₂ is the same, as shown in FIGS. 11 (c) and 11 (d). In this way, the through-holes 5a on the A side and the side on the C side are arranged so that the positions of the T-shaped metal parts joined to the A side and C side of the square steel pipe column 1 are shifted by a distance a in the height direction. This avoids interference with the bolt 5a.
In the fifth embodiment, since the H-shaped steel beam 4 is not joined to the B-side facing the A-side and the D-side facing the C-side of the square steel pipe column 1, the T-shaped hardware 2 ₁ , 2 ₂ is Although not necessary, the flat plate 16 is abutted in order to fix the through bolts 5a and 5b stably and firmly. When the H-shaped steel beam 4 is joined to the B side surface and the D side surface, the T-shaped hardware 2 ₁ , 2 ₂ is joined with the tensile high strength bolt 3 instead of the flat plate 16, but the arrangement of the through bolts 5 a, 5 b is the same. It is.

Example 6 will be described with reference to FIGS. 12A, 12B, and 13. FIG.
This Example 6 is a case where the H-shaped steel beam 4 is joined to two adjacent side surfaces (here, the A side surface and the C side surface) of the square steel pipe column 1 with a tensile high-strength bolt 3 via a pair of upper and lower T-shaped hardware. As in Example 5, a high strength bolt tensile joint structure of a concrete-filled rectangular steel pipe column and an H-shaped steel beam in which a tensile resistance reinforcing material (here, through bolt 5) is inserted and fixed between the tensile high strength bolts 3 is fixed. It is an example.
In the example of the joining structure of Example 6, the size (the height of the vertical flange) and the shape are different in order to join the H-shaped steel beam 4 to the adjacent A side and C side, and the through bolts 5a and 5b are arranged. Is different from Example 5 in that a different T-shaped hardware is used.
For example, it is a combination as shown in the orthogonal form 1 in FIG. 13, and the side A has a length (height) Ls between the bolt holes 17o of the tensile high-strength bolts 3 on both sides. A pair of upper and lower T-shaped hardware 17 ₁ , 17 ₂ provided side by side with bolt holes 17p are joined, and the length (height) L on the adjacent C side surface is a bolt hole of the tensile high strength bolt 3 on both sides. A pair of upper and lower T-shaped metal pieces 18 ₁ and 18 ₂ provided side by side with the bolt holes 18p of the through bolt 5b are aligned with the center of the length of the T-shaped metal objects 17 ₁ and 17 ₂ on the A side and are orthogonal to each other. The through bolt 5a on the A side and the through bolt 5b on the C side are shifted in the height direction. In such an arrangement, even if the through bolts 5a and 5b on the adjacent A side surface and C side surface are orthogonally arranged, interference does not occur. A description of portions common to the fifth embodiment is omitted.

In the case where the length centers of the T-shaped metal pieces 17 ₁ (17 ₂ ) and 18 ₁ (18 ₂ ) on the adjacent A side surface and C side surface are aligned with each other as in the sixth embodiment, the through bolts 5a and 5b are Other orthogonal formats in the case of orthogonal arrangement so as not to interfere with each other include orthogonal formats 2, 3, and 4 in FIG. In the orthogonal forms 2, 3, and 4, the combination of the T-shaped hardware on the A side and the C side is different from the orthogonal form 1, but here, the same reference numerals as in the orthogonal form 1 are used, and the A side and the C side are used. Bolt holes 17o and 18o of the tensile high-strength bolt 3 in the T-shaped metal pieces 17 ₁ (17 ₂ ) and 18 ₁ (18 ₂ ) when the bolts 5a and 5b are arranged orthogonally so as not to interfere with each other, and the through bolt 5a An arrangement example of 5b bolt holes 17p, 18p is illustrated.
In Examples 5 and 6, an example of avoiding interference of through-bolts arranged orthogonally in the case of joining a T-shaped metal piece to two adjacent side surfaces (A side surface and C side surface) as a joint metal piece is shown. Instead of using the end plate, it is possible to avoid interference of through-bolts arranged orthogonally in the same way.

Applying the present invention to a high strength bolt tensile joint structure of a concrete-filled square steel pipe column and H-shaped steel beam that joins a H-shaped steel beam to a square steel pipe column via a joint metal and a tensile high strength bolt, the tensile high strength bolt In order to evaluate the effect when a tensile resistance reinforcing material is provided in the vicinity of the joint, the out-of-plane strength and rigidity (joint strength) of the square steel pipe at the joint were evaluated by a partial tensile experiment using a 1/2 model. FIG. 14 shows the evaluation results (indicated by the relationship between the load P and the deformation δ) of the present invention and the conventional example. The figure on the right shows an example of the bonding structure of the test object in a cross-sectional plan view.
Invention Example A is a joining structure corresponding to Example 1 (when there is no initial tension), B is a joining structure corresponding to Example 3 (when there is no initial tension), and C is according to Example 4. The corresponding joint structure (in the case of no initial tension) is a combination of a tensile high strength bolt and a tensile resistance reinforcing material (through bolt or high strength bolt with an anchor function). D is a conventional structure which is a joint structure that does not use a tensile resistance reinforcing material. In the present invention example and the conventional example, the types of high-strength bolts are different, but the material, shaft diameter, number and arrangement are substantially the same, and the conditions of other parts and elements are substantially the same.

  The results of the evaluation experiment are as shown in FIG. 14, and in the case of the present invention examples of A and B in which a through bolt is used in combination with the conventional example of D using only a tensile high-strength bolt, the yield strength and rigidity are greatly improved. Improvement was observed. In particular, it became clear that the rigidity was most improved when initial tension was introduced at A. In the case of C in which a high-strength bolt with an anchor function was used in combination, a slight improvement in both proof stress and rigidity was recognized as compared with the conventional example of D.

  The present invention is not limited to the contents of the above embodiments. For example, tensile high-strength bolts, through bolts, high-strength bolts with anchor function (model, anchor formation conditions), material, arrangement (including number), insertion / fastening (fixing) structure, joint hardware structure, beam The type of joint, the means for joining with the joint hardware, the presence or absence of the washer, the construction procedure, etc. are changed within the range satisfying the above claims, depending on the object to be joined, the joint placement, the required joint performance, etc. There is something.

(A) A figure is a side cross-sectional explanatory drawing which shows the example of the high strength bolt tension | tensile_strength joining structure of the concrete filling square steel pipe column and H-shaped steel beam by Example 1 of this invention, (b) A figure is Aa of (a) figure. -Ab arrow cross-section top explanatory drawing. (C) The figure is front explanatory drawing of the A and B side surface of FIG. 1 (a) figure. 3 is a three-dimensional explanatory diagram illustrating an example of a T-shaped metal piece used in Example 1. FIG. (A) Side explanatory drawing which shows the example of a tensile high strength volt | bolt set used in Example 1, (b) The figure is a side explanatory drawing which shows the other example of a tensile high volt | bolt set. (A) The figure is side explanatory drawing which shows the example of a through-bolt set used in Example 1, (b) The figure, (c) figure is side explanatory drawing which shows another through-bolt set example. Side cross-section explanatory drawing which shows the example of the high strength volt | bolt tension | tensile_strength joining structure of the concrete filling square steel pipe column and H-shaped steel beam by Example 2 of this invention, (b) A figure is Ba-Bb arrow sectional plane of (a) figure. Illustration. (C) The figure is front explanatory drawing of the A and B side surface of FIG. 5 (a) figure. The solid explanatory drawing which shows the end plate example which welded and joined the H-shaped steel beam used in Example 2. FIG. Side cross-section explanatory drawing which shows the example of the high strength volt | bolt tension | tensile_strength joint structure of the concrete filling square-shaped steel pipe column and H-shaped steel beam by Example 3 of this invention, (b) A figure is a cross-sectional plane of Ca-Cb arrow of (a) figure. Illustration. (C) The figure is front explanatory drawing of the A and B side surface of Fig.7 (a) figure. (A) The figure is a side explanatory view showing an example of a through bolt set used in the third embodiment, (b) is a side explanatory view showing another example of a through bolt set. (A) A figure is a side cross-section explanatory drawing which shows the example of the high strength volt | bolt tension joining structure of the concrete filling square steel pipe column and H-shaped steel beam by Example 4 of this invention, (b) A figure is Da of (a) figure. -Db arrow cross-section top explanatory drawing. (C) The figure is front explanatory drawing of the A and B side surface of Fig.9 (a) figure. (A) A side explanatory view showing an example of a high strength bolt set with an anchor function used in Example 4, (b) A side explanatory view showing another example of a high strength bolt with an anchor function set. (A) The figure is an example of a high strength bolt tensile joint structure of a concrete-filled rectangular tube column and an H-shaped steel beam according to Example 5 of the present invention, and through bolts are arranged on T-shaped metal fittings on two side surfaces of the rectangular steel tube column. FIG. 4B is a cross-sectional explanatory view showing an example of an interference avoidance structure of through-bolts arranged orthogonally, and FIG. 5B is an explanatory cross-sectional plan view taken along arrow Ea-Eb in FIG. FIG. 11 (c) is a front explanatory view of FIG. 11 (a), {the C side surface of FIG. 11 (b)}, and FIG. 11 (d) is a front explanatory view of the A side surface of FIG. 11 (a). (A) The figure is an example of a high-strength bolt tension joint structure of a concrete-filled rectangular tube column and an H-shaped steel beam according to Example 6 of the present invention. Is a front side explanatory view of the C side showing an example of an interference avoidance structure for through-bolts arranged orthogonally, (b) is a cross-sectional plan view taken along the line Fa-Fb in FIG. (C) The figure is front explanatory drawing of the A side surface of Fig.12 (a) figure. As shown in the sixth embodiment of the present invention, when through-bolts are arranged on T-shaped metal fixtures on two adjacent side surfaces of a square steel pipe column, the two-side T-shaped metal bolts avoid interference of through-bolts arranged orthogonally. Explanatory drawing which shows the example of hole arrangement | positioning (an orthogonal form example). The plane cross-section explanatory drawing which shows the example of the high strength volt | bolt tension joining structure of each concrete filling square steel pipe column and H-shaped steel beam made into the experiment object for evaluation experiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Square steel pipe pillar 2 ₁ Upper T-shaped metal hardware 2 ₂ Upper T-shaped metal hardware 2f Vertical flange 2u Horizontal web 2o Bolt hole (tensile high strength bolt)
2p bolt hole (through bolt)
3 Tensile high-strength bolt (head tightening torcia-type high-strength bolt)
3 ₁ Tensile high strength bolt (Torsia type high strength bolt)
3h Head 3s Male thread 3p Pin tail 4 H-shaped steel beam 4a Upper flange 4b Lower flange 4u Web 4o Bolt hole 5, 5 ₂ through bolt (PC steel rod)
5 ₁ through bolt (PC steel bar) (with initial tension)
5a, 5b Through bolt (PC steel bar) (orthogonal arrangement)
5s Male thread 5t Head 6 Concrete 8 Nut 10 Square washer 11 Washer 12 End plate 12o Bolt hole (tensile high strength bolt)
12p bolt hole (through bolt)
13, 13 _1- bolt bolt (deformed PC steel bar)
13s Male thread portion 13x Node-shaped portion 13z Screw-shaped portion 14 High-strength bolt with anchor function 14s Male screw portion 14x Node-shaped portion 14z Screw-shaped portion 15 Anchor-shaped anchor plate 16 Flat plate 17 ₁ Upper T-shaped hardware 17 ₂ Lower T-shaped hardware 17f Vertical flange 17o Bolt hole (tensile high strength bolt) 17p Bolt hole (through bolt)
17u Horizontal web 18 ₁ Upper T-shaped hardware 18 ₂ Lower T-shaped hardware 18f Vertical flange 18o Bolt hole (tensile high strength bolt) 18p Bolt hole (through bolt)
18u horizontal web

Claims (6)

  In a high strength bolt tension joint structure of concrete filled rectangular steel pipe columns and beams using joint hardware and high strength bolts, both sides of the joint hardware joining the beams to the square steel pipe columns are strengthened by tensile resistance near the corners of the square steel pipe columns. Tensile resistance reinforcement with high-strength bolt tension joints with high-strength bolts arranged on the outside of the material, and a shaft part embedded in the concrete inside the square steel pipe column in the region between the high-strength bolt tension joints of this joint hardware A high-strength bolt tension joint structure between a concrete-filled steel pipe column and an H-shaped steel beam, in which the material is inserted and fastened, and concrete is filled and solidified inside the square steel pipe column.   The tensile resistance reinforcing material is a through-bolt made of a steel rod having a fastening portion at an end portion and used with initial tension applied or without initial tension applied, and both ends thereof are joined to a square steel pipe column. 2. The high-strength bolt tensile joint structure of a concrete-filled rectangular steel pipe column and beam according to claim 1, wherein the structure is made to project to the outside of the opposing joint hardware and simultaneously fastened to the opposing joint hardware.   The through-bolt is formed of a deformed steel rod having a fastening portion at an end portion and a screw-like portion or a node-like portion at a shaft portion, and is used without applying an initial tension. 2. A high-strength bolt tension joint structure of a concrete-filled steel pipe column and an H-shaped steel beam according to 2.   2. The high-strength bolt tension joint structure of a concrete-filled rectangular steel pipe column and a beam according to claim 1, wherein the tensile resistance reinforcing material is a bolt with an anchor function at a shaft portion.   In the case where the tensile resistance reinforcing material is arranged orthogonally so as to join the beams in the orthogonal direction, the flange position and the joint hardware position of the orthogonally arranged beams are shifted in the vertical direction, and the tensile resistance reinforcing material of the orthogonal arrangement is arranged. 5. A high-strength bolt tension joint structure between a concrete-filled rectangular steel pipe column and a beam according to any one of claims 1 to 4, wherein mutual interference is avoided.   In the case where the tensile resistance reinforcing material is arranged orthogonally so as to join the beams in the orthogonal direction, the tensile resistance reinforcing material arranged in the orthogonal direction is shifted in the vertical direction so that the mutual interference of the orthogonally arranged tensile resistance reinforcing material is caused. The concrete-filled square steel pipe column and beam high-strength bolt tensile joint structure according to any one of claims 1 to 4, which is avoided.

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