JPH01190839A - Column beam connection member - Google Patents

Abstract

PURPOSE:To improve concrete penetration and filling performance by making use of a column girder joint which is provided with a through hole formed with a taper section having a specified angle at the center within a circumferential ring for the girder joining sections of angular steel pipe columns. CONSTITUTION:Column girder joints 10 and 20 composed of integral components formed by casting or forging are arranged for the girder joining sections of angular steel pipe columns 40a and 40b. A through hole 26 for concrete is provided for the center within the circumferential ring 22 of the joint 10, and the circumferential ring 22 is formed with a taper section 24 extending up to the periphery of the through hole 26. And let the taper section 24 have the cross sectional area strong enough to the order through which anticipated external force can be sufficiently transmitted.

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to structures in the field of architecture or civil engineering, and particularly relates to a structure in which a steel pipe column is filled with concrete and a beam installed therein. Regarding the structure of the member.

[Prior Art] When joining a column and a beam, the joint must be designed in consideration of the external force, or moment, applied to the beam.

In addition, in recent years, many structural columns are made of steel pipes filled with concrete in order to improve their strength, so in such cases, the filling properties of the concrete to be press-fitted must also be taken into account. There must be. Note that concrete is usually press-fitted from below the steel pipe columns.

Under these circumstances, conventional methods have been to install a thick plate with a uniform thickness with a through hole in the center as a diaphragm inside the column connection, or to install a diaphragm with a uniform thickness around the outer periphery of the column. This was dealt with by setting up a

[Problems to be Solved by the Invention] However, in a diaphragm in which a through hole is simply provided in a thick plate with uniform wall thickness, the through hole cannot be made very large from the viewpoint of strength, and in addition to this, the through hole cannot be made very large. The flow of the concrete being press-fitted was obstructed in this area, making it difficult to press-fit the concrete smoothly. Furthermore, after concrete was press-fitted from below the steel pipe column, the concrete sank and voids were formed at the corners of the diaphragm, and the steel pipe column was not sufficiently filled with concrete.

On the other hand, if a diaphragm with a uniform wall thickness is provided around the outer circumference of the column, it is possible to press in and fill concrete, but it is difficult to weld it with the beam, so it is difficult to make it too thick. As a result, the steel pipe columns protrude outward, requiring extra space in terms of plane, which is a big problem, especially when the steel pipe columns are used indoors.

The present invention has been made in view of these points, and an object of the present invention is to provide a column-beam joint member that has good concrete press-in and filling properties and requires a small planar space.

[Means for Solving the Problems] The column-beam joint member according to the present invention is made of an integrally molded product by casting or forging: a through hole is provided in the center of the outer peripheral ring to allow the concrete to flow therethrough smoothly; The above problem is solved by forming a tapered part in the outer ring that reaches the edge of the through hole, and by giving each part of this tapered part a cross-sectional area large enough to sufficiently propagate the expected external force. This is what I did.

[Function] The column-beam connecting member according to the present invention is an integrally molded product by casting or forging, and has a desired shape so that the member does not protrude outside the column when it is interposed in the connecting part of the steel pipe column. In addition to being able to be molded, it also has the following effects.

That is, since a through hole is provided in the center and the edge of the through hole has a predetermined slope with respect to the concrete filling direction, the concrete to be press-fitted passes through the through-hole smoothly, and after the press-fitting is completed. Even if the concrete sinks, voids are almost never formed at corners, etc.

Furthermore, the parts other than the through holes correspond to the planar area of each part,
Because it is formed with a wall thickness that is sufficient to propagate the expected external force, stable stress propagation can be achieved in any part, and the provision of the above-mentioned through holes will prevent the strength from decreasing in some parts. Never.

[Embodiments] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows a column-beam joint member 1 according to a first embodiment of the present invention.
0 structure is shown, in which (A) is a plan view and (B)
is a front view of a single section.

The column-beam joint member 10 according to this embodiment is for a square steel pipe column, and is manufactured by casting.

In the figure, 12 is an outer ring, 14 is a tapered portion having a predetermined inclination angle, and 16 is a through hole formed in the center of the joining member 10.

The outer circumferential ring 12 has a shape that matches the outer circumferential shape of the steel pipe column, and is formed to have the largest thickness among the joining members 10, and extends from the boundary with the integrally formed tapered portion 14 to the center of the through hole 16. The meat pressure gradually becomes thinner towards the top.

Such a structure is intended to allow concrete to be press-fitted from below the through hole 16 to flow smoothly, and the area of the through hole 16 is made as large as possible, but at the same time, the strength of the joint member 10 is increased. In order to prevent a partial drop, measures are taken such as increasing the thickness of the outer ring 12.

That is, while making the area of the through hole 16 as large as possible, in order to ensure stable force propagation, the outer ring 12 and the tapered portion 14 have a cross-sectional area that corresponds to the magnitude of the external force transmitted from the beam.
, and the parts with smaller flat areas are thicker accordingly. In other words, the pressure of each part compensates for the propagation of force in the part with a small flat area, and this allows the through-hole 16
This avoids a partial decrease in strength of the joining member 1o due to an increase in area.

Next, a second embodiment of the present invention shown in FIG. 2 will be described. This embodiment is an improvement in the case where the column-beam connecting member according to the present invention is used at the connection part of steel pipe columns with different diameters. It is a type.

Note that the same parts and their functions and operations as those of the first embodiment described above will be omitted.

Similarly to FIG. 1, FIG. 2 shows the structure of the column-beam joint member 2° using a plan view (A) and a front view (B) in cross section.

In the figure, reference numeral 22 denotes an outer circumferential ring, which is formed so that the outer circumferential diameter of the lower part and the upper part thereof are different in accordance with the outer circumferential shape of the steel pipe column to be connected. Further, a tapered portion 24 having a predetermined inclination angle toward the center is formed on the lower inner circumference of the joining member 20. Further, the upper inner periphery of the joining member 20 may also be tapered toward the center, but when concrete is press-fitted from below, almost the same effect can be expected even if it is not provided.

26 is a circular through hole for press-fitting concrete.

In this second embodiment, as in the first embodiment described above, the area of the through hole 26 is made as large as possible, and the magnitude of the external force transmitted from the beam is adjusted to ensure stable force propagation. The outer ring 22 and the tapered part 2 have corresponding cross-sectional areas.
4, and the pressure of each part compensates for the propagation of force in the part with a small planar area.

Next, a third embodiment of the present invention shown in FIG. 3 will be described, which is intended to reduce the cost of the first embodiment described above. That is, in the first embodiment, materials are saved in areas that do not significantly affect the effects of the present invention.

Note that descriptions of the same parts as in the above-mentioned embodiment No. 1 and their functions and operations will be omitted.

In FIG. 3, the column-beam joint member 3 is shown as in FIGS. 1 and 2.
The structure of 0 is represented by a plan view (A) and a front view in half section (B).

In the figure, reference numeral 32 denotes an outer circumferential ring having substantially the same outer circumferential shape as the outer circumferential shape of the steel pipe column used, and reference numeral 34 denotes a tapered portion having a predetermined inclination upward from the center. Reference numeral 35 denotes a reinforcing portion, which is provided to compensate for the decrease in strength due to the thinning of the inner wall thickness of the outer circumferential ring 32.

These outer rings 32. The tapered portion 34 and the reinforcing portion 35 are integrally formed by casting.

Reference numeral 36 denotes a circular through hole, which is formed as tightly as possible so that the concrete press-fitted into the column can flow smoothly.

In addition, in this third embodiment, the cross-sectional area of the outer ring 32 and the tapered portion 3 is determined according to the magnitude of the external force transmitted from the beam, for the same purpose as the first and second embodiments described above.
4, and the pressure of each part compensates for the propagation of force in the part with a small planar area.

Next, construction conditions using the first and second embodiments described above will be explained based on FIG. 4.

In FIG. 4, the joint member 10 is attached to the joint part of the square steel pipe column.
．． 20 is installed and beams 42 are shown set to be joined by welding.

In the figure, 40a and 40b are square steel pipe columns;
The diameter of 40b is larger than that of 0a. 42 is a beam of H-shaped steel, and in this example, a steel pipe column 40a,
It is designed to be joined at three locations on the left, right, and front sides of the beam 40b, and a notch 44 is formed near the connection portion of the beam 42 with the square steel pipe column 40b for convenience of welding.

46 is a backing member for welding provided at each location.

48 is concrete filled in the square steel pipe column 18, and is press-fitted from below the square steel pipe column 40b.

Then, in this state, the square steel pipe columns 40a, 40b, the column-beam connecting member 10, and the beam 20 are respectively joined by welding the necessary locations.

As mentioned above, on the wood flow side, the joint old 10.2
0 and 30, the outer peripheral shape is a square steel pipe column 40a or 4
Since it is formed in a shape corresponding to 0b, the steel pipe column 40
There is an advantage that the relevant parts do not protrude outside of a and 40b, and no extra space is required.

In addition to this, the through holes 16.26 and 36 are provided, as well as the tapered portions 14.24 and 34, so that the concrete 48 can be pressed into and filled into the square steel pipe columns 40a and 40b very well. There is.

In addition, when an external force is applied to the beam 42, the column-beam joint month 10
Alternatively, there is also the effect that the stress generated on the surface 20 is uniformly propagated and absorbed.

In addition, in this embodiment, if an attempt is made to increase the area of the through hole 16°26.36 and at the same time reduce the volume of the joining member 10, 20, 30, the cross-sectional shape of each member will inevitably become uneven. Although it is desirable to manufacture by casting as described above, it is also possible to manufacture by forging.

In addition, in the above embodiment, for convenience of explanation, each tapered part is shown as a straight line, or it goes without saying that it is designed to have a smooth curved shape in order to press-fit the concrete 48 more smoothly. Nor.

[Effects of the Invention] As explained above, the present invention has the advantage that a predetermined design strength can be achieved with the minimum amount of steel used, and that it is possible to save planar space without projecting to the outside. In addition, it has the effect of improving the press-fitting and filling properties of concrete.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIGS. 1(A) and 1(B) show a first embodiment of the present invention,
(A) is a plan view, and (B) is a front view in one cross section. FIGS. 2(A) and 2(B) show a second embodiment of the present invention,
(A) is a plan view, and (B) is a front view in one cross section. Figure 3 (A). (B) shows a third embodiment of the present invention, (A) is a plan view, and (B) is a front view in one cross section. Figure 4←←〒=
→→ is an explanatory diagram showing the construction state of the example. "Explanation of symbols of main parts" 12.22.32...Outer ring, 14, 24°34
...Tapered part, +6.26.36...Through hole, 4
0a, 40b...Steel pipe column, 42...Beam, 48...
Concrete In each figure, the same reference numerals indicate the same or equivalent parts. Agent: Patent Attorney Masatoshi Sato] 2 utsuC)

Claims (1)

[Scope of Claims] A column-beam connecting member that connects a steel pipe column and a beam by intervening at the connection part of a steel pipe column into which concrete is press-fitted and filled, comprising an integrally molded product by casting or forging. A through hole is provided in the center of the outer ring to allow the concrete to flow smoothly, and a tapered part is formed in the outer ring to reach the edge of the through hole, and this tapered part is provided with an external force that is not expected to be applied. A beam-column joint member characterized in that each part has a cross-sectional area large enough to sufficiently propagate the flow.