JPH0633598A - Buried formwork for pillar/beam connecting part - Google Patents

Abstract

PURPOSE:To improve execution accuracy by arranging a plurality of steel plates having connecting parts to a steelwork beam on both ends outside the pillar main reinforcement, and providing a fireproof formwork outside the steel plate. CONSTITUTION:Steelwork beams 22 are connected with the right and left, the front and rear of a steelwork pillar 21, and reinforcing plates 3 are respectively fixedly secured between the flanges and the webs of the respective steelwork beams 22. A fireproof formwork 2 is integratedly stuck on the outer face of a steel plate 1, and the respective steel plates 1 are arranged outside the pillar main reinforcement 24. Next, the connecting parts 1a of both end parts of the steel plate 1 is connected with the reinforcing plate 3 fixedly secured to the adjoining steelwork beam 22 through a plurality of connecting bolts 5, and concrete C is placed in the connected part. Consequently, the steel plate 1 and the fireproof formwork 2 are formed into a buried formwork, and hence the construction process can remarkably be simplified.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to SRC manufacturing (or RC
The present invention relates to an embedded formwork for a column / beam joint part, which is characterized in that the joint part between the column and the steel frame column is also used as a hoop plate and a concrete driving formwork.

[0002]

2. Description of the Related Art A conventional column / beam joint is, for example, by welding a steel beam 22 to a steel column 21 (middle column, cross H-shaped steel column) as shown in FIG. While connecting
A stiffener 23 or the like is additionally provided to reinforce, and a plurality of column main reinforcements 24 and a large number of hoop reinforcements 25 are arranged around the steel column 21, and in particular, the hoop reinforcement 25 of the joint portion is provided on the web of the steel beam 22. SRC pillars that are installed by inserting into the holes, and a formwork 26 for placing concrete is arranged on the outer periphery of the joint part, and concrete C is placed and joined in the formwork 26. It has a beam joint structure.

[0003]

In the conventional column / beam joint portion, as described above, the hoop streak of the joint portion is inserted through the web of the steel frame beam, or a concrete driving form is provided. It takes a lot of time and labor, such as disposing it around the connection part and removing it, and there are problems in workability, workability, reliability and labor saving.

The present invention was developed in order to address the above-mentioned problems, and the object of the present invention is to serve both as a hoop plate of a joint section and a concrete-casting formwork. The purpose of the present invention is to provide an embedded formwork for the joints of columns and beams that has improved construction accuracy and reliability as well as drastic labor savings.

[0005]

According to the present invention, there are provided a plurality of steel plates each having a connecting portion with a steel frame beam at both end portions, arranged outside the column main bar, and attached as a hoop plate around the joint portion. ,
By providing a fire-resistant formwork fixed to the outside of the steel plate, it doubles as a hoop plate for the joint part and a formwork for driving, facilitating the work and improving the work accuracy and reliability.

[0006]

[Operation] In the column / beam joint, when a plurality of steel plates with fireproof formwork are arranged outside the main bar of the column and the connecting parts at both ends are connected to the steel beam, the steel plates and the fireproof formwork are finished. It functions as a hoop plate and a concrete casting form by defining the periphery of the mouth, and it is easily constructed by placing concrete inside and the steel plate and the fire-resistant outside form are embedded formwork. Therefore, the joint is easily and efficiently constructed with high precision.

[0007]

1 and 2 show a first embodiment of the present invention, and FIG. 3 shows a second embodiment. In FIGS. 1 and 2, 1 is a steel plate, 1 a is a connecting portion with steel frame beams 22 formed at both ends of the steel plate 1, 2 is a fire resistant formwork fixed to the outside of the steel plate 1, and 3 is a steel beam 22. A reinforcing plate fixed between the upper and lower flanges and the web, 4 is a plurality of connecting bolt holes provided in the connecting portion 1a of the steel plate 1, 5 is a connecting bolt, and the steel plate 1 is
It is formed in a transverse L-shape and is formed slightly lower than the distance between the upper and lower flanges of the steel frame beam 22, and both ends thereof are formed in the connecting portion 1a by disposing a plurality of bolt holes 4. Also,
A plurality of bolt holes are also provided in each reinforcing plate 3 fixed by welding between the upper and lower flanges of the steel beam 22 and the web. The refractory mold 2 is made of various refractory materials and is integrally attached to the outer surface of the steel plate 1, and is slightly projected to the upper and lower sides of the steel plate 1 as shown in FIG. 2 (A). Frame 2
The connecting portions 1a, 1a are projected on both sides of. The first embodiment shown in FIGS. 1 and 2 has a plurality of connecting portions 1a for connecting the steel beam 22 at both ends and is arranged outside the column main bar 24 to be mounted as a hoop-shaped plate around the joint portion. (The illustrated example is 4
It is an embedded formwork of a column / beam joint part comprising a steel plate 1 of a set) and a fireproof formwork 2 fixed to the outside of the steel plate 1.

The above-mentioned embedded formwork of the column / beam joint is mainly applied to a cross H-shaped steel column, which is a middle column, as shown in FIG. In the joint portion in which the steel beam 22 is connected to the front and rear by welding or the like, the reinforcing plates 3 are fixed by welding between the upper and lower flanges of the respective steel beam 22 and the web, and the steel plates with the fire-resistant formwork 2 are attached. 1 is arranged on the outer side of the main pillar reinforcement 24, and the connecting portions 1a, 1a at both ends of the steel plate 1 are connected to the respective reinforcing plates 3 fixed to the adjacent steel beam 22 by a plurality of connecting bolts 5. When the steel plate 1 and the fireproof mold 2 are arranged between adjacent steel frame beams 22 (which are easily connected by the bolt holes 4) as shown in the drawing, each steel plate 1 and the fireproof mold 2 are connected to each other. Instead of the conventional hoop muscle through each steel beam 22 and reinforcing plate 3 around the part. Arranged as a hoop plate and a concrete driving mold, concrete C is placed in the joint, and the joint between the SRC-made steel column 21 and the steel beam 22 is easily and accurately constructed. The steel plate 1 and the fire-resistant mold 2 on the outer side are embedded molds, and the construction process is remarkably simplified and easily and efficiently constructed. It has excellent constructability and is effective for its construction accuracy and reliability. Has been improved and significant labor saving has become possible.

The second embodiment of the present invention shown in FIG. 3 is to embed a column / beam joint part in which a steel beam 22 is connected to three directions by a welding means to an SRC steel column 21a applied as a side column. 3 is a built-in form, 11 and 11b are steel plates, 11a is a connecting part of the steel plates, 12a and 12b are fireproof forms, and columns having connecting parts 11a with the steel beam 22 at both ends. A plurality of steel plates 11 and 11b arranged outside the main bar 24 and attached as hoop-shaped plates around the joint, and the steel plates 11 and 11b.
It is an embedded formwork of a pillar / beam joint part provided with fire-resistant formwork 12a, 12b fixed to the outside of the structure. Compared to the first embodiment, the shape of the steel frame column 21a and the steel frame beam 22 are The structure is characterized in that it is composed of three pieces corresponding to the three-way connection, and other structures are similar, and as is clear from the structure, the same operation and effect as in the first embodiment can be obtained. .

The above-mentioned embedded formwork of the column / beam joint is manufactured in advance in a factory or the like. Further, in addition to the joint between the SRC column and the steel beam as in the illustrated example, the invention is similarly applied to the joint between the RC column and the steel beam, and the joint between the RC column and the steel beam. In the section, the connecting portions of the respective steel plates are connected and attached to the end plate fixed to the end portion of the steel frame beam.

[0011]

As described above, according to the present invention, when a plurality of steel plates with a refractory formwork are arranged outside the column main bar and the connecting portions at both ends thereof are connected to the steel beam in the column / beam joint as described above. , Steel plates and fire-resistant formwork define the perimeter of the joint and function as a hoop plate and concrete placing form to replace the conventional hoop streak, and concrete is placed in the joint. The steel plate and the fire-resistant formwork on the outside are embedded molds, so that the workability as well as the workability and reliability are effectively improved, and significant labor saving is possible. I'm running.

[Brief description of drawings]

FIG. 1 is a cross-sectional view (A), a cross-sectional view taken along the line WW (A), a cross-sectional view taken along the line XX (B), and a cross-sectional view taken along the line YY (C) showing the first embodiment of the present invention.

FIG. 2 is a perspective view (A) and an ZZ vertical sectional view (B) of the embedded formwork of the column / beam joint portion of the first embodiment.

FIG. 3 is a transverse sectional view showing a second embodiment.

FIG. 4 is a cross-sectional view (A) and a vertical cross-sectional view (B) showing a conventional example.
Is.

[Explanation of symbols]

 1, 11, 11b Steel plate 1a, 11a Connection part 2, 12a, 12b Fire-resistant formwork 22 Steel beam 24 Column main bar

Claims (1)

[Claims] 1. A plurality of steel plates each having a connecting portion with a steel beam at both ends and arranged outside a column main bar and mounted as a hoop-shaped plate around a joint, and fixed to the outside of the steel plates. An embedded formwork for pillar / beam joints, which is equipped with a fireproof formwork.