JP2021063405A - Building beam-column joining method and building beam-column joining structure - Google Patents

Abstract

To provide a building beam-column joining method and a building beam-column joining structure capable of constructing a building by suppressing concrete placement at the site.SOLUTION: A beam-column joining structure 10 is composed of a first structure 10a and a row-shaped structure 10b forming a terminal row, and has column members 11a to 14e made of precast concrete (PCa) and beam members 20a to 20e made of PCa. The first structure 10a is formed by repeating that column members 11b, 12b, 13b are joined onto the column members 11a, 12a, 13a, and the beam members 20a, 20b, 20c are slid toward the column members 11b, 12b, 13b to be joined to the column members 11b, 12b, 13b. The row-shaped structure 10b on which column members 14c to 14e are placed on upper surfaces of column members 14a and 14b on the lower floor in a shifted manner is slid in a first horizontal direction, and is joined to the first structure 10a via a connecting reinforcing bar 26.SELECTED DRAWING: Figure 7

Description

The present invention relates to a beam-column joining method of a building provided with a column member and a beam member made of precast concrete, and a beam-column joining structure of a building.

Conventionally, when constructing a building, in order to reduce concrete placement at the site, precast concrete column members and beam members manufactured in advance at a factory may be used (see, for example, Patent Document 1). In the beam-column joint structure described in this document, through holes are formed in the horizontal direction at the column joints of PCa (precast concrete) columns, and connecting reinforcing bars for beams are provided from one end surface in the longitudinal direction of the girder. It is projected, and a plurality of beam sleeves are installed inside the other end face. Further, by penetrating the beam connecting reinforcing bar of the girder through the through hole of the column joint of the PCa column and inserting it into the beam sleeve of the adjacent girder that has already been installed, the girders can be connected to each other. Join through.

Japanese Unexamined Patent Publication No. 2006-225897

As described above, in a building constructed by using precast concrete (PCa) column members and beam members, the column members including the joints and joints to be arranged last are in two directions that are not linear. It is necessary to join with the member of. For this reason, the last member could not be slid and arranged in one direction, and was formed by placing concrete at the site.

A beam-column joining method for a building to solve the above problems is a beam-column joining in a beam-column structure composed of a beam member made of precast concrete (PCa) and a beam member made of PCa joined to a joint. It is a method, in which a column-beam structure composed of a column member and a beam member is provided, and a first structure before construction of a terminal row is formed in a state where a joint surface facing the terminal row is exposed. Then, a row structure formed by joining beam members between the joints of the end row is placed on a column member on the lower floor of the row structure, and the row structure and the row structure are placed. It is joined to the first structure by sliding in the first horizontal direction toward the beam member having the joint surface of the same layer.

The beam-column joint structure of the building for solving the above problems is a beam-column joint structure composed of a column member made of precast concrete (PCa) and a beam member made of PCa joined to the joint. , A column-beam structure composed of a column member and a beam member, formed in a state where the joint surface facing the end row is exposed, and the first structure before construction of the end row and the end. It is composed of a row structure of the terminal row formed by joining beam members between the joint portions of the row, and the row structure protrudes from the joint surface of the first structure. It is joined to the first structure via a reinforcing bar and does not have a concrete-cast portion at the site.

According to the present invention, it is possible to construct a building while suppressing concrete placement at the site.

The perspective view explaining the beam-column joint structure in embodiment. It is a perspective view of the column member which constitutes the column-beam joint structure in embodiment, (a) is a column member arranged at a corner, (b) is a column member arranged at a side part other than a corner, (c). Is a column member placed at the corner of a row structure. It is a perspective view of the beam member constituting the column-beam joint structure in an embodiment, (a) is a beam member joined to a column member, and (b) is a beam member which penetrates a column member and is joined to a beam member. .. It is a side view explaining the method of forming the 1st structure in an embodiment, (a) is a state where a beam member is joined to a column member at an end, (b) is a state where a column member is joined, and (c) is a state. The state where the beam member is joined to the column member of (b) is shown. It is a top view explaining the method of forming the 1st structure in an embodiment, (a) is a state where a beam member is joined to a column member at an end, (b) is a state where a column member is joined, and (c) is a state where the column member is joined. (B) is a state in which a beam member is joined to a column member, (d) is a state in which a column member at an end is joined, (e) is a state in which a beam member is further joined, and (f) is the end of the first structure. The state where the beam members of the above are joined, (g) shows the state where the first structure is completed. It is explanatory drawing explaining the method of forming a row structure in an embodiment, (a) is a state of joining a beam member to a column member at an end, (b) is a state of joining a column member, (c) is a state of joining. The state where the column member at the end is joined to the beam member is shown. It is explanatory drawing when sliding a row structure in an embodiment, (a) is a plan view, (b) is a side view of a main part. It is explanatory drawing of arrangement of the pressing jig used at the time of sliding of the row structure in embodiment, (a) is the enlarged side view of the main part, (b) is excluding the column member and the beam member of the upper layer. Top view of the state. It is explanatory drawing of the column-beam joint structure in the modified example, (a) is a structure including a row structure having an arc shape, (b) is a structure including a row structure arranged diagonally in a row, ( c) shows a structure including a plurality of row structures. In the modified example, it is an explanatory view of the arrangement of the pressing jig for sliding the row structure by pulling, (a) is an enlarged side view of a main part, and (b) is a state excluding the upper pillar member. Plan view of. A side view of a main part of a beam-column joint structure in a modified example.

Hereinafter, an embodiment in which the beam-column joining method of the building and the beam-column joining structure of the building are embodied will be described with reference to FIGS. 1 to 8.
As shown in FIG. 1, the beam-column joint structure 10 is composed of a plurality of columns 11, 12, 13 and a plurality of beam members 20a, 20b, 20c, 20d, 20e arranged between the columns. In the following description, parts having the same structure are designated by the same reference numerals, and detailed description thereof will be omitted. In this embodiment, a rectangular parallelepiped having a quadrangular cross section is used as each of the columns 11, 12, and 13.

The columns 11 are arranged at the corners of the building, and the beam members 20a to 20e are joined to the two orthogonal surfaces. The columns 12 are arranged on the sides of the building other than the corners, and the beam members 20a to 20e are joined to the three surfaces. The pillar 13 is arranged in the center of the building, and the beam members 20a to 20c are joined to the four surfaces.

Each of the columns 11, 12, and 13 is configured by stacking column members 11a, 11b, 12a, 12b, 13a, 13b, 14a, 14b, 14c, 14d, and 14e made of rectangular parallelepiped precast concrete (PCa). To.

Each layer constituting the column-beam joint structure 10 is configured by combining the first structure 10a and the columnar structure 10b. The row structure 10b is composed of column members 14c, 14d, 14e and beam members 20d, 20e, and the beam members and joints are arranged in one row in the terminal row of one layer. The column members 11a, 12a, 13a, 14a, and 14b are column members that form a layer immediately below the layer of the first structure 10a and the row structure 10b.

The first structure 10a is a portion constructed before the construction of the row structure 10b. The first structure 10a includes a column member 11b, 12b, 13b, a beam member 20a, 20b arranged between the column members 11b, 12b, 13b, and a beam member 20c on which one of the joint surfaces is exposed. .. The beam member 20c is arranged between the column members 12b and 13b and the column members 14c to 14e of the row structure 10b.

On the other hand, the row-shaped structure 10b includes column members 14c and 14e constituting the columns 11 at both corners, column members 14d forming the columns 12 between the columns 11, and beam members 20d and 20e arranged between them. To be equipped with. The column members 14a and 14b are arranged at the corners and side portions in the hierarchy directly below the row structure 10b.

(Structure of pillar members 11a to 14e)
In the present embodiment, a joint portion is integrally formed at the lower end portion of each of the column members 11a to 14e. Further, on the upper surface of each of the pillar members 11a to 14e, the head of a level adjusting bolt (not shown) is provided so as to project in the vicinity of each corner. The level adjusting bolt adjusts the inclination of the pillar member on the upper floor, and a gap is created between the pillar member on the upper floor and the pillar member on the lower floor.

The pillar members 11a and 11b arranged at the corners of the building have the same structure. Here, the structure of the column member 11b constituting the first structure 10a will be described.
As shown in FIG. 2A, a plurality of mechanical joints 15 are embedded extending in the vertical direction (axial direction) at the upper end of the column member 11b. These mechanical joints 15 are connected to the column main bars built in the column members 11b, and are joined to the reinforcing bars of the column members arranged above the column members 11b. The column main bar 16 of the column member 11b protrudes from the lower surface of the column member 11b and is joined to the mechanical joint 15 of the column member 11a arranged below.

Further, a joint portion J1 is formed at the lower end portion of the column member 11b. A plurality of mechanical joints 17 are embedded in two adjacent side surface portions in the joint portion J1. These mechanical joints 17 are arranged at different heights so as not to intersect with each other on two surfaces corresponding to the extending direction of the beams to be joined.

Further, the column members 12a and 12b constituting the column 12 on the side of the building have the same structure, and only the structure of the column member 11b and the joint portion is different. Here, the structure of the column member 12b will be described.
As shown in FIG. 2B, a plurality of mechanical joints 17 extending in the horizontal direction and a plurality of through holes 18 are formed in the joint portion J2 at the lower end of the column member 12b. The mechanical joint 17 is provided on one side surface side. The through hole 18 extends in a direction orthogonal to the mechanical joint 17 and opens on both side surfaces. The mechanical joint 17 and the through hole 18 are arranged at different heights so as not to intersect with each other. Further, the through hole 18 is arranged at a height consistent with the mechanical joint 17 of the beam members 20a to 20e to which the tip of the beam main bar penetrating is fixed.

Further, the pillar members 13a and 13b arranged in the center of the building have the same structure, respectively. The pillar members 13a and 13b have different structures at the joints from the pillar members 11b and 12b. At the joints of the column members 13a and 13b, two orthogonal through holes 18 extending in the horizontal direction are formed at different heights so as not to intersect with each other.

Further, the column members 14c and 14e arranged at the corners of the row structure 10b and the column members 14a below the column members 14a have the same structure. Here, the structure of the column member 14c will be described.
The column member 14c is formed with a through hole (not shown) extending in the vertical direction.
As shown in FIG. 2C, a plurality of mechanical joints 15 are embedded in the upper end portion (of the through hole) of the column member 14c. Column main bars are inserted into the through holes and the mechanical joint 15. Further, unlike the pillar member 11b, hook bolts 19 as a plurality (four) engaging portions are provided on the upper surface of the pillar member 14c so as to project upward.

Further, in the lower part of the column member 14c, a joint portion J1 in which a plurality of mechanical joints 17 are embedded is formed as in the column member 11b. Further, unlike the column member 11b, the column main bar does not protrude from the lower surface of the column member 14c.

Further, in the column member 14d of the columnar structure 10b, a through hole extending in the vertical direction is formed as in the column member 14c, and a plurality of mechanical joints 15 are embedded in the upper end of the through hole. A plurality of hook bolts 19 are provided on the upper surface. Further, the joint portion provided below the pillar member 14d has the same configuration as the joint portion J2 of the pillar member 12b, and a plurality of mechanical joints 17 are embedded to form a through hole 18. .. As with the column member 14b, the column main bar does not protrude from the lower surface of the column member 14d.

(Structure of beam members 20a to 20e)
Next, the configurations of the beam members 20a to 20e will be described. The beam members 20a to 20e of this embodiment are made of PCa.

As shown in FIGS. 3A and 3B, the beam members 20a and 20c and the beam members 20b, 20d and 20e differ only in the length of the protruding beam main bar, and the others have the same structure. Therefore, the configurations of the beam members 20a and 20b will be described in detail, and the description of the configurations of the other beam members 20b to 20e will be omitted.

A plurality of beam main bars (not shown) are built in the beam member 20a (20b). Further, a plurality of mechanical joints 21 are embedded in one side portion (right portion in the drawing) of the beam member 20a (20b). Further, a plurality of beam main bars 22 (23) embedded in the beam member 20a (20b) project from the other side portion (left side portion) of the beam member 20a (20b). The beam main bars 22 (23) are arranged according to the positions (heights) of the mechanical joints 17 of the column members 11a to 14e to be joined.

As shown in FIG. 3A, the beam main bar 22 of the beam member 20a has a length corresponding to the mechanical joint 17 embedded in the column members 11b, 12b, 14b to 14d.
Further, as shown in FIG. 3B, the beam main bar 23 of the beam member 20b has a length corresponding to the through holes 18 of the column members 12b, 13b, 14c and the mechanical joint 21 of the beam members 20a, 20d. ..

<Column-beam joining method>
Next, a beam-column joining method will be described with reference to FIGS. 4 to 8. In this case, first, the first structure 10a is joined and formed.

A method of forming the first structure 10a will be described with reference to FIGS. 4 and 5.
FIG. 4 is a side view of the main part, and FIG. 5 is a plan view of the layer to be built. Therefore, in FIG. 5, the lower column members 11a, 12a, 13a, 14a, 14b are not displayed, and only the column members 11b, 12b, 13b, 14c to 14e and the beam members 20a to 20e are shown.

First, as shown in FIG. 4A, the column member 11b is joined onto the column member 11a. Specifically, the column member 11b is lowered, the column main bar 16 protruding downward is inserted into the mechanical joint 15 of the column member 11a, and grout is injected.

Next, as shown in FIGS. 4A and 5A, the beam member 20a is joined to the column member 11b. Specifically, the tip of the beam main bar 22 of the beam member 20a is inserted into the mechanical joint 17 extending in the horizontal direction of the column member 11b, and the beam member 20a is slid toward the column member 11b. Then, after the beam member 20a is brought into contact with the column member 11b, the glute is injected into the mechanical joint 17 of the column member 11b to fix the beam main bar 22 of the beam member 20a to the mechanical joint 17 of the column member 11b. ..

Next, as shown in FIGS. 4 (b) and 5 (b), the column member 12b is joined onto the column member 12a. Specifically, similarly to the joining of the column members 11a and 11b, the column member 12b is lowered and the column main bar 16 protruding downward is inserted into the mechanical joint 15 of the lower column member 12a to grout. inject. In this case, the column member 12b is brought into contact with the beam member 20a.
Here, as shown in FIG. 4C, the through hole 18 of the joint portion J2 of the column member 12b is aligned with the mechanical joint 21 of the beam member 20a that has been brought into contact with it.

Then, as shown in FIGS. 4 (c) and 5 (c), the beam member 20b is joined to the column member 12b. Specifically, the beam member 20b is directed toward the column member 12b in the horizontal direction so that the beam main bar 23 of the beam member 20b is inserted into the through hole 18 of the column member 12b and the mechanical joint 21 of the beam member 20a. Slide it. Then, after the beam member 20b is brought into contact with the column member 12b, the ground is injected into the through hole 18 of the column member 12b and the mechanical joint 21 of the beam member 20a to mechanically form the beam main bar 23 of the beam member 20b. It is fixed to the joint 21 and the through hole 18.

After that, as shown in FIG. 5D, the connecting reinforcing bar 25 is inserted into the mechanical joint 21 of the beam member 20b, and the end portion of the connecting reinforcing bar 25 is projected from the beam member 20b. Then, the mechanical joint 17 of the column member 11b is inserted into the connecting reinforcing bar 25.

Then, as shown in the order of FIGS. 5 (e) and 5 (f), the first step of joining the pillar members 12b and 13b on the above-mentioned pillar members 12a and 13a and the pillar members 12b and 13b. The second step of sliding and joining the beam members 20a to 20c to the joint portion is alternately repeated. In this way, the pillar members made of PCa and the beam members made of PCa are alternately incorporated in the order of the pillar member made of PCa → the beam member made of PCa → the pillar member made of PCa → the beam member made of PCa → ..., and the beam member 20c The first structure 10a is formed so as to expose the joint surface of the above.

Then, as shown in FIG. 5 (g), one end of the connecting reinforcing bar 26 is inserted into and fixed to the mechanical joint 21 of the beam member 20c of the first structure 10a. Further, the other end of the connecting reinforcing bar 26 is projected from the joint surface of the beam member 20c in the direction of the row structure 10b.

(Method of forming a row structure)
Next, a method of forming the row structure 10b will be described with reference to FIG.
After the first structure 10a is completed, a plurality of sliding members 41 are arranged on the column members 14a and 14b. The thickness of the sliding member 41 is thicker than the height of the head of the level adjusting bolt protruding above the pillar member 14a. Then, when the pillar member is placed, the level adjusting bolt is rotated to make the height of the level adjusting bolt substantially the same as the height of the sliding member 41. The sliding member 41 is configured by arranging a raising member and a plate member made of Teflon (registered trademark) above and below the raising member.

Then, as shown in FIG. 6A, the pillar member 14c is placed on the pillar member 14a with a shift. Specifically, the pillar member 14c is placed on the level adjusting bolt and the sliding member 41 of the pillar member 14a. In this case, the column member 14a is arranged at a position where it does not come into contact with the connecting reinforcing bar 26 protruding from the beam member 20c of the first structure 10a.

Next, the beam member 20d is joined to the column member 14c. Specifically, the beam main bar 22 of the beam member 20d is inserted into the mechanical joint 17 extending in the horizontal direction of the column member 14c, and the beam member 20d is slid in the second horizontal direction toward the column member 14c. Then, grout is injected into the mechanical joint 17 to fix the beam member 20d to the column member 14c.

Next, as shown in FIG. 6B, the pillar member 14d is placed on the pillar member 14b. In this case, the column member 14d is arranged at a position where it does not come into contact with the connecting reinforcing bar 26 protruding from the beam member 20c of the first structure 10a. Further, the through hole 18 of the joint portion of the column member 14d is aligned with the mechanical joint 21 of the beam member 20d.

Next, the beam member 20e is joined to the column member 14d. Specifically, the beam member 20e is slid in the second horizontal direction toward the column member 14d. In this case, the beam main bar 23 of the beam member 20e is inserted into the through hole 18 of the column member 14d and the mechanical joint 21 of the beam member 20d. Then, grout is injected into the mechanical joint 21 and the through hole 18 to fix the beam main bar 23 to the mechanical joint 21 and the through hole 18.
Next, the connecting reinforcing bar is inserted into the mechanical joint 21 of the beam member 20e, and the connecting reinforcing bar is projected from the beam member 20e.

Then, the pillar member 14e shown in FIG. 6C is slid toward the beam member 20e in the second horizontal direction. In this case, the mechanical joint 17 of the column member 14e is inserted into the connecting reinforcing bar protruding from the beam member 20e. Then, by injecting grout, the column member 14e is joined to the beam member 20e.

(Method of joining the first structure and the row structure)
Next, a method of sliding the columnar structure 10b placed on the column members 14a and 14b in the direction of the first structure 10a and joining them will be described with reference to FIGS. 7 and 8.

As shown in FIGS. 7A and 7B, the formed row structure 10b is placed on the column members 14a and 14b in a staggered state. In this case, the column members 14c to 14e of the row structure 10b are arranged so as not to engage with the connecting reinforcing bars 26 protruding from the beam member 20c of the first structure 10a.

Then, in order to slide the row structure 10b, a plurality of pressing jigs 30 as pressing members are installed at the joints between the column members 14c to 14e and the column members 14a and 14b. Since the method of installing the pressing jig 30 at these joints is the same, the space between the pillar member 14e and the pillar member 14a will be described in detail.

(Structure of pressing jig 30)
Here, the configuration of the pressing jig 30 used for sliding the row structure 10b will be described with reference to FIGS. 8A and 8B.

FIG. 8A shows a gap between the lower floor pillar member 14a and the upper floor pillar member 14e in FIG. 7. Further, FIG. 8B shows a plan view of the portion shown in FIG. 8A in a state where the upper column member 14e and the beam member 20e are removed.

As the pressing jig 30, for example, the trade name "Pitakai Mini (single)" manufactured by R-I Co., Ltd. can be used. The pressing jig 30 includes a hook plate 31, a nut member 32, a bolt member 33, and a pressing plate 34 as hooking members. The hook plate 31 is a plate member in which a plurality of recesses 31a are continuously formed. The recess 31a hooks the hook bolt 19 of the pillar member 14a when sliding.

The nut member 32 is integrally fixed on the end of the hook plate 31. The screw shaft of the bolt member 33 is screwed into the female screw at the center of the nut member 32. A pressing plate 34 is provided at the tip of the bolt member 33.

(Installation of pressing jig 30)
In the present embodiment, two hook plates 31 of the pressing jig 30 having the above-described configuration are inserted into the gap between the pillar member 14a and the pillar member 14e. Then, the recess 31a of each hook plate 31 is hooked on the hook bolt 19 of the pillar member 14a. In this case, the recess 31a at a position corresponding to the distance between the end surface of the pillar member 14e and the hook bolt 19 of the pillar member 14a is used. Next, the nut member 32 screwed with the bolt member 33 is fixed to the hook plate 31 so that the pressing plate 34 is brought into contact with the pillar member 14e. In this case, the sliding member 41 is already arranged between the column members 14a and 14e.

(Movement of row structure 10b)
Then, the columnar structure 10b is moved by using the pressing jig 30 described above.
First, the screw shaft of the bolt member 33 is rotated to advance the bolt member 33 with respect to the nut member 32. As a result, the pressing plate 34 pushes the side surface of the pillar member 14e to move the pillar member 14e in the horizontal direction (first horizontal direction). In this case, the column member 14e is moved while inserting the connecting reinforcing bar 26 of the beam member 20c into the mechanical joint 17 of the column member 14e facing the first structure 10a. When the distance for sliding the pillar member 14e is longer than the length of the bolt shaft of the bolt member 33, the position of the recess 31a of the hook plate 31 that engages with the hook bolt 19 is changed to change the position of the recess 31a of the pillar member. Repeatedly pushing 14e in the horizontal direction.

In the present embodiment, the bolt members 33 of the pressing jigs 30 provided on the pillar members 14c to 14e are rotated at substantially the same timing and at substantially the same speed. As a result, each pressing plate 34 moves each of the pillar members 14c to 14e at substantially the same speed.

Finally, the column members 14c to 14e of the row structure 10b are moved to positions consistent with the lower column members 14a and 14b. When the positions of the column members 14a and 14b and the positions of the column members 14c to 14e are aligned, grout is injected into the mechanical joint 17 of the column members 14c to 14e into which the connecting reinforcing bars 26 are inserted.
Further, when the positions of the column members 14a and 14b and the positions of the column members 14c to 14e are aligned, the through holes of the column members 14c to 14e and the mechanical joint 15 of the lower column members 14a and 14b are joined. .. Therefore, the column main bar is inserted downward from the upper surface of the column members 14c to 14e. This column main bar passes through the mechanical joint 15 of the column members 14c to 14e, is arranged in the through hole of the column members 14c to 14e and the mechanical joint 15 of the column members 14a and 14b below the through hole, and is fixed by grout injection. Will be done. After that, grout is also injected into the gap between the column members 14a and 14b and the column members 14c to 14e.
As described above, as shown in FIG. 1, the columnar structure 10b is integrated with the first structure 10a. This process is repeated up to the top floor to construct the beam-column joint structure 10.

(Action)
The column-beam joint structure 10 is constructed with the first structure 10a leaving the terminal row, and the row-shaped structure 10b constituting the terminal row is slid to be integrated with the first structure 10a. As a result, the beam-column joint structure 10 can be constructed without placing concrete at the site.

According to this embodiment, the following effects can be obtained.
(1) In the present embodiment, the column-beam joint structure 10 is integrated with the first structure 10a by sliding the columnar structure 10b. As a result, the beam-column joint structure 10 does not require concrete placement at the site, and the beam-column joint structure 10 can be efficiently constructed.

(2) In the present embodiment, the column member 14c is staggered and arranged on the column member 14a, and the beam member 20d is joined to the column member 14c. Further, the column member 14d was staggered and arranged on the column member 14b, the beam member 20e was joined to the beam member 20d and the column member 14d, and the column member 14e was joined to the beam member 20e. Thereby, the row structure 10b can be constructed by the same procedure as that of the first structure 10a.

(3) In the present embodiment, hook bolts 19 are provided on the upper surfaces of the column members 14a and 14b on which the column members 14c to 14e of the row structure 10b are placed. Using the pressing jig 30 of the hook plate 31 that engages with the hook bolt 19, the pillar members 14c to 14e are slid toward the first structure 10a. This makes it possible to slide the row structure 10b using a simple member.

(4) In the present embodiment, the sliding member 41 is arranged in the gap between the column members 14c to 14e of the row structure 10b and the column members 14a and 14b. As a result, the column members 14c to 14e can be smoothly moved.

(5) In the present embodiment, the column members 14c to 14e of the row structure 10b are slid at substantially the same speed. Therefore, the connecting reinforcing bars 26 protruding from the first structure 10a can be smoothly inserted into the mechanical joints 17 of the column members 14c to 14e.

(6) In the present embodiment, a joint portion is provided at the lower end portion of the column members 14c to 14e, and the beam members 20d and 20e are arranged below the row structure 10b. As a result, the center of gravity of the row structure 10b is located below, so that the row structure 10b can be slid stably.

This embodiment can be modified and implemented as follows. The present embodiment and the following modified examples can be implemented in combination with each other within a technically consistent range.
In the above embodiment, the columnar structure 10b is composed of column members 14c to 14e and beam members 20d and 20e including a row of joints arranged in a straight line at the end in the beam-column joint structure 10. .. The row structure 10b is not limited to one row arranged in a straight line. For example, it may be a one-row portion that is arranged so as to face the connecting reinforcing bar 26 protruding from the joint surface of the first structure 10a and is combined at the end. For example, even a structure having a curved shape may be used. Good.

The beam-column joint structure 60 shown in FIG. 9A is configured by combining the first structure 60a with the columnar structure 60b. The row structure 60b has curved beam members 61 and 62. Further, the first structure 60a has a structure in which the central beam member 20c of the above-mentioned first structure 10a is long depending on the position of the column member 14d. Then, the row structure 60b slides in the first horizontal direction toward the first structure 60a, and with the first structure 60a via the connecting reinforcing bar 26 protruding from the beam member 20c of the first structure 60a. Be integrated.

Further, as long as the row structure faces the reinforcing bar that engages with the joint portion of the first structure, the column members including the joint portion may be arranged diagonally.
For example, the columnar structure 65b of the column-beam joint structure 65 shown in FIG. 9B includes column members 64a, 64b, 64c arranged in an oblique row. In this case, the beam member 20c of the first structure 65a excluding the row structure 65b has a length corresponding to the position of the column members 64a to 64c of the row structure 65b. Also in this case, the column-beam joint structure 65 is formed by sliding the columnar structure 65b toward the first structure 65a and joining it to the first structure 65a.

Further, the column-beam joint structure may have a configuration including a plurality of row-like structures depending on the shape. In this case, the row-shaped structure is a structure arranged at the end of a planarly protruding portion in one layer of the building, and the reinforcing bars on the joint surface of the beam member to be joined to the first structure extend. It suffices if it is arranged at a position where it slides in the direction.

For example, the beam-column joint structure 70 shown in FIG. 9C includes a plurality of columnar structures 70b and 70c, and a first structure 70a before constructing them. Also in this case, the columnar structures 70b and 70c are slid in the extending direction of the connecting reinforcing bars 26 of the beam member 20c to be joined, and integrated with the first structure 70a via the connecting reinforcing bars 26. In addition, only one of the row structures 70b and 70c may be formed by the conventional method.

-In the above embodiment, the row structure 10b is formed on the column members 14a and 14b after the formation of the first structure 10a. The formation of the row structure 10b is not limited to the case where it is performed on the column members 14a and 14b. For example, the row structure 10b assembled on the ground may be lifted by a crane, and the pillar members 14c to 14e of the row structure 10b may be placed on the pillar members 14a and 14b and then slid.

-In the above embodiment, the row structure 10b placed on the column members 14a, 14b is slid toward the first structure 10a by pushing the row structure 10b from the outside of the building. .. The method of sliding the row structure 10b is not limited to this. For example, the column members 14a to 14e may be pulled from the first structure 10a side.

In this case, as shown in FIGS. 10A and 10B, the hook bolts 19 provided on the upper surfaces of the column members 14a to 14e are provided on the lower surface. Then, the hook plate 31 of the pressing jig 30 is hooked on the hook bolts 19 of the pillar members 14c to 14e. Further, a nut member 32, a bolt member 33, and a pressing plate 34 are arranged on the lower surface of the hook plate 31, and the pressing plate 34 is brought into contact with the pillar members 14a and 14b. As a result, when the bolt member 33 is rotated, the hook plate 31 is pulled by the reaction force, and the pillar members 14c to 14e slide.
Further, instead of using the pressing jig 30, a crane or the like may be used to slide the row structure 10b.

-In the above embodiment, a joint is provided at the lower end of the column members 11a to 14e. The positions of the joints of the column members 11a to 14e are not limited to this. For example, as shown in FIG. 11, a joint portion may be provided on the upper portion of the column members 74a and 74e, and the beam member 75 may be attached thereto. In this case, a plurality of separated engaging portions are formed so as to project on the upper surface of the joint portion or the lower surface of the column member. Then, the sliding member 41 is arranged on the upper surface of the joint portion and the lower surface of the pillar member, and the hook plate 31 of the pressing jig 30 is hooked on the engaging portion to slide the row structure. That is, an engaging portion is provided on the lower surface of the member including the joint portion of the terminal row or the upper surface of the lower layer member on which the member including the joint portion of the terminal row is placed, and the sliding member is arranged between them. To do.
Further, it is not necessary to provide the joint portion on the column member. For example, the column member and the joint may be made of different precast concrete. Further, on the top floor of the building, precast concrete having only a joint portion where the pillar portion is not above may be used. In these cases, the row structure is composed of a joint portion and a beam member.

In the beam members 20a to 20e of the above embodiment, the mechanical joint 21 is embedded in one side end portion, and the beam main bars 22 and 23 are projected from the other side end portion. The arrangement of the mechanical joints 21 in the beam members 20a to 20e is not limited to this. For example, it may be a beam member in which mechanical joints are embedded at both ends. In this case, the connecting reinforcing bars are inserted into the mechanical joints of the beam members and the column members that have already been installed, and the connecting reinforcing bars are projected from the column members toward the beam members to be joined.

Further, the beam members 20a to 20e of the above-described embodiment are made of precast concrete having reinforcing bars built in the concrete. These beam members may be made of half-precast concrete with exposed upper reinforcing bars.

In the column members 11a to 13b of the above embodiment, a mechanical joint 15 is embedded in the upper end portion, and the column main bar 16 is projected downward. The configuration of the column members 11a to 13b is not limited to this. For example, the column main bar may be projected upward and a mechanical joint may be embedded in the lower end portion. Further, the column member may have a mechanical joint embedded in the upper end portion and the lower end portion without projecting the column reinforcing bar. In this case, before joining the column members to be arranged above, a separate connecting reinforcing bar is inserted into the mechanical joint, and the connecting reinforcing bar is projected upward.
Further, in the column members 14c to 14e constituting the row structure 10b, a mechanical joint 15 is embedded in the upper end portion, and a through hole extending in the vertical direction communicating with the mechanical joint 15 is formed. The configuration of the column members 14a to 14e is not limited to this. For example, the portion for inserting the column main bar later into the column members 14a to 14e may be formed of a sheath tube instead of a through hole. In this case, a mechanical joint may be arranged at the uppermost portion of the column members 14a to 14e, and a sheath pipe may be arranged directly below the mechanical joint to form a through hole in the column members 14a to 14e.
Further, depending on the shape of the building, the position of the portion to be the sliding row structure 10b may be changed on each floor.

J1, J2 ... Joints, 10, 60, 65, 70 ... Column-beam joint structure, 10a, 60a, 65a, 70a ... First structure, 10b, 60b, 65b, 70b, 70c ... Row structure, 11 , 12, 13 ... Pillars, 11a, 11b, 12a, 12b, 13a, 13b, 14a, 14b, 14c, 14d, 14e, 64a, 64b, 64c, 64b, 74a, 74e ... Pillar members, 15, 17, 21 ... Mechanical joint, 16 ... Column main bar, 18 ... Through hole, 19 ... Hook bolt as engaging part, 20a, 20b, 20c, 20d, 20e, 61, 62, 75 ... Beam member, 22, 23 ... Beam main bar , 25, 26 ... Connecting rebar, 30 ... Pressing jig, 31 ... Hanging plate, 31a ... Recessed, 32 ... Nut member, 33 ... Bolt member, 34 ... Pressing plate, 41 ... Sliding member.

Claims (4)

It is a column-beam joining method in a column-beam frame composed of a column member made of precast concrete (PCa) and a beam member made of PCa joined to a joint.
A column-beam frame composed of a column member and a beam member is provided, and a first structure before construction of the terminal row is formed in a state where the joint surface facing the terminal row is exposed.
A row structure formed by joining beam members between the joints of the end row is placed on a column member on the lower floor of the row structure, and is in the same layer as the row structure. A beam-column joining method for a building, which comprises sliding in a first horizontal direction toward a beam member having the joint surface and joining to the first structure. A plurality of separated engaging portions project from the lower surface of the member including the joint portion of the terminal row or the upper surface of the lower layer member on which the member including the joint portion of the terminal row is placed. Formed,
The column beam of a building according to claim 1, wherein the columnar structure is slid in the first horizontal direction by a pressing member that can move relative to a hooking member hooked on the engaging portion. Joining method. The feature is that the sliding member is arranged between the lower surface of the member including the joint portion of the terminal row and the upper surface of the lower layer member on which the member including the joint portion of the terminal row is placed. The method for joining columns and beams of a building according to claim 2. It is a column-beam joint structure composed of a column member made of precast concrete (PCa) and a beam member made of PCa joined to the joint.
A column-beam frame composed of a column member and a beam member is provided, and the first structure before construction of the terminal row is formed with the joint surface facing the terminal row exposed.
It is composed of a row structure of the terminal row, which is formed by joining beam members between the joints of the terminal row.
The row-shaped structure is joined to the first structure via a reinforcing bar protruding from the joint surface of the first structure.
A beam-column joint structure of a building characterized by having no concrete-cast part at the site.

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