JP2000160686A - Composite structure of reinforced concrete column and steel frame beam, and its execution - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a composite structure of a reinforced concrete column and a steel frame beam and its execution method in which a welding quantity can be reduced and workability can be improved, and the fitting work of the steel frame beam to the reinforcing concrete column can be rationalized, and the construction works can be advanced without need to wait for completion of the reinforced concrete column and hence, the construction period can be shortened. SOLUTION: A columnar temporary erection member 3a to be embedded in a reinforced concrete column 1 is erected in a construction position of the reinforcing concrete column 1, while temporarily supporting a plurality of steel frame beams 5a, 5b, 5c crossing with each other on the reinforced concrete column 1, and connection members 7a, 7b are arranged between mutual steel frame beams 5a, 5b, 5c crossing with each other on the columnar temporary erection member 3a. The connection members 7a, 7b and the steel frame beams 5a, 5b, 5c are connected to each other by high tension bolts 13, 19 in order to mutually connect steel frame beams 5a, 5b, 5c.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mixed structure of a reinforced concrete column and a steel beam such as an H-section steel, and a method for constructing the mixed structure.

[0002]

2. Description of the Related Art Conventionally, in a connection portion between a reinforced concrete column and a steel beam, a steel beam which is orthogonal to each other on the column is welded or provided with a covering plate or a diaphragm to restrain the column concrete. The mouth member was prepared in advance by welding, and the pillar and the beam were joined by welding a steel beam orthogonal to the connection member placed on the pillar. Taking the construction of steel beams using connection members as an example, in detail, the connection members and steel beams are separately processed in a steel frame manufacturing plant, assembled by welding, and then brought to the site. A connecting member is installed on a reinforced concrete column by using such a method, and a steel beam is further lifted and welded to the connecting member. As shown in FIG. 7, the connection member may be connected to a pre-assembled column reinforcing bar in some cases.
Also in the illustrated example, the crossing beam portions are welded to the connection member.

[0003] On the other hand, there are mainly two construction methods for connecting a steel beam to a reinforced concrete column. Concrete is cast and reinforced concrete columns are built in advance, and when the cast concrete is sufficiently hardened, steel beams are bridged between the columns. The steel beam is supported by temporary supports and installed in advance at the beam construction site, and then the reinforced concrete columns and the upper-floor slab formwork are assembled. Fill concrete at once. In each case, the construction of reinforced concrete columns was advanced one layer at a time.

[0004]

As described above, in the conventional construction of steel beams, when connecting steel beams, forming joint members, or joining intersecting steel beams to joint members, He used a lot of welding. As described above, the conventional welding work has been mainly used to construct a mixed structure using steel beams, and this welding connection has the disadvantage that the work is complicated, such as beveling, and the work is complicated, and the cost is high. Was. It was also necessary to carry out a welding inspection to confirm the welding quality of the welded joint. Furthermore, welding work on site requires skill and cannot be performed on a rainy day or a windy day, so that there is a problem that the construction period depends on the weather.

[0005] On the other hand, regarding the construction of a reinforced concrete column to which a steel beam is to be joined, there are the following problems since the columns are constructed one layer at a time by any of the above methods. In other words, the use of a crane to lift steel beams requires the use of a plurality of reinforced concrete columns on the same level, after the column concrete has hardened, and the completion of construction of each reinforced concrete column. It is necessary to move the crane according to the conditions and carry out the lifting work. Also, after all the steel beams of the same level are placed on the temporary support, the construction of all the reinforced concrete columns is completed by forming the columns and floor slabs and placing concrete in them. No crane will be used until construction moves to the upper level. As described above, in the conventional method of constructing a reinforced concrete column, the waiting time of the crane is often prolonged, and it has been difficult to operate the crane with high operation efficiency.

Furthermore, in the method of the present invention, since a steel beam is placed on a reinforced concrete column constructed in advance and joined, the work of filling concrete into the gap between the mounted beam and the column top immediately below it is complicated. There was also a problem.

In view of the above, the present invention can reduce the amount of welding work, improve workability, and rationalize the attachment of steel beams to reinforced concrete columns, and wait for the completion of the construction of reinforced concrete columns. It is an object of the present invention to provide a mixed structure of a reinforced concrete column and a steel beam and a method of constructing the same, whereby construction work can be carried out without any trouble and the construction period can be shortened.

[0008]

In order to solve the above-mentioned problems, a mixed structure of a reinforced concrete column and a steel beam according to claim 1 comprises a plurality of steel beams crossing on a reinforced concrete column at a construction site of the reinforced concrete column. While temporarily supporting
Providing a columnar temporary member embedded inside the reinforced concrete column, arranging a connection member between the steel beam beams intersecting each other on the columnar temporary member, and connecting the steel member beams with each other. The steel beams are connected to each other by high-strength bolts.

As described above, since the steel beam is temporarily supported by the columnar temporary member embedded in the reinforced concrete column and embedded in the column, there is no need to provide a temporary support, and the column concrete is not required. Without waiting for the completion of construction of reinforced concrete columns by hardening,
It is possible to precede how to build a steel beam using the columnar temporary member. In other words, apart from the formwork and concrete casting work required to complete the construction of reinforced concrete columns, and the curing period, the method of building steel beams using lifting equipment such as cranes, not only at the same level, By installing a columnar temporary member on the steel beam placed on the columnar temporary member, it is possible to proceed ahead to the upper floor,
Thus, regardless of the progress of the reinforced concrete column construction work progressing for each layer, the construction work of the steel beam can be completed in advance in a short period, and the construction period can be shortened. Along with this, lifting equipment for lifting steel beams can be intensively operated, and its operation efficiency can be improved. After completion of lifting work on steel beams, the crane can be freely operated. Can also be diverted to

[0010] Further, since the columnar temporary member is provided which can temporarily support the steel beam and precede the method of building the steel beam,
When laying concrete to construct a reinforced concrete column, concrete can be poured at once around the beam-to-column connection, and the concrete filling around the connection can be improved. The construction period can be shortened.

Further, the steel beams are connected to each other by high-strength bolts via connecting members, which requires a complicated and costly technique, requires a high degree of skill, and is affected by the weather. Can be reduced, and labor saving and shortening of construction period can be achieved.

Further, a mixed structure of a reinforced concrete column and a steel beam according to claim 2 is characterized in that a band-shaped member is provided on the steel beam so as to surround the reinforced concrete column.

The band-shaped member can restrain the column concrete of the reinforced concrete column in the vicinity of the steel beam, and can form a joint having a strength comparable to the structure using the conventional joint.

According to a third aspect of the present invention, there is provided a method for constructing a mixed structure of a reinforced concrete column and a steel beam, wherein a temporary columnar member for temporarily supporting a plurality of steel beams intersecting on the reinforced concrete column at a construction site of the reinforced concrete column. Then, a connecting member is arranged between the steel beams intersecting each other on the columnar temporary member, and then, in order to connect the steel beams, the connecting member and the steel beams are subjected to high strength. A steel reinforced concrete column is constructed by joining together with bolts to precede the steel erection method, and then arranging a reinforcing bar for the column and placing concrete around the columnar temporary member having completed the steel erection method. It is characterized by the following.

In this construction method, a temporary columnar member for temporarily supporting a steel beam is previously installed at a location where the reinforced concrete column is to be constructed. It is possible to precede the method of constructing a steel beam using the temporary column members without the need to provide a construction work and without waiting for the completion of the construction of the reinforced concrete column due to the hardening of the column concrete, and the process can be carried out one layer at a time. Regardless of the progress of the construction of the reinforced concrete columns, the construction work of the steel beams can be completed in advance toward the upper floor, and the construction period can be shortened. Accordingly, similarly to the first aspect, the operation efficiency of the lifting equipment for lifting the steel beam can be improved.

On the other hand, in the construction work of the reinforced concrete columns, the construction of the pillars can be sequentially carried out by the conventional method around the columnar temporary members, starting from the construction of the preceding steel beam is completed. The construction of the steel beam does not intersect complicatedly, and the construction period can be shortened from this aspect as well.

Further, the steel beam is temporarily supported by the columnar temporary member so as to precede the method of building the steel beam, and when the concrete is poured to construct the reinforced concrete column, it is the same as the first embodiment. In addition, concrete can be poured at once around the beam-column connection, and the construction period can be shortened.

Furthermore, the steel beams are connected to each other by high-strength bolts via connecting members, thereby saving labor and shortening the construction period as in the first aspect.

[0019]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG.
As shown in FIG. 4, a temporary columnar member 3a having a height equivalent to that of the reinforced concrete column 1 is erected at the location where the reinforced concrete column 1 is constructed. In the illustrated example, an H-section steel is shown as the columnar temporary member 3a. The columnar temporary member 3a has a strength capable of temporarily supporting a plurality of steel beams 5a, 5b, 5c intersecting on the reinforced concrete column 1, and is finally embedded in the reinforced concrete column 1. Therefore, it is sufficient for the columnar temporary member 3a to have a strength capable of temporarily supporting the steel beams 5a, 5b, 5c placed thereon, and it is not required to have a strength that enhances the structural strength. Further, the material is not limited to steel, but may be concrete or plastic. Further, the shape of the flat cross section is not limited, such as circular or square. In short, the columnar temporary member 3a of the present embodiment
Are different from the members constituting the so-called SRC structure. The columnar temporary member 3a is applied to each reinforced concrete column 1 of each layer, and therefore, as shown in the figure, the steel beams 5a, 5b, 5
It is arranged immediately below and directly above c.

As described above, the top of the columnar temporary member 3a finally buried inside the reinforced concrete column 1 is temporarily supported by the columnar temporary member 3a at the stage before the reinforced concrete column 1 is constructed, and the H-shaped steel is formed. Such as steel beams 5a, 5b,
5c is placed. In the illustrated example, the first steel beam 5
a is placed on the columnar temporary member 3a in a beam penetrating arrangement, and the second steel beam 5 intersecting with the first steel beam 5a
Reference numerals b and 5c are mounted on the columnar temporary member 3a so as to sandwich the first steel beam 5a. Regardless of the illustrated example, it is a matter of course that four vertical and horizontal steel beams may be arranged to abut each other immediately above the columnar temporary member. In the example shown in the drawing, the steel beams are placed on the columnar temporary members in the center of the building, where the steel beams intersect vertically and horizontally. Is placed.

The connection structure of the steel beams 5a, 5b, 5c intersecting on the columnar temporary member 3a and the structure of temporarily supporting the steel beams 5a, 5b, 5c on the columnar temporary member 3a will be described. I do.

The columnar temporary member 3a made of H-shaped steel located immediately below the first steel beam 5a is provided with a set of support brackets 9a at the upper end thereof for attaching a lower splice plate 7a described later. As shown in the figure, these support brackets 9a are formed in an L-shaped cross section, and one side of each of them is joined to both sides of the web of the columnar temporary member 3a and a pair of flanges by bolts and nuts 11a, respectively. The other side surface is arranged so as to be substantially flush with the top of the columnar temporary member.

On the support bracket 9a attached to the temporary columnar member 3a in this manner, the connection formed along the direction of disposition of the second steel beams 5b, 5c arranged with the first steel beam 5a interposed therebetween. A lower splice plate 7a as a member is attached via bolts and nuts 11a.
In the illustrated example, the lower splice plate 7a is formed in a substantially rhombic shape that is wide at the position of the columnar temporary member 3a coinciding with the column core of the reinforced concrete column 1 and gradually narrows as the distance from the column center position increases. ing. The lower splice plate 7a has high-strength bolts 13 for connecting the first steel beam 5a and the second steel beams 5b, 5c to the lower splice plate 7a in addition to the bolt holes for joining with the support bracket 9a.
Are formed at appropriate positions.

The first steel beam 5a and the second steel beams 5b, 5c are placed on the lower splice plate 7a. In the illustrated example, further, on both surfaces of the web of the first steel beam 5a, the two steel beams 5b, 5c are projected toward the web of the second steel beams 5b, 5c at positions where the second steel beams 5b, 5c are connected. Are connected in advance by welding. Bolt holes for connecting the connection bracket 15 and the second steel beams 5b and 5c with high-strength bolts 17 are formed at appropriate positions in the webs.

Further still, on these first steel beam 5a and second steel beam 5b, 5c connected to each other,
An upper splice plate 7b having the same shape and the same arrangement as the lower splice plate 7a is placed, and a high-strength bolt 19 for connecting the first steel beam 5a and the second steel beam 5b, 5c also to the upper splice plate 7b. Are formed at appropriate positions. First steel beam 5a
Bolt holes corresponding to the bolt holes of the upper and lower splice plates 7a and 7b are formed in the second steel beams 5b and 5c.

Then, the first steel beam 5a and the second steel beam 5b, 5c and the upper and lower splice plates 7a, 7b disposed therebetween are connected to the high-strength bolts 13, 1 respectively.
9, the first steel beam 5a and the second steel beam 5b, 5c are directly connected to each other by the high-strength bolt 17 via the connection bracket 15, so that the first steel beam 5a and the second steel beam 5b, 5c are connected to the columnar temporary member 3a via the support bracket 9a. While temporarily supporting the steel beams 5a, 5b, 5c, the steel beams 5a, 5b, 5c are connected to each other on the columnar temporary member 3a.

In the illustrated example, the lower end of the columnar temporary member 3b is joined to the upper splice plate 7b via a pair of support brackets 9b.
In this way, by temporarily installing columnar temporary members etc. with the same configuration for the upper story steel beams and providing temporary support, it is possible to precede the method of building steel beams before concrete casting work such as reinforced concrete columns it can.

On the other hand, for the columnar temporary members 3a, the steel beams 5a, 5b, 5c temporarily supported by the columnar temporary members 3a are provided.
After the completion of the construction, the reinforced concrete columns 1 are constructed by a normal construction method. That is, the steel beam 5a,
Around the columnar temporary member 3a for which the temporary support of 5b and 5c has been completed, reinforcing bars for columns such as the column main reinforcement 21 and the shear reinforcement 23 are arranged and a formwork is erected, and then concrete is placed inside the formwork. By casting, the reinforced concrete column 1 can be constructed.

FIG. 5 shows a state of stress transmission in the mixed structure of the reinforced concrete column 1 and the steel beams 5a, 5b, 5c of the above embodiment. As shown in the figure, at the beam-to-column connection, the columnar temporary members 3a, 3b and the splice plates 7a, 7b, which are embedded in the reinforced concrete column 1 in a relation of connecting the steel beams 5a, 5b, 5c and the reinforced concrete column 1, are provided. Furthermore, high strength bolts 13, 17, 19
Etc. are arranged, long-term load due to the building's own weight,
When a short-term load such as an earthquake is applied, the columnar temporary members 3a, 3b and the splice plates 7a, 7b exert an effective bearing effect, and transmit stress from the steel beams 5a, 5b, 5c to the reinforced concrete column 1. High effect can be secured.

The construction procedure of the mixed structure of reinforced concrete columns and steel beams constructed as described above will be described.
First, a columnar temporary member 3a is erected at a location where the reinforced concrete column 1 is constructed. In this installation work, as described above, a support bracket joined by a bolt and a nut to an upper splice plate on a steel beam temporarily supported by a columnar temporary member (not shown) on the lower floor is used. That is, by joining the lower end of the columnar temporary member 3a to the support bracket via bolts and nuts, the columnar temporary member 3a is placed on the steel beam on the lower floor.
a is erected. Further, although not shown, when the columnar temporary member is erected on the foundation concrete, a support bracket may be fixed to the foundation concrete and the columnar temporary member may be joined thereto.

Next, a support bracket 9a is attached to the upper end of the standing columnar temporary member 3a via a bolt / nut 11a.
And the first steel beam 5a and the second steel beam 5 crossing each other on the support bracket 9a.
b, 5c, lower splice plate 7a
Are joined by bolts and nuts 13. Thereafter, the first steel beam 5a and the second steel beams 5b, 5c are placed on the lower splice plate 7a. At this time, the steel beams 5a, 5b,
Since 5c can be handled as a single material, the steel beam can be lifted using a small crane such as a crawler crane.

Next, the steel beams 5a, 5b, 5c are connected to the lower splice plate 7a by the high-strength bolts 13, and the webs of the second steel beams 5b, 5c are connected to the connecting bracket 15 joined to the first steel beam 5a. Are connected via a high-strength bolt 17. Further, the upper splice plate 7b is placed on the steel beams 5a, 5b, 5c, and these are connected to each other by the high-strength bolts 19. Thereby, the first and second steel beams 5a, 5
b and 5c are temporarily supported on the columnar temporary member 1a, and the method of building the steel frame at that location is completed.

Regarding the method of building a steel frame by the above procedure, regardless of the progress of the construction of the reinforced concrete columns, the construction can be sequentially advanced from the lower floor to the upper floor prior to the construction.

On the other hand, although not shown in detail, the reinforced concrete column 1 is provided with a column main reinforcing member 21 and a shear reinforcing bar 23, which are column reinforcing bars, around the columnar temporary member 3a, and the outside thereof is surrounded by an on-site formwork. , Cast in-place concrete into the inside, and reinforced concrete column 1
To build. In this case, the steel beam 5
If the slab formwork is arranged between a, 5b, and 5c, concrete can be poured at once from the slab to around the beam-to-column connection, and over the columns, and the efficiency of concrete placing work can be improved.

As described above, in the mixed structure of the reinforced concrete column 1 and the steel beams 5a, 5b, 5c according to the present embodiment and the construction method thereof, the steel column is provided by the columnar temporary member 3a embedded inside the reinforced concrete column 1. Since the beams 5a, 5b and 5c are temporarily supported, the temporary temporary members 3a can be used without having to provide a separate temporary support and waiting for the completion of the construction of the reinforced concrete column 1 by hardening of the column concrete. Steel beams 5a, 5
b, 5c can be constructed in advance. That is, apart from the formwork and concrete casting work necessary for completing the construction of the reinforced concrete column 1 and the curing period, the steel beams 5a, 5a, 5c using lifting equipment such as cranes are used.
b, 5c can be built not only on the same level, but also on the upper story by installing the columnar temporary members 3b on the steel beams 5a, 5b, 5c placed on the columnar temporary members 3a. Therefore, regardless of the progress of the reinforced concrete column construction work progressing one layer at a time, the construction work of steel beams can be completed in advance in a short period of time, and the construction period can be shortened. it can. Along with this, lifting equipment for lifting steel beams can be intensively operated, and its operation efficiency can be improved. After completion of lifting work on steel beams, the crane can be freely operated. Can also be diverted to

Further, since the columnar temporary members 3a which temporarily support the steel beams 5a, 5b, 5c and can precede how to build the steel beams 5a, 5b, 5c are provided, it is necessary to construct the reinforced concrete column 1. When pouring concrete, concrete can be poured at once around the beam-column joint, the filling property of the concrete around the joint can be improved, and the construction period can be shortened from this aspect as well. .

Further, the steel beams 5a, 5b, 5c are
Splice plates 7a and 7b and connection bracket 15
Are connected by high-strength bolts 13, 19, and 17, which requires complicated and costly work, requires a high degree of skill, and reduces welding work that is affected by the weather, thereby saving labor in construction. And shortening the construction period.

Further, the construction work of the reinforced concrete column 1 can be carried out by a conventional method around the columnar temporary member 3a in order from the construction of the preceding steel beams 5a, 5b, 5c is completed. In the construction work, the construction of the column 1 and the construction of the steel beams 5a, 5b, 5c do not intersect in a complicated manner, and the construction period can be shortened from this aspect as well.

In the present embodiment, the H-shaped steel is used as the columnar temporary members 3a and 3b, and the H-shaped steel is cut to a height equivalent to a reinforced concrete column and a bolt hole is formed in the H-shaped steel. With such a simple process, it can be easily applied to the site. Also, support brackets 9a, 9b
And the form of the splice plates 7a and 7b is also simple,
Easy processing and excellent workability. Furthermore, since the splice plates 7a and 7b are formed in a wide rhombic shape with the pillar core, the splice plates 7a and 7b are slightly projected around the beam-column connection, and the concrete is cast around the beam-column connection. The filling of concrete can be ensured without hindering installation. The connection between the first steel beam 5a and the second steel beam 5b, 5c is mainly connection between the upper and lower splice plates 7a, 7b by high-strength bolts 13, 19, and the first and second steel beam 5a. , 5b, 5c is a simple plate-like connection and can be made by the connection bracket 15 which is simply welded to both surfaces of the web of the first steel beam 5a. The steel beams 5a, 5b, 5c can be connected to each other. As described above, the steel beams 5a, 5b, 5c, the columnar temporary members 3a, 3b, the support brackets 9a, 9b, and the splice plates 7a, 7
b, When manufacturing the connection bracket 15 at a factory or the like,
All you have to do is cut the steel material and form the bolt holes, and it is easy to process and can be made at low cost.
In this respect, costs can be reduced.

FIG. 6 shows a modification of the above embodiment. In this modification, the reinforced concrete column 1 extends between the first steel beam 5a and the second steel beam 5b, 5c.
Plate 2 as a band-like member surrounding the upper end and the lower end of the joint to increase the strength and toughness of the beam-column connection
5 are joined. The band plate 25 can restrain the column concrete of the reinforced concrete column 1 in the vicinity of the steel beam, and can form a beam-column joint having a strength comparable to a structure using a conventional joint member.

[0041]

As described above, according to the mixed structure of the reinforced concrete columns and the steel beams according to the first aspect, the steel beams are temporarily provided by the columnar temporary members provided at the construction site of the reinforced concrete columns and embedded inside the columns. Since it is a structure to support, it is not necessary to provide a temporary support, and also, without waiting for the completion of the construction of the reinforced concrete column due to hardening of the column concrete, advance the method of building the steel beam using the columnar temporary member Can be. In other words, apart from the formwork and concrete casting work required to complete the construction of reinforced concrete columns, and the curing period, the method of building steel beams using lifting equipment such as cranes, not only at the same level, By installing a columnar temporary member on the steel beam placed on the columnar temporary member, it is possible to proceed ahead to the upper floors, thereby progressing the construction work of reinforced concrete columns that can be advanced one layer at a time Regardless of this, the construction work of the steel beam can be completed in advance in a short period, and the construction period can be shortened. Along with this, lifting equipment for lifting steel beams can be intensively operated, and its operation efficiency can be improved. After completion of lifting work on steel beams, the crane can be freely operated. Can also be diverted to

In addition, the provision of the columnar temporary member which can temporarily support the steel beam and precede the method of building the steel beam is provided.
When laying concrete to construct a reinforced concrete column, concrete can be poured at once around the beam-to-column connection, and the concrete filling around the connection can be improved. The construction period can be shortened.

Further, the steel beams are connected to each other by high-strength bolts via connecting members, which makes the welding work complicated, costly, requires skill, and depends on the weather. Can be reduced, and labor saving and shortening of construction period can be achieved.

Further, according to the mixed structure of the reinforced concrete columns and the steel beams according to the second aspect, the column concrete of the reinforced concrete columns in the vicinity of the steel beams can be restrained by the band-shaped members, and the structure using the conventional connection member can be obtained. It is possible to form a joint having a strength comparable to that of the first embodiment.

On the other hand, according to the construction method of the mixed structure of the reinforced concrete columns and the steel beams according to the third aspect, first, the columnar temporary members for temporarily supporting the steel beams are installed in advance at the construction sites of the reinforced concrete columns. Therefore, in the same manner as in claim 1, it is not necessary to separately provide a temporary support, and also, without waiting for the completion of the construction of the reinforced concrete column due to the hardening of the column concrete, the method of constructing the steel beam using the columnar temporary member is used. Regardless of the progress of the reinforced concrete column construction work that can be performed at each level, the construction work of steel beams can be completed in advance toward the upper floor, shortening the construction period Can be. Accordingly, similarly to the first aspect, the operation efficiency of the lifting equipment for lifting the steel beam can be improved.

On the other hand, in the construction work of the reinforced concrete columns, the construction of the pillars can be sequentially carried out by the conventional method around the columnar temporary members, starting from the construction of the preceding steel beam is completed. The construction of the steel beam does not intersect complicatedly, and the construction period can be shortened from this aspect as well.

Further, the steel beam is temporarily supported by the columnar temporary member so as to precede the method of building the steel beam. When concrete is poured to construct a reinforced concrete column, it is the same as the first embodiment. In addition, concrete can be poured at once around the beam-column connection, and the construction period can be shortened.

Further, the steel beams are connected to each other by a high-strength bolt via a connecting member, so that the construction can be labor-saving and the construction period can be shortened as in the first aspect.

[Brief description of the drawings]

FIG. 1 is a front view showing a column-beam joint structure according to an embodiment of the present invention.

FIG. 2 is an explanatory view showing an assembled state and an assembled state of a column-beam joint structure according to one embodiment of the present invention.

FIG. 3 is a view showing a main part of a column-beam joint structure according to an embodiment of the present invention. (A) is a front sectional view of the same structure,
(B) is a side sectional view of the same structure.

FIG. 4 is a view showing a main part of a column-beam joint structure similar to FIG. 3; (A) is a sectional view taken along the section B shown in FIG. 3,
FIG. 4B is a cross-sectional view taken along a cross section C shown in FIG. 3.

FIG. 5 is an explanatory view showing transmission of stress from a beam to a reinforced concrete column in the column-beam joint structure according to the first embodiment of the present invention.

FIG. 6 is a front view showing a main part of a column-beam joint structure according to another embodiment of the present invention.

FIG. 7 is a perspective view showing a joint structure between a reinforced concrete column and a steel beam in a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Reinforced concrete column 3a, 3b Temporary columnar member 5a, 5b, 5c, 33 Steel beam 7a, 7b Splice plate 9a, 9b Support bracket 11a, 11b Bolt and nut 13, 17, 19 High-strength bolt 15 Connection bracket 21, 35 Column Main reinforcement 23, 37 Shear reinforcement 25 Band plate 31 Cover plate

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Katsuhisa Nishimura 4-33 Kitahama Higashi, Chuo-ku, Osaka-shi, Osaka F-term in Obayashi-gumi head office (reference) 2E125 AA04 AA14 AB01 AB12 AC04 AC07 AC15 AG03 AG12 BB02 BB22 BD01 BE05 CA05 EA33

Claims (3)

[Claims] At a construction site of a reinforced concrete column, a plurality of steel beams intersecting on the reinforced concrete column are temporarily supported, and a columnar temporary member embedded inside the reinforced concrete column is provided. A connecting member is provided between the intersecting steel beams, and the connecting members and the steel beams are connected to each other by high-strength bolts to connect the steel beams to each other. Mixed structure of beams. 2. A mixed structure of a reinforced concrete column and a steel beam according to claim 1, wherein a band-shaped member is provided around the reinforced concrete column on the steel beam. 3. A columnar temporary member for temporarily supporting a plurality of steel beams intersecting on the reinforced concrete column is provided at a location where the reinforced concrete column is constructed, and then the steel beam beams intersecting each other on the columnar temporary member are provided. A connecting member is disposed therebetween, and then, in order to connect the steel beams, the connecting member and the steel beams are joined to each other with high-strength bolts to precede the steel building method. A method of constructing a mixed structure of a reinforced concrete column and a steel beam, wherein a reinforcing steel for a column is laid around the columnar temporary member which has been completed, and concrete is cast to construct a reinforced concrete column. .