JPH04343935A - Column/beam joint system - Google Patents

Abstract

PURPOSE:To obtain a light-weight, low-cost joining structure which offers high joining strength in joining a beam to the outside of a column formed of a round steel pipe. CONSTITUTION:A column mainframe 1 is welded to the end of a joining cylinder 2 which has almost the same size with the column mainframe 1 via a diaphragm 3, and the end of a bracket 6 is welded to the outer periphery of the diaphragm 3 at the least. Then end plate 13 of a beam 12 is joined to the end plate 9 at the end of the bracket 6 with bolts 15.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for joining a beam made of H-shaped steel to a column made of a round steel pipe.

0002

[Prior Art] Conventionally, as a means of joining an H-shaped steel beam to a column made of a round steel pipe, a bracket with an end plate is welded to the side of the column in advance, and the end plate and the beam end are welded to the side of the column. A method is used in which the end plates of the parts are joined with bolts.

0003

[Problems to be Solved by the Invention] In the above, in the conventional device in which the bracket is welded, the bracket is welded directly to the outer surface of the column, so if a thick column is not used, the joint part will buckle. This increases the weight of the entire column, making it difficult to handle, and also increases the material cost. In this case, it is conceivable to use a thick joining cylinder for the bracket portion, but even in this case, an expensive joining cylinder is required, resulting in high costs. This invention was made with the aim of solving the conventional drawbacks of columns and beams using such round steel pipes.

0004

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention involves welding a diaphragm to both ends of a joining cylinder that is fixed to the end of a column made of a round steel pipe, and At least a bracket is welded to the end of the column main body, and comprises a pair of horizontal upper and lower flange plates and a web plate connecting the center portions of both flange plates, and has an end plate fixed to the tip thereof. The end portion of the flange plate is welded and fixed to the outer periphery of the diaphragm, and the end plate of the bracket and the end plate at the tip of the beam made of H-shaped steel are joined with bolts.

[0005] In the above, it is conceivable to use a steel ring as the diaphragm.

[0006]

[Operation] According to the structure of the present invention, a diaphragm is provided at both ends of the joining cylinder, and a bracket is welded to the outer periphery of the diaphragm, so the joint has a high strength structure with no risk of buckling or deformation. is obtained. Furthermore, since the horizontal load from the beam is supported through the diaphragm, there is no need to use thick joining cylinders and column bodies.

[0007]

[Example] In the diagram showing an example of the present invention, 1, 1
2 indicates a pair of upper and lower column bodies made of round steel pipes, and 2 indicates a joining cylinder 2 having approximately the same diameter as the column body 1. 3 is a diaphragm 3 made of a pair of steel rings, these diaphragms 3 are welded and fixed to the ends of the joining cylinder 2, and furthermore, the diaphragm 3 is fixed to the end of the joining cylinder 2 on the opposite side of the joining cylinder 2. The end face of the column body 1 is welded and fixed to the end face of the pillar body 1 by butt welding.

The bracket 6 attached to the pillar 5 equipped with the diaphragm 3 and the joining cylinder 2 includes a pair of horizontal upper and lower flange plates 7, 7, and the flange plate 7.
, 7, and an end plate 9 welded to the tips of the deflected flange plates 7, 7 and the web plate 8. The end plate 9 has four bolt holes 10, 10, . . . formed therein for connecting the beams. The ends of the flange plates 7, 7 on the opposite side from the end plate 9 are formed into an arc shape that fits the outer peripheral surface of the diaphragm 3, and the arc-shaped ends 11, 11 are welded to the outer peripheral surface of the diaphragm 3. ing. Furthermore, the end of the web plate 8 is connected to the joining cylinder 2.
It is welded to the outer circumferential surface of the

Reference numeral 12 denotes a beam made of H-shaped steel, and an end plate 13 that fits the end plate 9 of the bracket 6 is welded to the end of the beam. Further, bolt holes 14, 14, . . . for joining are formed in this end plate 13. Then, the end plate 9 of the bracket 6 and the end plate 13 of the beam 12 are brought into contact with each other and fixed with high-strength bolts 15 inserted into the bolt holes 10 and 14, thereby joining the beam 12 to the column 5. be. in this case,
As shown in FIG. 2, by welding the bracket 6 while shifting it in the circumferential direction of the diaphragm 3, the beam 12 can be attached at any angle.
can be joined.

0010

[Effects of the Invention] As described above, in this invention, a diaphragm is provided at both ends of the joining cylinder, and a bracket is welded to the outer periphery of the diaphragm, so the strength of the joint is high and there is no risk of buckling or deformation. This results in a structure that does not exist. Since the horizontal load from the beam is supported through the high-strength diaphragm, there is no need to use thick joining cylinders and column bodies. Therefore, it is lightweight and easy to handle, and the material cost is low. Furthermore, since a commercially available steel ring can be used as the diaphragm, it can be manufactured at a lower cost. Furthermore, by installing the bracket by shifting it in the circumferential direction of the diaphragm,
This has the effect that the installation angle of the beam can be changed arbitrarily.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of a column-beam joint showing an embodiment of the invention.

FIG. 2 is a cross-sectional view of the joint portion.

FIG. 3 is a side view of a main part of a column to which beams are connected.

[Explanation of symbols]

1 Pillar body 2　Cylinder for joining 3 Diaphragm 5 Pillar 6 Bracket 7 Flange plate 8 Web plate 9 End plate 12 Beam 13 End plate 15 High strength bolt

Claims (2)

[Claims] [Claim 1] A diaphragm is welded to both ends of a joining cylinder fixed to the end of a column made of a round steel pipe, and the end of the column is welded via the diaphragm to the end of the column to form a pair of horizontal upper and lower columns. A bracket consisting of a flange plate and a web plate connecting the central parts of both flange plates, and having an end plate fixed to the tip thereof, is fixed by welding at least the end of the flange plate to the outer periphery of the diaphragm. Also, a column/beam joining device characterized in that the end plate of the bracket and the end plate plate at the tip of the beam made of H-shaped steel are joined with bolts. [Claim 2]Claim 1, wherein the diaphragm is a steel ring.
Column/beam joining device described.