JPH084203A - Steel framed reinforcement beam and execution method thereof - Google Patents

Abstract

PURPOSE:To shorten the construction period and the construction cost for execution of a steel framed reinforced beam by reducing welding parts. CONSTITUTION:Beam top reinforcement 19 is formed longer than steel framed beam 13, the beam top reinforcement 19 positioned on one side of the steel framed beam 13 is projected from one end part of the steel framed beam 13, the beam top reinforcement 19 positioned on the other side is projected from the other end part of the steel framed beam 13. In addition, these beam top reinforcement are constituted so that they are slidably provided in the lengthwise direction of the steel framed beam 13. When a steel framed reinforcement beam 12 of such constitution is constituted between pillars, the beam top reinforcement 19 are slidably arranged so as to be equally divided at the pillar core, and hence welding of the beam top reinforcement 19 is omitted. Hereby, the number of welding parts is reduced compared with that of a customary case, and the construction period and the construction cost required for execution of the steel framed reinforcement beam are remarkably reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel rebar beam and a method for constructing a steel rebar beam connecting the steel rebar beam to a column.

[0002]

2. Description of the Related Art In constructing a structure made of steel reinforced concrete, when joining a steel reinforced beam to a steel reinforced column, for example, as shown in FIG. 6, the steel reinforced column 2 of the steel reinforced column 1 is connected. The joint portion 3 is formed in the region, and the steel frame rebar beam 2 is joined to the joint portion 3.
The joint part 3 forms three steel frames 4 protruding in the horizontal direction on the outer peripheral part of the steel-framed reinforcing bar column 1, and arranges four reinforcing bars (main bars) 5 around each steel frame 4. At the same time, two beam top reinforcements 6 ... Are arranged on the side surface of the steel frame 4 in total, and the ribs 7 are wound around the reinforcing bars 5 and the beam top reinforcements 6. In FIG. 6, four reinforcing bars 5 ...
Are arranged so that their ends are flush with the ends of the steel frame 4. Further, the steel rebar beam 2 is connected to the steel beam 8
4 beam main reinforcements 9 ... are arranged around the circumference of each of them, and 4 beam top reinforcements 10 ... are arranged on both side surfaces of both ends of the steel beam 8, and these beam main reinforcements 9 ... A rib 11 is wound around 10 ..., The beam main bar 9 is arranged so that both ends thereof are flush with both ends of the steel beam 8, and the beam top bar 10 is made of the steel frame. The end of the beam 8 facing the end is arranged so as to be flush with the end of the steel beam 8.

When constructing the steel-framed reinforcing-bar beam 2 between the steel-framed reinforcing-bar columns 1 and 1 facing each other, the steel-framed reinforcing-bars are provided between the facing steel-frames 4 and 4 of the respective joint portions 3 and 3 of the steel-framed reinforcing-bar columns 1 and 1. The beam 2 is arranged, both ends of the steel beam 8 of the steel-framed reinforcing bar beam 2 are connected to the steel frames 4 and 4 by connecting plates (not shown), and the beam main bar 9 and the beam top bar 10 of the steel-framed reinforcing bar beam 2 are connected.
And a reinforcing bar 5 and a top bar 6 arranged around the steel frame 4.
It is done by butt welding and.

[0004]

However, in the construction of the steel-framed reinforcing bar beam 2, there is a problem that the number of welded spots becomes very large. That is, in the case of constructing one steel-framed rebar beam 2 having four beam main bars 8 ... And four top bars 10 ... At the ends, between the columns 1 and 1, the beam main bars 9 ... 8 welding points with the reinforcing bar 5 of No. 3, beam top bar 10 ...
The number of welding points with the beam top reinforcement 6 of the joint portion 3 is 8 points, which is a total of 16 points, which is extremely large, and it takes a lot of time and labor to construct the steel-framed reinforced beam 2. Was needed.

The present invention has been made in view of the above circumstances, and provides a steel-framed reinforcing bar beam and a method for constructing the same which can reduce the construction period and cost of the steel-framed steel beam by reducing the number of welded portions. It is an object.

[0006]

In order to achieve the above object, in the steel-framed reinforcing bar beam according to claim 1 of the present invention, the beam top bar is formed longer than the steel beam, and the beam top bar of the beam top bar is A beam top bar located on one side surface is projected from one end of the steel beam, and a beam top bar located on the other side surface of the steel beam is projected from the other end of the steel beam, and ,
These beam top bars are provided slidably in the longitudinal direction of the steel beam.

According to a second aspect of the present invention, there is provided a formwork panel around the steel-framed reinforcement beam according to the first aspect. The formwork panel stretches a wire mesh on the formwork frame, and On the side surface, a synthetic resin film having a large number of small holes is stretched.

According to a third aspect of the present invention, there is provided a method for constructing a steel-framed reinforcing bar beam, after the steel-framed reinforcing bar beam according to claim 1 or 2 is positioned between columns,
The steel frame of the joint portion projectingly formed on the column is joined to the steel beam of the steel-framed reinforcing bar beam, and then the main bar of the steel-framed reinforcing bar beam is welded to the reinforcing bar of the joint section, It is characterized in that the beam top reinforcement of is slid to the side projecting from the steel beam, and the reinforcement is arranged by dividing the core into equal parts.

[0009]

In the steel-framed reinforcing bar beam according to the first aspect of the present invention, when the steel-framed reinforcing bar beam is installed between columns, the beam top bar of the steel-framed reinforcing bar beam is slid to the side projecting from the steel frame beam, By arranging the bars with the core divided, the welding of the beam top bars can be omitted.

In the steel frame rebar beam of claim 2, concrete is cast in the formwork panel, and after the concrete is hardened, the formwork panel is removed without removing the formwork panel to dismantle the formwork. Since it is possible to save time and labor for carrying out the dismantled formwork, it is possible to improve the work efficiency at the construction site, and only the water in the placed concrete is filled with the fine holes in the film and the wire mesh. Since it can be discharged to the outside through the through, it is possible to reduce the lateral pressure received by the formwork panel.

In the method for constructing a steel-framed reinforcing-bar beam according to claim 3, when the steel-framed reinforcing-bar beam according to claim 1 or 2 is installed between columns, the beam top reinforcement of the steel-framed reinforcing-bar beam is projected from the steel-framed beam. By sliding to the side and arranging the bar cores in equal parts, the welding of the beam top bar can be omitted, which reduces the number of welding points compared with the conventional method, so it is suitable for the construction of steel-framed rebar beams. The required construction period and cost can be greatly reduced. Further, among the beam top reinforcements arranged on the side surface sides of the steel beam, the beam top reinforcements located on one side surface side of the steel beam are projected from one end of the steel beam and the other of the steel beam Since the beam top reinforcement located on the side surface is projected from the other end of the steel frame beam, the steel frame reinforcement beam is inserted laterally between the steel frames of the facing joints and disposed between the steel frames. can do.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show an embodiment of a steel-framed reinforcing-bar beam of the present invention. In these drawings, reference numeral 12 represents a steel-framed reinforcing-bar beam. The steel rebar beam 12 includes a steel beam 13 and four beam main bars 14 disposed around the steel beam 11.
These beam main bars 14 ... Are provided with a plurality of ribs 15 wound so as to surround the steel beam 12. The main beam reinforcements 14 are arranged by a plurality of knitting reinforcements 14a fixed to the steel beam 13 at predetermined intervals in the longitudinal direction.

The steel beam 13 is made of H steel and is formed to have substantially the same length as the distance between the steel frames 18 and 18 of the joints 17 and 17 formed in the columns 16 and 16 facing each other.
The beam main bars 14 are deformed steel bars extending in parallel with the steel beam 13, and are arranged so that both ends thereof are flush with both ends of the steel beam 13. Further, two beam top reinforcements 19 are provisionally arranged on each side surface of the steel beam 13. This temporary bar is composed of the beam top bar 19 and the rib bar 1
It is carried out by inserting it inside 5. Of the beam top bars 19 ... Located on one side of the steel beam 13 2
The beam top reinforcements 19, 19 of the book are provisionally arranged so that one end thereof protrudes from the right end of the steel beam 13 and the other end thereof is flush with the left end of the steel beam 13. In addition, two beam top reinforcements 19, which are located on the other side surface side of the steel beam 13,
19 are provisionally laid out so that one end thereof projects from the left end of the steel beam 13, and the other end thereof is flush with the right end of the steel beam 13. Further, the ribs 15 ... Are steel beam 13
A plurality of bars are arranged at predetermined intervals in the length direction.

When the steel-framed reinforcing-bar beam 12 having the above-mentioned structure is installed between the steel-framed reinforcing-bar columns (only the steel frame is shown in the drawing, the column main bar, the stirrup, etc. are omitted) 16, 16, The reinforcing bar beam 12 is suspended horizontally by a crane or the like, and is positioned between the steel frames 18, 18 of the steel frame reinforcing bar columns 16, 16 facing each other. in this case,
By slightly inclining the steel rebar beam 12 with respect to the straight line connecting the steel frames 18 and 18 in the horizontal plane,
It is possible to easily insert the steel reinforced beam 12 between the eight.
On the other hand, in the joint portions 17 and 17 of the steel-framed rebar columns 16, 16, the reinforcing bars 20 facing the beam main bar 14 are arranged on both side surfaces of the steel frame 18 of the joint portion 17, and both ends thereof are It is made flush with the end of the steel frame 18 of the connection part 17, and
A plurality of ribs 15 ... Are wound around 0 ... so as to surround the steel frame 18.

Next, as shown in FIG. 2 (a), the steel-frame reinforcing bar 12 is rotated in the direction of the arrow so that both end faces of the steel-frame beam 13 of the steel-frame reinforcing bar 12 face the end faces of the steel frames 18, 18, respectively. Then, these end faces are brought into contact with each other, and both end portions of the steel beam 13 and the respective end portions of the steel frames 18, 18 are joined by a connecting plate (not shown). As a result, the steel beam 13 is erected between the columns 16 and 16, and the beam main bar 14 which is flush with the steel beam 13 is arranged in the joints 17 and 17 of the steel rebar columns 16 and 16. The rebar 20 is abutted so as to face it.

Next, the reinforcing bars 2 arranged at the ends of the beam main bars 14 ... And the joints 17, 17 of the steel-framed reinforcing bars 16, 16.
Weld 0 ... Further, the beam top reinforcements 19 ... Provisionally reinforced in the steel frame reinforcement bars 12 are slid to the side projecting from the steel frame beams 13 to arrange the core cores in equal divisions and fixed to the ribs 15. As a result, the steel rebar columns 16,1
The steel-framed reinforced beam 12 is constructed between the six. In addition, in the one steel-frame reinforcing bar beam 12, the beam top bars 19 ... Temporarily arranging on both side surfaces thereof are respectively facing the joint portions 17, 17.
Since the rod cores are slid in the opposite directions toward each other and the pillar cores are equally divided, the beam top reinforcement 19 is arranged only on one side surface side in the one joint portion 17, On the other side surface side of this connection part 17, a beam top reinforcement 19 tentatively arranged on the steel reinforcement beam 12 installed adjacent to the one steel reinforcement beam 12 is slid and arranged. Therefore, the beam top reinforcements 19 are arranged on both side surfaces of the joint portion 17, respectively. When the steel-framed reinforcing bar beam 12 is constructed in this manner, the number of welded portions of the beam main bars 14 ... Is the same as the conventional number, but the welding of the beam top bars 19 arranged in the joint portions 17 ... is unnecessary. Specifically, in this embodiment, the beam main bar 14
Since there are 8 welding points between the reinforcing bar 20 of the connection part 17 and the reinforcing bar 20 of the joint part 17 and the bar top reinforcing bar 19 is slid on the steel reinforcing bar column 16 to arrange the bar top reinforcing bar 19, the welding position of the beam top reinforcing bar 19 is 0 in total, 8 points in total. Since the number of welding points is reduced by 8 compared to the conventional 16 points, that is, the number of welding points is halved, the steel-framed reinforced beam 1
The construction period and cost required for construction 2 can be reduced.

FIG. 3 shows another embodiment of the steel-framed reinforcing bar beam of the present invention. The steel-framed reinforcing bar beam 21 shown in this figure has a configuration in which a form 22 is provided outside the steel-framed reinforcing bar beam 12. The formwork 22 is formed by assembling three formwork panels 23 each having a rectangular plate shape into a groove shape having a U-shaped cross section. The assembly has a U-shaped cross section, and the length of the beam main bar 14 is long. The panel support frames 24 extending in the vertical direction are arranged at three corners of the mold 22 with their openings facing each other, and the stays 26 fixed to both ends of the knitting bar 14a.
By fixing to the panel support frame 24 ...
To the steel beam 13 via the stay 26 and the knitting muscle 14a.
It is carried out by inserting the form frame panel 23 into the facing openings of the fixed panel support frames 24 and fitting them.

As shown in FIGS. 4 and 5, the mold frame panel 23 includes a mold frame 27 and the mold frame 2
The wire mesh 28 stretched around the wire mesh 7 and the film 29 made of synthetic resin stretched on the inner side surface of the wire mesh 28 are mainly constituted. The formwork frame 27 has a rectangular shape, and a plurality of vertically extending reinforcing frames 3 are provided inside the formwork frame 27.
Zeros are formed at predetermined intervals. Also, the wire net 28
Is composed of a wire mesh portion 28a in which a large number of eyes are formed and a plurality of reinforcing ribs 28b extending in the left-right direction. The reinforcing ribs 28b prevent the wire mesh 28 from bending. Further, the film 29 is transparent and has a large number of holes having a minute diameter (for example, 1.0 mm).

Reinforcement frame 30 of the mold frame 27
Are formed with holes 30a at predetermined intervals in the lengthwise direction, and a separator 31 for holding the interval with the steel-framed reinforcing bar beam 12 is inserted into each hole 30a. As shown in FIG. 3, the tip of the separator 31 is connected to the flange portion 13 a of the steel beam 13. In this connection, a connection nut 33 is fixed at a predetermined position of the flange portion 13a, and the connection nut 33 is attached to the separator 3
They are connected by screwing in the tip portion of 1. Then, by these separators 31, the formwork panel 23 is kept at a constant distance from the steel-framed rebar 12,
The bending of the formwork panel 23 at the time of pouring concrete is prevented.

In the steel-framed reinforcing-bar beam 201 having the above-described structure, the steel-framed reinforcing-bar column 1 is made in the same manner as the steel-framed reinforcing-bar beam 12 of the first embodiment.
By being installed between No. 6 and No. 16, it is possible to obtain the same action and effect as those of the steel-framed reinforcing bar beam 12, and also obtain the following action and effect. That is, in the steel-framed reinforced concrete beam 21 of this embodiment, concrete is placed in the formwork 22 assembled by the formwork panel 23 and the concrete is hardened to construct a steel-framed reinforced concrete beam. After that, the frame panel 23 is used as a base for the exterior material of the steel reinforced concrete beam without removing it. At this time, the metal net 28 on the surface of the mold panel 23 makes it possible to prevent the mortar or the like for fixing the exterior material from sticking well, and thus it is possible to prevent the mortar from peeling or cracking. Further, since it is possible to save the labor of dismantling the formwork and the labor of carrying out the dismantled formwork, it is possible to enhance the work efficiency at the construction site, and
Since the formwork panel 23 has a structure in which a film 29 having a large number of minute holes formed therein is stretched on the inner surface of a wire net 28, only the water in the cast concrete is removed.
Since it can be discharged to the outside through the fine holes of 9 and the meshes of the wire net 28, the lateral pressure received by the mold frame panel 23 can be reduced.

Further, since it is possible to visually confirm the placing condition of the concrete from the outside through the wire net 28 and the transparent film 29, when a defective placing place is found, the concrete is vibrated and applied. Improper placement can be promptly eliminated and good homogeneity of concrete can be maintained. Further, since the surface of the cast concrete is covered with the synthetic resin film 29, weathering of the concrete can be prevented and rust can be prevented from occurring on the reinforcing bar.

[0022]

As described above, according to the first aspect of the present invention.
According to the steel-framed reinforced beam, when the steel-framed reinforced beam is installed between columns, by sliding the beam top reinforcement of the steel-framed reinforced beam to the side projecting from the steel-framed beam, and by arranging the column cores in equal divisions, Welding of beam top bar can be omitted. Therefore, since the number of welded portions is reduced as compared with the conventional one, the construction period and cost required for constructing the steel-framed reinforcing beam can be significantly reduced.

According to the steel-framed reinforcing beam of claim 2, in addition to the same effect as the steel-framed reinforcing beam of claim 1, the formwork panel is provided with a wire mesh and the wireframe is stretched over the frame. Since a synthetic resin film with many small-diameter holes formed on the inner surface was stretched, concrete was placed in this formwork panel, and after the concrete was hardened, it was not necessary to remove the formwork panel. By burying it, it is possible to save the trouble of dismantling the formwork and the work of carrying out the dismantled formwork, so it is possible to improve the work efficiency at the construction site, Since only water can be discharged to the outside through the fine holes of the film and further through the meshes of the film, it is possible to reduce the lateral pressure received by the formwork panel.

Further, since the surface of the cast concrete is covered with the synthetic resin film, the weathering of the concrete can be prevented and the rust on the reinforcing bar can be prevented.

According to the method for constructing a steel-framed reinforcing-bar beam according to claim 3, when the steel-framed reinforcing-bar beam according to claim 1 or 2 is installed between columns, the beam top reinforcement of the steel-framed reinforcing-bar beam projects from the steel-framed beam. Welding of the beam top bar can be omitted by sliding it to the column core and dividing it into column cores, etc. This reduces the number of welding points compared to the conventional method, so it is necessary for the construction of steel-framed rebar beams. The construction period and cost can be significantly reduced. Further, among the beam top reinforcements arranged on the side surface sides of the steel beam, the beam top reinforcements located on one side surface side of the steel beam are projected from one end of the steel beam and the other of the steel beam Since the beam top reinforcement located on the side surface is projected from the other end of the steel frame beam, the steel frame reinforcement beam is inserted laterally between the steel frames of the facing joints and disposed between the steel frames. Therefore, it is possible to easily arrange the steel-reinforced bar beams between the columns.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a steel-framed reinforcing bar beam of the present invention.

FIG. 2 is a plan view and a side view of the same.

FIG. 3 is a sectional view showing another embodiment of the steel-framed reinforcing bar beam of the present invention.

FIG. 4 is a side view showing a formwork panel of the steel-framed reinforcing bar beam shown in FIG.

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

FIG. 6 is a plan view and a side view showing an example of a conventional steel-framed reinforcing bar beam.

[Explanation of symbols]

 12, 21 Steel rebar beam 13 Steel beam 14 Beam main bar 16 Steel rebar Column (column) 17 Joint part 18 Steel frame of joint part 19 Beam top bar 20 Reinforcing bar of joint part 23 Formwork panel 27 Formwork frame 28 Wire mesh 29 Film

Claims (3)

[Claims] 1. A steel-framed reinforcing bar beam having a plurality of beam main bars and beam top bars arranged around the steel beam, wherein the beam top bar is formed longer than the steel beam, and the beam top bar is a steel beam. Beam top reinforcement located on one side surface side is projected from one end of the steel frame beam, and beam top reinforcement located on the other side surface side of the steel frame beam is projected from the other end portion of the steel frame beam, Further, these beam top reinforcements are provided so as to be slidable in the longitudinal direction of the steel frame beam. 2. A formwork panel is provided around the steel rebar of claim 1, wherein the formwork panel stretches a wire mesh on the formwork frame, and a small-diameter hole is formed on the inner surface of the wire mesh. A steel-framed reinforcing bar beam comprising a large number of synthetic resin films stretched. 3. A method of constructing a steel-reinforced-steel-reinforced beam according to claim 1 or 2, wherein the steel-reinforced-steel-reinforced beam is joined to the pillar, wherein the steel-reinforced-steel-reinforced-beam is positioned between the pillars, and then is formed to project from the pillar. The steel frame of the joint part is joined to the steel beam of the steel frame reinforcement beam, and then the main bar of the steel reinforcement beam is welded to the reinforcement bar of the joint part, and the beam top reinforcement of the steel reinforcement beam is connected to the steel frame beam. A method for constructing a steel-framed reinforcing bar beam, which is characterized in that the bar is slid to the side projecting from it and the bar cores are divided into equal parts for reinforcement.