JP2020122362A - Column-beam joint structure and construction method for column-beam joint structure - Google Patents

Abstract

To provide a column-beam joint structure that easily joints a steel beam and a steel column by using a general member without performing special processing, and a construction method using the column-beam joint structure.SOLUTION: A column-beam joint structure 1 is the structure that joints a panel zone 22 jointed to a column part 21 formed by a rectangular steel tube and a steel beam 3 constituted to fix a tabular end plate 31 at a longitudinal edge of a long beam part 32 formed with shaped steel. The column-beam joint structure comprises a joint metal fixture 4 that is formed by fixing bolt heads 41a of first bolts 41 penetrating the panel zone 22 and the end plate 31 to joint them and one end part of second bolts 42 having longer bolt axes than the first bolts 41 in an axial direction onto the plate surface of a tabular fixed plate 43 in non-rotatable manner, and that is inserted to a hollow part S of the panel zone 22. The second bolts 42 protrude bolt axes 42a from positions avoiding the end plate 31 to outsides of the hollow part S, and screw first nuts 5 to the bolt axes 42a protruded from the panel zone 22.SELECTED DRAWING: Figure 2

Description

TECHNICAL FIELD The present invention relates to a beam-column joining structure for joining a steel beam made of shaped steel to a steel column made of a rectangular steel pipe, and a construction method thereof.

Generally, the beam-column joint of a rigid frame structure composed of a steel beam made of H-shaped steel and a steel beam column made of square steel pipe is performed by joining the steel beam to the vertical surface of the steel beam column in advance. The mainstream method is to weld the bracket material of (1) at a steel frame factory, and sandwich the flange and web of the steel beam and the bracket material with a splice plate at the construction site to perform high strength bolt connection. However, in this joining method, since the bolt head of the high-strength bolt projects from the upper surface of the steel beam, horizontal plane materials such as the ALC panel installed on the beam and the deck plate that receives the floor slab interfere with the high-strength bolt during work. There is a problem that efficiency is reduced. Further, since the bracket material is welded in the steel frame factory so as to project from the vertical surface of the steel column, there is a problem that the carrying efficiency is poor due to the projection of the bracket material during transportation. Therefore, a column-beam joining method has been invented, in which the joining position of the high-strength bolt is devised, and the bracket material is eliminated and the end plate of the beam is directly attached to the panel zone.

For example, in the invention described in Patent Document 1, a tap screw hole having an internal thread formed on the inner peripheral surface is formed in the steel frame in advance, and a locking plate is fixed to the longitudinal edge of the steel beam. The steel plate and the steel beam are joined by abutting the stop plate on the vertical surface of the steel frame column and connecting the one side bolt to the through hole and tap screw hole formed in the locking plate and rotating in the tightening direction. Points are disclosed. According to the present invention, 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, so that the transportation efficiency and the workability can be improved.

Further, in the inventions described in Patent Documents 2 and 3, a general high-strength bolt is set in the hollow portion of the steel frame column, and the bolt shaft of the high-strength bolt is projected outward from the through hole formed in the steel frame column. Described about jigs. In the present invention, it is possible to easily join the steel column and the steel beam simply by screwing the nut onto the bolt shaft projecting to the outside of the hollow portion and tightening it without adding complicated processing to the steel column or the steel beam. Therefore, the workability can be improved.

Actual Kaisho 60-158010 JP 2000-213070 A Japanese Patent Laid-Open No. 9-96015

However, the invention described in Patent Document 1 requires a special process of forming a tapped screw hole in the steel frame column in advance, which raises a problem that the production is complicated and the production cost is increased. Also, instead of the commonly used high-strength bolts such as hexagonal high-strength bolts and torcia-type high-strength bolts, special bolts called one-sided bolts are used. It has the demerit that it cannot be used at the construction site unless it is certified by the Minister of Land, Infrastructure, Transport and Tourism. And although the invention of patent document 2 and patent document 3 can join a steel frame pillar and a steel frame beam using a general member, the structure of the jig which arrange|positions a high strength bolt in the hollow part of a steel frame pillar. Since the operation is complicated and the operation is complicated, it takes time for an operator who is unfamiliar with the operation of the jig to align the high-strength bolt with the through hole formed in the steel column, which may reduce the work efficiency.

Therefore, the present invention has been made in view of the above-mentioned problems, and does not perform special processing on a steel beam or a steel column, and easily joins the steel beam and the steel column using a general member. An object of the present invention is to provide a column-beam joint structure and a construction method using the column-beam joint structure.

The first column-beam joint structure of the present invention is configured by fixing a steel frame column formed of a rectangular steel tube and a flat plate-shaped end plate to the longitudinal edge of a long beam portion formed of a section steel. A beam-column joint structure for joining a steel beam and a beam, wherein the bolt head of the first bolt penetrates through the steel column and the end plate to join, and a second bolt having a bolt axis longer than the first bolt. An end portion in the axial direction of the end plate is fixed to a plate surface of a flat plate-like fixed plate so as not to rotate, and is provided in a hollow portion of the steel column, and the second bolt includes the end plate. The bolt shaft is projected from the position avoiding the above to the outside of the hollow portion, and the first nut is screwed onto the bolt shaft projected from the steel column.

In the second beam-column joining structure of the present invention, the steel frame column is a member in which the forefront surfaces of the long column portions each formed of a rectangular steel pipe and the panel zone for joining the steel beam beams are connected to each other. The panel zone is characterized in that a plate portion forming one surface of a rectangular steel pipe is formed with a first through hole into which the first bolt is inserted and a second through hole into which the second bolt is inserted. There is.

In the third post-beam joint structure of the present invention, the first bolt is inserted into a first bolt hole formed in the fixing plate, and a bolt bolt head is fixed to one plate surface of the fixing plate. It is characterized in that it is fixed to the fixed plate by being covered with a fixed cover.

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

In a fifth beam-column joining structure according to the present invention, the first bolt is a plurality of high-strength bolts having pin tails formed at a tip portion thereof, and a temporary bolt used for temporary assembly of the steel column and the steel beam. It is characterized by having.

A first method of constructing a beam-column joint structure according to the present invention uses a beam-column joining structure according to any one of the first to fifth aspects of a beam-column joining structure for joining the steel beam and the steel beam column. A construction method, wherein the joining metal fitting is inserted into the hollow portion of the panel zone, the second bolt is projected from the second through hole, and the first nut is screwed into the tip portion, and the pillar portion and The small surfaces of the panel zone are welded to each other, and the positions of the first through hole and the third through hole into which the first bolt formed in the end plate is inserted are aligned to rotate the first nut. The steel bolt and the end plate are penetrated by the first bolt, and the first bolt is tightened by a second nut.

According to the first beam-column joint structure of the present invention, since the second bolt of the joint fitting has a longer bolt shaft than the first bolt, the joint fitting is inserted into the hollow portion of the steel column, which is a rectangular steel pipe, and When the first nut is screwed onto the bolt shaft tip of the second bolt while only the bolt shaft tip of the bolt is projected to the outside of the hollow portion, the joint fitting can be temporarily fixed to the steel 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 the direction approaching the plate portion forming one surface of the rectangular steel pipe of the steel column. .. Therefore, at the steel frame factory, the joining bracket is temporarily fixed to the steel frame column with only the second bolt protruding from the steel frame column in advance, and the first nut is rotated in the tightening direction from the outside of the hollow part at the construction site. By fixing the fixing plate close to the plate portion of the steel frame pillar, and by penetrating the end plate fixed to the steel frame pillar and the steel beam with the first bolt protruding outward from the hollow portion, and tightening the first bolt with the dedicated nut. The steel beam and the steel column can be easily joined without using a special member or complicated processing, and the workability can be improved.

According to the second beam-column joining structure of the present invention, since the steel frame column is obtained by welding and joining the foremost faces of the panel zone for joining the column portion and the steel beam, the joining metal fitting is temporarily attached to the hollow portion of the panel zone. By welding and joining the pillar and panel zone in a fixed state, it is possible to carry in the steel frame column with the built-in joining metal fittings in advance to the construction site, and at the time of joining work of the steel frame column and the steel beam, which is a high place work, Unlike the conventional case, it is not necessary for an operator to carry bolts and plates for joining both members to a high place, and it is possible to perform work safely.

According to the third beam-column joint structure of the present invention, the first bolt is fixed to the fixed plate by covering the bolt head on the fixed cover fixed to one plate surface of the fixed plate. It is possible to effectively prevent the first bolt from falling off from the fixing plate arranged in the hollow portion of the steel frame column. Further, the first bolt that joins the steel column and the steel beam is not welded and fixed to the fixing plate, but only the head of the bolt is covered by the fixing cover, so that the strength and quality of the bolt can be stabilized. Can be held.

According to the fourth beam-column joining structure of the present invention, since the second bolt is welded and fixed on one plate surface side of the fixing plate, the first nut is rotated to move the fixing plate to the plate portion of the steel frame pillar. The welded portion does not interfere with the plate portion even when the fixed plate and the plate portion of the steel frame pillar are brought into contact with each other with high accuracy.

According to the fifth beam-column joining structure of the present invention, the first bolt is a plurality of high-strength bolts having pin tails formed at the tip of the bolt shaft, and a temporary bolt used for temporarily assembling the steel column and the steel beam. Since it has, as in the case of general steel frame construction, the temporary bolts are tightened with nuts to temporarily assemble the steel columns and steel beams, and after the re-installation, the high-strength bolts are dedicated until the pin tail breaks. Steel columns and steel beams can be joined by tightening the nuts with a tool. Therefore, it is possible to achieve significant labor saving without using a special construction method or member.

According to the first method of constructing a beam-column joint structure of the present invention, the first nut is rotated to allow the first bolt of the joint fitting to penetrate the steel frame column and the end plate, and the first bolt protruding from the end plate. Since it is possible to easily join the steel frame column and the steel beam by simply tightening the second nut on the bolt shaft, the workability can be improved, and the construction cost can be suppressed and the economically excellent joining can be achieved. A method can be built.

Sectional drawing which shows a beam-column joint structure. Sectional view on the AA line of FIG. 1. The BB sectional view taken on the line of FIG. The perspective view which shows a steel frame pillar and a steel frame beam. (A) The perspective view which shows a joining metal fitting, (b) The rear view which shows a joining metal fitting and a fixed cover. (A) Sectional drawing showing the state where only the 2nd bolt was made to project outside the hollow part, (b) Sectional drawing showing the state where the 1st bolt and the 2nd bolt were made to project outside the hollow part. (A) Sectional drawing which shows the situation which inserts a joining metal fitting in a panel zone, (b) Sectional drawing which shows the state which welded and joined the column part and panel zone in the state which fixed the joining metal fitting to a panel zone. Sectional drawing which shows the condition which arrange|positions a steel frame beam between a 2nd bolt from a horizontal direction. Sectional drawing which shows the state which carried out the rotation operation of the 1st nut and made the 1st bolt project outside the hollow part. (A) Sectional drawing which shows the situation which temporarily fixed the temporary bolt, (b) Sectional drawing which shows the situation where the high strength bolt was finally tightened. Sectional drawing which shows the steel frame column joined with a steel frame beam in four directions.

Hereinafter, embodiments of a beam-column joint structure according to the present invention will be described with reference to the drawings. As shown in FIGS. 1 to 3, the column-beam joint structure 1 of the present application has a steel frame column 2 formed of a square steel tube, and an end plate 31 at a longitudinal edge of a beam portion 32 formed of a section steel. A structure for joining the fixed steel beam 3 and a first bolt 41 for joining the steel column 2 and the end plate 31 and a second bolt 42 having a bolt axis longer than the first bolt 41. The metal fitting 4 to be inserted into the hollow portion S of the steel column 2 is provided.

The steel column 2 shown in FIG. 4 has a long column portion 21 formed of a rectangular steel pipe, and a panel zone 22 joined to the steel beam 3, and the first foreground surface 21 a of the column portion 21. , And the second small surface 22a of the panel zone 22 is a vertical member formed by fusion welding joining (23). Further, the panel zone 22 forms one surface of the rectangular steel pipe, and the first through hole 22c and the second through hole 22d penetrating in the plate thickness direction in the plate portion 22b joined to the steel frame beam 3 are joined metal fittings shown in FIG. The first bolts 41 and the second bolts 42 are formed by the number corresponding to the number of the four bolts 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 having a plate thickness thicker than that of the column portion 21, and can be a general joint member capable of joining the steel frame column 2 and the steel frame beam 3 in a non-diaphragm type, and its height is It depends on the size of the steel beam 3 to be joined. Further, it is possible to insert a diaphragm or the like into the connection between the column portion 21 and the panel zone 22 and perform welding.

As shown in FIG. 4, the steel beam 3 is a horizontal member in which a plate-shaped end plate 31 is fixed to a longitudinal edge of a long beam portion 32 made of H-shaped steel. The end plate 31 is fixed to the beam portion 32 by welding in a state where the plate surface is orthogonal to the longitudinal direction of the beam portion 32, and is located at a position aligned with the first through hole 22c of the steel frame column 2 in the plate thickness direction. A third through hole 31a penetrating to the first through hole 31a is formed. As shown in FIG. 2, the first bolt 41 protruding from the first through hole 22c can be inserted into the third through hole 31a. Further, the end plate 31 is formed with a width smaller than the width of the plate portion 22b of the steel column 2, and is formed with the same or higher height than the beam diameter of the beam portion 32 whose size is calculated by the structural calculation. It With such a shape, the entire plate surface of the end plate 31 can be brought into contact with the plate portion 22b, and the steel column 2 and the end plate 31 can be firmly joined by the plurality of first bolts 41. The hole diameter of the first through hole 22c of the steel frame column 2 into which the first bolt 41 is inserted and the third through hole 31a of the steel frame beam 3 are the hole diameters obtained by adding a predetermined numerical value to the shaft diameter of the first bolt 41. With this configuration, when the steel frame column 2 and the steel frame beam 3 are joined with the first bolt 41, the joining strength between the members 2 and 3 can be maintained at a required strength. Although the beam portion 32 is formed of H-shaped steel in FIG. 4 and the like, it is not particularly limited, and may be formed of shaped steel of other shapes such as L-shaped steel and C-shaped steel. Good.

As shown in FIGS. 2 and 5, the joint fitting 4 is arranged above and below the plurality of first bolts 41 that penetrate the steel frame columns 2 and the steel frame beams 3, and the first bolt 41 group. Also, a second bolt 42 having a long bolt shaft, and a fixing plate 43 for fixing the bolt head 41a of the first bolt 41 and one axial end of the second bolt 42 to one plate surface 43a so as not to rotate. It is configured. The first bolt 41 is formed of a high-strength bolt 410 that is generally used to join the steel column 2 and the steel beam 3 and a medium bolt (ordinary bolt) that is used for temporary assembly during steel frame construction. The high-strength bolt 410 has the number of temporary bolts 411, and the number calculated by the structural calculation is used so that the high-strength bolt 410 alone can bear the joint strength of the steel column 2 and the steel beam 3. It The temporary bolts 411 are bolts that do not bear the joint strength between the steel frame columns 2 and the steel beam 3, and the number thereof is not particularly limited as long as it is a number that enables temporary assembly of the steel frame columns 2 and the steel beam 3. It is desirable to arrange a predetermined number of the 1 bolts 41 in a well-balanced manner with respect to the total number of bolts. With such a number, the temporary assembly of the steel column 2 and the steel beam 3 can be carried out without trouble. Note that, in FIG. 5A, the torcia-type high-strength bolt in which the pin tail 410a is formed at the tip of the high-strength bolt 410 is used, 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 described later at the other end of the bolt shaft 42 a that penetrates the panel zone 22 of the steel column 2. The joint fitting 4 can be temporarily fixed to the plate portion 22b of the steel frame column 2 by screwing the 1 nut 5. The second bolt 42 is not particularly limited in material and strength as long as it can temporarily fix the joint fitting 4 to the steel column 2, and a medium bolt (ordinary bolt) or the like may be used. In the illustrated example, one second bolt 42 is arranged above and below the first bolt 41 group, but the number thereof is not particularly limited.

As shown in FIGS. 2 and 5, the fixing plate 43 is a flat plate-shaped plate, and has a plurality of first bolt holes 43b for inserting the first bolts 41 and two holes for inserting the second bolts 42. Two second bolt holes 43c are formed. 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 in the end plate 31 when the steel beam 3 is brought into contact with the plate portion 22b of the steel 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 side of the fixing plate 43, and spot welded (43d) to the one plate surface 43a. The fixed cover 44 is covered with the bolt head 41a so as to be fixed to the fixed plate 43 in a non-rotatable manner. Further, the second bolt 42 is inserted into the second bolt hole 43c and one end of The plate surface 43a is welded and joined (43e) to the fixed plate 43 so as not to rotate. The fixed cover 44 may be fixed to the one plate surface 43a by fillet welding. In this way, by fixing the first bolt 41 and the second bolt 42 to the fixing plate 43 from the one plate surface 43a side, the two bolts 41, 42 arranged in the hollow portion S of the panel zone 22 are moved downward. It can be prevented from 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 that the strength and quality of the high-strength bolt 410 of the first bolt 41 can be maintained. Therefore, the high-strength bolt 410 can bear the joint strength between the steel frame column 2 and the steel frame beam 3 without any problem. Since the fixed plate 43 and the fixed cover 44 do not bear the joint strength of the steel column 2 and the steel beam 3, the strength and the plate thickness thereof are limited as long as the first bolt 41 and the second bolt 42 can be held. However, the plate thickness of the fixed cover 44 and the plate thickness of the fixed cover 44 can be a thin metal plate as long as the bolts 41 and 42 can be fixed.

As shown in FIG. 6A, in the joint fitting 4 thus formed, the second bolt 42 is moved into the hollow portion S of the panel zone 22 in a state where the fixing plate 43 is separated from the plate portion 22b of the panel zone 22. From the second through hole 22d toward the outside, and the first nut 5 is screwed into the tip end portion of the bolt shaft portion 42a and rotated in the tightening direction, as shown in FIG. 6(b). The entire metal fitting 4 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 to the outside of the hollow portion S to a desired position.

Then, the construction method of the beam-column joint structure 1 will be described. First, as shown in FIG. 7A, the 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 facing the plate portion 22b of the panel zone 22. To do. Next, as shown in FIG. 7B, 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 first nut 5 is screwed onto the tip of the bolt shaft 42 a of the 2 bolt 42 to temporarily fix the joint fitting 4 to the panel zone 22. At this time, the fixing plate 43 is separated from the plate portion 22b, and the position of the joining metal fitting 4 is adjusted so that the tip of the bolt shaft 41b of the first bolt 41 does not project outside the outer surface 22e of the plate portion 22b. It By performing such an adjustment, it is possible to prevent damage to the high-strength bolt 410 that bears the joint strength between the steel frame column 2 and the steel frame beam 3 during transportation of the steel frame column 2. Further, since the joining metal fitting 4 is temporarily fixed to the panel zone 22 having a height lower than that of the pillar portion 21 instead of the long pillar portion 21, the joining metal fitting 4 can be easily opened from the upper and lower openings of the panel zone 22. Since it can be inserted into S, the efficiency of the temporary fixing work of the joining metal fitting 4 can be further improved.

Subsequently, as shown in FIG. 7( b ), the first edge surface 21 a of the column portion 21 and the second edge surface 22 a of the panel zone 22 are overlapped and weld-welded (23) to form the steel column 2. Form. The steps up to this point of forming the steel frame pillar 2 with the joining metal fitting 4 arranged in the hollow portion S are performed in a steel frame factory. Further, at this time, the first bolt 41 and the second bolt 42 are stably held by the fixing plate 43 and the fixing cover 44, and therefore do not fall below the hollow portion S during transportation.

Next, the steel-framed column 2 carried into the construction site is installed at a predetermined position, and as shown in FIG. 8, the steel-framed beam 3 is arranged so as to be located between the upper and lower second bolts 42 in the horizontal direction. Then, as shown in FIG. 9, the positions of the first through holes 22c of the panel zone 22 and the third through holes 31a of the end plate 31 are aligned with a pin or the like to rotate the first nut 5 in the tightening direction, The fitting 4 is horizontally moved in the direction of the plate 22b until the fixing plate 43 contacts the inner surface 22f of the plate 22b, and the first bolt 41 is projected 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 the one plate surface 43a side of the fixing plate 43, and the second bolt 42 is also welded and fixed on the one plate surface 43a side. Therefore, both members 43, 22b can be surely brought into contact with each other without forming a gap between the fixed plate 43 and the plate portion 22b, and the third through holes 31a of the plurality of first bolts 41 are formed. The protrusion length from can be made uniform.

Subsequently, as shown in FIG. 10A, the provisional bolt nut 6 is tightened only on the provisional bolt 411 among the first bolts 41 protruding from the end plate 31 to provisionally assemble the steel column 2 and the steel beam 3. .. After wire ropes are stretched on the temporarily assembled steel frame columns 2 and steel beam 3 and re-installation is performed with a lever block (registered trademark), etc., as shown in FIG. 7 is screwed in, and is fully tightened with a dedicated wrench (not shown) until the pin tail 410a is broken. As described above, by using the high-strength bolt 410 as the torcia-type high-strength bolt with the pin tail 410a, it is possible to visually confirm whether or not the joint strength between the steel column 2 and the steel beam 3 has reached the required strength. The workability can be improved and the work quality can be maintained. Further, since the second bolt 42 is not a structurally necessary bolt as described above, after tightening the first bolt 41, if there is a construction problem, the second bolt 42 may be cut short with gas or the like if necessary. 3 and the like, the steel beam 3 is joined to the steel column 2 only from one direction, but the steel beam 3 is joined to the steel column 2 from two or three directions, or as shown in FIG. You may join from.

The column-beam joint structure 1 formed in this way does not use a special member or complicated processing, and only by rotating the first nut 5 from the outside of the hollow portion S, the bolt shaft of the first bolt 41 is formed. 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 a general member or a construction method. Moreover, since the beam-column joint structure 1 can be used regardless of the size of the steel frame columns 2 and 3, the workability is improved and the construction cost and the member cost are suppressed from increasing, which is excellent in economic efficiency. Can be a joined structure. Since it is not necessary to weld a joining member such as a bracket material to the steel column 2 as in the conventional case, the processing of the steel column 2 in a steel frame factory can be minimized, and the labor of manufacturing the steel column 2 is saved. be able to. Further, it is not necessary to carry members such as high-strength bolts and splice plates to a high place when joining the steel columns 2 and the steel beams 3 which is a high place work, and the worker can easily and safely perform the work. ..

The embodiment of the present invention is not limited to the above-described embodiment, and can be appropriately modified without departing from the scope of the idea of the present invention.

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

1 Column-beam connection structure 2 Steel column 21 Column part 21a 1st fore edge surface (fore edge surface of column part)
22 panel zone 22a second edge (edge of panel zone)
22b Plate part 22c First through hole 22d Second through hole 3 Steel beam 31 End plate 31a Third through hole 32 Beam part 4 Joining metal fitting 41 First bolt 41a (First bolt) Bolt head 41b (First bolt) ) Bolt shaft 410 High-strength bolt 410a Pin tail 411 Temporary bolt 42 Second bolt 42a (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 column-beam joint structure that joins a steel column made of square steel pipe and a steel beam made by fixing a flat end plate to the longitudinal edge of a long beam section made of shaped steel. There
The bolt head of the first bolt that penetrates and joins the steel column and the end plate, and the axial end of the second bolt having a bolt axis longer than the first bolt has a plate surface of a flat plate-shaped fixing plate. A non-rotatably fixed member, which is provided with a joint fitting to be inserted into the hollow portion of the steel frame pillar,
The second bolt projects the bolt shaft from a position avoiding the end plate to the outside of the hollow portion, and has a first nut screwed onto the bolt shaft projected from the steel column. Column-beam connection structure. The steel frame column is a member formed by welding and joining the forefront surfaces of a long column portion formed of a rectangular steel pipe, and a panel zone joined to the steel frame beam,
The panel zone is formed with a first through hole into which the first bolt is inserted and a second through hole into which the second bolt is inserted, in a plate portion forming one surface of a rectangular steel pipe. The column-beam joint structure according to 1. The first bolt is inserted into a first bolt hole formed in the fixing plate,
The column beam according to claim 1 or 2, wherein the bolt head is fixed to the fixing plate by being covered with a fixing cover fixed to one plate surface of the fixing plate. Junction structure. The second bolt is inserted into a second bolt hole formed in the fixing plate,
The beam-column joint structure according to any one of claims 1 to 3, wherein the one plate surface side of the fixing plate is welded and fixed to the fixing plate. The first bolt includes a plurality of high-strength bolts each having a pin tail formed at a tip portion thereof, and a temporary bolt used for temporarily assembling the steel column and the steel beam. The beam-column joint structure according to any one of Items 4. A method of constructing a beam-column joint structure for joining the steel beam and the steel column using the beam-column joint structure according to any one of claims 2 to 5.
Inserting the joining metal fitting into the hollow portion of the panel zone, projecting the second bolt from the second through hole, and screwing the first nut into the tip portion;
Welding and joining the foremost surfaces of the column portion and the panel zone,
The first nut is rotated by aligning the position of the third through hole into which the first bolt is formed, which is formed in the first through hole and the end plate, and the first bolt rotates the steel column and the end. While penetrating the plate,
A method for constructing a beam-column joint structure, comprising fastening the first bolt with a second nut.

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