JPH08144368A - Structure and method for connecting end plate type steel frame structure - Google Patents

Abstract

PURPOSE: To provide the structure and the method for connecting end plate type steel frame structure, with which construction is easily performed at a low cost. CONSTITUTION: A steel frame beam 18 having an end plate 17 in both ends thereof is interposed between adjacent steel frame columns 16, 16 and the end plates 17 of both sides are connected to each steel frame column 16 by a bolt. The steel frame beam 18 is divided at a part near the end thereof, and the steel frame divided bodies 18A, 18B of both sides of the division part are connected to each other by an intermediate joint 19. Connection of the shorter steel frame beam divided body 18A to the steel frame column 16 with the end plate 17 is performed by assembling on the ground, and the steel frame column 16, which is assembled on the ground, and the adjacent column 16 are assembled together. The longer steel frame beam divided body 18B is hoisted by a crane. The end plate of the longer steel frame beam divided body 18B is connected to the adjacent steel frame column 16 by a bolt, and both the steel frame beam divided bodies 18A, 18B are connected to each other by the intermediate joint 19.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joining structure for an end plate type steel frame structure in a middle or high rise steel frame building or the like and a joining method thereof.

[0002]

2. Description of the Related Art Conventionally, in a low-rise building of about 2 to 3 floors, a steel frame beam 51 having end plates 50 at both ends is installed between adjacent steel frame columns 52, 52 as shown in FIG. And the end plates 5 at both ends.
A joint structure in which 0 is bolted to each steel frame column 52 has been put into practical use. In this case, even if the steel beam 51 cannot be inserted between the columns 52, 52 due to the erection error of the column interval or the dimensional error of the steel beam 51, the steel column 52 is thin, and therefore, the steel beam 51 is forcibly suspended. It is possible to widen the column interval, and insert the steel frame beam 51 between them to join them. However, in the case of a middle- and high-rise building in which the steel column is thick, the column interval cannot be forcibly widened, and thus the above end plate type joining structure cannot be adopted. Therefore, in the case of middle- and high-rise buildings, the steel beam is bolted to the steel column through a pre-welded bracket or split tee. However, when the bracket type joint is used, since the bracket is welded to the steel column in advance at the factory, there is a problem that the bracket protruding in a branch shape becomes bulky when the steel column is transported, and the transport efficiency is deteriorated. is there. When using split tees, it is possible to join the bolts by absorbing a certain amount of erection error due to the margin of the bolt hole diameter, but not only the joining work is time-consuming, but also the cross-section defect occurs at the beam end and the member efficiency against bending is increased. However, there is a problem that the weight of the steel frame increases as a whole because the weight of the split tee is heavy, which is uneconomical.

It is an object of the present invention to provide a joining structure for an end plate type steel frame structure which is economical and easy to construct, and a joining method therefor.

[0004]

SUMMARY OF THE INVENTION The present invention is an end plate type steel frame in which steel beams having end plates at both ends are interposed between adjacent steel frame columns, and the end plates at the both ends are bolted to the respective steel frame columns. A joint structure of structures, wherein the steel beam is divided in the vicinity of the end,
The steel beam divided bodies on both sides of the divided portion are joined to each other by an intermediate joint. In the joint structure, the intermediate joint may be one in which an attachment plate that overlaps the steel beam divided bodies on both sides is bolted to the steel beam divided bodies on both sides. In the joint structure, the intermediate joint is a bolt joint portion in which a splicing plate overlapping over the steel beam divided bodies on both sides is bolted to the steel beam divided bodies on both sides, and a welded joint portion is formed by welding the steel beam divided bodies on both sides to each other. May consist of In the joint structure, the steel column may be a square steel pipe, and the bolt that joins the end plate to the steel column may be a one-side bolt. In this specification, "one-side bolt" is a general term for a shaft-shaped tightening fitting that can be tightened by plastically deforming the head part at the other end to expand the diameter by operating from one end side, and is also a blind bolt. being called. In the joint structure, the receiving member on which the end plate of the steel beam is placed may be joined to the steel column with one side bolt.

According to a sixth aspect of the present invention, a steel frame beam having end plates at both ends is interposed between adjacent steel frame columns, and the steel frame beam is divided near one end. A method for joining end plate type steel frame structures, wherein the end plates at both ends are joined to each other by bolts by means of an intermediate joint, and the method includes the following steps. That is, the end of the shorter steel beam divided body is joined to the steel column by the construction site,
This steel frame pillar and the pillar next to it are built.
After that, the longer steel beam divided body is lifted by a heavy machine, the end plate of the steel beam divided body is bolted to the adjacent steel frame column, and both steel beam divided bodies are joined at the intermediate joint. In this joining method, a plurality of shorter steel beam segmented bodies are joined to each other at substantially the same height position of the same steel column column so as to extend in different directions, and each short steel beam segmented body extending in these different directions is joined. Of these, some of the steel beam divided bodies may be joined to the steel frame columns by the base structure, and the remaining steel beam divided bodies may be joined after the steel column is built.

Further, the invention method of claim 7 is the joining method in the case where the steel beam is divided in the vicinity of both ends in the joining method, and includes the following steps. That is, the short steel beam divided bodies on both sides are joined to each steel column by the end plates at the construction site by framing. Build up these steel columns that have been erected, and then lift up the intermediate steel beam split body with a heavy machine, and join both ends of this intermediate steel beam split body to both side steel beam split bodies with the intermediate joints. . Also in the case of this joining method, when joining a plurality of end portions of the steel beam segment so as to extend in different directions at substantially the same height position of the same steel column, the steel beam segment of each extending in these different directions Of these, some of the steel beam divisions may be joined to the steel columns by the base structure, and the remaining steel beam divisions may be joined after the steel columns are built.

According to the invention method of claim 8, in the joining method of the respective end plate type steel frame structures, the intermediate joint is provided with an attachment plate which overlaps between the corresponding steel beam divisions, and the attachment plate and the steel beam division. The structure is such that the bolts penetrate the body, and they are bonded in the following process. That is, a bolt thinner than an appropriate diameter for the bolt hole diameter is used as the bolt of the intermediate joint, and the intermediate joint is temporarily joined before the steel beam is built. The temporarily joined steel beam is suspended between the steel columns on both sides, and the end plates at both ends are joined to the steel beams by bolts by the end plates. After that, the bolt of the intermediate joint is replaced with a bolt having an appropriate diameter.

[0008]

According to the joint structure of the present invention, since the steel beam is divided in the vicinity of the end portion and both the steel beam divided bodies are joined to each other by the intermediate joint, the manufacturing error of the length of the steel beam at the intermediate joint,
It is possible to absorb the erection error of the steel column. Therefore, it is possible to easily arrange and join the steel beams between the adjacent steel columns while using the joining method using the end plates. Further, since the divided portion of the steel frame beam is located near the end portion, the joining work of the intermediate joint, which is the joining work at a high place, can be performed near the column, and the scaffolding can be easily secured. It is also possible to use the shorter steel beam divided body as a scaffold to join the intermediate joints. Furthermore, since the beam is joined to the pillar with the end plate,
As in the case of using split tees, there is no loss of cross section due to bolt holes at the end of the beam where a large load acts, so it is not necessary to use a steel aggregate with a large cross sectional shape for the beam. Can be reduced and it is economical. The joint portion by the intermediate joint can have a solid joint structure as needed, and since it is slightly apart from the end portion of the beam, there is little problem of cross-section loss due to the bolt hole. If the intermediate joint is to be bolt-jointed with the attachment plates that overlap the steel beam divided bodies on both sides, the entire joint can be performed only by tightening the bolts. If the intermediate joint is made up of a bolt joint that is joined by bolts with a backing plate and a weld joint that welds the steel beam divided bodies on both sides to each other, by joining the bolt joint first, Welding work for welded joints can be performed easily in places. When the steel frame column is a square steel pipe and the bolt that joins the end plate to the steel frame column is a one-sided bolt, simply by forming a bolt insertion hole in the steel pipe column with a closed cross section, the steel beam divided body is converted into a steel frame column. Can be easily bolted. When the receiving member on which the end plate of the steel beam is placed is attached to the steel column with one side bolt, by temporarily placing the end plate on the receiving member,
It is possible to easily and accurately bolt the steel beam divided body to the steel column.

According to the joining method of the sixth aspect of the present invention, since the bolt joining of the shorter steel beam divided body to the steel column is carried out by the base structure, the number of man-hours for joining work at high places can be reduced and the work efficiency can be improved. good. The joining work of the two steel beam divided bodies by the intermediate joint is performed at a high place, but at this time, the shorter steel beam divided body joined in advance can be used as a scaffold, and the work is easy to perform. In addition, since the shorter steel beam segment is cut near the end of the steel beam, the position of the intermediate joint will be near the steel column, which will ensure the safety of workers when using it as a scaffold. It's easy.

In the case of the joining method according to the invention of claim 7, since the steel beam is divided in the vicinity of both ends, and the short steel beam divided bodies on both sides are joined to the steel column by the ground structure, the height is high. The joining work in is only the work of the intermediate joint, and the work is unified. Further, even when the lengths of the steel beam are different, the length of the shorter steel beam divided body can be set to a fixed length. Therefore, even if the steel beam is divided into two parts, the joining work can be performed efficiently. In the joining method of the invention of claim 9, that is, in each of the joining methods described above, when joining a plurality of short steel beam divided bodies extending in each direction to the same steel frame column, the steel frame beam divided structure is part of the steel frame beam. When the division is performed only and the rest is performed after the steel column is built, the remaining steel beam division of the column can be joined using the grounded steel beam division as a scaffold. For example, only one or two or three of the steel beam divided bodies joined in four directions of the pillar may be grounded. By dividing the structure into the steel structure and the general erection in this way, when the steel beam segment is erected on the steel column in the laid state, the steel column is turned upside down when joining the steel beam segment on the ground side. There is no need for the work of pointing.

In the joining method of the invention of claim 8, in the joining method of the end plate type steel frame structures,
The intermediate joint is configured to be joined with a bolt with a supporting plate, the intermediate joint is temporarily joined with a thin bolt before lifting the steel beam, and after the steel beam is joined to the steel column, the bolt of the intermediate joint has an appropriate diameter. Since all bolts of steel beams can be lifted at one time and joined to steel columns by replacing them with bolts, it is possible to easily insert steel beams between columns by absorbing erection errors between columns with intermediate joints. .

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. In the joint structure of the end plate type steel frame structure of this embodiment, the steel beam 18 having the end plates 17 at both ends is interposed between the adjacent steel frame columns 16 and 16, and the end plates 17 at both ends are attached to the respective steel frame columns 16. It is bolted. The one side bolt 1 is used for this bolt. The steel column 16 is a rectangular steel tube column. The steel beam 18 is made of H-shaped steel and is divided into two near one end thereof. Shorter steel beam division 18A
It is desirable to have a uniform length regardless of the length of the steel beam 18. Both steel frame beam split bodies 18A, 18
The split parts of B are joined together at an intermediate joint 19. The intermediate joint 19 has a friction bolt joint structure using an upper attachment plate 21, a lower attachment plate 22, and a side attachment plate 23.
The upper attachment plate 21 overlaps with the upper surfaces of the upper flanges 18Aa and 18Ba of the two steel frame divided bodies 18A and 18B,
High strength bolts 20 are used to join the steel beam divided members 18A and 18B. The lower attachment plate 22 is made up of the two steel frame beam split bodies 18A, 1
The lower flanges 18Ab and 18Bb of the 8B are overlapped with each other, and the high-strength bolts 20 are used to separate the two steel beam divided bodies 18A and 18B.
Joined to B. It should be noted that the upper attachment plate 21 and the lower attachment plate 22 are provided on the upper and lower surfaces of the upper flanges 18Aa and 18Ba and on the upper and lower surfaces of the lower flanges 18Ab and 18Bb, respectively, as shown in the example of FIG. 7 later. It may be a friction bolt joint structure. The side attachment plate 23 is a web 18Ac, 18B of the two steel-beam divided bodies 18A, 18B.
They are overlapped with each other over c and are joined to the two steel frame beam split bodies 18A and 18B with a high-strength bolt 20. Both steel beam divisions 18A,
A gap G of about 5 mm is provided between the divided portions of 18B. Due to this gap G, the work of hoisting the steel beam 18 and interposing it between the steel columns 16 and 16 can be performed easily, and the erection error between the two steel columns 16 and 16 and the error in the length dimension of the steel beam 18 are absorbed. To be done. In this embodiment, a normal bolt may be used for bolting the end plate 17 to the steel pipe column 16 instead of the one-side bolt 1. In that case, a nut is previously attached to the inner surface of the steel pipe column 16 by welding or the like.

FIG. 2 shows an example of the one side bolt 1 used in the above embodiment. The one-side bolt 1 has a pin 2, a valve sleeve 3, a grip sleeve 4, a shear washer 5, a receiving washer 15, and a nut 6 which are arranged on the outer periphery of the pin 2 in order from the pin head 2a side. And The pin 2 has a pin head 2a having a diameter slightly larger than the pin diameter at its tip, a breaking groove 2d in the middle of the threaded portion 2b following the round shaft 2e, and a short pin tail 2c following the threaded portion 2b. Is provided. The valve sleeve 3 is made of a material softer than that of the grip sleeve 4, and is plastically deformable outward in the form of a brim by the load of the axial force. Washer 1
5 is formed into an inner diameter into which the grip sleeve 4 can enter,
In addition, an annular recess 15a into which the outer peripheral portion of the shear washer 5 fits is provided on the side surface on the pin head side. An inner peripheral portion of the shear washer 5 is engaged with an end surface of the grip sleeve 4 and sheared by a predetermined axial force. Also, in this example, the round shaft portion 2e of the pin 2 is
The distal portion 2e ₁ step portion 2 than the base end side portion 2e ₂ a
The diameter of the grip sleeve 4 is slightly larger than that of the front end side portion 2e ₁ by using f.

The fastening operation of the one side bolt 1 can be performed by using a rotary electric fastening tool (not shown). That is, while the pin tail 2c is gripped by the tightening tool, the nut 6 is engaged by the box-shaped nut engaging portion of the tool.
Tighten. As a result, a compressive force acts between the pin head 2a and the shear washer 5, and the shear washer 5, the grip sleeve 4, and the valve sleeve 3 are sandwiched, and the valve sleeve 3 at the tip end is plastically shaped like a flange outward. It begins to deform. When tightening the nut 6 further, the share washer 5
Shears, and the grip sleeve 4 enters the receiving washer 15 together with the sheared inner diameter portion 5a of the shear washer 5. As a result, when the brim-shaped deformed portion 3a of the valve sleeve 3 engages with the back surface of the rectangular steel pipe column 16, the axial force for tightening the pipe wall of the column 16 and the end plate 17 between the nut 6 and the brim-shaped plastically deformed portion 3a. Will be introduced. When the nut 6 is further tightened and rotated, the pin tail 2 with the predetermined axial force introduced.
c is fractured at the fracture groove 2d (FIG. 2 (B)).

FIG. 3 shows an example of a procedure for joining the steel frame structure. In this example, the shorter steel beam divided body 18A is bolted to the steel column 16 by the end plate 17 at the construction site by framing.
And the steel column 16 adjacent to it is built (FIG. 3 (A)).
After this, the longer steel beam segmented body 18B is lifted by a heavy machine such as a crane (FIG. 3 (B)), and the steel beam segmented body 18B is suspended.
The end plate 17 of B is joined to the corresponding steel frame column 16 by the one side bolt 1 and both steel beam divided bodies 18
A and 18B are joined by the intermediate joint 19 as shown in FIG. In this case, since the shorter steel-beam divided body 18A is grounded to the steel-column 16 in advance, the steel-column 16 of the steel-beam 18 is formed.
It will be possible to perform some of the bolt joining work to the ground,
As a result, safety is improved and work becomes easier. In this work, since a slight gap G is set in the divided portions of the two steel frame beam divided bodies 18A, 18B, the adjacent steel frame columns 16, 1
Even if there is some erection error between the six, the longer steel-beam divided body 18B hung with a heavy machine between the end of the shorter steel-beam divided body 18A and the adjacent steel-column 16 can be easily mounted. Can be plugged. The joining work by the intermediate joint 19 will be performed at a high place, but at this time, the shorter steel beam divided body 18A joined in advance can also be used as a scaffold,
Easy to work with. Further, since the shorter steel beam divided body 18A is cut in the vicinity of the end of the steel beam 18, the position of the intermediate joint 19 is in the vicinity of the steel column 16, and when used as a scaffold, It is easy to secure safety.
Since the shorter steel beam divided body 18A is joined to the steel column 16 at the site as described above, the steel column 16 can be transported from the factory to the site with the steel column 16 alone. There is no protrusion such as, etc., and the transportation efficiency is good. In the joining method of this embodiment, a plurality of shorter steel beam divided bodies 18A are joined so as to extend in different directions at substantially the same height position of the same steel column 16,
It is also possible to join some of the steel beam divided bodies 18A to the steel frame columns 16 by the base structure and join the remaining steel beam divided bodies 18A after the steel frame columns are built. For example, regarding the beam joint portions of the steel frame columns 16 that join the steel beam divided bodies 18A that are short in four directions, 1 to 3 places are set as groundwork. In this case, the joining work of the steel beam segmented body 18A that is joined by the remaining general construction uses the steel beam segmented body 18A that is grounded or the steel beam segmented body 18A that was previously joined by general construction as the scaffolding. And joining work can be performed. In addition, all the steel beam division bodies 18A in four directions
When using as a base structure, the steel pillars 16 in the laid state
It is necessary to reverse the front and back of the steel column 16 when joining the steel beam divided body 18A on the ground side, but by joining a part by a general erection, the above-mentioned reversing work becomes unnecessary and work efficiency is good. Become. The same applies to the case of the joining method of the embodiment shown in FIG.

FIG. 4 shows another example of the procedure for joining the steel frame structure. In this example, first, the adjacent steel frame columns 16 and 16 are built as shown in FIG. Before the steel beam 18 is lifted, the steel beam 18 is divided into two steel beam divided bodies 18A, 18
The split portion B is temporarily joined at the intermediate joint 19. This temporary joining is performed by using, as the bolt of the intermediate joint 19, a bolt 24 having a diameter smaller than an appropriate diameter with respect to the bolt hole diameter. For example, when the proper diameter is 16 mmφ, a 12 mmφ bolt 24 is used for temporary joining. This temporarily joined steel beam 18 is hung between the steel columns 16 on both sides by a heavy machine as shown in FIG. 4 (B), and bolts to the steel column 16 of the end plates 17 at both ends are provided as shown in FIG. 4 (C). Join.
Finally, the temporary joining bolt 24 of the intermediate joint 19 is replaced with a high-strength bolt 20 having an appropriate diameter, and the two steel frame beam split bodies 1 are replaced.
The intermediate joint 19 is used for main joining of the divided portions of 8A and 18B. In this case, the temporary joining bolt 24 of the intermediate joint 19 is
After bolting one end plate 17 to the steel column 16, bolting may be loosened and the other end plate 17 may be bolted to the steel column 16 in the loosened state.
After this, the bolt 20 having an appropriate diameter is replaced. In the case of this joining method, since the two steel beam divided bodies 18A and 18B are temporarily joined with the thin bolts 24 and suspended between the steel columns 16 on both sides, there is a erection error in the interval between the steel columns 16 and 16. Also absorbed by the play of the bolt hole, both steel frame columns 1
The steel beam 18 can be easily inserted between the 6 and 16.

FIG. 5 shows a second embodiment of the present invention. In this embodiment, an H-shaped steel frame column 26 is used in place of the steel pipe column 16 in the example of FIG. In this case, the steel column 26 is not a closed cross section, but the H-shaped steel flange 26a.
Since the end plates 17 at both ends of the steel frame beam 18 are bolted to each other, the high-strength bolt 27 is used as the bolt here instead of the one-side bolt 1 of the above embodiment. Other configurations are similar to those of the embodiment of FIG. The joining operation can be performed in the same manner as in the procedure shown in FIGS.

FIGS. 6A and 6B show a third embodiment of the present invention. In this embodiment, the intermediate joint 29 is attached to the attachment plate 2
Bolt joint part 23 'by 3 and welded joint parts 28A, 2
And 8B. That is, in this embodiment, instead of the upper and lower attachment plates 21 and 22 in the intermediate joint 19 of the embodiment of FIG. 1, the upper and lower flanges 18Aa and 18Ba between the steel beam divided bodies 18A and 18B and the lower flange 18 are replaced.
Welded joints 28A, 28 for field welding between Ab and 18Bb
It is joined at B. The configuration in which the side attachment plate 23 is overlapped with the webs 18Ac, 18Bc of the steel beam divided bodies 18A, 18B and bolted together, and other configurations are the same as those in the embodiment of FIG. The joining operation can be similarly performed by the procedure shown in FIG. In this case, by joining the bolt joint portion 23 'with the attachment plate 23 first and then joining the weld joint portions 28A and 28B, welding work at a high place can be easily and accurately performed. As shown in FIG. 6C, the lower attachment plate 2 of the intermediate joint 19 in the embodiment of FIG.
The intermediate joint 39 may be formed by leaving only 2 between the upper flanges 18Aa and 18Ba of the two steel frame beam divided bodies 18A and 18B. In this embodiment, the steel column 16
May be applied when is made of H-shaped steel.

FIG. 7 shows a fourth embodiment of the present invention. In this embodiment, instead of the intermediate joint 19 of the embodiment of FIG. 1, an intermediate joint 49 is formed by a bolt joint portion 49A and a welded joint portion 49B.
Is configured. Bolt joint part 49A of this example
Is the upper flange 18A of the two steel beam divided bodies 18A and 18B.
a, a pair of upper support plates 21 over the upper and lower surfaces of 18Ba
A and 21B are piled up, and the high-strength bolt 20 is used to divide the two steel frame beams 1
8A, 18B and the two steel frame beam split body 18
A pair of lower attachment plates 22A and 22B are overlapped over the upper and lower surfaces of the lower flanges 18Ab and 18Bb of A and 18B, and are joined to the steel beam divided bodies 18A and 18B by a high-strength bolt 20. The welded joint portion 49B is the bolt joint portion 4
After joining 9A, the entire space between the opposite end faces of the two steel frame beam split bodies 18A and 18B is welded. Other configurations are similar to those of the embodiment of FIG. The joining operation can be performed in the same manner as in the procedure shown in FIGS. This embodiment can also be applied to the case where the steel column is H-section steel.

FIG. 8 shows a fifth embodiment of the present invention. The steel structure joint structure of this embodiment is similar to the embodiment of FIG. 1 except that steel beam 18 having end plates 17 at both ends is
Three steel beam divided bodies 18A are divided in the vicinity of both ends,
18C and 18A, and both ends of the intermediate steel beam division body 18C are connected to the short steel beam division bodies 18A and 18A on both sides by the intermediate joint 1.
They are joined together at 9. Here, the intermediate joint 19
The structure is the same as that of the embodiment of FIG. 1, but the intermediate joints 29, 39 and 49 as in the embodiments of FIGS. 6 to 7 may be used.
Other configurations are similar to those of the embodiment of FIG. In the joining work of this joining structure, the short steel frame beam split bodies 18A, 1 on both sides are
Bolts are attached to each steel frame pillar 16 by the end plate 17 of 8A by erection at the construction site, and the erected steel frame pillars 16 are built (FIG. 8A). After that, the intermediate steel beam divided body 18C is lifted by a heavy machine (see FIG. 8).
(B)), both ends of this intermediate steel beam divided body 18C are joined to the steel beam divided bodies 18A, 18A on both sides with the intermediate joint 19 (FIG. 8C). In the case of this joining method, the steel beam 1
8 is divided in the vicinity of both ends, and the short steel frame beam split bodies 18A on both sides are joined to the steel frame columns 16 by groundwork, so that the joining work at a high place is only the work of the intermediate joint 19, The joining work of is unified. Further, even when the lengths of the steel beam are different, by standardizing the length of the shorter steel beam divided body 18A, the joining work is unified in various steel frame structures. Therefore, the steel beam 18
Even if there are two split points, the joining work can be performed efficiently, and the factory productivity of the steel beam 8 is good.

In FIG. 9A, in the embodiment shown in FIG. 1, the receiving member 30 for mounting the end plate 17 of the steel frame beam 18 on the prismatic steel tube column 16 is attached by the one side bolt 1. The receiving member 30 is made of an angle material. In the embodiment of FIG. 1, since the shorter steel beam segment 18A is grounded to the steel column 16, the longer steel beam segment 18 to be lifted.
The receiving member 30 may be attached only to the side of the steel column 16 to which the B end plate 17 is joined. The bolt insertion hole of the rectangular steel pipe column 16 for mounting the receiving member 30 with the one side bolt 1 is formed in advance in the factory together with other bolt insertion holes for joining the end plates, and the receiving member 30 is attached by the ground structure. By providing the receiving member 30 in this way,
The accuracy of the mounting height of the steel beam divided body 18B to the steel column 16 is improved, and the workability of the joining work is improved. Receiving member 3
Since the one-side bolt 1 is used for mounting 0, the mounting on the square steel pipe column 16 can be easily performed. Even when the plate-shaped receiving member 30 such as an iron plate is attached to the steel column 16 by welding or the like as shown in FIG. 9B, instead of the receiving member 30 of FIG. Effects such as improvement can be obtained.

In FIG. 10, the receiving member 30 of FIG. 9A is replaced with a receiving member 31 made of a pipe material cut into short pieces as shown in FIGS. 10A and 10B. The receiving member 31 made of a pipe material is attached to the one-side bolt 1 attached to the pipe wall of the rectangular steel pipe pillar 16 by covering it between the receiving washer 15 and the rectangular steel pipe pillar 16. The receiving member 31 has a length dimension slightly larger than the thickness of the end plate 17 at the end of the steel beam 18, and a pair of receiving members 31 are arranged side by side with respect to one end plate 17. The receiving washer 15 of the one-side bolt 1 may be a taper surface whose rear surface facing the receiving member 31 side is opened toward the outer periphery as shown in FIG. 10 (C). Thereby, the end plate 17 at the end of the steel beam 18 can be smoothly placed on the receiving member 31 with the back surface of the receiving washer 15 as a guide surface.

FIG. 11 shows an example in which the receiving member 31 of FIG. 10 is provided, and one plate 32 is provided across a pair of one-side bolts 1 provided side by side. The plate 32 is a receiving washer 1 for the one side bolt 1.
It is assumed that the vertical width is larger than the diameter dimension of 5, and is interposed between the receiving washer 15 of the one-side bolt 1 and the receiving member 31. In addition, in the example of FIGS.
In the case of a column such as H-section steel that is not a closed structure, the receiving member 3 is a normal high-strength bolt instead of the one-side bolt 1.
0, 31, 32 may be attached to the pillar 16.

FIG. 12 shows still another embodiment. This example is an example of a joint structure of an end plate type steel structure in which a round steel pipe is used for the steel column 16. End plate 1
Reference numeral 7 is an arcuate cross-section having an inner peripheral surface with a curvature capable of making surface contact with the outer surface of the round steel pipe column 16, and is welded to the end of the steel beam divided body 18A on the standard length side. Other configurations are the same as those in the example of FIG. Even when a round steel pipe is used for the steel column 16 as described above, the joining method shown in each of the embodiments can be similarly adopted. In particular, when the steel frame pillar 16 is a round steel pipe, it is impossible to interpose an end plate type beam between the pillars after the pillars have been built with the conventional integral type steel frame beam. Will be feasible.

[0025]

According to the joint structure of the steel frame structure of the present invention, the steel frame beams having the end plates at both ends are divided in the vicinity of the end portions, and the steel beam divided bodies on both sides of the divided portion are joined to each other. Since the intermediate joint is provided, while using the end plate type steel beam, the intermediate joint absorbs the error in the length dimension of the beam and the erection error of the column, so that the joining work can be performed with good workability. Also, since the beam is joined to the column in the end plate type, compared to split tee joining, there is no cross-section loss due to the bolt holes at the beam end, and a solid structure can be achieved
Moreover, the weight of the steel frame is reduced as a whole, which is economical. Further, since the steel column can be transported from the factory to the site without any protrusion such as a bracket, the transportation efficiency is good and it is economical. In the case of the second aspect of the invention, since the intermediate joint has the bolt joint structure using the attachment plate, the respective portions of the steel frame beam can be easily joined only by tightening the bolts. In the case of the invention of claim 3, since the intermediate joint is composed of the bolt joint portion and the weld joint portion, the welding work of the weld joint portion at a high place is easy by joining the bolt joint portion first. Therefore, the welding quality can be improved and firm joining can be achieved. In the case of the invention of claim 4, since the bolt for joining the end plate to the steel column is a one-sided bolt, it is only necessary to form the bolt insertion hole while using the rectangular steel pipe of the closed cross section for the steel pipe column. The steel beam division can be bolted to the steel column. In the case of the invention of claim 5, since the receiving member on which the end plate of the steel beam is placed is joined to the steel column by the one side bolt, the end plate is temporarily placed on the receiving member, and thus the steel beam split body is formed. The bolt connection to the steel column can be easily performed. Further, the receiving member can be easily attached even though the steel column is a rectangular steel tube column having a closed cross section. In the method for joining a steel frame structure according to the invention of claim 6, the shorter one of the steel beam divided bodies is joined to the steel column by the end plate by erection at the construction site, and the erected steel column and the adjacent column Since it is built in, the work of joining at high places can be reduced, and the work is safe and easy. In the case of the joining method according to the invention of claim 7, the steel beam is divided in the vicinity of both ends, and the short steel beam divided bodies on both sides are joined to the respective steel columns by the end plates by the ground structure. Therefore, there is little problem of increase in man-hours because the ground can be formed even if there are many dividing points. On the other hand, the work of joining the column and the beam at a high place can be unified because only the intermediate joint is required. Therefore, the workability is good and the work quality is improved. In the case of the joining method according to the invention of claim 8, the intermediate joint is temporarily joined with a thin bolt before the steel frame beam is lifted, and after the steel beam is joined to the steel column, the bolt of the intermediate joint is a bolt having an appropriate diameter. Since all the divided parts of the steel beam can be lifted at one time and joined to the steel column, the construction error etc. between columns can be absorbed by the intermediate joint and the steel beam can be easily inserted between the columns. it can. Therefore, workability is good and firm joining can be performed. In the case of the joining method of the invention of claim 9, in the joining method of claim 6 or claim 7, a plurality of short steel beam divided bodies extending in each direction are joined to the same steel column,
Since the framing is performed for a part of the steel beam divisions and the rest is done after the steel columns are built, when joining the steel beam divisions on the ground side of the steel columns that were laid down at the time of erection. Moreover, the work of turning the steel column upside down becomes unnecessary. Further, when the remaining steel beam divided bodies are joined by a general construction, the grounded steel beam divided bodies can be used as scaffolds, and therefore workability is good.

[Brief description of drawings]

1A is a front view of a joint structure of an end plate type steel frame structure according to a first embodiment of the present invention, FIG.
Is an enlarged front view of the relevant part.

2 (A) and 2 (B) are cross-sectional views showing states before and after tightening of a joint portion by a one-side bolt in the same joint structure, respectively.

FIG. 3 is an explanatory view showing an example of a joining procedure of the same steel frame structure.

FIG. 4 is an explanatory diagram showing another example of a joining procedure of the same steel frame structure.

FIG. 5 (A) is a front view of a joint structure for a steel structure according to a second embodiment of the present invention, and FIG. 5 (B) is an enlarged front view of a main part thereof.

6 (A) is a front view of a joint structure of a steel frame structure according to a third embodiment of the present invention, FIG. 6 (B) is an enlarged front view of a main part thereof, and FIG. 6 (C) is an intermediate joint of the joint structure. It is a principal part enlarged front view which shows a modification.

FIG. 7A is a front view of a joint structure for a steel frame structure according to a fourth embodiment of the present invention, and FIG. 7B is an enlarged front view of a main part thereof.

FIG. 8 is an explanatory view showing a procedure for joining the steel frame structure according to the fifth embodiment of the present invention.

FIG. 9 (A) is an enlarged front view of an essential part showing an example in which the end plate receiving member is attached to the steel frame column in the first embodiment, and FIG. 9 (B) shows another end plate receiving member on the same steel frame column. It is a principal part enlarged front view which shows the example attached.

FIG. 10 (A) is an enlarged front view of a main part of a steel frame column showing an example in which another end plate receiving member is attached to the steel frame column in the first embodiment, and FIG. 10 (B) is a cross section of the receiving member attaching part. FIG. 6C is a cross-sectional view of a modified example of the receiving member mounting portion.

11 (A) and 11 (B) are enlarged front and side views of the main part of the steel frame column to which the third example of the receiving member is attached.
FIG. 4 is a cross-sectional view of the receiving member mounting portion.

12A and 12B are a partially cutaway plan view and a partial side view of a steel frame structure joining structure according to a sixth embodiment.

FIG. 13 is a front view of a conventional example.

[Explanation of symbols]

1 ... One side bolt, 16, 26 ... Steel column, 17 ... End plate, 18 ... Steel beam, 18A, 18B, 18C
… Steel beam divisions, 19, 29, 39, 49… Intermediate joints,
21, 21A, 21B ... Top plate, 22, 22A, 2
2B ... Lower support plate, 23 ... Side support plate, 23 '... Bolt joint part, 24 ... Temporary joining bolt, 28A, 28B ... Weld joint part, 30, 31, 32 ... Receiving member, 49 ... Intermediate joint, 49A … Bolt joints, 49B… Welded joints

Claims (9)

[Claims] 1. A steel frame structure in which steel beams having end plates at both ends are interposed between adjacent steel frame columns, and end plates at both ends are bolted to each of the steel frame columns. A joint structure of end plate type steel structures in which the steel beam divided bodies on both sides of the divided portion are joined together by intermediate joints. 2. The joint structure for an end plate type steel frame structure according to claim 1, wherein the intermediate joint is a joint plate that overlaps over the steel frame beam divided bodies on both sides and is bolted to the steel frame beam divided bodies on both sides. 3. The intermediate joint includes a bolt joint portion in which a support plate overlapping the steel beam beam split bodies on both sides is bolted to the steel beam beam split bodies on both sides, and a welded joint portion in which the steel beam beam split bodies on both sides are welded to each other. The joint structure of an end plate type steel frame structure according to claim 1. 4. The steel frame pillar is made of a rectangular steel pipe, and the bolt for joining the end plate to the steel frame pillar is a one-side bolt.
A joint structure of the end plate type steel frame structure described. 5. The joint structure for an end plate type steel frame structure according to claim 4, wherein a receiving member for mounting the end plate of the steel frame beam is attached to the steel frame column with one side bolts. 6. A steel frame beam having end plates at both ends is interposed between adjacent steel frame columns, said steel frame beam is divided near one end, and both steel frame beam divided bodies are joined together by an intermediate joint. , A method of joining a steel structure in which end plates at both ends are bolted to each of the steel columns, and the joining to the steel columns by the end plates of the shorter steel beam divided body is performed by erection at a construction site, The process of building this grounded steel column and its adjacent column, and lifting the longer steel beam segment by a heavy machine, bolting the end plate of this steel beam segment to the adjacent steel column and And a method of joining end plate type steel frame structures including a step of joining both steel frame beam divided bodies at the intermediate joint. 7. A steel frame beam having end plates at both ends is interposed between adjacent steel frame columns, said steel frame beam is divided in the vicinity of both ends, and both ends of an intermediate steel frame divided body are short on both sides. A method of joining a steel frame structure in which end plates at both ends of the steel beam are joined to each of the steel frame columns by bolts by joining the steel beam divided bodies to each other with an intermediate joint, and each steel frame is formed by end plates of the short steel beam divided bodies on both sides. The process of joining the columns to the construction site by framing, the process of erection of these framing steel columns, and the lifting of the intermediate steel beam division by heavy equipment, and the ends of this intermediate steel beam division. And a method of joining the steel beam divided bodies on both sides with the intermediate joint. 8. The method of joining an end plate type steel frame structure according to claim 6 or 7, wherein the intermediate joint is a backing plate that overlaps between the corresponding steel beam divided bodies, and the backing plate and the steel beam divided body. And a process of temporarily joining the intermediate joint before installing the steel beam by using a bolt thinner than an appropriate diameter for the bolt hole diameter in the bolt of the intermediate joint, An end plate including a step of lifting the joined steel beam between the steel columns on both sides to perform bolt connection to the steel beams of the end plates at both ends, and then replacing the bolt of the intermediate joint with a bolt having an appropriate diameter. Form Joining method of steel structure. 9. The method of joining an end plate type steel frame structure according to claim 6 or 7, wherein the steel beam beam split bodies having short ends are extended in different directions at substantially the same height position of the same steel column. A method of joining an end plate type steel structure in which a plurality of steel beam divided bodies are joined to a steel frame column in the base structure and the remaining steel beam divided bodies are joined after the steel column is built.