JP2003056058A - Joint structure of steel pipe column and beam, joining method and splice plate used therefor - Google Patents

Abstract

(57) [Summary] [Problem] A construction having a simple structure, which can be carried out on any of steel pipe columns having a rectangular cross section or a circular cross section, and which does not require complicated processing such as reinforcement on the inner surfaces of these steel pipe columns. Provided are a low-cost joint structure between a steel pipe column and a beam, a joining method thereof, and a splice plate used for the same. SOLUTION: A top plate 10 joined to a column head of a steel pipe column 1 and a plurality of joint pieces 8 to which a lower flange of a beam 15 is joined are provided. A gusset plate 5 also serving as a diaphragm joined to a position corresponding to the flange, a joint 21 joined to the top plate 10, and a plurality of joint pieces extending from the joint 21 and joined to the upper flange of the beam 15 22 having a splice plate 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure between a steel pipe column and a beam at the uppermost portion of a steel frame, a joining method therefor, and a splice plate used therefor. The present invention relates to a joint structure of a steel pipe column and a beam at the uppermost column head in a steel frame having a bidirectional rigid frame structure, a joining method therefor, and a splice plate used therefor.

[0002]

2. Description of the Related Art For example, the uppermost pillar head of each pillar of a low-rise steel frame of the second to third floors is provided with a roof on its upper part, and the roof has various shapes. It is built on top of the top steel structure. Therefore, it is necessary that the tops of the pillars have structural details that do not protrude as much as possible so that the overall height can be suppressed, the structure of the roof can be simplified, and that heat insulation and rain warding can be achieved.

The joint between each column of the low-rise steel frame and the beam is welded to the diaphragm at the position corresponding to the lower flange of the beam to be joined to the lower flange of the column and at the column head by welding, and the diaphragm is almost the same as the beam. It is common to install a bracket of cross section and bolt the upper and lower flanges of the beam to this bracket. This column-beam connection structure has almost the same configuration in the top of the top column.

Used in relatively small structures such as houses,
As a joint structure of columns and beams of a bidirectional rigid frame structure using a rectangular steel pipe different from the above-mentioned joint structure of columns and beams, Japanese Patent Application Laid-Open No. Hei 3 (1999) -1999.
There is an invention described in Japanese Patent Publication No. 17327 (Prior Art 1). The beam-to-column joining structure according to the present invention has a structure in which a support metal having an inverted L-shaped cross section is disposed on the side surface of the upper end of the column to fix a vertical piece of the support metal to the column, Fix the vertical piece of the V-shaped bracket, attach the top plate to the upper end surface of the pillar, and place the bottom plate of the top plate on the bottom piece of the base on the horizontal piece of the supporting metal piece to the side of the pillar. The end of the beam is fixed to the receiving piece of the supporting metal and the horizontal piece of the receiving metal fitting so that the beam is joined to the column.

In addition, as a joint structure of a column and a beam in a column head of a steel frame using an H-shaped column, the actual construction is 5-3403.
There is a device described in Japanese Patent Publication (Prior Art 2). The beam-column joint structure for a column head according to the present invention is a pair of flanges of an H-shaped column, and a T-shaped beam joint member fixed to the outer surface slightly below the column head by bolts, and an angle to the column web at the column head. It is composed of a top plate fixed by bolts with a material, a beam joint plate, and a beam joined to the top plate by bolts.

[0006]

In the prior art 1, since a square steel pipe having a closed cross section is used for the pillar, a bidirectional rigid frame structure can be obtained, but for fixing the bolt inside the pillar. It is troublesome because it requires a device to put a backing and nuts. Further, since the lower flange of the beam is fixed to the T-shaped receiving metal fitting provided on the outer surface of the column, a gap is formed between the column side end of the upper flange of the beam and the outer surface of the column. The distance between the beam side bolt and the pillar side bolt of the receiving piece of the top plate becomes large, and there is a possibility that buckling or local deformation may occur when the beam receives compressive stress. Therefore, in order to prevent such buckling and local deformation, it is necessary to provide reinforcing pieces, fixing bolts, etc., which increases the number of members, complicates the structure, and increases the cost.

Further, since the T-shaped receiving metal fitting is used, the receiving piece is correspondingly long, the whole top plate is large and heavy, and not only the cost is increased but also the workability is improved. There is also a problem in terms of. Furthermore, since the lower flange of the beam is designed to be joined to the end plate provided on the column, it is necessary for the side wall of the column to be formed as a flat surface, and thus in a structure applicable only to square steel pipe columns. is there. For this reason, there is a problem that it cannot be applied to a steel pipe column having an excellent circular cross section in terms of design, and it cannot cope with diversification of structure and design.

In the prior art 2, the beam joined to the weak axis direction (web direction) of the H-shaped column has a flange as a column, which is typical of a steel frame using an H-shaped column having a directional cross-sectional performance. Since the web is not joined to the column, but only the web is joined to the column, the column has a non-ramen structure in the weak axis direction and cannot be a bidirectional frame structure. Further, the lower flange of the beam in the strong axis direction (flange direction) of the H-shaped steel column is an end plate joint using a T-shaped beam joint material,
Since the beam joining material projects from the side surface of the column, it will adversely affect the ceiling and the finish of the column (enclose the column with boards, etc.).

Further, although there is an advantage that the welding work is relatively small and the accuracy control is easy, there is a problem that the number of joining bolts is large and reinforcement is required on the column side, and at least the beam joining material is required. Since the end of the beam is separated from the outer surface of the column by the thickness of the vertical piece, the top plate that joins the upper flange of the beam and the column is susceptible to buckling and local deformation when subjected to compressive stress. There's a problem.

The present invention has been made in order to solve the above problems, and has a simple structure and can be applied to any steel pipe column having a square or circular cross section, and the inner surface of these steel pipe columns is reinforced. It is an object of the present invention to provide a low-cost joint structure of a steel pipe column and a beam, which has excellent workability and does not need to be subjected to troublesome processing, a joining method thereof, and a splice plate used therefor.

[0011]

(1) A joint structure of a steel pipe column and a beam according to the present invention has a plurality of joints in which a top plate joined to a column head of the steel pipe column and a lower flange of the beam are joined. A gusset plate that also has a piece and is joined to a lower flange of a beam that is joined to it of the steel pipe column and also serves as a diaphragm; a joint portion that is joined to the top plate; and a portion that extends from the joint portion. And a splice plate having a plurality of joining pieces joined to the upper flange of the beam.

(2) Further, the bolt is inserted into the bolt insertion hole provided in the top plate of the above (1) with the head downward from the lower surface side, and the bolt is fixed to the lower surface of the top plate.

(3) Further, at the joint portion between the steel pipe column and the beam of the above (1) or (2), at least one opening is provided in the side wall of the steel pipe column.

(4) In the method of joining a steel pipe column and a beam according to the present invention, a top plate is welded to a column head in a factory or the like, and a position corresponding to a lower flange of the beam having a plurality of joining pieces is joined. A step of vertically arranging a plurality of steel pipe columns to which a gusset plate also serving as a diaphragm is welded and joined at a predetermined position, and placing both ends of the beam on the joint pieces of the gusset plates of the adjacent steel pipe columns and temporarily fixing them. And a step of placing a splice plate having a plurality of joining pieces on a top plate provided on the steel pipe column to temporarily fix the top plate and the upper flange of the beam, and the temporarily fixed gusset plate. And a step of fixing the lower flange of the beam, the splice plate and the top plate, and the upper flange of the beam with bolts, respectively.

(5) The splice plate according to the present invention is used in any one of the above (1) to (4), and has a joint portion to be joined to a top plate provided on a stigma of a steel pipe column. A plurality of joint pieces extending from the joint portion and joined to the upper flange of the beam and having a width substantially equal to the width of the upper flange are provided, and R is provided at a corner portion of the joint portion of the joint piece.
It is processed or diagonally cut. (6) Further, a substantially circular through hole is provided in the central portion of the joint portion of the splice plate of the above (5).

[0016]

1 is a perspective view of a joint structure of a steel pipe column and a beam according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view of FIG. In both figures, 1 is a column (hereinafter referred to as a steel pipe column) that constitutes a steel frame made of a rectangular steel pipe.

Reference numeral 5 denotes a gusset plate which also serves as a diaphragm made of a steel material and is provided on the steel pipe column 1 at a position corresponding to a lower flange of a beam 15 which will be described later. As shown in FIG. A joint 6 (diaphragm) having a rectangular opening 7 slightly larger than the outer shape, and the joint 6
And a joining piece 8 having a width substantially equal to the width of the lower flange to which the lower flange of the beam 15 is joined. Reference numeral 9 denotes a plurality of bolt insertion holes provided in each joint piece 8. Since the opening 7 provided in the joint portion 6 is formed to be slightly larger than the outer shape of the steel pipe pile 1, the cut-out portion of the plate is attached to the top plate 10 to be joined to the pillar head of the steel pipe column 1 described later. Since it can be used, that part can be effectively utilized. This gusset plate 5
Is fitted into the steel pipe column 1 and is joined to the outer peripheral surface of the steel pipe column 1 by welding at a position corresponding to the lower flange of the beam 15.

FIG. 4 (a) shows another example of the gusset plate 5, in which a small opening 7a is provided in a plate-shaped joint 6a (diaphragm). The opening 7a may be omitted. The gusset plate 5 configured in this manner traverses the steel pipe column 1 at a position corresponding to the lower flange of the beam 15, and abuts the joint part 6a of the gusset plate 5 between the traversed upper and lower steel pipe piles 1, These are joined together by welding (which is generally the same as a method called a through diaphragm).

In FIGS. 3 (a) and 4 (a), as shown in FIG. 1, the gusset plate 5 is shown when the core of the beam 15 in any direction coincides with the center of the steel pipe column 1. However, when the core of some of the beams 15 does not coincide with the center of the steel pipe column 1, the gusset plate 5 as shown in FIG. 3B or 4B may be used. Although not shown, the cores of all the beams 15 may not coincide with the centers of the steel pipe columns 1, but in such a case, as shown in FIG.
According to the gusset plate 5 of (b), a gusset plate in which the joining piece 8 is biased to one side may be used.

Further, the joint portions 6, 6 of the gusset plate 5
The case where three joining pieces 8 are provided in the three directions of a is shown,
When the beams 15 are joined to all the side surfaces of the steel pipe column 1, cross-shaped joining pieces 8 may be provided on the four sides of the joining portions 6 and 6a, and the beams 15 may be provided only on the wall surfaces in two adjacent directions. When joining, two joining pieces 8 may be provided at 90 ° intervals in the joining portions 6 and 6a.

Reference numeral 10 denotes a top plate made of a steel plate welded to the column head of the steel pipe column 1, and its outer shape is the steel pipe column 1.
The shape is substantially equal to or slightly larger than the planar shape of No. 2, and a plurality of bolt insertion holes 11 are provided. In this case, as described above, it is efficient to use a plate in which the joint portion 6 of the gusset plate 5 is hollowed out. 1
Reference numeral 5 denotes a beam made of a steel material having an H-shaped cross section, which is joined to the steel pipe column 1, and a splice plate 20 described later is provided on the upper flange thereof.
And a bolt insertion hole 16b for joining to the joining piece 8 of the gusset plate 5 are provided in the lower flange.

Reference numeral 20 is a splice plate which is joined to the top plate 10 provided on the column head of the steel pipe column 1 and is joined to the upper flange of the beam 15, and as shown in FIG. Has three joining pieces 22 joined to the upper flange of the beam 15, and these joining pieces 22 are formed to have a width substantially equal to the width of the upper flange of the beam 15 and are adjacent to each other. In order to prevent stress concentration in the portion of 22 which overlaps with the top plate 10 (the corner of the joint), R processing 2 as shown in FIG.
3 or diagonal cutting 23 as shown in FIG.
a is given. Therefore, the joint portion 21 of the splice plate 20 is formed smaller than the outer shape (shown by the broken line) of the top plate 10.

Further, the joint plate 21 has a top plate 1
The bolt insertion hole 24 corresponding to the 0 bolt insertion hole 11
Each joint piece 22 is provided with a bolt insertion hole 25 corresponding to the bolt insertion hole 16a provided on the upper flange of the beam 15. Reference numeral 26 is a substantially circular through hole provided in the central portion of the joint portion 21, but this may be omitted.

In FIG. 5A, as in the gusset plate 5, the core of the beam 15 in any direction is the steel pipe column 1.
The splice plate 20 is shown in the case where it coincides with the center of the steel pipe column 1. However, in the case where the centers of some beams 15 do not coincide with the center of the steel pipe column 1, the splice plate 2 as shown in FIG.
0 may be used. In addition, although the cores of all the beams 15 may not coincide with the centers of the steel pipe columns 1, in such a case, according to the splice plate 20 of FIG.
A splice plate in which the joining piece 22 is biased to one side may be used.

In the above description, the case where three joint pieces 22 are provided on three sides of the joint portion 21 of the splice plate 20 is shown. However, when the beams 15 are jointed to all the wall surfaces of the steel pipe column 1, respectively. The cross-shaped joining pieces 22 may be provided on all four sides of the joining portion 21, and when the beams 15 are joined only to the wall surfaces in two adjacent directions, two joining pieces 22 may be provided on the joining portion 21. Good.

Next, an example of the construction procedure of the present embodiment, which comprises the above-mentioned members, will be described. First, in a factory or the like, as shown in FIG. 6, at the position corresponding to the lower flange of the beam 15 joined to the steel pipe column 1, the steel pipe column 1 is provided at the position shown in FIG.
The gusset plate 5 described in 1 above is joined by welding, and then the top plate 10 is joined by welding to the column head of the steel pipe column 1.

When the top plate 10 is joined to the column head of the steel pipe column 1, since the steel pipe column 1 has a closed cross section, it is necessary to take measures against the treatment of the bolt for joining the splice plate 20. In the present embodiment, as shown in FIG. 7A, the bolt 12 is previously inserted from the lower surface side of the top plate 2 into the bolt insertion hole 11 with the head down, and the bolt 12 co-rotates or drops. The top plate 10 fixed by welding or the like is welded to the column head of the steel pipe column 1 so as not to come into contact.

As another example, as shown in FIG. 6 (b), the wall surface of the steel pipe column 1 is provided in the region between the column head of the steel pipe column 1 and the gusset plate 5 joined thereto. , A size that can be put into the hand (for example, 10cm × 10c
m) one or two openings 2 are provided, and a bolt 12 is inserted by inserting a hand through the openings 2 so that the bolts can be inserted into the bolt insertion holes 11 from below the top plate 10 fixed to the pillar head. It was done. In this case, as shown in FIG. 8A, the opening 2 may be provided so as to overlap with the web position of the beam 15, and when the core of the beam 15 is displaced from the center of the steel pipe column 1 to be joined, As shown in FIG. 8B, the opening 2 may be provided while avoiding the web position of the beam 15. It should be noted that the opening 2 may be provided for taking out piping, wiring, etc., which will be described later, even when the bolt 12 is fixed to the top plate 10 as shown in FIG. 7A.

As described above, the plurality of steel pipe columns 1 to which the gusset plate 5 and the top plate 10 are joined are transported to the construction site, and each of them is erected at a predetermined position. Then, the beam 15 in each direction is lifted by a crane or the like, and both ends thereof are joined pieces 8 of the gusset plate 5 of the adjacent steel pipe columns 1.
It is placed on top, and a small number of bolts are respectively inserted into the bolt insertion holes 9 and 11 and temporarily fixed.

Next, the splice plate 20 is placed on the top plate 10, and the joint pieces 22 are placed on the upper flanges of the beams 15 for alignment, and the joint portions 21 and the joint pieces 22 are placed on top. Plate 10
And, it is temporarily fastened to the upper flange of each beam 15 with a small number of bolts. In addition, when the steel pipe column 1 is provided with the opening 2,
As shown in, the pipes and wiring 30 arranged in the steel pipe column 1
Can be taken out from this opening 2 and installed along the beam 15. Finally, after inserting the bolts into all the bolt insertion holes and checking the condition of the entire frame, if the nuts of all the bolts are fully tightened and joined by friction welding or bearing connection, the steel frame with the bidirectional rigid frame structure The joining of the steel pipe column 1 and the beam 15 at the top of the frame is completed.

In the above description, as one of the treatment methods of the bolt 12 for joining the splice plate 20 to the top plate 10, one or two on the wall surface of the steel pipe column 1 as shown in FIG. 7B. The case where the two openings 2 are provided is shown, and this point will be considered.

In general, providing such an opening (hole) 2 at the joint between a steel pipe column and a beam is often a mechanical problem, and there is no actual case of making a hole. However, the stress on the top of the top floor of a relatively low-rise building is small, and since the structure is such that the connection can be constructed by a simple method as described above, the mechanical problem due to holes is small. However, even in such a case, it is not possible to make holes unnecessarily, and in this embodiment, a unique method of making holes is adopted.

That is, as shown in FIG. 10 (a), considering the case where the opening 2 is provided on the wall surface on the front side (beam 15a side) of the steel tube column 1, the stress from the beam 15a is Since the diaphragm flows to both walls of the steel pipe pillar 1, the opening 2 on the beam 15a side of the steel pipe pillar 1 does not affect the flow of stress. Further, since the stress of the beam 15b in the horizontal direction is generally obtained by shifting the beam 15b to one side and joining the beams, the stress in this direction has a small influence. Further, after the construction, the opening 2 provided on the side of the beam 15a restricts the role of the opening because the web of the beam 15 interferes with the operation of the bolt 12 to the top plate 10.
Insertion and preparation of wiring and piping may be performed before joining the beams 15a, so that there is no problem in construction even at such a position.

Further, as shown in FIG. 7B, the steel pipe column 1
The openings 2 may be provided on both side walls facing each other. In this case, the stress of the beam 15a flows in the vicinity of the opening 2, but since the side walls share the stress, the relatively small stress originally flows by half. The effect of stress is small unlike the case of. Further, in the present embodiment, since the web of the beam is not joined to the steel pipe column 1, the web rarely acts on the side wall of the steel pipe column 1. In this respect also, the opening 2 as shown in FIG. 7 is provided. It is possible.

FIG. 11 is a perspective view showing another example of the present invention.
In this example, an inverted U-shaped hanging metal fitting 13 is attached to the central portion of the top plate 10 provided on the pillar head of the steel pipe pillar 1 by welding or the like.
When it is joined to the top plate 10, the through hole 2
6, the upper part of the hanging metal fitting 13 is exposed. In this case, the top of the hanging metal fitting 13 is located substantially flush with the top of the fixing bolt of the splice plate 20.

With this structure, the steel pipe column 1 before the beam 15 and the splice plate 20 are joined (see FIG. 6).
When the above state is lifted by a crane or the like, this hanging fitting 13 can be used. Further, after the splice plate 20 is attached, since the top of the hanging metal fitting 13 is located on substantially the same plane as the top of the fixing bolt of the splice plate 20, there is no hindrance to the construction after that, so the hanging metal fitting is not interfered with. The construction can be continued without removing 13 or cutting off. Further, it can be used when attaching a support material for roof construction in advance.

In the above description, the case where the square steel pipe is used for the column forming the steel frame has been described, but the gusset plate 5 is used.
The present invention can also be applied to the joining of a steel pipe column made of a steel pipe with a circular cross-section (round steel pipe) and a beam by changing a part of the shape (such as a rectangular steel pipe column in the present invention). Steel pipe columns together with round steel pipe columns).

In the present invention constructed as described above,
A gusset plate 5 integrated with a diaphragm is used to join the lower flange of the beam 15 to the steel pipe column 1, and the lower flange of the beam 15 is joined to the joining piece 8 of the gusset plate 5 by bolts or friction joining. Moreover, since the outer shape of the top plate 10 provided on the column head of the steel tube column 1 is formed to be slightly larger than or substantially equal to the outer shape of the steel tube column 1, the ends of the beams 15 are sufficiently close to the steel tube column 1. It is possible to install the beam 15 on the steel tube column 1 without the need of joining the web of the beam 15 to the steel tube column 1. This makes the beam 1
Since the gusset plate for the web provided on the steel pipe column 1 for the web joining of No. 5 can be omitted, not only the material can be saved by that much, but also the installation and the labor for joining the web of the beam 15 can be omitted, and the cost is greatly reduced. can do.

Further, since the end of the beam 15 can be installed close to the steel pipe column 1, the protruding length of the joint pieces 8 and 22 of the gusset plate 5 and the splice plate 20 can be shortened. It is possible to improve the sex. Further, since the gap between the end of the beam 15 and the steel pipe column 1 is small, it is possible to prevent buckling or local deformation of the splice plate 20 even if the beam 15 receives a compressive stress.

The splice plate 20 for joining the top plate 10 provided on the column head of the steel pipe column 1 and the upper flange of the beam 15 has the upper flange of the beam 15 at the portion (joint 21) to be joined to the top plate 2. A plurality of joint pieces 22 that are joined to each other are provided, the width of the joint pieces 22 is formed to be substantially equal to the width of the upper flange of the beam 15, and a portion that overlaps with the top plate 10 (a corner portion of a portion orthogonal to the joint portion 21) To
Since R processing 23 or diagonal cutting processing 23a is applied,
It is possible to prevent stress concentration on this portion. Also,
As a result, it is possible to realize the splice plate 20 that is lightweight and small in size and has good workability as compared with a conventional splice plate having a large weight and poor workability.

Further, if the through hole 26 is provided in the central portion of the joint portion 21 of the splice plate 20, the weight can be further reduced, and the hanging metal fitting 13 provided on the top plate 10 of the steel pipe column 1 can be used for the through hole 26. The top part of the hanging metal fitting 13 which is housed in the inside 26 and exposed from the top plate 1
By making the height almost equal to the top of the bolt that fixes 0, not only will it not interfere with the roof construction, but also attach the support material etc. for roof construction to this hanging fitting 13 in advance. You can

In addition, in order to prevent the bolt from rotating together and dropping, the bolt is inserted into the bolt insertion hole 11 of the top plate 10 joined to the column head of the steel pipe column 1 with the head downward from the lower surface in advance. Since it is fixed to the lower surface, the splice plate 20 can be easily and reliably joined to the top plate 10 even in the steel pipe column 1 having a closed cross section. Further, an opening 2 is provided in the side wall of the steel pipe pillar 1 at the joint of the beam 15, and a bolt is inserted into the bolt insertion hole 11 of the top plate 10 joined to the head of the pillar from the opening 2 by inserting a hand. Since the splice plate 20 is joined by bolts, the splice plate 20 can be joined easily and surely, and as shown in FIG. 9, pipes, wirings, etc. 30 arranged in the steel pipe column 1 can be inserted from the opening 2. It can be taken out and arranged.

Further, if the through hole 26 is provided in the central portion of the joint portion 21 of the splice plate 20, it contributes to further weight reduction, and the hanging metal fitting 13 provided on the top plate 10 of the steel pipe column 1 is provided in the through hole 26. Since it can be housed inside, not only can the steel pipe column 1 be easily lifted by a crane, but also the subsequent work can be carried out without trouble even if this hanging metal fitting 13 is not removed or cut off. .

In the construction, the beam 15 should be temporarily placed on the gusset plate 5 provided on the steel pipe column 1 and temporarily fixed without positioning in the height direction, and the lifting work should be released early. You can Therefore, not only the number of assembling steps can be shortened, but also the expensive wrecker cost can be saved.

[0045]

The joint structure of a steel pipe column and a beam according to claim 1 is a top plate joined to the column head of the steel pipe column, a gusset plate joined to the steel pipe column having a plurality of joining pieces, and a top. Since a two-direction rigid frame structure is constructed by joining a steel plate column and a beam by friction welding or pressure bearing welding, the end portion of the beam is provided. Can be installed close to the steel pipe column. For this reason, the web joining of the beam to the steel pipe column can be omitted, and thus the cost can be significantly reduced. Further, since the gap between the end portion of the beam and the steel pipe column can be reduced, buckling or local deformation of the splice plate does not occur even when the beam receives a compressive stress.

The joint structure of the steel pipe column and the beam according to claim 2 is
Since the bolt is previously inserted from the lower surface with the head downward and is fixed in the bolt insertion hole provided in the top plate according to claim 1, the splice plate can be joined easily and securely even in a steel pipe column having a closed cross section. Can be done.

A joint structure of a steel pipe column and a beam according to claim 3 is
An opening is provided in the side wall of the steel pipe column at the joint of the beam, and when joining the splice plate to the top plate, we put a hand through this opening to insert bolts, tighten bolts, etc. The splice plate can be joined easily and surely even in the steel pipe column. Further, the pipes, wirings, etc. arranged in the steel pipe column can be taken out from this opening.

A method for joining a steel pipe column and a beam according to claim 4 is
A process of standing up a plurality of steel pipe columns to which a top plate and a gusset plate are joined at a predetermined position, a process of placing both ends of a beam on the gusset plates of adjacent steel pipe columns and temporarily fixing them, and a top plate Since the step of placing the splice plate on the top plate and the beam and temporarily fixing it to the beam and the step of permanently fastening and fixing each of these members by bolts are provided, almost the same effect as in the case of claim 1 is provided. It can be obtained, and the construction period can be shortened.

A splice plate according to a fifth aspect of the present invention has a joint portion joined to a top plate provided on a column head of a steel pipe column and a plurality of joint pieces having a width substantially equal to a width of an upper flange of the beam. Since the rounded corners of the joint are rounded or obliquely cut, it is possible to obtain a splice plate that is lightweight and small in size without stress concentration at the corners of the joint.

Since the splice plate according to claim 6 has a substantially circular through hole in the central portion of the joint portion according to claim 6, it contributes to further weight reduction and a hanging fitting provided on the pillar head of the steel pipe column. Can be accommodated in this through hole, and the subsequent work can be performed without any trouble.

[Brief description of drawings]

FIG. 1 is a perspective view of a joint structure of a steel pipe column and a beam according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of FIG.

3 is a plan view of the gusset plate of FIG. 1. FIG.

FIG. 4 is a plan view of another example of the gusset plate of FIG.

5 is a plan view of the splice plate of FIG. 1. FIG.

FIG. 6 is a perspective view showing a state in which the steel pipe column of FIG. 1 is assembled in a factory or the like.

FIG. 7 is an explanatory view showing how the top plate is attached to the steel pipe column.

FIG. 8 is an explanatory diagram showing positions of openings provided in a steel pipe column.

FIG. 9 is an explanatory diagram showing another example of using the opening provided in the steel pipe column.

FIG. 10 is an explanatory diagram showing a relationship between an opening provided in a steel pipe column and stress.

FIG. 11 is a perspective view of another example of a joint structure of a steel pipe column and a beam according to the present invention.

[Explanation of symbols]

1 steel pipe pillar 2 openings 5 gusset plate 6,6a joint 8 joining pieces 10 top plate 15 beams 20 splice plate 21 joint 22 joining piece 23 R processing 23a Diagonal cutting 26 through holes

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Claims (6)

[Claims] 1. A joint structure of a steel pipe column and a beam at the uppermost part of a steel frame, wherein a top plate joined to a column head of the steel pipe column and a plurality of joint pieces joined to a lower flange of the beam are provided. Have,
A gusset plate that also serves as a diaphragm and is joined to a position corresponding to the lower flange of the beam that is joined to the steel pipe column, a joint that is joined to the top plate, and an upper portion of the beam that extends from the joint. A joint structure of a steel pipe column and a beam, comprising: a splice plate having a plurality of joint pieces joined to a flange. 2. The steel pipe according to claim 1, wherein the bolt is inserted into the bolt insertion hole provided in the top plate from the lower surface side with the head downward, and the bolt is fixed to the lower surface of the top plate. Joint structure of columns and beams. 3. The joint structure of a steel pipe column and a beam according to claim 1, wherein at the joint portion of the steel pipe column and the beam, at least one opening is provided in a side wall of the steel pipe column. 4. A plurality of steel pipes in which a top plate is welded to a pillar head in a factory or the like, and a gusset plate also serving as a diaphragm is welded to a position corresponding to a lower flange of a beam having a plurality of joint pieces. A step of erecting a pillar at a predetermined position; a step of placing both ends of the beam on a joint piece of the gusset plate of the adjacent steel pipe pillar and temporarily fixing the beam; and a splice plate having a plurality of joint pieces Placing on a top plate provided on a steel pipe column and temporarily fixing to the top plate and the upper flange of the beam, and the temporarily fixed gusset plate and the lower flange of the beam, the splice plate and the top plate and the beam And a step of fixing the upper flanges with bolts, respectively. 5. The splice plate used in any one of claims 1 to 4, wherein a joint portion joined to a top plate provided on a column head of a steel pipe column and a beam extended from the joint portion are provided on the beam. A splice plate having a plurality of joint pieces having a width substantially equal to the width of the upper flange joined to the flange, and R-working or oblique cutting processing being applied to the entering corner portion of the joint part of the jointing piece. . 6. The splice plate according to claim 5, wherein a substantially circular through hole is provided in the central portion of the joint portion.