JPH01190838A - Column beam connection member - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to structures in the field of architecture or civil engineering, and particularly relates to a column formed by filling a square steel pipe column with concrete and a beam installed therein. It relates to the structure of members to be joined.

[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. Must be. Note that concrete is usually press-fitted from below the steel pipe columns.

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

[Problem to be solved by the invention] However, in a diaphragm in which through holes are simply provided in a thick plate with uniform wall thickness, the through holes can be made very difficult from the viewpoint of strength. The flow of the concrete being press-fitted was blocked in areas other than the through-holes, 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 installed around the outer periphery of the column, press-fitting and filling of concrete can be performed well, but it is not recommended to make the thickness too large because it will be difficult to weld with the beam. However, 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 problem) The column-beam joint member according to the present invention is made of an integrally molded product by casting or forging, and has through-holes in the center and four corners to allow concrete to flow smoothly, and The wall thickness of each part is set to correspond to the planar area of , and to the extent that the expected external force can be sufficiently propagated: The edge of each of the above-mentioned through holes is formed into a predetermined slope with respect to the concrete press-in direction. This solves the above problems.

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

That is, there are through holes in the center and four corners, and the edges of the through holes have a predetermined inclination with respect to the concrete filling direction, so the concrete to be press-fitted passes through the through holes smoothly, Even if the concrete sinks after press-fitting is completed, voids are almost never formed at corners, etc.

Furthermore, the parts other than the through holes correspond to the planar area of each part,
Since 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 prevents the strength from decreasing in some parts. Never happened.

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

FIG. 1 shows the structure of a beam-column joint member 10 according to an embodiment of the present invention, in which (A) is a plan view and (B) is a -
A front view of the immediate cross section, and (C) a cross-sectional view in the a-a direction.

The column-beam joining member 10 according to this embodiment is composed of a ring part 11, through holes 12, 14, and an edge part 16,
These are all integrally formed by casting.

In the figure, 12 is a central through hole, and 14 is a corner through hole.The central through hole 12 is formed in a circular shape in the center of the joining member, and the corner through holes 14 are formed in the four corners of the edge portion 16 in a fan shape. is formed.

The outer peripheral shape of the joining member 10 partitioned by the edge portion 16 corresponds to a square steel pipe column 18, which will be described later, and is formed in substantially the same shape as the steel pipe column 18.

In this embodiment, the areas of the through holes 12 and 14 are made as large as possible so that concrete can be press-fitted into the pillar interior smoothly.

Furthermore, for the same purpose, the edges of the center through hole 12 and the corner through holes 14 are each formed with a predetermined inclination toward the concrete press-in direction, that is, toward the inside of each through hole.

On the other hand, in order to stably propagate the external force transmitted from the beam, the cross-sectional area (ring part 1
Each part of the ring part 11 has a thickness of 1), and the parts with a small planar area are made thicker accordingly. In other words, the internal pressure of the ring portion 11 compensates for the propagation of force in the portion with a small flat area, thereby avoiding a partial decrease in strength of the ring portion 11 due to the expansion of the area of the through hole 12.14. .

The edge portion 16 provided on the outer periphery of the ring portion 11 is formed thinner than the ring portion 11 in order to facilitate welding with a beam to be described later.

Next, the arrangement and construction state when the above embodiment is actually used will be explained based on FIG. 2.

In the state shown in FIG.
are set to be joined by welding, and (
A) shows a cross section of the view from the front, and (B)
shows each view from above.

In the figure, 18 is a square steel pipe column, 20 is an H-shaped steel bar, and a notch 22 is formed near the connection part of the beam 20 with the square steel pipe column 18 for convenience of welding.

24 is the old backing part for welding. In this embodiment, the backing part A is not provided at the joint between the ring part 11 and the square steel pipe column 18, or there is no problem even if it is provided.

26 is concrete filled in the square steel pipe column 18, and is press-fitted from below the square steel pipe material 18.

Then, by welding the necessary parts in this state, the square steel pipe column 18. The joining member 10 and the beam 20 are each joined.

As mentioned above, the reason why the edge portion 24 is thinner than the ring portion 11 is due to the management and economic aspects of such welding work, and the thickness of the edge portion 24 is approximately the same as that of the beam 20. By making them the same, the heat input before welding can be made uniform, and the welding conditions can be matched to achieve good welding. At the same time, the materials required for the joining member 10 can be saved due to the thinner wall thickness.

As described above, in this embodiment, since the outer peripheral shape of the joining member 10 is almost the same as that of the square steel pipe column 18, the column]8
There is an advantage that the member 10 does not protrude to the outside and does not require extra space.

In addition, the center through-hole 12 and the corner through-holes 14 are each made as large as possible, and the edges of the through-holes 12 and '14 are provided with a predetermined inclination with respect to the direction of press-in of the concrete 26. Concrete 26 is pressed into column 18 very well.

It has the effect of being able to be filled.

In addition, when an external force is applied to the beam 20, the column-beam joint member 10
Another effect is that the stress generated in the ring portion 11 can be uniformly propagated and absorbed.

Note that if you try to increase the area of the through holes 12 and 14 and at the same time reduce the volume of the joint part 10, the ring part 11
Since the cross-sectional shape of the cross-sectional shape may not be uniform, it is desirable to manufacture it by casting as mentioned above, but it is also possible to manufacture it by forging.

In addition, in the above embodiment, for convenience of explanation, the through hole 12
．． Needless to say, the inclined portion 14 may be shown as a straight line, or may have a smooth curved shape in order to smoothly press in the concrete 26.

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

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the present invention, (A) is a plan view, (
B) is a front view in one cross section, (C) is a sectional view along the a-a direction, and FIGS. 2(A) and 2(B) are a side view and a plan view showing the construction state of the embodiment. "Explanation of symbols of main parts" 10...Ring part, 12...Central through hole, 14...
- Corner through hole, 16... Edge part, 18... Square steel pipe column, 20... Beam, 26-... Concrete In each figure, the same reference numerals indicate the same or equivalent parts. Agent Patent Attorney Masatoshi Sato

Claims (2)

[Claims] (1) A column-beam connecting member that connects a square steel pipe column and a beam by intervening at the connection part of a square steel pipe column into which concrete is press-fitted and filled, and is made of an integrally molded product by casting or forging. , Provide through holes in the center and four corners to allow the concrete to flow smoothly, and provide each part with a cross-sectional area large enough to propagate the expected external force, and the edges of each of the through holes as described above. A column-beam joint member characterized by forming a predetermined inclined surface with respect to the direction of concrete press-in. (2) The column-beam joint member according to claim 1, wherein the joint portion with the beam has approximately the same thickness as the beam to be joined.