JP7318220B2 - Beam-column connection structure and construction method of beam-column connection structure - Google Patents

Description

TECHNICAL FIELD The present invention relates to a column-to-beam joint structure for joining a steel frame beam formed of shaped steel to a steel frame column formed of square steel pipes, and a construction method thereof.

In general, the beam-to-column joint of a Rahmen structure composed of steel beams made of H-shaped steel and steel columns made of square steel pipes is used to join the steel beams to the vertical surfaces of the steel columns in advance. is welded at a steel frame factory, and the steel beam flange and web are sandwiched between the bracket material and the bracket material at the construction site with splice plates to join them with high-strength bolts. However, with this joining method, since the bolt heads of the high-strength bolts protrude from the upper surface of the steel frame beam, horizontal materials such as the ALC panel installed on the beam and the deck plate that receives the floor slab interfere with the high-strength bolts during work. There is a problem that the efficiency is lowered. In addition, since the bracket members are welded in a steel frame factory so as to protrude from the vertical surface of the steel frame column, there is a problem that the protruding bracket members during transportation deteriorate the transportation efficiency. Therefore, a column-to-beam joining method has been invented in which the joining position of the high-strength bolt is devised and the end plate of the beam is attached directly to the panel zone without the bracket material.

For example, in the invention described in Patent Document 1, a tap screw hole having a female thread formed on the inner peripheral surface is formed in advance in a steel frame column, and a locking plate is fixed to the edge in the longitudinal direction of the steel frame beam. The stop plate is brought into contact with the vertical surface of the steel frame column, and the one-side bolt is connected to the through hole and the tapped screw hole formed in the locking plate to rotate in the tightening direction, thereby joining the steel frame column and the steel frame beam. points are disclosed. In this invention, since the steel frame column and the steel frame beam can be easily joined by simply tightening the one-side bolt from one direction without welding the bracket material to the steel frame column, transportation efficiency and workability can be improved.

In addition, in the inventions described in Patent Documents 2 and 3, a general high-strength bolt is set in a hollow portion of a steel frame column, and the bolt shaft of the high-strength bolt protrudes outward from a through hole formed in the steel frame column. It describes a jig that allows In this invention, the steel frame column and the steel frame beam can be easily joined simply by screwing the nut onto the bolt shaft protruding to the outside of the hollow portion and tightening it without applying complicated processing to the steel frame column and the steel frame beam. Therefore, workability can be improved.

Japanese Utility Model Laid-Open Showa 60-158010 JP 2000-213070 Japanese Patent Laid-Open No. 9-96015

However, the invention described in Patent Literature 1 requires a special process of pre-drilling a tapped screw hole in the steel frame column, which raises the problem that the production is complicated and the production cost increases. In addition, since special bolts called one-side bolts are used instead of commonly used high-strength bolts such as hexagonal high-strength bolts and Torsia type high-strength bolts, they are designated as a designated building material according to Article 37, Paragraph 1 of the Building Standards Act. It has the disadvantage that it cannot be used at construction sites unless it is certified by the Minister of Land, Infrastructure, Transport and Tourism. In addition, although the inventions described in Patent Documents 2 and 3 can join a steel frame column and a steel frame beam using a general member, the configuration of the jig for arranging the high-strength bolt in the hollow part of the steel frame column Since the operation is complicated, it may take time for a worker who is unfamiliar with the operation of the jig to align the high-strength bolt with the through hole formed in the steel frame column, which may reduce work efficiency.

Therefore, the present invention has been made in view of the above-mentioned problems, and the steel beam and the steel frame column can be easily joined using common members without applying special processing to the steel frame beam and the steel frame column. It is an object of the present invention to provide a beam-to-column joint structure and a construction method using the beam-to-column joint structure.

A first beam-to-column connection structure of the present invention includes a steel frame column made of square steel pipes and a flat plate-like end plate fixed to the longitudinal edge of a long beam made of shaped steel. A beam-to-column joint structure for joining a steel frame beam, comprising: a plurality of first bolts for penetrating and joining the steel frame column and the end plate; and a second bolt having a longer bolt axis than the plurality of first bolts; A flat fixing plate that non-rotatably fixes the bolt heads of a plurality of first bolts and one axial end of the second bolt to one plate surface, and is inserted into the hollow part of the steel frame column. Only the bolt shaft of the second bolt is protruded outside the outer surface of the steel frame column from a position that avoids the joint fitting and the end plate, and the first nut is screwed to the tip of the bolt shaft that protrudes from the steel frame column. A temporary fixing mechanism for temporarily fixing the joint fitting to the steel frame column, and a first nut of the joint fitting temporarily fixed to the steel frame column by rotating in the tightening direction, the fixing plate is a moving mechanism that moves the other plate surface until it abuts against the inner surface of the steel frame column and penetrates the plurality of first bolts through the steel frame column and the end plate ; and a second nut that joins the steel frame column and the end plate by being screwed onto the bolt shafts of the plurality of first bolts projecting outward from the side surface .

In the second beam-to-column joint structure of the present invention, the steel frame columns are formed by welding and joining the edge surfaces of the long column portions each formed of a square steel pipe and the panel zone joined to the steel frame beams. The panel zone has a plurality of first through holes into which the plurality of first bolts are inserted and a second through hole into which the second bolts are inserted in a plate portion forming one surface of a square steel pipe. It is characterized by being formed

In the third column-to-beam connection structure of the present invention, the plurality of first bolts are respectively inserted into the plurality of first bolt holes formed in the fixing plate, and the bolt heads are connected to the one side of the fixing plate. It is fixed to the fixed plate by being covered with a fixed cover fixed to the plate surface of the plate.

In the fourth column-to-beam connection structure of the present invention, the second bolt is inserted into a second bolt hole formed in the fixing plate and fixed by welding to the fixing plate on the one plate surface side of the fixing plate. It is characterized by being

In the fifth column-to-beam connection structure of the present invention, the plurality of first bolts includes a plurality of high-strength bolts having pintails formed at their tips, and temporary bolts used for temporarily assembling the steel frame column and the steel frame beam. And, it is characterized by having.

A first method for constructing a beam-to-column joint structure of the present invention is a construction method for a beam-to-column joint structure in which the steel beam and the steel frame column are joined using a second beam-to-column joint structure, A fitting is inserted into the hollow portion of the panel zone, and the bolt shaft tips of the plurality of first bolts are accommodated in the plurality of first through holes, and the second bolts are protruded from the second through holes. The first nut is screwed to the tip end portion, the edge surfaces of the column portion and the panel zone are welded to each other, and the plurality of first bolts formed in the plurality of first through holes and the end plate are joined. The positions of the plurality of third through holes into which the bolts are inserted are aligned, the first nut is rotated in the tightening direction , the plurality of first bolts penetrate the steel column and the end plate, and the plurality of first bolts It is characterized in that one bolt is tightened with a second nut.

According to the first beam-to-column connection structure of the present invention, the second bolt of the joint fitting has a longer bolt shaft than the first bolt, so the joint fitting is inserted into the hollow portion of the steel frame column, which is a square steel pipe, and the second bolt is inserted into the hollow portion of the steel frame column. By screwing the first nut onto the tip of the bolt shaft of the second bolt with only the tip of the bolt shaft of the bolt protruding to the outside of the hollow portion, the joint fitting can be temporarily fixed to the steel frame column. When the first nut is rotated in the tightening direction in this state, the first bolt fixed to the fixing plate can be horizontally moved in a direction approaching the plate portion forming one surface of the square steel pipe of the steel frame column. . Therefore, the joint fitting is temporarily fixed to the steel frame column in advance at the steel frame factory with only the second bolt protruding from the steel frame column, and the first nut is rotated in the tightening direction from the outside of the hollow portion at the construction site. Then, the fixing plate is brought close to the plate portion of the steel frame column, and the end plate fixed to the steel frame column and the steel frame beam is penetrated by the first bolt projecting outward from the hollow part, and the first bolt is tightened with a special nut. , the steel frame beam and the steel frame column can be easily joined without using special members or complicated processing, and workability can be improved.

According to the second beam-to-column joint structure of the present invention, the steel frame columns are welded together at the edge surfaces of the panel zones that join the column and the steel frame beams. By welding and joining the column and panel zone in a fixed state, the steel frame column with the joint metal fittings pre-installed can be brought into the construction site, and when joining steel frame columns and steel beams, which involves working in high places, Workers do not need to carry the bolts and plates that join the two members together to high places, so they can work safely.

According to the third beam-to-column connection structure of the present invention, the first bolt is fixed to the fixing plate by covering the bolt head with the fixing cover fixed to one plate surface of the fixing plate. It is possible to effectively prevent the first bolt from falling out of the fixing plate arranged in the hollow part of the steel frame column. In addition, the first bolt that joins the steel frame column and the steel frame beam is not fixed by welding to the fixing plate, but only the bolt head is covered by the fixing cover, so the strength and quality of the bolt are stabilized. can hold.

According to the fourth beam-to-column connection structure of the present invention, the second bolt is fixed by welding on one side of the fixing plate. , the welded portion does not interfere with the plate portion, and the fixing plate and the plate portion of the steel frame column can be accurately brought into contact with each other.

According to the fifth column-to-beam connection structure of the present invention, the first bolt includes a plurality of high-strength bolts having pintails formed at the tip of the bolt shaft, and a temporary bolt used for temporary assembly of the steel frame column and the steel frame beam. Therefore, just like general steel erection, temporary bolts are tightened with nuts to temporarily assemble steel frame columns and steel frame beams. A steel frame column and a steel frame beam can be joined by tightening the nut with a tool. Therefore, it is possible to significantly save labor in construction without using a special construction method or members.

According to the construction method of the first beam-to-column joint structure of the present invention, the first bolt of the joint fitting is caused to pass through the steel frame column and the end plate by rotating the first nut, and the first bolt protruding from the end plate. Since the steel frame column and the steel frame beam can be easily joined simply by tightening the second nut on the bolt shaft, the workability can be improved, and the increase in construction cost can be suppressed, resulting in an economically excellent joint. A method can be constructed.

Sectional drawing which shows a column-to-beam connection structure. FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1; BB line cross-sectional view of FIG. The perspective view which shows a steel-frame column and a steel-frame beam. (a) A perspective view showing a joint fitting, (b) A rear view showing a joint fitting and a fixed cover. (a) A sectional view showing a state in which only the second bolt protrudes to the outside of the hollow portion, (b) A sectional view showing a state in which the first bolt and the second bolt protrude to the outside of the hollow portion. (a) A cross-sectional view showing a state in which the joint fitting is inserted into the panel zone, (b) A cross-sectional view showing a state in which the column portion and the panel zone are welded together with the joint fitting temporarily fixed to the panel zone. Sectional drawing which shows the condition which arrange|positions a steel frame beam between a 2nd bolt from a horizontal direction. FIG. 4 is a cross-sectional view showing a state in which the first nut is rotated to project the first bolt to the outside of the hollow portion; (a) A cross-sectional view showing a state in which the temporary bolt is temporarily fixed, (b) A cross-sectional view showing a state in which the high-strength bolt is fully tightened. Sectional drawing which shows the steel-frame column which joins with a steel-frame beam in four directions.

EMBODIMENT OF THE INVENTION Hereinafter, it demonstrates, referring each figure for embodiment of the beam-to-column joint structure which concerns on this invention. As shown in FIGS. 1 to 3, the column-to-beam connection structure 1 of the present application includes a steel frame column 2 formed of square steel pipes, and a beam portion 32 formed of shaped steel with end plates 31 at the edges in the longitudinal direction. A structure that joins the fixed steel beams 3, and has a first bolt 41 that joins the steel frame column 2 and the end plate 31 and a second bolt 42 having a longer bolt axis than the first bolt 41, A joint fitting 4 to be inserted into the hollow portion S of the steel column 2 is provided.

The steel frame column 2 shown in FIG. 4 has a long column portion 21 each formed of a square steel pipe, and a panel zone 22 joined to the steel frame beam 3. The first edge surface 21a of the column portion 21 , and second edge faces 22a of the panel zone 22 are welded together (23). In addition, the panel zone 22 forms one surface of the square steel pipe, and has a first through hole 22c and a second through hole 22d penetrating the plate portion 22b joined to the steel frame beam 3 in the plate thickness direction. 4, the first bolts 41 are inserted into the first through holes 22c and the second bolts 42 are inserted into the second through holes 22d. can be inserted. The panel zone 22 is a member thicker than the column portion 21, and can be a general joint member that enables the steel frame column 2 and the steel frame beam 3 to be joined in a non-diaphragm manner. It varies depending on the size of the steel beams 3 to be joined. It is also possible to insert a through-diaphragm or the like into the connection between the column portion 21 and the panel zone 22 and weld them.

As shown in FIG. 4, the steel beam 3 is a horizontal member formed by fixing a plate-like end plate 31 to the longitudinal edge of a long beam 32 made of H-shaped steel. The end plate 31 is fixed to the beam portion 32 by welding with its plate surface perpendicular to the longitudinal direction of the beam portion 32. As shown in FIG. 2, a first bolt 41 protruding from the first through hole 22c can be inserted into the third through hole 31a. In addition, the end plate 31 is formed with a width smaller than the width of the plate portion 22b of the steel frame column 2, and is formed with the same height or higher than the beam height of the beam portion 32 whose size is calculated by the structural calculation. be. With such a shape, the entire plate surface of the end plate 31 can be brought into contact with the plate portion 22 b , and the steel frame column 2 and the end plate 31 can be firmly joined with the plurality of first bolts 41 . The hole diameters of the first through hole 22c of the steel frame column 2 and the third through hole 31a of the steel frame beam 3, into which the first bolts 41 are inserted, are obtained by adding a predetermined numerical value to the shaft diameter of the first bolt 41. As a result, when the steel frame column 2 and the steel frame beam 3 are joined with the first bolt 41, the joint strength between the two members 2 and 3 can be maintained at the required strength. In addition, although the beam portion 32 is formed of H-shaped steel in FIG. good.

As shown in FIGS. 2 and 5 , the joint fittings 4 are arranged above and below a plurality of first bolts 41 penetrating the steel frame column 2 and the steel frame beam 3 and the group of first bolts 41 . a second bolt 42 having a longer bolt shaft; and a fixing plate 43 that non-rotatably fixes the bolt head 41a of the first bolt 41 and one axial end of the second bolt 42 to one plate surface 43a. It is configured. The first bolt 41 is formed by a high-strength bolt 410 generally used for joining the steel frame column 2 and the steel frame beam 3, and a medium bolt (ordinary bolt) used for temporary assembly when erecting the steel frame. The number of high-strength bolts 410 calculated by structural calculation is used so that the joint strength of the steel frame column 2 and the steel frame beam 3 can be borne by the high-strength bolts 410 alone. be. The temporary bolts 411 are bolts that do not bear the joint strength of the steel-frame column 2 and the steel-frame beam 3, and the number of the temporary bolts 411 is not particularly limited as long as it is a number that enables temporary assembly of the steel-frame column 2 and the steel-frame beam 3. It is desirable to arrange a predetermined number of bolts 41 in a well-balanced manner with respect to the total number of bolts 41. With such a number, the steel frame column 2 and the steel frame beam 3 can be temporarily assembled without any trouble. In FIG. 5(a), the high-strength bolt 410 is a Torsia-type high-strength bolt having a pintail 410a formed at the tip thereof, but it may be a hexagonal high-strength bolt.

As shown in FIGS. 2 and 5, the second bolt 42 is a bolt having a longer bolt shaft than the first bolt 41, and is attached to the other end of the bolt shaft 42a passing through the panel zone 22 of the steel frame column 2. By screwing the 1 nut 5, the joint fitting 4 can be temporarily fixed to the plate portion 22b of the steel frame column 2. As shown in FIG. The material and strength of the second bolt 42 are not particularly limited as long as it is a bolt that can temporarily fix the joint fitting 4 to the steel frame column 2, and a medium bolt (ordinary bolt) or the like may be used. Although one second bolt 42 is arranged above and below the group of first bolts 41 in the illustrated example, the number of bolts is not particularly limited.

The fixing plate 43 is a flat plate, as shown in FIGS. Two second bolt holes 43c are formed. Further, as shown in FIG. 2, the second bolt hole 43c is located at a position avoiding the end plate 31 so that the hole is not buried by the end plate 31 when the steel frame beam 3 is brought into contact with the plate portion 22b of the steel frame column 2. is formed in

As shown in FIGS. 2 and 5, the first bolt 41 is inserted into the first bolt hole 43b from one plate surface 43a of the fixing plate 43 and is spot-welded (43d) to one plate surface 43a. The bolt head 41a is covered by the fixed cover 44, which is fixed to the fixed plate 43 so as to be non-rotatable. The second bolt 42 is inserted into the second bolt hole 43c and is It is welded (43e) from the plate surface 43a side and fixed to the fixing plate 43 so as not to rotate. The fixed cover 44 may be fixed by fillet welding to one plate surface 43a. In this way, by fixing the first bolt 41 and the second bolt 42 to the fixing plate 43 from one plate surface 43a side, both bolts 41 and 42 arranged in the hollow portion S of the panel zone 22 can be moved downward. It can prevent falling. Further, unlike the second bolt 42, the first bolt 41 is not welded and fixed to the fixing plate 43 by applying heat, so the strength and quality of the high-strength bolt 410 of the first bolt 41 can be maintained. The high-strength bolt 410 can bear the joint strength of the steel frame column 2 and the steel frame beam 3 without any problem. Since the fixing plate 43 and the fixing cover 44 do not bear the joint strength of the steel frame column 2 and the steel frame beam 3, the strength and plate thickness are limited as long as the first bolt 41 and the second bolt 42 can be held. The plate thickness and the plate thickness of the fixed cover 44 can be a thin metal plate that is thick enough to fix the bolts 41 and 42 .

As shown in FIG. 6(a), the metal joint 4 formed in this manner is attached to the hollow portion S of the panel zone 22 by inserting the second bolt 42 in a state in which the fixing plate 43 is separated from the plate portion 22b of the panel zone 22. As shown in FIG. When the first nut 5 is screwed onto the tip of the bolt shaft portion 42a and rotated in the tightening direction, as shown in FIG. The metal fitting 4 as a whole can be horizontally moved in the direction of the plate portion 22b. Therefore, when the first nut 5 is rotated from the outside of the hollow portion S, the bolt shaft 41b of the first bolt 41 fixed to the fixing plate 43 can be projected outside the hollow portion S to a desired position.

Next, a construction method for the beam-to-column joint structure 1 will be described. First, as shown in FIG. 7A, the joint fitting 4 is inserted into the hollow portion S of the panel zone 22 with the tips of the first bolt 41 and the second bolt 42 directed toward the plate portion 22b of the panel zone 22. do. Next, as shown in FIG. 7(b), the second bolt 42 is inserted into the second through-hole 22d to project the bolt shaft 42a, and the first bolt 41 is inserted into the first through-hole 22c. The joint fitting 4 is temporarily fixed to the panel zone 22 by screwing the first nut 5 onto the tip of the bolt shaft 42 a of the 2-bolt 42 . At this time, the fixing plate 43 is separated from the plate portion 22b, and the position of the joint fitting 4 is adjusted so that the tip of the bolt shaft 41b of the first bolt 41 does not protrude outside the outer surface 22e of the plate portion 22b. be. By performing such adjustment, breakage of the high-strength bolts 410 that bear the joint strength between the steel-frame column 2 and the steel-frame beam 3 during transportation of the steel-frame column 2 can be prevented. In addition, since the metal joint 4 is temporarily fixed to the panel zone 22, which is lower than the long column 21, rather than the long column 21, the metal joint 4 can be easily attached to the hollow portion through the upper and lower openings of the panel zone 22. It can be inserted into S, and the efficiency of temporary fixation work of the joint fitting 4 can be further improved.

Subsequently, as shown in FIG. 7B, the first edge surface 21a of the column portion 21 and the second edge surface 22a of the panel zone 22 are overlapped and welded (23), and the steel column 2 is joined. Form. The steps up to this point of forming the steel frame column 2 with the metal fittings 4 arranged in the hollow portion S are performed in a steel frame factory. At this time, since the first bolt 41 and the second bolt 42 are stably held by the fixing plate 43 and the fixing cover 44, they do not fall below the hollow portion S during transportation.

Next, the steel frame column 2 brought to the construction site is installed at a predetermined position, and the steel frame beam 3 is positioned horizontally between the upper and lower second bolts 42 as shown in FIG. Then, as shown in FIG. 9, the positions of the first through-hole 22c of the panel zone 22 and the third through-hole 31a of the end plate 31 are aligned with a chisel or the like, and the first nut 5 is rotated in the tightening direction, The joint fitting 4 is horizontally moved toward the plate portion 22b until the fixing plate 43 abuts against the inner side surface 22f of the plate portion 22b to project the first bolt 41 from the first through hole 22c and the third through hole 31a. At this time, as described above, the first bolt 41 is covered and fixed by the fixing cover 44 from one plate surface 43a side of the fixing plate 43, and the second bolt 42 is also fixed by welding on one plate surface 43a side. Therefore, both members 43 and 22b can be reliably brought into contact with each other without forming a gap between the fixing plate 43 and the plate portion 22b. It is possible to make the protruding length from the

Subsequently, as shown in FIG. 10( a ), the steel frame column 2 and the steel frame beam 3 are temporarily assembled by tightening the temporary bolt nut 6 only on the temporary bolt 411 among the first bolts 41 projecting from the end plate 31 . . Wire ropes are stretched on the temporarily assembled steel columns 2 and steel beams 3, and after rebuilding with lever blocks (registered trademark) or the like, as shown in FIG. 7 are screwed together, and final tightening is performed with a dedicated wrench (not shown) until the pintail 410a breaks. Thus, by using the high-strength bolt 410 as a Torsia-type high-strength bolt with a pintail 410a, it is possible to visually confirm whether or not the joint strength of the steel frame column 2 and the steel frame beam 3 has reached the required strength. While being able to improve constructability, construction quality can be maintained. Further, since the second bolt 42 is not structurally necessary as described above, after tightening the first bolt 41, it may be cut short by gas or the like if necessary if there is a problem in construction. Although the steel beam 3 is joined to the steel column 2 from only one direction in FIG. You may join from.

The column-to-beam joint structure 1 formed in this way allows the bolt shaft of the first bolt 41 to be rotated only by rotating the first nut 5 from the outside of the hollow portion S without using special members or complicated processing. 41b can be easily protruded to the outside of the steel frame column 2, and the steel frame column 2 and the steel frame beam 3 can be joined using common members and construction methods. In addition, since the beam-to-column joint structure 1 can be used regardless of the size of the steel frame column 2 or the steel frame column 3, the workability is improved and the increase in construction cost and member cost is suppressed, resulting in excellent economic efficiency. It can be a joint structure. Since it is not necessary to weld a joint member such as a bracket material to the steel frame column 2 as in the conventional art, the processing of the steel frame column 2 in the steel frame factory can be minimized, and the labor for manufacturing the steel frame column 2 can be saved. be able to. Furthermore, when joining the steel frame column 2 and the steel frame beam 3, which is work in high places, there is no need to carry members such as high-strength bolts and splice plates to high places, and workers can work easily and safely. .

The embodiments of the present invention are not limited to those described above, and can be modified as appropriate without departing from the spirit of the present invention.

INDUSTRIAL APPLICABILITY The column-to-beam joint structure according to the present invention can be suitably used when joining a steel-framed steel column and a steel-framed beam.

1 Column-beam connection structure 2 Steel frame column 21 Column portion 21a First edge surface (edge surface of column portion)
22 Panel Zone 22a Second Fore Side (Panel Zone Fore Side)
22b plate portion 22c first through hole 22d second through hole 3 steel beam 31 end plate 31a third through hole 32 beam portion 4 joint 41 first bolt 41a bolt head (of first bolt) 41b (of first bolt ) bolt shaft 410 high-strength bolt 410a pintail 411 temporary bolt 42 second bolt 42a (of the second bolt) bolt shaft 43 fixing plate 43a one plate surface 43b first bolt hole 43c second bolt hole 44 fixing cover 5 first nut 7 Second nut S Hollow part

Claims (6)

A beam-to-column joint structure that joins a steel frame column made of square steel pipes and a steel frame beam formed by fixing a flat plate-shaped end plate to the longitudinal edge of a long beam made of shaped steel. There is
a plurality of first bolts penetrating and joining the steel frame column and the end plate; a second bolt having a longer bolt shaft than the plurality of first bolts; bolt heads of the plurality of first bolts; a flat fixing plate that non-rotatably fixes one axial end of two bolts to one plate surface, and is inserted into the hollow part of the steel frame column;
Only the bolt shaft of the second bolt protrudes outside the outer surface of the steel frame column from a position avoiding the end plate, and a first nut is screwed to the tip of the bolt shaft protruding from the steel frame column. a temporary fixing mechanism for temporarily fixing the joint fitting to the steel frame column;
By rotating the first nut of the joint fitting temporarily fixed to the steel frame column in the tightening direction , the fixing plate is moved until the other plate surface comes into contact with the inner surface of the steel frame column. a moving mechanism that moves and penetrates the plurality of first bolts through the steel frame column and the end plate;
The steel frame column and the end plate are joined together by screwing onto the bolt shafts of the plurality of first bolts that pass through the steel frame column and the end plate and protrude outward from the outer surface of the steel frame column . 2 nuts, and a beam-to -column joint structure. The steel frame column is a member formed by welding and joining the end faces of a long column part formed of a square steel pipe and a panel zone joined to the steel frame beam,
In the panel zone, a plate portion forming one surface of a square steel pipe is formed with a plurality of first through holes into which the plurality of first bolts are inserted and a second through hole into which the second bolts are inserted. The column-to-beam joint structure according to claim 1. the plurality of first bolts are respectively inserted into a plurality of first bolt holes formed in the fixing plate;
3. The pillar according to claim 1, wherein the bolt head is fixed to the fixing plate by being covered with a fixing cover fixed to the one plate surface of the fixing plate. beam joint structure. The second bolt is inserted into a second bolt hole formed in the fixing plate,
The column-to-beam joint structure according to any one of claims 1 to 3, wherein said one plate surface side of said fixing plate is welded and fixed to said fixing plate. 2. The plurality of first bolts include a plurality of high-strength bolts having pintails formed at their tips, and temporary bolts used for temporary assembly of the steel frame column and the steel frame beam. The column-to-beam joint structure according to any one of claims 4 to 4. A method for constructing a beam-to-column connection structure for connecting the steel frame beam and the steel frame column using the beam-to-column connection structure according to claim 2,
The joint metal fitting is inserted into the hollow portion of the panel zone, and the bolt shaft tips of the plurality of first bolts are accommodated in the plurality of first through holes, respectively, and the second bolts are inserted into the second through holes. The first nut is screwed to the tip part by protruding from
Welding and joining the edge surfaces of the column and the panel zone,
The positions of the plurality of first through-holes and the plurality of third through-holes formed in the end plate into which the plurality of first bolts are inserted are aligned, and the first nut is rotated in the tightening direction. While penetrating the steel column and the end plate with the first bolt of
A method for constructing a column-to-beam joint structure, comprising tightening each of the plurality of first bolts with a second nut.

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