JPH06108533A - Work method for connecting pc beam to column - Google Patents

Abstract

PURPOSE:To remarkably reduce the required number of supports remarkably to reduce construction cost and shorten work period by reducing the area of a column-beam connection section remarkably and supporting the end of PC beam members on the upper end of columns. CONSTITUTION:An RC beam 12 is constructed using continuous PC beam members 12a erected between a pair of RC columns 10. Upper stage beam main reinforcements 18 which are later installed separately from the PC beam members 12a are arranged on the upper side of the PC beam members 12a. Lower stage beam main reinforcements 16 and upper stage beam main reinforcements 18 projected from the PC beam members 12a are stacked at a column-beam connection section 20 crossly with each other. The lower stage beam main reinforcements 16 set in X and Y-directions are connected through screw grouts to each other. The column-beam connection section 20 is located in the cross-section of the RC columns 10. The end of the PC beam members 12a in X and Y-directions are placed and supported on the upper end of the RC columns 10. After the PC beam members 12a are supported on the RC columns 10, the column-beam connection section 20 is surrounded by a form work 26 and concrete is field-deposited in it.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for joining a PC beam and a column in which a PC beam member having a main column reinforcement is crossed with each other at a column-beam joining portion.

[0002]

2. Description of the Related Art In recent years, in the construction of buildings such as RC structures and SRC structures, a structure made of PC (precast concrete) such as columns or beams is often used as one of the labor-saving construction methods. By the way, in the case of manufacturing a beam by converting it into a PC as described above, JP-A-64-62534 (E04)
PC disclosed in B 1/22), in which the main beam bars are pre-dried into concrete.
There are beam members. In the case of the PC beam member in which the main beam of the beam is driven in this way, after supporting this between the columns at the site,
By placing the main beam of the beam projecting from the end of the C-beam member in the pillar-beam joint, and surrounding the pillar-beam joint with a formwork, concrete is cast in-situ to form a PC beam member. The columns can be joined to each other and, in turn, the RC beams can be easily constructed.

[0003]

However, in such a conventional method for joining a PC beam and a pillar, the PC beam member is formed sufficiently shorter than the span between the adjacent columns, and the PC beam member projects significantly longer than the span. Since the main pillar of the PC beam member is anchored to the joint, the area of the joint between the pillar and the beam becomes large. For this reason, the area of the formwork that encloses the outside of the joint reinforcement and the main reinforcement of the column in order to cast concrete on the spot increases significantly, making it difficult to install the formwork and requiring a lot of labor and time. At the same time, the amount of concrete placed will increase significantly.

Further, since the beam main bar is simply anchored to the connecting bar at both ends of the PC beam member,
It is necessary to support both ends of the beam member using supporting works,
There has been a problem that extra work is required for attaching and removing the support work, resulting in an increase in construction cost and a longer construction period.

In view of the above-mentioned conventional problems, the present invention significantly reduces the area of the column / beam joint portion, and the PC
By joining the ends of the beam members to the upper ends of the columns, the number of required support works can be greatly reduced, and the construction cost and the construction period of the PC beams and columns can be shortened. The purpose is to provide.

[0006]

In order to achieve the above object, the first joining method of the present invention is to form a PC beam member in which a beam main bar is driven continuously between adjacent columns, and at least 1 Place one end on the top of the pillar to support it,
The beam main bars protruding from the PC beam member are connected to each other via a joint member having a diameter larger than that of the beam main bar in a column-beam joint provided in the cross-sectional area of the column.

In order to achieve such an object, the second joining method of the present invention is provided with two pairs of PC beam members in which the beam main bars are driven in a plurality of upper and lower stages and intersect each other at the column / beam joints. The PC beam members are continuously formed between adjacent columns, and at least one end of the PC beam members is placed on and supported by the upper ends of the columns, and at the bottom of a pair of PC beam members that are linearly opposed to each other. After the butt ends of the beam main bars in the upper step except for, the space necessary to drop the beam main bars of the PC beam member that intersects with this is provided, and after the beam main bars cross and drop in this space. Insert the hired rebar, and between the abutting ends of each beam main bar including the hired rebar, within the column-beam joint provided in the cross-sectional area of the column, through a joint member that has a larger diameter than the beam main bar. Join.

Further, in order to achieve the above object, in the third joining method of the present invention, the main beam of the beam is driven and
A separate beam main bar is added above this beam main bar, and the PC beam member whose end is the end at the column-beam joint, and this PC beam member is crossed at the column-beam joint, and the beam main bar is The driven PC
A beam member, and these PC beam members are continuously formed between adjacent columns, and at least one end is placed and supported on the upper end of the column, and the PC beam member serving as the terminal end The end of the beam main bar that was driven in and the beam main bar that will be attached later,
After arranging the column main bars of the PC beam members that intersect with this,
In the pillar-beam joint provided in the cross-sectional area of the pillar, U-shaped connection is made through a joint member having a diameter larger than the main beam of the beam.

[0009]

With the above construction, in the first joining method of the present invention, the beam main bar projecting from the PC beam member is joined in the column-beam joint provided in the column cross-sectional area. Therefore, the PC beam member can be arranged close to the column, and when the concrete is cast in the joint portion, the area of the formwork surrounding the joint portion can be significantly reduced. Therefore, it is possible to simplify the work of mounting the formwork and significantly reduce the amount of concrete to be cast on site. In addition, by placing and supporting the end of the PC beam member that is brought close to the pillar on the upper end of the pillar,
It is not necessary to use a supporting structure at the end of the supported PC beam member, and the labor of mounting and removing the supporting structure is eliminated. Furthermore, since the beam main bars are connected through a joint member having a larger diameter than this, after the cast-in-place concrete is hardened, this joint member serves as an anchor to prevent the beam main bars from coming out, and the seismic performance is improved. The above is effective.

Further, in the second joining method of the present invention, when the main beam beams are driven in a plurality of upper and lower stages in a pair of PC beam members which are opposed to each other in a straight line direction, the maximum of the pair of PC beam members is increased. Between the butt ends of the beam main bars of the upper stage except the lower stage,
Since the space required to drop the main beam of the PC beam member that intersects with this was provided, and the main beam of the beam was crossed and dropped into this interval part, the reinforcing bar was inserted and joined, so the main bar of the column was driven. The PC beam members can be crossed at the column / beam joints, and the bond strength at the joints can be significantly improved. Even in this case, each column main bar is joined in the column / beam joint provided in the cross-sectional area of the column to reduce the formwork area surrounding the column / beam joint, The installation work is simplified and the amount of concrete cast in place is reduced. Furthermore, P
By mounting the C-beam member on the upper end of the column, it is possible to eliminate the support work of the mounting portion, and prevent the column main bar from slipping out by the joint member having a diameter larger than that of the column main bar.

Further, according to the third joining method of the present invention, the main beam of the beam is driven into one PC beam member whose end is terminated at the column-beam joint, and the beam main bar is separated above the main beam. When the main beam reinforcement of the body is retrofitted, the ends of the driven main reinforcement beam and the retrofitted main beam reinforcement are joined in a U-shape after the column main reinforcement of the PC beam member that crosses this is placed. Therefore, it is possible to remarkably increase the bonding strength of the column main bar which is the terminal end, and it is possible to intersect the PC beam members in which the column main bars are respectively driven at the column-beam joints, thereby significantly improving the bonding strength at this joint. be able to. Even in this case, the area of the formwork surrounding the column-beam joint is similarly reduced to simplify the installation work, reduce the amount of concrete cast on site, and reduce the amount of PC on the top of the column. It is possible to eliminate the support work of the portion on which the beam member is placed, and prevent the column main bar from slipping out by the joint member having a diameter larger than that of the column main bar.

[0012]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. 1 and 2 show a first embodiment of a method for joining a PC beam and a column according to the present invention. FIG. 1 is a sectional side view of an essential part and FIG. 2 is a sectional plan view of an essential part.

That is, in FIGS. 1 and 2, 10 is an RC column,
Reference numeral 12 is an RC beam, and after the RC beam 12 is erected in the horizontal direction on the upper end of the RC column 10 erected vertically,
The RC column 10 is further erected above the C beam 12 in line with the RC column 12 below. The RC column 10 is formed in a rectangular shape in cross section and may be constructed as a PC column as a whole, or may be constructed by using a half PC column formwork, and further, constructed by using an ordinary veneer formwork. You may. A plurality of column main bars 14, 14 ... Are projected from the upper end of the RC column 10, and the column main bars 14, 14 ... of the RC column 10 above are connected to the protruding ends of the column main bars 14, 14. .

The RC beam 12 comprises a pair of RC columns 10 and 1.
It is constructed by using a continuous PC beam member 12a that is installed between 0, and four lower beam main bars 16, 16 ... Which are arranged in parallel in the horizontal direction are driven into the lower portion of this PC beam member 12a. In addition, on the upper side of the PC beam member 12a, the P
Four upper-stage beam main bars 18, 18 ... Arranged separately from the C-beam member 12a and arranged in parallel in the horizontal direction are arranged. The lower beam main bars 16, 16 ... And the upper beam main bars 18, 18 ... Are projected from both ends of the PC beam member 12a by a predetermined amount, and the projecting portions are joined in the column / beam joint 20. ing.

In this embodiment, the RC beam 12 is the RC column 1.
They are arranged so as to cross each other in a cross shape at the upper end portion of 0. Therefore, the four PC beam members 12a are joined in a butted state from the four surface directions of the RC column 10. Then, the lower beam main bars 16, 16 ... And the upper beam main bars 18, which are projected from the PC beam members 12a, 12a ... Which are orthogonal to each other (the horizontal direction in FIG. 2 is the X direction and the vertical direction is the Y direction), 18 are inserted by being inserted between the column main bars 14, 14 and overlapped with each other at the column-beam joint portion 20.

That is, first, the lower beam main bars 16, 16 ... Of the PC beam members 12a, 12a to be associated in the X direction are respectively coupled via the screw grout 22 as a joint member, and then the PC to be associated in the Y direction. Beam member 12
a, 12a drop the lower beam main bars 16, 16 ...
Similarly, they are respectively coupled via the screw grout 22. Next, after arranging the upper beam main bars 18, 18 ... Arranged in the X direction, they are connected to each other via the screw grout 22,
Upper beam main bars 18, 18 arranged in the Y direction on the upper side thereof
Are arranged and each is coupled via a screw grout 22. In the present embodiment, two auxiliary beam main reinforcements 24, 24 are arranged below the upper beam main reinforcements 18, 18 ... Through the column-beam joint 20 in a continuous state.

By the way, the column-beam joint 20 in which the lower beam main bars 16, 16 ... And the upper beam main bars 18, 18 ... Are arranged is provided within the cross-sectional area of the RC column 10.
Then, the P in the X and Y directions, which are butted against each other,
The end portions of the C-beam members 12a, 12a ... Are placed and supported on the upper ends of the RC columns 10. in this way,
After supporting each of the PC beam members 12a, 12a ... on the RC column 10, as shown by the two-dot chain line in FIG.
The beam joint 20 is surrounded by a form 26, and concrete is cast in-situ into the form. Therefore, the lower beam main bars 16, 16
... and the upper beam main bars 18, 18 are buried in the cast concrete, and by hardening the concrete, the lower beam main bars 16, 16 ... and the upper beam main bar 1
8 and 18 are fixed to each other and integrated with the RC column 10.

In the method of joining the PC beam and the pillar according to the present embodiment, the beam main bars 16, 16 ... Are preliminarily driven into the PC beam member 12a before the PC beam member 12a is built on site. Even if it is present, the assembling is possible, and the lower beam main bars 16, 16 ... And the upper beam main bars 18, 18 projecting from the PC beam members 12a, 12a. Are joined in the column-beam joint portion 20 provided in the cross-sectional area of the RC column 10. For this reason, the respective PC beam members 12a, 12a ... Are approached to the RC column 10 (R in the present embodiment).
It can be placed on the upper end of the C pillar 10). Therefore, the area of the mold 26 surrounding the column / beam joint 20 can be small with the PC beam members 12a, 12a ... Arranged, and the work of mounting the mold 26 can be significantly simplified, and Since the volume of the beam joint 20 becomes small,
It is possible to greatly reduce the amount of concrete cast on site.

Further, since the PC beam members 12a, 12a ... Are continuously formed between adjacent RC columns 10 and the respective end portions are placed and supported on the upper ends of the RC columns 10, respectively. In order to support the PC beam members 12a, 12a ..., it is not necessary to use a supporting work as in the prior art, and the labor required for attaching and removing the supporting work is eliminated, and labor can be saved.

Further, the lower beam main bars 1 to be associated with each other
6 and 16 and upper beam main bars 18 and 18 are connected to each other via screw grouts 22 and 22. At this time, the screw grouts 22, 22, ...
Since the diameter is larger than 18, after the cast-in-place concrete in the column / beam joint 20 is hardened, the screw grouts 22, 22 ... Prevents slipping out, and the seismic performance is effective.

3 and 4 show a second embodiment of the present invention,
The same components as those of the first embodiment will be designated by the same reference numerals and redundant description will be omitted. 3 is a cross-sectional side view of the main part, and FIG. 4 is a plan view of the cross-section of the main part.

That is, this embodiment is applied when the beam main bars are driven in the upper and lower stages in the PC beam members 12a, 12a in the X and Y directions. The lower beam main reinforcement 16 is composed of first and second beam main reinforcements 16a and 16b which are vertically arranged at appropriate intervals. That is, when the lower beam main reinforcement 16 has two upper and lower tiers in this manner, the upper first beam main reinforcement 16a becomes an obstacle and the lower beam main reinforcement 16 cannot be incorporated in the X and Y directions.

Therefore, in this embodiment, a required space L is provided between the abutting ends of the first beam main bar 16a of the lower beam main bar 16 in the X direction, and the PC beam member 12a in the Y direction is provided at this space L portion.
By lowering the second beam main reinforcement 16b of the lower beam main reinforcement 16 arranged in the X and Y directions in the column-beam joint 20
You can cross each other.

Then, after the second beam main bar 16b in the Y direction is crossed and dropped into the interval L part, the reinforcing bar 30 is inserted in this interval L part, and the tip portion of the first beam main bar 16a in the X direction is inserted. And the employed reinforcing bar 30 are connected to each other via the screw grout 22. Incidentally, the abutting end of the second beam main bar 16b in the X direction and the first and second beam main bars 16a, 1 in the Y direction.
The abutting ends of 6b are joined by screw grouts 22 as in the first embodiment.

In the present embodiment, as shown in FIG. 4, the lower beam main bars 16, 16 ... In the X and Y directions intersect at the eccentric position of the RC column 10 and the first beam in the X direction. Since the space L is provided between the abutting ends of the main bars 16b, the screw grout 22 on the left side in FIG. 4 for connecting the first beam main bars 16a and the employed reinforcing bars 30 is slightly projected from the RC column 10. It For this reason, the extending portion 32 that receives the projected screw grout 22 is provided so as to project from the RC column 10. Therefore, the PC beam member 12a connected to the extending portion 32 side is fixed by using the supporting work without supporting the end portion of the PC beam member 12a on the upper end of the RC column 10 at the time of building.
The other three PC beam members 12a, 12a ...
Similar to the embodiment, those ends are supported on the upper end of the RC column 10.

Therefore, in this embodiment, the lower beam main bars 16 of the PC beam members 12a, 12a ...
Even if 16 ... Are driven in the upper and lower two steps by the first and second beam main bars 16a and 16b, by interposing the employed reinforcing bar 30 in the upper first beam main bar 16a, X, Y
The lower column main bars 16, 16 ... in the direction can be crossed with each other. Even in this embodiment, the column / beam joint 20
It is possible to reduce the amount of concrete cast on site while reducing the area of the formwork surrounding the to simplify the installation work. In addition, among the four PC beam members 12a, 12a, ... Which face each other from the four sides of the RC column 10, three PC beam members 12a, 12a ,. It is possible to abolish the support work for the storage part.

In this embodiment, the case where the lower beam main bar 16 has a two-step structure is disclosed, but the beam main bar having three or more steps is PC.
Even if the beam member 12a is driven in, X, Y can be obtained by interposing the employed reinforcing bar except the beam main bar at the bottom.
It is possible to cross each pillar main line in the direction.

5 and 6 show a third embodiment of the present invention,
The same components as those of the first and second embodiments will be designated by the same reference numerals and redundant description will be omitted. 5 is a cross-sectional side view of the main part, and FIG. 6 is a cross-sectional plan view of the main part.

That is, in this embodiment, since the present invention is applied to the portion where the RC beam 12 terminates, in this embodiment, one PC beam member 12a arranged in the X direction is a pillar / column.
A pair of PC beam members 12a are arranged in the Y direction so as to be terminated at the beam joint portion 20 and intersect with this. That is, in the case where one PC beam member 12a terminates in this way, the end of the column main bar is simply connected to the column-beam joint 2
Even if concrete is fixed within 0, the supporting strength will be significantly reduced. In this embodiment, the case where the lower beam main bar 16 has one step is shown.

Therefore, in this embodiment, the end of the lower beam main bar 16 of the PC beam member 12a in the X direction, which is the end, is bent upward, and the end of the upper beam main bar 18 to be attached later is bent downward. Then, after crossing the lower beam main bars 16 and 16 of the pair of PC beam members 12a and 12a in the Y direction, the ends of the lower beam main bar 16 and the upper beam main bar 18 in the X direction are threaded with screw grouts 22. It is connected in a U shape. The lower beam main bars 16 and 16 and the upper beam main bars 18 and 18 in the Y direction are coupled to each other via screw grouts 22. Also, R
PC beam member 12a, which is abutted in the three surface directions of C pillar 10,
The ends of 12a ... Are placed and supported on the upper ends of the RC columns 10, respectively. Furthermore, the PC beam member 12 that becomes the terminal end
The auxiliary beam main reinforcement 24 of a is bent into an L shape and anchored to the concrete cast in situ.

Therefore, in this embodiment, after the PC beam member 12a to be the terminal end is installed, the lower beam main bar 16 of the PC beam member 12a in the Y direction is previously installed to the lower beam end. After being arranged above the main reinforcement 16, the lower beam main reinforcement 16 and the upper beam main reinforcement 18, which are the ends of the main reinforcement 16, are connected in a U-shape. Therefore, in this embodiment, the PC beam member 1 is the terminal end.
The coupling strength of the beam main bars 16 and 18 of 2a can be remarkably increased, and the terminal PC beam member 12a into which the lower beam main bar 16 is driven and the pair of PC beam members 12a and 12a in the Y direction are crossed. This makes it possible to significantly improve the bonding strength at this joint.
Further, it is possible to simplify the work for mounting the formwork surrounding the column / beam joint portion 20 and reduce the amount of concrete cast on site.
Further, the supporting work for supporting the PC beam member 12a can be eliminated.

By the way, in each of the above-mentioned embodiments, the case where the screw grout 22 is used to connect the beam main bars to each other is disclosed. However, in addition to this, a joint member having a larger diameter than the column main bar, for example, a sleeve joint is used. It can also be used to bind.

[0033]

As described above, in the method for joining a PC beam and a pillar according to claim 1 of the present invention, the PC beam member is continuously formed between the adjacent columns, and this PC beam is formed. Since the beam main bar protruding from the member is connected in the column / beam joint provided in the cross-sectional area of the column, the area of the formwork surrounding this joint is greatly reduced by bringing the PC beam member close to the column. Therefore, it is possible to simplify the work of mounting the formwork, and it is possible to greatly reduce the amount of concrete to be cast in-place in the formwork. Also, a PC that is close to the pillar
When the end of the beam member is placed and supported on the upper end of the pillar,
There is no need to use a supporting structure at the end of the supported PC beam member, and the labor of mounting and removing the supporting structure is eliminated, and in addition to the simplification of the work of mounting the formwork, a great labor saving is achieved. Can be achieved. Further, since the beam main bar is connected through a joint member having a larger diameter than this, after the cast-in-place concrete is hardened, this joint member serves as an anchor to prevent the beam main bar from coming out,
The seismic performance of beam joints can be significantly increased.

Further, in the method for joining a PC beam and a column according to claim 2 of the present invention, in the case where the beam main bars are driven in a plurality of upper and lower steps in a pair of PC beam members opposed to each other in a straight line direction,
A predetermined gap is provided between the abutting ends of the beam main bars of the upper tier of these pair of PC beam members excluding the lowermost tier, and the beam main bar to be crossed is dropped into this gap, and then the reinforced rebar is interposed. Since they are joined together, it becomes possible to intersect the PC beam members in which the main reinforcements of the columns have been driven, at the column-beam joints, and it is possible to significantly improve the joint strength at these joints.
Even in this case, it is possible to reduce the area of the formwork surrounding the column / beam joint, simplify the mounting work, and reduce the amount of concrete cast on site. Further, the support work can be eliminated by placing the PC beam member on the upper end of the column, and the joint member having a diameter larger than that of the column main bar serves as an anchor to prevent the column main bar from coming off.

Further, in the method for joining a PC beam and a pillar according to claim 3 of the present invention, the main beam of the beam is driven into the PC beam member whose end portion ends at the pillar-beam joint portion, and When a separate beam main bar is added above the beam main bar, the ends of the driven beam main bar and the post-installed beam main bar are placed after the column main bar of the PC beam member that intersects them. Since they are connected in a U-shape, the connection strength of the column main bars at the end can be remarkably increased, and the PCs in which the column main bars are respectively driven
Beam members can be crossed at column-beam joints,
The bond strength at this joint can be significantly improved. Even in this case, the area of the formwork surrounding the column / beam joint is reduced to simplify the mounting work and
The amount of concrete cast in place can be reduced, and the support work for the part where the PC beam member is placed on the upper end of the column can be eliminated, and the column main bar can be prevented from coming out by the joint member with a diameter larger than the column main bar. There are various excellent effects.

[Brief description of drawings]

FIG. 1 is a cross-sectional side view of a main part of a pillar / beam joint to which a joining method according to a first embodiment of the present invention is applied.

FIG. 2 is a cross-sectional plan view of a main portion of a column / beam joint to which the joining method according to the first embodiment of the present invention is applied.

FIG. 3 is a cross-sectional side view of a main portion of a column / beam joint to which the joining method according to the second embodiment of the present invention is applied.

FIG. 4 is a cross-sectional plan view of a main part of a column / beam joint to which the joining method according to the second embodiment of the present invention is applied.

FIG. 5 is a sectional side view of a main part of a column / beam joint to which a joining method according to a third embodiment of the present invention is applied.

FIG. 6 is a cross-sectional plan view of a main portion of a column / beam joint to which the joining method according to the third embodiment of the present invention is applied.

[Explanation of symbols]

10 RC Columns 12 RC Beams 12a PC Beam Members 14 Column Main Bars 16 Lower Beam Main Bars 16a First Beam Main Bars 16b Second Beam Main Bars 18 Upper Beam Main Bars 20 Column / Beam Joints 22 Screw Grouts (Joint Members) 26 Formwork 32 Employed Reinforcing Bars

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[Procedure amendment]

[Submission date] May 14, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0025

[Correction method] Change

[Correction content]

In the present embodiment, as shown in FIG. 4, the lower beam main bars 16, 16 ... In the X and Y directions intersect at the eccentric position of the RC column 10 and the first beam in the X direction. Since the space L is provided between the abutting ends of the main bars 16b, the screw grout 22 on the left side in FIG. 4 for connecting the first beam main bars 16a and the employed reinforcing bars 30 is slightly projected from the RC column 10. It For this reason, the extending portion 32 that receives the projected screw grout 22 is provided so as to project from the RC column 10. Therefore, the PC beam member 12a connected to the extending portion 32 side is fixed by using the supporting work without supporting the end portion of the PC beam member 12a on the upper end of the RC column 10 at the time of building. When connecting the first beam main bars 16a to each other with the reinforcing bar 30,
The following four points will be described in more detail regarding the configuration in which the one screw grout 22 is arranged outside the RC column 10. First, regarding the length L of the employed reinforcing bar 30 inserted between the first beam main bars 16a, in the case of the mechanical joint represented by the screw grout 22 as in this embodiment, at least the length of the screw grout 22 is set. More than double the length is required. This will be described in detail in consideration of the actual construction situation for connecting the employed reinforcing bar 30 and the pair of first beam main reinforcing bars 16a to each other.
First, the two screw grouts 22 are fastened to the employed reinforcing bar 30 in advance from both ends toward the center. At this time, in order to insert the employed reinforcing bar 30 between the first beam main reinforcements 16a as close as possible,
It is necessary to completely tighten the end portion of the screw grout 22 so that the end portion of the screw grout 22 does not protrude from the end portion. As is clear from this, the required length L of the employed reinforcing bar 30 is at least twice as long as the length of the screw grout 22 or more. Then, the employment reinforcing bar 30 in which the screw grout 22 is fastened is inserted between the end portions of the pair of first beam main bars 16a, and then the screw grout 22 is moved in the opposite direction from the employment reinforcing bar 30 side to the first beam main bar 16a side. Perform the work of tightening up. At this time, considering a state in which the screw grout 22 is screwed into the first beam main bar 16a and the employed reinforcing bar 30 half by half, the RC column 10 required to arrange the screw grout 22 inside the RC column 10 is considered. The width dimension of is the sum of the length L of the employed reinforcing bar 30 and the length of one screw grout 22. The width dimension of the RC column 10 is required only from the necessity of the connection structure of the first beam main reinforcement 16a, separately from other technical requirements, and may be wider than necessary for the RC column 10 in some cases. May be On the other hand, as in the present embodiment, if at least one of the screw grouts 22 is arranged outside the RC column 10, the first beam main bar 16 is used for setting the column width dimension.
There is no restriction on the connection structure of a. Second, first
The beam main bar 16a is attached to the RC column 1 from two directions, the X direction and the Y direction.
The RC grove 22 is inserted through the 0 part and crosses each other up and down, and is connected via the reinforced rebar 30 and the screw grout 22 at the RC column 10 part.
When intensively arranging inside the pillar 10, the first beam main bars 16a in the two directions are vertically overlapped with each other, so that the screw grouts 22 may be vertically overlapped with each other. Since the screw grout 22 has an outer diameter dimension that is screwed from the outside to the first beam main bar 16a and the employed reinforcing bar 30, when the screw grouts 22 overlap each other, the screw grouts 22 overlap and cross each other. The vertical distance between the first beam main reinforcements 16 a in the direction increases by an amount corresponding to the outer diameter dimension of the screw grout 22. In other words, in consideration of the effective beam fault regarding the cross section of the beam 12, the case where the first beam main bars 16a in the X and Y directions are directly in contact with each other and the case where the first beam in the X and Y directions is overlapped as described above. Comparing with the case where the main bars 16a are overlapped with each other at intervals substantially corresponding to the outer diameter dimension of the screw grout 22, in the former case, the first beam main bars 16a in both directions are arranged as outward as possible in the cross section of the beam 12. On the other hand, in the latter case, the first beam main bar 16a in any one direction has to be arranged inside by an amount corresponding to the outer diameter dimension of the screw grout 22, and in the latter case, the outer part of the screw grout 22 is not supported. There is a loss in structural strength corresponding to the diameter dimension. On the other hand, as in the present embodiment, the screw grout 22 used for connecting the first beam main reinforcement 16a in either one of the X direction and the Y direction may be arranged outside the RC column 10. For example, it is possible to prevent the screw grouts 22 from vertically overlapping with each other, and
It is possible to prevent the overlap between the beam main bars 16a from increasing. As a result, the effective cross section of the beam 12 can be increased, and sufficient strength against bending and shearing applied to the beam 12 can be ensured. Thirdly, the fact that the screw grouts 22 do not overlap in the column-beam joint means that the degree of intricacy of the bar arrangement can be moderated, and mutual interference can be prevented in the relationship with the column main bar 14. Since it is possible to avoid a tightly intricate state, there is a margin in the accuracy of the bar reinforcement construction of the column main bar 14 and the first beam main bar 16a.
Can be made to absorb construction errors, etc.
Person, it is possible to improve the filling of the poured concrete,
Furthermore, secure a margin for inserting the vibrator.
You can also Fourth, screw grout on the outside of the RC column 10.
If the torches 22 are provided, all the first beam main bars 16a
For the number, some of them are outside the RC pillar 10.
Connection work can be done, and it will be connected in the column-beam joint
The number of the first beam main bars 16a to be worked is reduced.
Therefore, the connection work can be facilitated. still,
The other three PC beam members 12a, 12a ... Have their ends supported on the upper ends of the RC columns 10 as in the first embodiment.

Claims (3)

[Claims] 1. A PC beam member in which a beam main bar is driven is continuously formed between adjacent columns, and at least one end is placed and supported on the upper end of the column, and the PC beam member is A PC characterized in that the protruding beam main bars are connected to each other through a joint member having a diameter larger than that of the beam main bars in a column-beam joint provided in the cross-sectional area of the column.
Beam and column joining method. 2. The main beam is driven into the upper and lower stages,
Comprises two pairs of PC beam members that intersect each other at the beam joints,
These PC beam members are continuously formed between the adjacent columns,
At least one end is placed and supported on the upper end of the pillar, and intersects between the abutting ends of the beam main bars of the upper stage except the lowermost stage of the pair of PC beam members that are linearly opposed to each other. The space required to drop the beam main bar of the PC beam member is provided, the beam main bar is crossed and dropped into this space portion, and then the employment rebar is inserted, and each beam main bar including the employment rebar is butted. A method for joining a PC beam and a column, characterized in that the ends are joined together through a joint member having a diameter larger than the main beam of the beam in the column-beam joint provided within the cross-sectional area of the column. 3. A PC beam member in which a main beam of a beam is driven and a separate main beam of a beam is retrofitted above the main beam of the beam, and an end portion of the PC beam member ends at a column-beam joint portion. A PC beam member that is crossed at a column-beam joint and has a main beam of a beam embedded therein, and these PC beam members are continuously formed between the columns that are provided so that at least one end is at the upper end of the column. After the column main bar of the PC beam member that crosses the ends of the PC main beam member that has been placed and supported and the end of the main beam of the PC beam member that has been driven in and the post-installed main beam bar of the PC beam member is arranged, The method for joining PC beams and columns is characterized in that the columns are joined in a U-shape through a joint member having a diameter larger than the main beam of the beam in the column-beam joint provided in the cross-sectional area of the column.