JP4499530B2 - Reinforced concrete column beam connection method - Google Patents

Description

  The present invention relates to a reinforced concrete column beam joining method.

When joining columns and beams of a reinforced concrete building, a plurality of beams are often joined to one column. An example of a conventional column beam joint is disclosed in Japanese Patent Application Laid-Open No. 11-29979. This column beam joint has a structure in which the beam main bar is fixed inside the column main bar via a joint, and this joint is composed of four fixing brackets having fitting grooves that can be assembled in a cross beam shape. The ends of the main bars of the beam are fixed to the metal fittings, and the fixing metal fittings are fixed to each other in a cross beam shape to fix the main beam of the beam inside the column. By using such four fixing brackets, the pulling-out force of the beam main bars is made orthogonal to obtain high fixing performance.
Japanese Patent Laid-Open No. 11-29979

  However, the column beam joint disclosed in Patent Document 1 has a structure in which beam principal bars of opposite beams are fixed by a joint. For this reason, it is necessary to connect the main bars of the beam at the beam-column joint with joints, but since there are many column main bars in addition to the beam main bars at the beam-to-column joint, There was a problem that it took time to connect.

  In addition, since the beam main bars of the beams facing each other are connected to each other, it is necessary to improve the level of the beam main bars. In particular, when a precast concrete beam is used, the precast concrete beam must be manufactured with high precision in a factory, which causes an increase in cost.

  Therefore, an object of the present invention is to make it possible to easily arrange beam main bars at a column-beam joint having a large number of column main bars. Another object is to provide a reinforced concrete column beam joining method that does not require high accuracy when manufacturing a precast concrete beam.

Reinforced concrete column beam connection method according to the present invention that has solved the above problems is a column main bar in a concrete column provided with a column main bar protruding from the column main body, and a concrete made with a beam main bar protruding from the beam main body. In a reinforced concrete column beam connection method in which the beam main bars of the beam are arranged crossing each other to form a column beam connection, a reinforcing bar fixing tool is attached to the tip of the beam main bar, and the beam main bar protrudes from the beam body The length of the column is less than half of the width of the column body in the column, and after placing the column and arranging the column main reinforcement at the column beam joint, arrange the beam body on the side of the column, The beam reinforcement is arranged at the beam-column joint, and an approximately U-shaped shear reinforcement with an opening formed by removing one side of the rectangle on the surface formed by the intersection of the column reinforcement and the beam reinforcement. Facing the direction of intersection and entering from the opening side And, in the beam-column joints side of the pillar body, than the pillar main body is provided with protruding plate portion of the thin, viewed from the outside of the reinforced concrete building, to form a beam-column joint on the inner side of the plate-like portion The joint member is embedded in the plate-like part, and the straight bars joined to the joint member are projected toward the beam-column joint side, and the straight bars and the shear reinforcement bars are placed facing each other. Features.

  In the reinforced concrete column-beam joining method according to the present invention, the length of the beam main bar protruding from the beam body is less than half of the width of the column body in the column. After the column main bars are arranged, the beam main body is arranged on the side of the column and the beam main bars are arranged at the column beam joint. Although many column main bars protrude from the column beam joint, it is not necessary to join the beam main bars of the beams facing each other. Therefore, the beam main bars can be easily arranged at the column beam joint where there are a large number of column main bars, and it is not necessary to match the levels with high accuracy.

  At this time, since the fixing length is shortened, the fixing strength is reduced. However, in the bar arrangement structure at the connection portion of the column beam according to the present invention, a reinforcing bar fixing tool is provided at the tip of the beam reinforcing bar. The U-shaped shear reinforcement bars are arranged. By providing the reinforcing bar fixing tool and the shear reinforcing bar, it is possible to improve the fixing strength of the beam reinforcing bar and to prevent the beam reinforcing bar from being pulled out. Moreover, since only the reinforcing bar fixing tool is attached to the tip of the beam reinforcing bar, a large amount of reinforcing bar space can be eliminated.

  Here, the concrete column and the concrete beam are respectively a precast concrete column and a precast concrete beam, and after the precast concrete column is erected, the precast concrete beam can be joined. .

  In the beam-column joining method according to the present invention, high accuracy is not required to adjust the level. Therefore, even when the columns and beams are made of precast concrete, it is higher than the beams made of precast concrete. Accuracy can be prevented from being required.

  Thus, by forming the beam-column joint inside the plate-shaped portion, the beam-column joint can be formed without providing a formwork on the outer peripheral surface side of the building. Moreover, since the external appearance after forming the beam-column joint can be made beautiful, the subsequent construction work can be facilitated.

  Thus, by arranging the straight reinforcing bars and the shear reinforcing bars facing each other, the reinforcing bars can be arranged more easily and a large shear strength can be obtained.

  According to the reinforced concrete column beam connection method according to the present invention, the beam main bars can be easily arranged at the column beam connection portion having a large number of column main bars. Further, it is possible to prevent a high accuracy from being required when manufacturing a precast concrete beam.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view of a beam-to-column connection portion in which columns and beams are bonded by a reinforced concrete column-beam bonding method according to the present invention, and FIG. 2 is a plan sectional view thereof.

  As shown in FIG. 1, the column beam joint C according to the present embodiment is provided facing the outer periphery of a concrete building, and is a precast concrete column member (hereinafter referred to as “column member”) 1. In this embodiment, two precast concrete beam members (hereinafter referred to as “beam members”) 2 are joined together. The column member 1 is further joined to the column beam joint C on the upper side.

  The column member 1 includes a column main body 11 and a plate-like rising portion 12. The column main body 11 and the rising portion 12 are made of integrally formed precast concrete, and the rising portion 12 is formed of a plate-like portion that is thinner than the column main body, and protrudes from the upper end of the column main body 11. It is a rising part provided. The rising portion 12 is disposed at the outer wall position of the concrete building. Therefore, the column beam joint C is formed inside the rising portion 12 when viewed from the outside of the concrete building.

  On the upper surfaces of the column main body 11 and the rising portion 12, a plurality of, in the present embodiment, 16 column main bars 13 protrude. The column main reinforcing bars 13 are embedded in the column main body 11 so as to extend in the vertical direction, and the tip portions thereof protrude from the upper surfaces of the column main body 11 and the rising portion 12. A column main bar insertion hole 14 into which the column main bar 13 is inserted is formed at a position corresponding to the position where the column main bar 13 is provided on the lower surface of the column main body 11. In the column beam joint C, the column members 1 are arranged at the upper and lower positions, but the column main bars 13 in the lower column member 1 are inserted into the column main bar insertion holes 14 in the lower column member 1.

  Further, a joint member 15 is embedded in the rising portion 12 of the column member 1. The joint member 15 is configured by providing joints at both ends of a bar that is slightly shorter than the width of the column member 1. The bar portion is disposed along the width direction of the column member 1, and is entirely embedded in the rising portion 12 of the column member 1. The joints provided at both ends of the bar portion are arranged so as to protrude in the direction orthogonal to the bar portion and to the column beam joint C side.

  The beam member 2 includes a beam main body 21, and a plurality of beam main bars 22 in the present embodiment are provided on the beam main body 21 from the left and right sides of the beam main body 21. The beam main bars 22 protrude from the left and right positions of the beam main body 21, and their arrangement positions are symmetrical. For this reason, beam main bars 21 are located in the position which counters.

  A female screw part is formed at the tip of the beam main bar 22, and a fixing nut 3 that is a reinforcing bar fixing tool of the present invention is screwed into the female screw part. A fixing plate is formed on the head of the fixing nut 3. The two beam members 2 joined to the column member 1 are both arranged at the same height with respect to the column member 1, and the fixing nuts 3 are arranged at positions facing each other. In addition, the fixing length of the beam main bar 22 in the column beam joint C is set to be equal to or less than half the width of the column member 1. The width | variety of the column member 1 here says the length between the surfaces where the two beam members 2 are each joined.

  Furthermore, the column beam joint C is provided with panel hoop bars 5 and straight bars 4 which are shear reinforcement bars of the present invention. The panel hoop line 5 has a substantially U shape in which one side of the rectangle is removed and an opening is formed, and the opening side is arranged facing the rising part 12 side of the column member 1. Further, the straight muscle 4 has a male screw portion formed on one end side, and is screwed into joints provided at both ends of the joint member 15 embedded in the rising portion 12 of the column member 1 and is straight to the joint. 4 is joined. In this way, the straight line 4 protrudes from the rising portion 12 toward the column beam joint C side.

  A plurality of the panel hoop bars 5 are arranged in the present embodiment, and the four panel hoop bars 5 are arranged at substantially the same interval in the height direction. Further, the panel hoop bar 5 is arranged by entering from the opening side in the direction intersecting the plane formed by the column main bar 13 and the beam main bar 22 intersecting, that is, the direction orthogonal to the present embodiment. ing. Further, as shown in FIG. 2, it is arranged so as to surround the column main reinforcement 13 provided in the column member 1, and a plurality of straight reinforcements 4 are also arranged, and arranged in the width direction of the column member 1. A total of 8 straight bars are arranged as a set of two. In this way, the panel hoop line 5 and the straight line 4 are arranged facing each other.

  A procedure for joining a column and a beam in the beam-column joint according to the present embodiment having the above-described configuration will be described.

  First, as shown in FIG. 3, a column member 1 </ b> B is newly erected on a column beam joint C <b> 1 that is already formed by joining a column member 1 </ b> A and a beam member 2 </ b> A. When the column member 1B is erected, the column main reinforcing bars 13 protruding from the column main body 11 of the lower column member are formed on the lower surface side of the upper column member 1A from the lower column beam joint C1. It inserts in the column main muscle insertion hole 14 currently made. In this way, the upper column member 1B is positioned and the column member 1B is placed on the column beam joint C1. The column beam joint C2 is provided inside the rising portion 12 of the column member 1B.

  Next, as shown in FIG. 4, the two beam members 2B and 2B are lowered from the upper side of the column main body 11 in the upper column member 1B in a state of facing each other. These beam members 2B and 2B are the upper beam members. At this time, the beam main reinforcing bars 22 provided in the beam member 2B are arranged in such a manner that they enter between the column main reinforcing bars 13 provided in the column member 1B from above. Further, the fixing nuts 3 and 3 attached to the respective ends of the beam main bars 22 in the beam members 2B and 2B facing each other are arranged in a state of facing each other. Then, two beam members 2B are arranged facing each other on the upper surface of the column main body 11 in the column member 1A.

  At this time, in the column beam joint C2 between the column member 1B and the beam member 2B, the joint member 15 provided at the rising portion 12 in the column member 1B shown in FIG. 1 protrudes inward. After the beam member 2B is disposed, the straight bars 4 are screwed into the joint members 15, respectively.

  Then, the panel hoop bars 5 are inserted into the beam-column joint C2 from the inside of the building, and the panel hoop bars 5 are arranged so as to alternate with the straight bars 4 in the height direction. After that, it is attached to the column main bar 13 with a wire (not shown).

  As described above, in providing the shear reinforcing bar in the beam-column joint, the straight beam is screwed into the joint member 15 provided in the rising portion 12 in the beam-column joint according to the present embodiment. Just insert the hoop muscle. Therefore, although a large number of column main bars 13 protrude from the column beam joint C2, the straight bars 4 and the panel hoop bars 5 which are shear reinforcement bars can be easily arranged. Further, the length of the main beam 22 protruding from the beam main body 21 in each of the beam members 2B and 2B facing each other is set to be half or less of the width of the column main body 11. For this reason, even if the beam main bars 22 are not arranged with a level difference, the beam main bars 22 can be prevented from interfering with each other.

  Further, although the shear strength is increased by the fixing nut 3 provided at the tip of the beam main bar 22, in addition to this, the straight bar 4 and the panel hoop bar 5 are provided as the shear reinforcement bars, so that they face each other. Sufficient shear strength can be imparted without joining the beam main bars 22 in the beam member 2B. Therefore, the trouble at the time of providing the column beam joint C can be greatly reduced.

  Then, a formwork is attached to the inside of the building at the column beam joint C2, and concrete is placed. At this time, since the column beam joint C2 is provided inside the rising portion 12 of the column member 1B, there is no need to provide a formwork outside the building, so that labor can be saved. As the concrete solidifies, as shown in FIG. 5, the column beam joint C2 is completed. Thereafter, the column member 1 is further erected on the column beam joint C2 to construct a building.

  As described above, in the beam-column joining method according to the present embodiment, when the beam main bars 22 are arranged at the beam-column joint C, it is necessary to join the beam main bars 22 while the many column main bars 13 stand. Absent. For this reason, since the reinforcement of the beam main reinforcement 22 can be performed easily, it can contribute to shortening the work period and also to cost reduction.

  In addition to the column main reinforcement 13 and the beam main reinforcement 22, a straight reinforcement 4 and a panel hoop reinforcement 5 are provided as shear reinforcements in the column beam joint. For this reason, sufficient shear strength can be imparted to the column beam joint C. Furthermore, since the column beam joint C is provided inside the rising portion 12 of the column member 1, after the concrete structure is constructed, the appearance can be made beautiful, and the subsequent construction work is simplified. Can be

  The preferred embodiment of the present invention has been described above, but the present invention is not limited to the above embodiment. For example, in the above embodiment, the column member 1 is provided with the rising portion 12, but a column member without this rising portion can also be used. Thus, when it is set as the aspect which does not provide a standing part, it replaces with the straight line | wire provided in a standing part, inserts a panel hoop line | wire, and gives panel strength by facing panel hoop line | wires mutually. Can be.

  Moreover, in the said embodiment, although the two beam members 2 and 2 are joined to the column beam junction part C, it can also be set as the aspect which joins three or four beam members. Furthermore, in the above-described embodiment, the reinforcing bar fixing tool is provided at the tip of the beam main bar 22. However, as the reinforcing bar fixing tool, a fixing plate that connects the ends of the adjacent beam main bars 22 can be used. In the above embodiment, the column main reinforcement protrudes above the column main body and the column main reinforcement insertion hole is formed on the lower surface of the column main body. Instead, the column main reinforcement protrudes below the column main body. It can also be set as the aspect which forms and forms a column main reinforcement insertion hole in the upper surface of a column main body.

  Furthermore, in the said embodiment, although the column member and beam member made from precast concrete are respectively used as a column member and a beam member, it can replace with this and can manufacture a column and a beam with cast-in-place concrete. Of course, one of the columns and beams can be made of precast concrete and the other can be cast-in-place concrete.

It is a disassembled perspective view of the column beam joint part with which the column and the beam were joined by the reinforced concrete column beam connection method concerning the present invention. It is a plane sectional view of the beam-column joint part with which the beam and the beam were joined by the beam-column joining method of the reinforced concrete structure concerning the present invention. It is a perspective view in the state where the upper column member was erected in the lower column beam joint. It is a perspective view in the state where a beam member is arranged on a column member. It is a perspective view in the state where the upper column beam joint part was completed.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 (1A, 1B) ... Column member 2 (2A, 2B) ... Beam member 3 ... Fixing nut 4 ... Straight bar 5 ... Panel hoop bar 11 ... Column main body 12 ... Standing part 13 ... Column main bar 14 ... Column main bar insertion hole 15 ... Joint member 21 ... Beam main bar 21 ... Beam body 22 ... Beam main bar C (C1, C2) ... Column beam joint

Claims (2)

Column beam joint in which the column reinforcement in a concrete column provided with column main bars protruding from the column main body and the beam main bar in a concrete beam provided with beam main bars protruding from the beam main body are arranged intersecting each other. In the reinforced concrete column beam joining method in which the part is formed,
A reinforcing bar fixing tool is attached to the tip of the beam main bar, and the length of the beam main bar protruding from the beam main body is less than or equal to half the width of the column main body in the column,
After the column is erected and a bar main bar is arranged at the column beam joint, the beam main body is arranged on the side of the column, and the beam main bar is arranged at the column beam joint,
A substantially U-shaped shear reinforcement bar in which an opening is formed by removing one side of the rectangle, and the opening is directed in a direction intersecting a plane formed by the column main bar and the beam main bar crossing each other. From the side to arrange the bars ,
On the column beam joint side of the column body, a plate-like portion that is thinner than the column body is provided to protrude,
As seen from the outside of the reinforced concrete building, the column beam joint is formed inside the plate-like part,
A joint member is embedded in the plate-like portion, and a straight line joined to the joint member protrudes toward the beam-to-column joint side, and the straight line and the shear reinforcement are arranged facing each other. beam-to-column method of joining reinforced concrete, characterized in that the muscle. The concrete pillar and the concrete beam are respectively a precast concrete pillar and a precast concrete beam,
The reinforced concrete column beam joining method according to claim 1, wherein the precast concrete beam is joined after the precast concrete pillar is erected.

Images