JPH0633517A - Joint part structure of filling type steel pipe concrete column and beam and joining method therefor - Google Patents

Abstract

PURPOSE:To decrease the maximum flexure of a beam even if a long span beam is joined between columns by disposing a pair of filling type steel pipe concrete columns at a space therebetween so as to exert no bad influence upon a concrete floor slab disposed on the beam. CONSTITUTION:An opening is bored in a joint position of a steel pipe column 1a where the interior of the pipe is densely filled up with concrete. A steel pipe beam 2 where the interior of the pipe near the end is blocked up by a partition plate 5 is fixed in a joint position in such a manner as to cover the opening. The interior of the steel pipe column is filled up with concrete. The interior of the steel pipe beam 2 extending from the joint position to the partition plate 5 is densely filled up with concrete connected to the concrete of the interior of the steel pipe column through the opening.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint portion between a column and a beam in a building, and more particularly, a joint portion structure between a concrete column and a beam having a filled steel tube formed by filling the inside of a steel pipe with concrete, and joints thereof. It is about the method.

[0002]

2. Description of the Related Art The structure of a joint between a column and a beam (main beam) is composed of a filled steel pipe concrete member (hereinafter referred to as a filled steel pipe concrete column) as a pillar material, and is joined between the filled steel pipe concrete columns. In recent years, many super-high-rise buildings in which the beam material to be used is made of H-shaped steel have been adopted. According to the joint structure of the column and the beam, the steel material amount of the steel frame and the reinforcing bar, and further the fireproof coating thickness can be reduced, and the formwork step and the reinforcing bar assembly step are unnecessary as compared with the conventional method. It has a very big advantage that

Here, the filled-type steel pipe concrete column is a composite material in which concrete is densely filled inside the steel pipe column to completely integrate the steel pipe and the concrete, and the load (compressive force) of the building structure is axially applied. Even if it acts, the concrete inside the steel pipe supports the compressive force with compressive strength, and the radial expansion due to the compression of concrete is suppressed by the confined effect (circumferential tightening stress) of the steel pipe, It becomes a pillar material with increased strength.

[0004]

However, in the above-mentioned joint structure of columns and beams, when the span between the filled steel tubular concrete columns is designed to be long, the joints between the filled steel tubular concrete columns H The maximum bending amount of the beam of shaped steel becomes large, which causes the beam itself to easily vibrate due to an earthquake or the like. Therefore, there is a possibility that the floor slab (made of concrete) supported by the H-shaped steel beam may cause a phenomenon such as cracking. In addition, there was a risk of floor vibration. Therefore, in the above-mentioned construction method, it has not been possible to design the building by lengthening the span between the filled steel tubular concrete columns.

The present invention has been made in view of the above circumstances, and even if a pair of filled steel tubular concrete columns are spaced from each other and a beam having a long span is joined between the columns, the maximum amount of deflection of the beam is reduced. It is an object of the present invention to provide a joint structure between a filled steel tubular concrete column and a beam that does not adversely affect a concrete floor slab arranged in the upper part, and a joining method thereof.

[0006]

According to a first aspect of the present invention, there is provided a joint structure of a filled steel tubular concrete column and a beam, comprising:
It is a joint structure of a steel pipe column filled with concrete inside and a beam joined to a side portion of the steel pipe column, and an opening hole is formed at a joint position of the steel pipe column densely filled with concrete inside the pipe. A steel pipe beam that has been drilled and closed the inside of the pipe near the end with a partition plate is fixed at the joining position covering the opening hole, and
The inside of the pipe from the joint position of the steel pipe beam to the partition plate is densely filled with concrete inside the steel pipe column and concrete continuous through the opening holes.

According to a second aspect of the present invention, in the joint structure between the filled steel pipe concrete column and the beam according to the first aspect, a large number of protrusions are formed on at least the end side inner wall of the steel pipe beam. Structure.

Further, in the method of joining a filled-type steel pipe concrete column and a beam according to claim 3, first, an opening hole is formed at a joining position of the steel pipe column, and the inside of the pipe near both ends of the steel pipe beam is partitioned. Block with a plate, then fixed the steel beam to the joining position in a state of covering the opening hole, then press-fitting concrete from the bottom of the steel pipe column, the concrete inside the pipe of the steel pipe column This is a method in which the partition plate is densely filled, and then the concrete that has flowed from the opening hole of the steel pipe column into the pipe of the steel pipe beam is filled up to the partition plate.

[0009]

According to the joint structure of the filled steel pipe concrete column and the beam according to claim 1 of the present invention, the concrete which is densely filled in the entire pipe interior of the steel pipe column and the continuous structure through the opening hole, Since the structure from the joint position of the steel pipe beam to the partition plate is densely filled with concrete, the rigidity of the end portion of the steel pipe beam is increased and the bending strength of the joint side of the steel pipe beam is increased. , The maximum deflection of the steel pipe beam decreases. Therefore, even when a pair of filled steel tubular concrete columns are spaced apart and a beam with a long span is joined between the columns, the maximum amount of deflection of the beam is smaller than that of a beam made of H-shaped steel. , Does not adversely affect the concrete floor slab supported on the beam.

Further, according to the joint structure of the filled-type steel pipe concrete column and the beam according to the second aspect, a large number of projections formed on the inner wall of the steel pipe beam are connected to the concrete inside the pipe and the inner wall of the steel pipe beam. Increase the binding force of. As a result, a steel pipe beam and concrete are further integrated to obtain a beam having increased bending strength.

Further, according to the method for joining the filled-type steel pipe concrete column and the beam according to the third aspect, the filling concrete is press-fitted from the lower portion of the steel pipe column to continuously open the inside of the pipe of the steel pipe column. The concrete that has flowed through the holes is densely filled from the joint position of the steel pipe beams to the partition plate.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a cross-sectional structure of a joint between a column and a beam, and reference numeral 1 represents a filled steel pipe concrete column,
Reference numeral 2 denotes a steel pipe beam joined between the filled steel pipe concrete columns 1 and 1. Reference numeral 9 is a concrete floor slab supported by the steel pipe beam 2.

As shown in FIGS. 2 and 3, the filled-type steel tubular concrete column 1 has a structure in which concrete 7 is filled inside a rectangular steel tubular column 1a. Then, at the joining position S of the steel pipe column 1a with the steel pipe beam 2, a rectangular opening hole 3 is formed.
Are formed.

On the other hand, the steel pipe beam 2 is also composed of a square steel pipe whose height dimension is set larger than its width dimension. And
As shown in FIG. 4, a large number of ribs (projections) 4 ... Are formed on the inner wall of the steel pipe beam 2. Further, inside the steel pipe beam 2, two partition plates 5 and 5 are fixed to the end portions 2a, 2a side so as to close the inside of the steel pipe beam 2. In addition, the steel pipe beam 2 covers the opening holes 3 and 3 of the pillar 1 while the end portion 2 is covered.
a and 2a are aligned with the joining position S, and the periphery of the abutting portion is welded to be joined, whereby the steel pipe columns 1a and 1a and the steel pipe beam 2 are integrated.

Then, concrete having a high fluidity is press-fitted from the press-fitting holes 6 formed in the lower portions of the steel pipe columns 1a, 1a, so that the concrete 7 is gradually introduced into the steel pipe column 1a from the lower part. It is poured closely to form a filled steel tube concrete column 1. Further, the concrete 8 is continuously poured into the inside from the opening hole 3 to the partition plate 5 of the steel pipe beam 2. Thereby, as shown in FIG. 3, the concrete 7 and 8 are continuously and densely filled in the steel pipe pillar 1a and the steel pipe beam 2.

Here, when the concrete 8 filled inside the steel pipe beam 2 is solidified, the coupling force between the ribs 4 formed on the inner wall and the concrete 8 is significantly improved.

According to the joint structure of columns and beams having the above-mentioned structure, even if the span between the filled steel pipe concrete columns 1 and 1 is designed to be long, the concrete 7 inside the steel pipe columns 1a and the end portions 2a of the steel pipe beams 2 are formed. Since the concrete 8 densely filled in the 2a side is continuously filled, the bending strength of the joint position S of the steel pipe beam 2 increases, and the maximum bending amount of the steel pipe beam 2 decreases accordingly.

Further, a large number of ribs 4 ... Formed on the inner wall of the steel pipe beam 2 increase the coupling force between the concrete 8 inside the pipe and the inner wall of the steel pipe beam 2, whereby the steel pipe beam 2 and the concrete 8 are connected. Fully integrated to increase bending strength.

Further, simply by press-fitting the filling concrete from the press-fitting holes 6 of the steel pipe columns 1a, 1a, the interior of the pipe of the steel pipe column 1a passes through the opening hole 3 and the partition plate from the joining position of the steel pipe beam 2 Since the concrete 8 is densely filled inside the pipes up to 5, labor saving of the concrete press-fitting process can be achieved.

Therefore, in this embodiment, even if the span between the filled steel tubular concrete columns 1 and 1 is designed to be long,
Since the rigidity is increased and the maximum deflection amount is reduced compared to the conventional beam made of H-shaped steel, the floor slab made of concrete 9
There is no need to worry about cracking or floor vibration.

Incidentally, FIG. 5 shows another embodiment of the steel pipe beam 2 in which a large number of studs 10 ... Are formed on the inner wall. In this steel pipe beam 2, the studs 10 increase the bonding force between the concrete 8 inside the pipe and the inner wall of the steel pipe beam 2 in the same manner as the steel pipe beam having the ribs 4 formed. The bending strength can be increased by completely integrating them.

[0022]

As described above, according to the first aspect of the present invention.
According to the joint structure of the filled steel pipe concrete column and beam described, through the concrete and the opening holes that are densely filled in the entire pipe interior of the steel pipe column, inside the pipe from the joint position of the steel pipe beam to the partition plate Since the structure is such that the concrete is continuously and densely packed, the rigidity of the ends of the steel pipe beam is increased and the bending strength at the joint side of the steel pipe beam is increased.As a result, the maximum bending amount of the steel pipe beam is increased. The maximum bending amount of the beam becomes smaller than that of the beam made of H-shaped steel even if the span between the filled steel tubular concrete columns is increased,
It does not adversely affect the concrete floor slab supported on the beam. In addition, the vibration of the floor will not be disturbed.

Further, according to the joint structure of the filled-type steel pipe concrete column and the beam according to the second aspect, a large number of projections formed on the inner wall of the steel pipe beam are connected to the concrete inside the pipe and the inner wall of the steel pipe beam. In order to increase the binding force of the steel pipe, the steel pipe beam and the concrete are further integrated to obtain a beam with increased bending strength.

Further, according to the method for joining a filled-type steel pipe concrete column and a beam according to claim 3, the filling concrete is press-fitted from the lower portion of the steel pipe column, so that the opening is continuously formed inside the pipe of the steel pipe column. The concrete that has flowed through the holes is densely filled from the joint position of the steel pipe beams to the partition plate, and labor can be saved in the concrete press-fitting process.

[Brief description of drawings]

FIG. 1 is a view showing a joint structure of a steel pipe column and a steel pipe beam according to the present invention.

FIG. 2 is a view showing an opening hole formed in a steel pipe column of the present invention.

FIG. 3 is a diagram showing a joint structure of a filled steel tube concrete column and a beam according to the present invention.

FIG. 4 is a diagram showing a large number of protrusions formed on the inner wall of the steel pipe beam according to the present invention.

FIG. 5 is a view showing another embodiment of a large number of protrusions formed on the inner wall of the steel pipe beam according to the present invention.

[Explanation of symbols]

 1 Filled steel pipe concrete column 1a Steel pipe column 2 Steel pipe beam 2a Steel pipe beam end 3 Opening hole 4 Rib (projection) 5 Partition plate 6 Press fit hole 7 Concrete filled inside rectangular steel pipe column 8 Filling inside steel pipe beam Concrete 9 Floor slab 10 Stud (protrusion) S Joint position

Claims (3)

[Claims] 1. A joint structure of a steel pipe column in which the inside of the pipe is filled with concrete and a beam joined to the side part of the steel pipe column, wherein the steel pipe column in which the concrete is densely filled inside the pipe is joined. A steel pipe beam having an opening hole at a position and closing the inside of the pipe near the end with a partition plate is fixed to the joining position by covering the opening hole, and moreover, from the joining position of the steel pipe beam to the partition plate. In the inside of the pipe, the concrete inside the steel pipe column and the concrete continuous through the opening are densely filled, and the joint structure of the filled steel pipe concrete column and the beam. 2. The joint structure of a filled steel tubular concrete column and a beam according to claim 1, wherein a large number of protrusions are formed on at least an end side inner wall of the steel tubular beam. Joint structure of concrete column and beam. 3. A method of joining a beam to a side portion of a steel pipe column in which concrete is filled in the pipe, wherein an opening hole is first formed at a joint position of the steel pipe column,
The inside of the pipe near the end of the steel pipe beam is closed with a partition plate, then the steel pipe beam is fixed to the joining position while covering the opening hole, and then filled from the bottom of the steel pipe column. Press in concrete,
A concrete column filled with steel pipe, characterized in that the entire inside of the pipe of the steel pipe column is densely filled with concrete, and then the concrete that has flowed into the pipe interior of the steel pipe beam from the opening holes of the steel pipe column is also filled up to the partition plate. And beam connection method.