JPH05179702A - Column-beam connected structure - Google Patents

Abstract

PURPOSE:To permit many columns to be transported at a time without bulking and also columns to be prefabricated in non-directive way as well as enable general high-power bolts to be used for column-beam connected structures of Rahmen structure. CONSTITUTION:A joint box 1 is made up of upper and lower plates 6 and 7 and four side plates 8 and openings 10 are formed in the corners of the sides. The side plate 8 has a bolt hole 12, and the plates 6 and 7 are welded to the upper and lower columns 6 and 7. In the beam 4, end plates 5 are lapped on the side plates 8 and rigid-connected to the box 1 with a friction bolt-connected structure by high-power bolts and nuts. The high-power bolt is inserted from the opening 10 into the bolt hole 12 of the plates 8. A reinforcing plate 11 is preferably provided in the box 1 to prevent the shear deformation of the side plates 8 in parallel with the beam 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a column-beam joint structure in a steel frame structure.

[0002]

2. Description of the Related Art Conventionally, when a beam made of H-shaped steel is rigidly joined to a square steel tube column, a bracket 73 made of H-shaped steel having the same cross section as the beam 72 is welded to the column 71 in advance at a factory as shown in FIG. In addition, the beam 72 is attached to the bracket 73 by the attachment plate 74.
And the high-strength bolts 75 are used for friction bolt joining.

[0003]

However, the bracket 7
Since 3 projects, the directionality of the pillars 71 arises, so that there is a problem that prefabrication is difficult to perform in a building in which the required direction of the bracket 73 differs for each floor. In addition, during transportation, the bracket 73 having the H-shaped cross section is not supported by the pillar 71.
It is bulky because it sticks out of it and can't carry much at once. Moreover, since it is necessary to bolt the bracket 73 and the beam 72 with the splicing plate 74 at the web portion and the upper and lower flange portions in order to secure the strength, the number of bolts is increased, and the bolt tightening work in the field is difficult. There is a problem that man-hours increase.

Incidentally, in a building such as a light-weight steel frame, a structure in which a column and a beam are joined by using a joint box is also adopted. The structure is such that the bolt is screwed into the screw hole or the welding nut formed in the joint box from the outside. Therefore, friction bolts cannot be joined using commercially available high-strength bolts, and it is difficult to perform firm joining.

The object of the present invention is to make prefabrication easy because there is no orientation of the pillars, it is not bulky at the time of transportation, many pillars can be transported at one time, and general high-strength bolts can be used. The purpose is to provide a column-beam joint structure that requires less.

[0006]

A column-beam joint structure according to the present invention has a shape in which a joint box has side plates on four side surfaces between an upper plate and a lower plate, and openings are formed at corners of the side surfaces. It is what Bolt insertion holes are provided in the side plate. The upper plate and the lower plate of the joint box are joined to the upper and lower columns by welding or the like. In the beam, an end member such as an end plate is bolted to the side plate at the bolt insertion hole.

The column-beam joint structure according to a second aspect of the present invention is the structure of the first aspect, in which two adjacent side plates are each constituted by one L-shaped bending plate, and the side plates are horizontal. It is provided with a reinforcing plate. The opening at the corner of the joint box is formed between the ends of the two bending plates.

According to a third aspect of the present invention, in the construction of the first aspect, a plurality of horizontal reinforcing plates are provided inside the joint box, and the height positions of these reinforcing plates are joined to the side plates. The positions are approximately the same as the upper and lower flanges of the steel beam.

According to a fourth aspect of the present invention, there is provided a beam-column joint structure according to the first aspect, in which the corner openings of the joint box are provided at two positions vertically separated from each other, and the lower end of the upper opening and the upper end of the lower opening are provided. At the position, a horizontal reinforcing plate is provided inside the joint box.

[0010]

According to the structure of the present invention, since the corner portion of the joint box has an opening, it is possible to insert a bolt from the inside into the bolt hole of the side plate by putting a hand through this opening. Therefore, a commercially available normal high-strength bolt can be used for joining the beams, and a rigid joint can be formed by friction bolt joining. In the case of prefabrication, a method is used in which a joint box is joined to a column by welding or the like in advance at a factory, and a beam is joined on site. In this case, the joint box does not significantly project from the column, and there is no protrusion on the column, so that it is not bulky during transportation. In addition, the joint box can connect the beams in each direction only by providing the bolt insertion holes on the four side surfaces, and the directionality of the columns is lost. Therefore, the number of pillars does not increase, and it is easy to build a prefabricated building.

In the case of the second aspect of the invention, since each of the two side plates is composed of two L-shaped bending plates, the number of parts is small and the manufacturing is easy. Further, the rigidity of the joint box is increased by the reinforcing plate.

According to the third aspect of the present invention, since the reinforcing plate is located in the joint box at the height of the upper and lower flanges of the beam, the upper flange and the lower flange of the pair of beams joined to both sides of the joint box. In the meantime, horizontal force is transmitted through the reinforcing plate. Therefore, the reinforcing plate is integrated with the side plates to provide rigidity against the force of shearing the side plates parallel to the beams of the joint box due to the horizontal forces acting on the upper and lower flanges of the beams in mutually opposite directions. Higher to make shear deformation less likely to occur.

In the structure of claim 4, the horizontal force transmission between the upper flanges of the pair of beams joined to both sides of the joint box is distributed to the reinforcing plate and the upper plate at the lower end of the upper opening. And the transmission of horizontal force between the lower flanges is
It is performed in a distributed manner on the reinforcing plate and the lower plate at the upper end of the lower opening. Therefore, also in this configuration, the reinforcing plate is integrated with the side plate to increase the rigidity, and the side plate is prevented from being sheared and deformed by the horizontal forces acting on the upper and lower flanges of the beam in mutually opposite directions as described above. To be done. In particular, the portion between the upper and lower reinforcing plates has a box shape with no opening, so that the rigidity is further enhanced. When H-section steel is used as the beam, it is preferable to connect the beam to the beam by bolts near the upper and lower flanges of the beam. Since it is not necessary to connect the intermediate part to the beam, bolts can be used even if no opening is provided in the intermediate part. No hindrance to the joining work.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. This column-beam joint structure is a structure in which a joint box 1 is joined between upper and lower columns 2 and 3, and an end plate 5 of a beam 4 is joined to the joint box 1 by a high-strength bolt.

The joint box 1 includes an upper plate 6
Between the lower plate 7 and the lower plate 7, four side surface plates 8 are provided, and openings 10 are provided at the corners of the side surfaces.
Each of the side plates 8 is formed by two adjacent bent plates 9 each having an L shape (FIG. 2), and is welded to the upper plate 6 and the lower plate 7, respectively. The opening 10 is
It is formed between the two bent plates 9, 9. In the joint box 1, two horizontal reinforcing plates 11 are welded to the surrounding side plate 8 at appropriate height positions. A bolt insertion hole 12 is provided in each side plate 8, and a bolt insertion hole 13 matching the bolt insertion hole 12 is formed in the end plate 5 of the beam 4.

The upper plate 6 and the lower plate 7 of the joint box 1 are factory welded to the upper and lower columns 2 and 3, respectively. The beam 4 is constructed by stacking the end plate 5 on the side plate 8 of the joint box 1 as shown in FIG. 2, and inserting the high-strength bolt 14 inserted between the bolt insertion holes 12 and 13 of the plates 5 and 8, the washer 15 and the nut. Friction bolt connection with 16 is made.

According to this structure, the joint box 1
Since the openings 10 are provided at the two corners, the user can insert his / her hands through the openings 10 and insert the bolts 14 into the bolt insertion holes 12 of the side plate 8 from the inside. Therefore, the beam 4 can be joined by rigid joining by friction bolt joining using a commercially available set product of ordinary high-strength bolts. As a result, the number of bolts used can be reduced, and the bolt tightening process can be reduced.

When the columns 2 and 3 and the joint box 1 are previously welded to each other in a factory to form one joint column, since the joint column does not have a protrusion such as a bracket, it is not bulky and is not bulky at a time. Can transport many pillars. Moreover, by simply providing the bolt insertion holes 12 on the four side surfaces of the joint box 1, the beams 4 can be joined in each direction, and the directionality of the columns is lost. Therefore, the number of pillars does not increase, and it is easy to build a prefabricated building. The joint box 1 can be processed with a general steel material.

Further, since the end plate 5 of the beam 4 is joined to the joint box 1, unlike the case where the bracket is provided, a beam or a through hole can be provided near the joint of the beam 4 with the pillar. Also, it is not necessary to provide a large number of notches for escaping brackets on the ALC plate or deck plate, etc., which will be the floor plate.

3 and 4 show an embodiment corresponding to claim 2. In this example, the openings 10 are provided at the four corners of the joint box 1, and the upper and lower reinforcing plates 11 provided in the joint box 1 are arranged at positions corresponding to the upper and lower flanges 4a and 4b of the beam 4, respectively. Each side plate 8 of the joint box 1 is formed of a single plate.

In this structure, the horizontal force acting between the upper flanges 4a, 4a of the beams 4, 4 on both sides of the joint box 1 is transmitted through the upper reinforcing plate 11 and acts between the lower flanges 4b, 4b. The horizontal force to be transmitted is transmitted through the lower reinforcing plate 11. Therefore, the upper and lower flanges 4a, 4 of the beam 4 are
The reinforcing plate 11 is integrated with the side plate 8 against the force of shearing and deforming the side plate 8 parallel to the beam 4 of the joint box 1 by the horizontal forces F1 and F2 acting in opposite directions on b. Increases rigidity and makes shear deformation less likely to occur. The horizontal forces F1 and F2 are generated by the interlayer displacement of the building and the like. Other structural effects are similar to those of the above-described embodiment. In this embodiment, the reinforcing plates 1 and 11 are located further on the intermediate side of the upper and lower reinforcing plates 11 and 11 than the bolt insertion hole 12 on the intermediate side in the height direction.
You may increase it by one.

5 and 6 show an embodiment corresponding to claim 3. In this example, the openings 10 at the four corners of the joint box 1 are provided at two locations vertically separated from each other, and horizontal reinforcement is provided inside the joint box 1 at the lower end of the upper opening 10 and the upper end of the lower opening 10. The plate 11 is provided. The bolt insertion holes 12 of the side plate 8 are provided in the height range of the upper and lower openings 10.

In the case of this configuration, the joint box 1
The upper flanges 4a of the pair of beams 4 and 4 joined to both sides of the
The horizontal force transmission between the lower flanges 4a and 4b is performed by the reinforcing plate 11 and the upper plate 6 at the lower end of the upper opening 10 and the horizontal force transmission between the lower flanges 4b and 4b. The reinforcing plate 11 on the upper end and the lower plate 7 are dispersed. Therefore, also in the case of this configuration, the reinforcing plate 11 is integrated with the side plate 8 to increase the rigidity, and the horizontal forces F1 and F2 acting on the upper and lower flanges 4a and 4b of the beam 4 in opposite directions as described above are used. The side plate 8 is prevented from being sheared. In particular, the portion between the upper and lower reinforcing plates 11, 11 has a box shape with no opening, so that the rigidity is further increased.

Although the openings 10 are provided only in the upper and lower portions, in the beam 4 made of H-shaped steel, the upper and lower flanges 4a,
It is only necessary to perform the joining with the bolt 14 in the vicinity of 4b, and it is not necessary to join the intermediate portion. Therefore, even if the opening is not provided in the intermediate portion, the hand is inserted into the joint box 1 and the bolt 14 is inserted. Does not cause any problems. Other structural effects are the same as those of the above-mentioned respective embodiments.

Although the reinforcing plate 11 is only provided in the joint box 1 in each of the above-described embodiments, a web plate having a cross-shaped horizontal cross section may be provided in the joint box 1. In the case of the embodiment of FIG. 4, it is desirable that the cross-shaped web plate is provided only in the portion between the upper and lower reinforcing plates 11 (beam-formed portion). In addition, in each of the above-described embodiments, the lower plate 7 may be slightly projected to the outside of the side plate 8, whereby the end plate 5 of the beam 4 can be placed on the lower plate 7 and the construction work can be easily performed. Become. Furthermore, in each of the above-described embodiments, the end plate 5 of the beam 4 may be replaced with a split tee. Further, the present invention can be applied to the column 2 not only to the square steel pipe but also to various shaped steels such as H-shaped steel.

[0026]

According to the beam-column joint structure of the present invention, since an opening is provided at a corner portion of the joint box, it is possible to insert a bolt from the inside into the bolt hole of the side plate by putting a hand through the opening. Therefore, a commercially available normal high-strength bolt can be used for joining the beams, and a rigid joint can be formed by friction bolt joining. As a result, the number of bolts can be reduced. Further, when the column and the joint box are welded in advance at the factory and the beam is joined at the site, since the column does not have a protrusion such as a bracket, it is not bulky and many columns can be transported at one time. Moreover, by simply providing the bolt insertion holes on the four side surfaces of the joint box, the beams can be joined in each direction, and the directionality of the columns is lost. Therefore, the number of pillars does not increase, and it is easy to build a prefabricated building.

In the case of the structure of claim 2, since each of the two side plates is composed of the two L-shaped bending plates, the number of parts is small and the manufacturing is easy. The rigidity of the box is increased.

According to the third aspect of the present invention, since the reinforcing plates located at the heights of the upper and lower flanges of the beam are provided in the joint box, these reinforcing plates are integrated with the side plates to increase the rigidity, and It is possible to prevent the side plates parallel to the beams of the joint box from shearing due to horizontal forces acting on the flanges in opposite directions.

Also in the case of the construction of claim 4, the rigidity of the side plate is enhanced by the reinforcing plate of the joint box,
The shear deformation is prevented. Moreover, the portion between the upper and lower reinforcing plates has a box shape with no opening, so that the rigidity is further enhanced and shear deformation is less likely to occur.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an embodiment of the present invention.

FIG. 2 is a horizontal sectional view showing a state during the assembling.

FIG. 3 is an exploded perspective view of another embodiment of the present invention.

FIG. 4 is a cutaway front view of the disassembled state.

FIG. 5 is an exploded perspective view of still another embodiment of the present invention.

FIG. 6 is a cutaway front view of the disassembled state.

FIG. 7 is a front view of a conventional example.

[Explanation of symbols]

1 ... Joint box, 2, 3 ... Pillar, 4 ... Beam, 5 ... End plate (end member), 6 ... Upper plate, 7 ... Lower plate, 8 ... Side plate, 10 ... Opening, 11 ... Reinforcing plate, 12 , 13 ... Bolt insertion hole, 14 ... High strength bolt

Claims (4)

[Claims] 1. Between the upper plate and the lower plate,
A joint box having four side surface plates and openings at the corners of the side surfaces is provided, bolt insertion holes are provided in the side surface plate, and the upper and lower plates are respectively joined to the upper and lower pillars, and the side surface is provided. A beam-column joint structure in which the end members of the beam are bolted to the plate. 2. Between the upper plate and the lower plate,
Two pieces of L-shaped bending plates, both of which are side plates, are provided so as to face each other, and a horizontal reinforcing plate is sandwiched inside the side plates, and openings are formed at a pair of corners between the two bending plates. A column-beam joint structure in which a joint box is provided, each side plate of the joint box is provided with a bolt insertion hole in advance, and an end member of a beam is bolted to the side plate. 3. The joint box is provided with a plurality of horizontal reinforcing plates, and the height positions of these reinforcing plates are substantially the same as the upper and lower flanges of the beam made of shaped steel joined to the side plate. The beam-column joint structure according to 1. 4. The corner box openings of the joint box are provided at two locations separated vertically, and horizontal reinforcing plates are provided inside the joint box at the lower end of the upper opening and the upper end position of the lower opening, respectively. The beam-column joint structure according to claim 1.