JP2008208643A - Structure and method for joining existing skeleton and new skeleton together - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connection method for a new skeleton, which makes constructibility proper, and which enables a shear force to be surely transferred between an earthquake-resisting wall and an existing skeleton. <P>SOLUTION: This joining structure 20 for joining the earthquake-resisting wall 11 to the existing skeletons 1, 2 and 3 comprises: steel plates 23A and 23B which are stuck on the surfaces of the existing skeletons 1, 2 and 3 with an adhesive 24; anchors 26A and 26B which are protrusively provided on the surfaces of the steel plates 23A and 23B, and embedded in the earthquake-resisting wall 11; and an angle bar 21 which is mounted on a surface of a member in such a manner as to be provided in a joint between the existing skeletons 1, 2 and 3 and the earthquake-resisting wall 11 across both of them. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a joining structure and method for an existing housing and a new housing, and for example, relates to a joining structure and a method for an existing housing and a new housing used when a wall is added to join an existing housing of a building.

  2. Description of the Related Art Conventionally, as a method for seismic reinforcement of a frame of an existing building, a method of newly installing a seismic wall made of reinforced concrete so as to be joined to the existing frame has been used. In this method, generally, an anchor is placed in an existing frame and a seismic wall is constructed so that the anchor is embedded, thereby integrally joining the frame and the seismic wall of the existing building. However, when performing seismic reinforcement while using an existing building, noise and vibration generated during anchor placement become a problem. Therefore, in recent years, a steel plate with anchor bars attached is attached to the existing building's frame with an adhesive, and a seismic wall is constructed so that the anchor bar is buried, and the existing building's frame and the seismic wall are built together. Method is used.

However, in the method using the adhesive as described above, there is a fear that the bonding area of the joint portion between the existing frame and the earthquake-resistant wall is insufficient and the shearing force is not sufficiently transmitted. Therefore, for example, Patent Document 1 discloses that a seismic wall is constructed so that a grooved steel having a width larger than the wall thickness of the seismic wall is bonded to the existing frame and widened to the width of the channel steel in the vicinity of the existing frame. How to do is described.
Japanese Patent Laid-Open No. 2001-27048

  However, when the width of the steel sheet is increased in this way, the weight of the steel sheet increases, making it difficult to transport, and thus there is a problem that workability is deteriorated. In addition, there is a problem in that it takes time and effort when installing the formwork for placing the concrete constituting the earthquake-resistant wall because the shape of the formwork of the widened portion becomes complicated.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a method for joining a new case that can reliably transfer shearing force between the new case and the existing case, and has good workability. That is.

The joint structure of the new housing of the present invention is a structure in which the new housing is joined to the existing housing, and is a plate-like member affixed to the surface of the existing housing with an adhesive and protruded from the surface of the plate-like member. And a joining bar embedded in the new housing, and a reinforcing member attached to the joint of the existing housing and the new housing so as to extend over both.
The plate-like member includes a flat plate-like member and a groove-shaped member.

In the joint structure of the new frame, the new frame may be an additional wall, and may be bonded to at least one of a floor, a pillar, or a beam of the existing frame, and the additional wall is a seismic wall. May be.
The extension wall may be a concrete block or an FRP block.
Further, in the joint structure of the new frame, the new frame is made of a reinforced concrete member made in the field, and a nut is embedded in the reinforced concrete member at a position where the reinforcing member is attached, and the reinforcing member is the nut. It may be attached to the new housing by being tightened with a bolt.
Moreover, the said reinforcement member may be attached to the member surface of the said existing housing and a new housing with the adhesive agent.

The new housing is joined so that the surface thereof is substantially perpendicular to the surface of the existing housing, the reinforcing member is an angle member, and the corner of the joint between the new housing and the existing housing It may be attached along.
Further, the joining method of the new housing of the present invention is a method of joining the new housing to the existing housing, and a plate-like member is pasted to the surface of the existing housing with an adhesive, and a joining bar is attached to the surface of the plate-like member. The new housing is constructed so that the joining bars are embedded therein, and a reinforcing member is attached to the surface of the member so as to span the joint between the existing housing and the new housing.

  According to the present invention, since the steel plate is provided so as to extend over the joint portion between the existing housing and the new housing, a larger shearing force can be transmitted between the existing housing and the new housing. In addition, since it is not necessary to provide a widening part in the new housing, the shape of the formwork does not become complicated, and it is not necessary to widen the width of the steel sheet, so the weight of the steel sheet can be suppressed and workability can be improved. Can do.

Hereinafter, an embodiment of a joining structure of an existing housing and a new housing of the present invention will be described with reference to the drawings. In the following description, an example will be described in which a seismic reinforcing wall is installed in an existing column beam frame and the seismic wall and column beam frame are joined.
FIG. 1 is a view showing a column beam frame 10 in which a seismic wall 11 is bonded by a bonding structure 20 of the present embodiment. As shown in the figure, the joint structure 20 of the present embodiment joins a column beam structure 10 that is an existing frame and a concrete block earthquake resistant wall 11 constructed in a space surrounded by the column beam structure 10. To do. The column beam frame 10 is seismically reinforced by joining the seismic walls 11. The seismic wall 11 is partitioned into a plurality of lengths and widths, and the joints between the concrete blocks 12 are located on the partition line, and the vertical bars and the horizontal bars are arranged.

  2A is a horizontal sectional view showing a joint structure 20A between the pillar 2 and the earthquake-resistant wall 11, and FIG. 2B is a vertical sectional view showing the joint structure 20B between the floor 3 or the beam 1 and the earthquake-resistant wall 11. It is. As shown in FIG. 2A, a steel plate 23A to which a long nut 25 is welded is attached to the surface of the column 2 with an adhesive 24, and a horizontal anchor 26A is connected to the long nut 25. The seismic wall 11 is constructed such that the transverse anchor 26A is embedded therein. In addition, an angle member 21 made of steel, FRP, or aluminum is attached to the corner between the column 2 and the earthquake resistant wall 11 with an adhesive 22.

As shown in FIG. 5B, the joint structure 20B of the floor 3 and the beam 1 and the earthquake-resistant wall 11 has substantially the same configuration as the joint structure 20A of the pillar 2 and the earthquake-resistant wall 11, but in this joint structure 20B, The vertical anchor 26B is directly attached to the steel plate 23B by welding.
In the present embodiment, the angle member 21 is provided over the entire corner of the floor 3, the beam 1 and the column 2, and the earthquake resistant wall 11, but the present invention is not limited to this and is provided as a partial configuration. Also good.

  According to such a configuration, the earthquake resistant wall 11 is bonded to the existing beam 1, column 2, and floor 3 via the steel plates 23 </ b> A and 23 </ b> B and the angle member 21. For this reason, the adhesion area of the existing floor 3, the pillar 2, the beam 1, and the earthquake-resistant wall 11 becomes large, and a bigger shear force can be transmitted among them. This eliminates the need to provide a widened portion on the earthquake resistant wall 11 or use a wide steel plate.

Hereinafter, a method for constructing the reinforcing structure 20 of the present embodiment will be described.
First, as shown in FIG. 3, the steel plates 23 </ b> A and 23 </ b> B are attached to the inside of the beam 1, the column 2, and the floor 3 of the column beam frame 10 on which the earthquake resistant wall 11 is to be constructed by using an adhesive 24. At this time, the steel plate 23B to which the vertical anchor 26B is welded is attached to the floor 3 and the beam 1 so that the vertical anchor 26B is along the lane marking. Moreover, the steel plate 23A to which the long nut 25 is attached by welding is attached to the column 2 so that the long nut 25 follows the lane marking. As the adhesive 24 for attaching the steel plates 23A and 23B, an epoxy resin or the like can be used.

  Next, the concrete blocks 12 are stacked. 4A and 4B are diagrams showing the concrete block 12, in which FIG. 4A is a plan view, FIG. 4B is a side view, and FIG. 4C is a front view. As shown in the figure, the concrete block 12 is a rectangular block having a size surrounded by the vertical and horizontal dividing lines, and the horizontal and vertical lines 27A and 27A and A semicircular joint groove 12A for inserting the vertical stripe 27B is formed.

FIG. 5 is a view for explaining a method of assembling the concrete blocks 12.
First, as shown in FIG. 5A, the first concrete block 12 is placed in the corners of the floor 3 and the pillar 2. At this time, the long nut 26 does not protrude from the joint groove 12A of the concrete block 12, and the vertical anchor 26B protruding from the floor 3 protrudes to the center of the semicircle of the joint groove 12A. 12 can be installed.

Then, the concrete block 12 is arrange | positioned to the pillar 2 of the other side. At this time, since the thickness of the concrete block 12 is equal to the width of the steel plate 23B, the concrete block 12 can be accurately arranged by arranging the concrete block 12 according to the steel plate 23B.
After the first stage arrangement, as shown in FIG. 5B, the horizontal anchor 26A is screwed and fixed to the long nut 25 attached to the steel plate 23A attached to the column 2. Since this screwing operation can be performed in the space formed by the joint groove 12A on the upper side of the concrete block 12, it can be performed without difficulty.

  Thereafter, the vertical bars 27B are connected to the vertical anchors 26B by wire numbers, welding, or the like. Similarly, the horizontal bars 27A are connected to the horizontal anchors 26A, and the vertical bars 27B and the horizontal bars 27A are bound at the crossing positions with a line or the like, and then the joint concrete is filled into the joint grooves 12A of the concrete block 12. As a result, the first-stage concrete block row is completed.

  After that, as shown in FIG. 5C, masonry of the concrete blocks 12 in the second and subsequent stages is performed, but masonry can be performed in the same procedure as in the first stage. Thereafter, the earthquake resistant wall 10 can be constructed by repeating the masonry of the concrete blocks 12, the arrangement of the vertical bars 27B and the horizontal bars 27A, and the filling of joint concrete until reaching the uppermost stage.

After the earthquake resistant wall 10 is completed, as shown in FIG. 5D, an angle member 21 is attached with an adhesive 22 at the corner of the junction between the earthquake resistant wall 11 and the floor 3, the column 2, and the beam 1. As the adhesive 22, an epoxy resin or the like can be used in the same manner as the adhesive 24 used for bonding the steel plates 23A and 23B.
Through the above process, the seismic wall 11 and the column beam frame 10 are integrated, and the seismic reinforcement of the column beam frame 10 is completed.

  According to the joint structure 20 of the new frame of the present embodiment, the seismic wall 11 is attached to the column beam frame 10 via the steel plates 23A, 23B and the angle member 21, so that the wall thickness of the seismic wall 11 is increased. In addition, an adhesive force can be secured between the column beam frame 10 and the earthquake-resistant wall 11. For this reason, it is not necessary to increase the width of the steel plates 23A and 23B, and the weight of the steel plates 23A and 23B can be suppressed, so that the workability can be improved. Moreover, since it is not necessary to provide a widening part etc. in the earthquake-resistant wall 11, installation of a formwork does not become complicated and workability can be improved.

In addition, in said embodiment, although the case where the earthquake-resistant wall 11 was constructed | assembled with the concrete block 12 was demonstrated, not only this but the FRP block may be stacked and the earthquake-resistant wall 11 may be constructed.
Further, the seismic wall 11 can be made of reinforced concrete made in the field. In such a case, as shown in FIG. 6, when placing concrete, a nut 46 is embedded so as to be exposed on the surface of the member. The angle member 42 can be attached to the earthquake-resistant wall 31 by tightening the angle member 42 with a bolt 45.

In the present embodiment, the angle member 21 is attached to the joint between the earthquake resistant wall 11 and the column beam frame 10 so as to extend over both. However, for example, as shown in FIG. By constructing the two side surfaces so as to be aligned on the same plane, a plate-like steel plate 52 can be attached so as to span the joint between the earthquake-resistant wall 51 and the beam 2.
Moreover, in this embodiment, although it was set as the structure which attaches the steel plates 23A and 23B to the floor 3, the pillar 2, and the beam 1, it is good also as a structure which attaches not only this but a grooved steel etc.

  Moreover, although this embodiment demonstrated the case where the earthquake-resistant wall 11 was provided so that the space formed with the column beam frame 10 may be blocked, it is not restricted to this, and it forms with the column beam frame 10 like a sleeve wall as an earthquake-resistant wall. The present invention can also be applied to the case where a wall is added so as to block a part of the space to be formed. In short, the present invention can be applied to the case where an existing casing and a new casing made of a concrete member are joined.

It is a figure which shows the column beam frame by which the earthquake-resistant wall was joined by the joining structure of this embodiment. (A) is a horizontal sectional view showing the configuration of the junction between the column and the earthquake-resistant wall, and (B) is a vertical sectional view showing the configuration of the junction between the floor or beam and the earthquake-resistant wall. It is a figure which shows the state by which the steel plate was stuck with the adhesive toward the space enclosed by the column beam frame. It is a figure which shows a concrete block, (A) is a top view, (B) is a side view, (C) is a front view. It is a figure for demonstrating the method of assembling a concrete block. It is a figure which shows the joining structure at the time of making a seismic wall into the field reinforced concrete structure. It is a figure which shows the joining structure at the time of constructing | assembling a seismic wall so that a side surface may be located in a line with the side surface of a beam member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Beam 2 Column 3 Floor 10 Column beam frame 11 Earthquake-resistant wall 12 Concrete block 20, 20A 20B Joint structure 21, 41 Angle material 22, 42 Adhesive 23, 23A, 23B Steel plate 24 Adhesive 25 Long nut 26A Horizontal anchor 26B Vertical anchor 27A transverse bar 27B longitudinal bar 31 (steel reinforced concrete) earthquake resistant wall 43 steel plate 44 adhesive 45 bolt 46 nut 51 (steel reinforced concrete) earthquake resistant wall 52 flat steel plate

Claims (8)

It is a structure that joins a new structure to an existing structure,
A plate-like member affixed to the surface of the existing housing with an adhesive;
A joint that protrudes from the surface of the plate-like member and is embedded in the new housing;
A joining structure of an existing housing and a new housing, comprising: a reinforcing member attached to a joint portion between the existing housing and the new housing so as to extend over both.   2. The joint structure of an existing housing and a new housing according to claim 1, wherein the new housing is an additional wall and is joined to at least one of a floor, a column, or a beam of the existing housing.   The joint structure of an existing case and a new case according to claim 2, wherein the additional wall is a seismic wall.   The joint structure of an existing case and a new case according to claim 2 or 3, wherein the additional wall is formed by assembling a concrete block or an FRP block. A joint structure of the existing housing and the new housing according to any one of claims 1 to 3,
The new frame is made of a reinforced concrete member made in the field,
In the reinforced concrete member, a nut is embedded at a position where the reinforcing member is attached,
The joint structure of an existing housing and a new housing, wherein the reinforcing member is attached to the new housing by being fastened to the nut with a bolt.   The joining structure of the existing housing and the new housing according to any one of claims 1 to 5, wherein the reinforcing member is attached to a member surface of the existing housing and the new housing by an adhesive. The new housing is joined so that the surface thereof is substantially perpendicular to the surface of the existing housing,
The joint structure of an existing housing and a new housing according to claim 1, wherein the reinforcing member is an angle member, and is attached along a corner of a joint portion between the new housing and the existing housing. A method of joining a new chassis to an existing chassis,
Affixing a plate member with an adhesive to the surface of the existing housing,
Protruding a joint on the surface of the plate member,
Build the new housing so that the joint muscle is embedded inside,
A method of joining an existing housing and a new housing, wherein a reinforcing member is attached to the surface of the member so as to extend over the joint portion of the existing housing and the new housing.

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