JPH06220917A - Frame structure of building - Google Patents

Abstract

PURPOSE:To effect connections between a precast concrete column and the foundation, and between the precast concrete column and steel frame beams without costing much labor in a frame structure of a building consisting of the precast concrete column and steel frame beams. CONSTITUTION:A pedestal section 1A of a hollow precast concrete column 1 is inserted into the foundation 3 easily and, at the same time, an iron frame column 4 connecting iron frame beams 2 is easily inserted into a column capital section 1B of the precast concrete column 1. The pedestal section 1A is filled with curable building material such as non-contraction mortar, etc., from a filling port 1b, and the column capital section 1B is filled with the hardening building material from the upper surface side of the iron frame column 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a frame of a structure composed of columns and beams, and more particularly to a composite frame structure composed of precast concrete columns and steel beams.

[0002]

2. Description of the Related Art As a conventional technique relating to the frame structure of a building, there is one disclosed in Japanese Patent Publication No. 3-64017. That is, as described in the above publication, the frame of buildings such as factories and warehouses having a high floor height and a large span is generally made of steel frame, but the regulation of interlayer deformation of the building and the width-thickness ratio of members are As the restrictions become stricter, it becomes difficult to design only the cross-sectional shape of the steel frame, and the construction cost increases significantly.

Therefore, in the above-mentioned conventional technique, the frame is made up of precast concrete columns and steel beams instead of making the entire frame into a steel frame structure, thereby increasing the rigidity of the columns and suppressing the above deformation. It also tried to improve fire resistance.

[0004]

However, in the above-mentioned conventional technique, the precast concrete columns are embedded and fixed in the foundation by a usual method, and the connection between the precast concrete columns and the steel beam is used as a stake. Since the configuration uses the protruding portion of the PC steel material that is planted in the portion, the above-described effect is obtained, but there is an unsolved problem that it takes a lot of time and labor.

The present invention has been made by paying attention to the unsolved problems of the prior art, and does not impair the advantages of the composite frame structure composed of precast concrete columns and steel beams, and further It is an object of the present invention to provide a frame structure for a structure that can reduce labor.

[0006]

In order to achieve the above object, in a frame structure of a building according to the present invention, at least a column base and a column base of a precast concrete column having a hollow column base are embedded in a foundation. At the same time, a steel column connected to a beam is embedded in the column head of the precast concrete column, and the column base and column head of the precast concrete are filled with a curable building material.

[0007]

According to the present invention, the column base of the precast concrete column is embedded in the foundation, the steel frame column connected to the beam is embedded in the column head of the precast concrete column, and these column base and column head are provided. The precast concrete columns are fixed to the foundation by filling with a hardenable building material such as mortar or concrete, and the beams are fixed to the column heads of the precast concrete columns, so the frame of the building without using anchors, etc. Is built.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 are views showing an embodiment of the present invention, in which FIG. 1 shows a precast concrete column 1 and a steel beam 2.
It is a front view of a part of frame of the structure which consists of. That is, the precast concrete pillar 1 is a cylindrical prism having a hollow portion 1a having a circular cross section formed inside by centrifugal molding, both ends of which are open, and the pillar base portion 1A is
As shown in FIG. 2, which is an enlarged cross-sectional view of the column base 1A and its periphery, the column base 1A is inserted with a margin into the recessed portion 3a of the foundation 3 that is buried below the floor finishing surface FL.

Then, the space between the outer surface of the column base 1A and the inner surface of the recess 3a and the interior of the column base 1A are filled with non-shrink mortar M as a curable building material and hardened, so that the precast concrete column 1 is formed. It is fixed by vertically standing on the foundation 3. The non-shrink mortar M inside the column base 1A
Is a filling port 1 that opens at the column base 1A as shown in FIG.
It suffices to fill from b, the outer surface of the column base 1A and the concave portion 3a.
The upper surface side opening of the space between the inner surfaces may be closed with a sealing material or the like.

Further, for example, by cutting out the tip end of the column base 1A at several places in the circumferential direction, the column base 1 is formed.
Even when A is inserted into the recessed portion 3a, if the inside and outside of the column base 1A are in communication with each other, the non-contractile mortar M filled from the filling port 1b spreads to the space between the outer surface of the column base 1A and the inner surface of the recessed portion 3a. Therefore, only one filling point is required.

On the other hand, a steel frame column 4 connected to the steel frame beam 2 is inserted into the opening of the precast concrete column 1 on the column head 1B side. The steel column 4 is composed of a tubular portion 4A having a square cross section and a horizontal stiffener 4B fixed to the upper end of the tubular portion 4A. In this embodiment, the steel column 4 and its surroundings are plan views. As shown in FIG. 3, the steel beam 2, located near the horizontal stiffener 4B at the top of the tubular portion 4A.
…, 2 are connected.

As shown in FIG. 4, which is an enlarged cross-sectional view of the column head 1B, the tubular portion 4A is inserted into the column head 1B with a margin. The dimension of the tubular portion 4A is such that the insertion length of the tubular portion 4A into the pillar head 1B is 1.5 times the width of the tubular portion 4A in order to join the steel frame beam 2 to the precast concrete column 1 in a stable state. It is desirable to select it so that it is about double the height of the steel beam 2.

Further, in this embodiment, the level adjusting bolt 6b which moves up and down while being screwed into the nut 6a fixed to the lower flange 2a of the steel frame beam 2 is arranged. A donut-shaped iron plate 7a is provided on the end surface of the precast concrete pillar 1 with which the tip of the adjusting bolt 6b abuts.
Is fixed, and a short cylindrical iron plate 7b is fixed along the radially outer edge of the iron plate 7a.

That is, when fixing the steel column 4 to the column head 1B, first, the level adjusting bolt 6b is appropriately advanced and retracted to adjust the vertical position of the steel column 4 so that, for example, the steel beam 2 is brought into a predetermined state. To do. That is, since the vertical position of the steel frame column 4 is easily changed by appropriately moving the level adjusting bolt 6b forward and backward, fine adjustment of the erection accuracy can be easily performed.

After the vertical position of the steel column 4 is determined, the non-shrink mortar M as a curable building material is filled in the steel column 4 from the filling port 4a opened at the central portion of the horizontal stiffener 4B of the steel column 4. To do. Then, since the tops of the steel columns 4 are open, the non-shrink mortar M is also filled in the column heads 1B of the precast concrete columns 1. In addition,
In order to save the filling amount of the non-shrink mortar M,
The lid 8 is placed inside B so that it is located below the tip of the tubular portion 4A.
It is desirable to fix.

The non-shrink mortar M is filled until the whole of the stigma 1B is filled, but leakage from the tip of the stigma 1B can be prevented by the iron plate 7b. In some cases, after adjusting the vertical position of the steel frame pillar 4, the gap between the upper end of the steel plate 7b and the lower flange 2a may be closed with a sealing material or the like. Then, when the filled non-shrink mortar M hardens, the steel column 4 is fixed to the precast concrete column 1. That is, the concrete pillar 1 and the steel beam 2 are joined together. It should be noted that, in order to strengthen such coupling, for example, as shown in FIG.
The stud 9 may be fixed to the outer surface of the cylindrical portion 4A as indicated by the broken line.

As described above, in the present embodiment, the connection between the precast concrete column 1 and the foundation 3 and the connection between the precast concrete column 1 and the steel beam 2 are substantially eliminated without using an anchor or the like. Shrink mortar M
Since only the work of filling is required, workability at the site can be significantly improved. Moreover, since the pillar is the precast concrete pillar 1, the rigidity and fire resistance of the building are improved, and the base for finishing is not required for the pillar, so further labor and cost can be reduced. Since the beam 2 is made of steel frame, a frame structure with a large span is possible.

Further, since it is the precast concrete pillar 1, the assembling work at the site is equivalent to the case where the steel frame column is used, so the construction period is greatly extended compared to the case where the entire frame is made of steel frame. It doesn't happen. From the above, the frame structure of a building as in the present embodiment can be suitably used particularly for a low-rise building with a large span such as a factory or a warehouse.

In the above-mentioned embodiment, the case where the precast concrete column 1 is used has been described, but this may be a precast reinforced concrete column or not limited to a square column, for example, a column. Good. Further, in the above-mentioned embodiment, the case where the non-shrinkable mortar M is used as the curable building material has been described, but the same action and effect can be obtained even with concrete or the like.

Further, in the above embodiment, the entire precast concrete column 1 is tubular, but the parts other than the column base 1A and the column head 1B may not be hollow.
The column base 1A and the column head B may be hollow so that a sufficient amount of non-shrink mortar M to secure the rigidity of the joint can be filled.

[0021]

As described above, according to the present invention,
The connection between the precast concrete columns and foundations and the connection between the precast concrete columns and beams can be achieved by only filling the substantially curable building material,
Compared to the case where the entire frame is made of steel frame, the construction period will not be significantly extended, so it is possible to greatly reduce the labor and cost, and the rigidity and fire resistance of the building will be improved. Various effects of improvement can be obtained.

[Brief description of drawings]

FIG. 1 is a front view showing the configuration of an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view of a joint portion between a precast concrete column and a foundation.

FIG. 3 is a plan view of a joint portion between a steel column and a steel beam.

FIG. 4 is an enlarged cross-sectional view of a joint portion of a precast concrete column and a steel frame column.

5 is a cross-sectional view taken along the line AA of FIG.

[Explanation of symbols]

 1 Precast Concrete Column 1A Column Base 1B Column Head 1a Hollow 2 Steel Beam 3 Foundation 4 Steel Column 4A Tube M Non-shrink Mortar (Hardening Building Material)

Claims (1)

[Claims] 1. A precast concrete column having at least a column base and a column head embedded in the foundation, and a steel column connected to a beam is embedded in the column head of the precast concrete column, and A frame structure of a building, characterized in that column bases and column heads of precast concrete are filled with a curable building material.