JP2002332704A - Slit structure for non-structural wall - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an earthquake-proof slit structure comprising a vertical slit material and a horizontal slit material embedded along the periphery of a non-structural wall in which development of cracking or the like on the lower end side of the non-structural wall is prevented to improve water stopping performance. SOLUTION: The horizontal slit material 8 having a tilted surface 8a on the outdoor side is installed on concrete of a lower floor, and as a prismatic piece of auxiliary slit material 10 is applied to the tilted surface 8a, the vertical slit material 5 is placed to cover the auxiliary slit material 10 and the horizontal slit material 8. As joint rods 15 are provided between both sides of the vertical slit material 5, an outer form 16 and an inner form 17 are constructed, and concrete is placed. Since there is no cavity between a lower end surface of the vertical slit material 5 and the tilted surface 8a, concrete is not charged to fine parts, thereby causes for developing cracking are not made.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an earthquake-resistant slit structure formed at a joint between a structural frame such as a pillar or a beam in a concrete building and a non-structural wall connected thereto.

[0002]

2. Description of the Related Art In recent years, in concrete buildings such as buildings, the purpose of forming a structural slit which is a mechanically discontinuous portion with respect to interlayer displacement is formed at a boundary portion between a structural frame such as a column or a beam and a non-structural wall. A construction method using a buffer material called a slit material is becoming widespread. The slit material penetrates the wall or is buried so as to leave a predetermined wall thickness, and the building is structurally divided via the slit material. In other words, when subjected to an external force due to an earthquake, the transmission of the deformation force generated in the building to the structural frame is blocked by the slit material buried around the non-structural wall, so as to avoid the shear and brittle fracture of the building. Has become. This type of slit material for earthquake resistance includes reinforced concrete building walls (non-structural walls),
There are a vertical slit member buried near the boundary between the pillar and a horizontal slit member provided between a wall on the upper floor of the building and a beam on the lower floor. By appropriately combining these two types of slit materials and burying them around the non-structural wall, the non-structural wall is actively separated from the structural framework such as a pillar. As a conventional example of the horizontal slit material used here, JP-A-11-336229
And Japanese Unexamined Patent Application Publication No. 2001-3492 are known. Such a slit material has a shape in which the side surface on the outdoor side, that is, the side surface facing the joint portion side is inclined downward, thereby preventing infiltration of rainwater from the joint portion, and at the same time, a slit having a rectangular cross section before that. It is intended to suppress the occurrence of cracks near joints on the outer wall, which has been a problem when a material is applied.

[0003]

When the horizontal slit member formed on the inclined side surface of this type is used together with a general vertical slit member, both slit members are formed on the joint surface. It is necessary to place the vertical slit member on the upper surface of the horizontal slit member such that the lower end surface of the vertical slit member is in contact with each other at a position where the side surfaces thereof are substantially coincident with each other so as to be buried at substantially the same depth. Therefore, a triangular prism-shaped gap remains between the inclined surface of the horizontal slit member and the lower end surface of the vertical slit member. Therefore, when the concrete is cast, the concrete invades also into the small gap portion which is the intersection of both slit members. As a result, at the lower end portion of the vertical joint formed on the outer surface side of the vertical slit member, a small projection projects from the side surface of the wall into the joint. Since the concrete projections are weak in strength, even in a small earthquake, cracks are easily generated at the corresponding locations, and in some cases, the concrete projections may be peeled off from the wall surface.

The present invention has been made in view of the above-mentioned problems of the prior art, and provides a slit structure of a non-structural wall which has improved water stopping performance by making full use of the advantages of a horizontal slit material having an inclined side surface. For that purpose.

[0005]

In order to achieve the above object, according to the present invention, a vertical slit member and a side surface on the outdoor side extend in a longitudinal direction along a joint between a non-structural wall and a structural framework such as a column or a beam. In the slit structure of a non-structural wall in which a horizontal slit material having a continuous inclined surface is embedded in each part, the vertical slit material has a side surface substantially equal to or lower than the lower edge of the inclined surface of the horizontal slit material. At a position further forward than the lower slit, the lower slit is connected to the horizontal slit member in a state in which substantially no gap is formed.

According to this configuration, when the horizontal slit and the vertical slit are formed in a connected state around the non-structural wall, the vertical slit member is set to be different from the horizontal slit member having the outdoor side surface inclined. Is placed or attached so that a gap is hardly generated at the contact portion between the two, so that the poured concrete does not enter the inside of the vertical joint. Therefore, small concrete projections that lead to cracks and peeling are not formed at the lower end of the vertical joint side of the concrete wall, so that the horizontal slit material with the inclined side surface has the great feature of waterproofness etc. as it is As a result, the water stopping performance of the entire wall surface is greatly improved.

[0007] There are several methods for making the connection between the vertical slit material and the horizontal slit material substantially free of gaps. For example, when applying a vertical slit material whose end face is formed at right angles to the longitudinal direction, a triangular prism-shaped gap formed between the horizontal slit material and the inclined surface when placed on the upper surface of the horizontal slit material However, an auxiliary slit material previously formed in a similar three-dimensional shape may be supplemented. Also, the end of the vertical slit material may be a sloped end surface that can be fitted to the sloped surface of the horizontal slit material,
Either case is effective in improving the water stoppage.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In a slit structure of a non-structural wall according to the present invention, a vertical slit member provided between a column portion and a non-structural wall, and a horizontal slit member provided between a beam portion and a non-structural wall. As a material for the slit material, basically, any material can be used as long as its volume is appropriately reduced when subjected to a compressive force.
Specific examples include a foamed polymer material typified by foamed polyethylene, a calcium silicate plate, a calcium carbonate foam, and the like, but are not limited thereto. When the above-mentioned auxiliary slit material is used, as a fixing means, for example, when it is attached to the inclined side surface of the horizontal slit material with an adhesive tape or an adhesive, or when it is attached to the end face of the vertical slit material, It is convenient in terms of.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is an overall explanatory view of a slit structure in a non-structural wall according to the present invention when viewed from the indoor side. In FIG. 1, a non-structural wall (outer wall) 1 is surrounded by pillars 2 and 2 on both sides, a beam 3 and a beam 4 on a lower floor, and a vertical slit member 5 is provided between the pillars 2 and 2 and The horizontal slit members 6 are buried between the floor beams 4, respectively, so that the structure is structurally separated from the structural framework such as the columns 2 and the beams 4. FIG. 2 is a vertical cross-sectional view showing an intersection between the vertical slit member 5 and the horizontal slit member 6 in FIG. 1, that is, the vicinity of the lower corner of the non-structural wall 1. In this case, the horizontal slit member 6 includes the first slit member 7 arranged on the beam 4 side of the lower floor and the non-structural wall 1 of the upper floor.
And a second slit member 8 disposed on the lower end side of the second slit member. The vertical slit member 5 is placed on the upper surface of the second slit member 8 at a position where the side surfaces substantially coincide with each other. The horizontal joints 9a and the vertical joints 9b connected to the outer sides of the side surfaces of the slit members 5 and 6 are filled with a caulking material 12 via backup materials 11a and 11b.

Here, the first slit member 7 is made of a material having a suitable elasticity such as foamed polyethylene, and is formed in a trapezoidal cross section with one side inclined, and a through hole penetrating in the vertical direction. (Not shown) are provided along the longitudinal direction. And a support tool 2 to be described later.
0 along the longitudinal direction inside a horizontal joint 9a formed at a predetermined position in a state fixed to the holding portion 21, that is, at the upper end of the outer surface of the beam 4 of the lower floor forming a part of the non-structural wall. It is arranged. The second slit member 8 has one slit member main body 8b having an inclined surface 8a on the joint portion 9a side.
And a non-combustible material 8d such as rock wool is provided between the other slit material main body 8c having the same thickness (corresponding to the slit width) and having a rectangular cross section. (Not shown) so as to be sandwiched from both sides. In this case, the slit material main bodies 8b and 8c are both made of foamed polyethylene. And, the inclined side end including the inclined surface 8 a is juxtaposed with the upper surface of the first slit member 7. Note that the angle of the inclined surface 8a is optimally 45 degrees, but is not necessarily limited to this angle, and can be appropriately changed according to use conditions and the like. The inclined surface 8a does not necessarily have to be linear, but may be an inclined curved surface that gradually decreases outward in a curved manner. In any case, there is not much difference in the effect.

Here, as shown in an enlarged manner in FIG. 3, a support 20 for fixing the first slit member 7 at a predetermined position includes a holding portion 21 having an L-shaped cross section, and the holding portion 21. And a connecting portion 22 having a substantially U-shaped cross section and provided on the back side of the rising wall portion. The connecting portion 22 is used for fitting with the joint rod 13 at the time of installation. Further, in this embodiment, an anchor portion 23 is integrally formed diagonally below the horizontal portion of the holding portion 21 and a hole (not shown) is provided in the horizontal portion. In addition, this hole,
A plurality of the supports 20 are provided at predetermined intervals along the longitudinal direction. In addition, a synthetic resin such as polyvinyl chloride is preferable as the material, but other materials such as metal do not cause any problem.

Next, a procedure for constructing a non-structural wall according to the present invention will be described with reference to FIGS. First, a joint bar 13 for a horizontal joint is fixed to a predetermined position of a vertical formwork (outer formwork) 14 of the lower floor, that is, a position corresponding to the horizontal joint 9a in FIG.
Subsequently, the support 20 in a state in which the first slit member 7 is fixed to the holding portion 21 via an adhesive tape or the like is fitted with the connecting portion 22 from the back side of the joint rod 13 to form the second slit. One slit member 7 can be easily and securely fixed to the vertical formwork 14. Here, if a headless nail is further driven in from the inclined surface side of the first slit member 7, the fixing strength is further increased. After fitting only the support 20 to the joint bar 13, the first slit member 7 is
1 may be attached. Then, an appropriate inner formwork (not shown) is installed, and concrete on the lower floor is poured to the upper surface position of the first slit member 7. In this case, the through holes 7a provided in the first slit member 7 communicate with the holes of the support 20 respectively, and these function as air vent holes. As a result, when the concrete on the lower floor is poured, Air does not accumulate on the back side of the joint bar 13 and the support 20 that protrude in the horizontal direction with respect to the vertical form 14, and a dense concrete filling state is obtained.

As shown in FIG. 4, after the concrete 4 on the lower floor has hardened, the second slit member 8 is placed at a predetermined position on the surface thereof, and is adhered to the concrete surface of the lower floor via an adhesive tape, a concrete nail or the like. Fix it. Further, the auxiliary slit member 10 is fixed to the inclined surface 8a of the second slit member 8 at a position where the vertical slit member is to be placed. The auxiliary slit member 10 is made of the same material as the first slit member 7 or the second slit member 8. As shown in FIG. 8a
The cross section of the slit material main body 8b can be a substantially rectangular cross section by contacting the slit member main body 8b. In this case, an appropriate adhesive tape 10b such as butyl tape is adhered to the slope portion of the main body 10a, that is, the contact surface of the second slit member 8 with the inclined surface 8a. It can be pasted on. Subsequently, as shown in FIG. 6, the vertical slit member 5 having appropriately shaped holders 5 a and 5 b fitted on both side surfaces is substantially aligned with the corner portion of the main body 10 a of the auxiliary slit member 10. As shown. Then, as shown in FIG. 7, a joint bar 15 for a vertical joint is previously placed at a predetermined position.
The outer formwork 16 and the inner formwork 17 for the upper floor to which the above is fixed are installed, and concrete of the upper floor is poured. After the concrete has hardened, the outer formwork 1 remains with the joint bars 15 fixed.
6 and the inner mold 17 are removed. Further, in the inside of the vertical and horizontal joint portions 9a, 9b after the joint bars 13, 15 are removed, backup materials 11a, 11b are replaced with the support members 20 and the holders 5a, 5b instead of the joint bars 13, 15 respectively. When the caulking material 12 is filled into the outside of the groove,
A slit structure of the non-structural wall according to the invention is formed (see FIG. 2). Although not shown, an anchor reinforcing bar is buried between the outer wall 1 on the upper floor and the beam 4 on the lower floor so as to penetrate the second slit member 8, and concrete is adhered to the upper surface thereof. A cylindrical plastic cover with a bottom for cutting is covered. In the embodiment, the case where the lower end edge of the second slit member 8 is installed so as to be substantially flush with the outdoor side surface of the first slit member 7 has been described. It is possible to install at a position retracted from the outdoor side surface of the slit material 7 of
In this case, the columnar shape of the auxiliary slit member 10 may be changed from a right-angled triangular cross-section to a trapezoidal shape with one right-angled.

As described above, in the present invention in which the slit structure is formed around the non-structural wall 1 by using the horizontal slit member 8 and the vertical slit member 5 having the inclined surface 8a extending in the longitudinal direction on the outdoor side, both slits are provided. Since there is substantially no space in which the concrete can enter in the abutting portions of the members 5 and 8, when the concrete of the upper floor is poured, the concrete projects from the side surface of the non-structural wall 1 into the joints 9a and 9b. Concrete is reliably filled only in necessary places in the concrete forms 16 and 17 without forming a weak portion in strength. For this reason, cracks and peeling of concrete at the lower end portion of the outer wall, which have locally caused a decrease in water stoppage in the prior art, hardly occur, and the water stoppage as a whole is greatly improved.

In the above embodiment, since the support 20 and the holders 5a and 5b each have an anchor portion for pulling out, even when a headless nail is used in combination for mounting, the vertical forms 16, 17 and When the joint bar 15 is removed, it is not pulled out together. When the second slit member 8 having the non-combustible material 8d as shown in FIG. 2 or a slit member lacking in fire resistance is used, a coking material 12 made of a material having high fire resistance should be used. Is desirable. Further, when a water-stopping material such as a butyl rubber sheet is provided on the inclined surface 8a of the second slit member 8 and the bottom surface adjacent to the first slit member 7, the waterproofness at the joint portion is further improved.

Another embodiment of the present invention will be described with reference to FIGS. FIG. 8 shows an embodiment in which the method of attaching the auxiliary slit member is different. The auxiliary slit member 30 is formed by attaching an L-shaped connecting piece 30b to a side surface of a main body 30a having the same shape as the auxiliary slit member in the above-described embodiment so that corner portions of the respective members are close to each other. In this case, when the holder 5a on the outdoor side is fitted to the vertical slit member 5, the rising portion of the connecting piece 30b is sandwiched between the vertical slit member 5 and the vertical slit member 5. Thereby, the positioning work of the vertical slit member 5 becomes easier as compared with the above embodiment. Next, in the embodiment shown in FIG. 9, the vertical slit member 5 and the holder 5a on the outdoor side are cut in accordance with the inclined surface 8a of the second slit member 8 without using the auxiliary slit member. . Also,
Instead of placing the vertical slit member 5 on the upper surface of the horizontal slit member 8 as in each of the above embodiments, as shown in FIG.
The vertical slit member 5 may be placed on the upper surface of the auxiliary slit member 40. The auxiliary slit member 40 used here is formed in a prismatic shape according to the thickness (slit width) and length of the horizontal slit member 8, and is attached to the end of the second slit member 8. You. Although not shown, the length of the first slit member 7 is made longer than the second slit member 8 by an amount corresponding to the thickness (slit width) of the vertical slit member 5,
The vertical slit member 5 may be placed on the extra length. In any case, since there is substantially no gap between the vertical slit member 5 and the horizontal slit member 8 into which the poured concrete can enter, the same operation and effect as in the above embodiment can be obtained. .

In each of the above-described embodiments, the horizontal slit member is described as an example in which the horizontal slit member is formed of two types of slit members whose side surfaces are inclined linearly. However, the present invention is not limited to this. Absent. For example, the side surface of the upper horizontal slit member may be curvedly inclined, and there is no problem in using a lower slit member having a rectangular cross section. Further, various modifications within the technical idea of the present invention are possible, such as changing the shape and material of the holder or the support, changing the construction procedure, and the like.

[0018]

As described above, in the slit structure of the non-structural wall in the concrete building according to the present invention,
Along the joint between the non-structural wall and the structural framework such as a column or beam, the vertical slit material and the horizontal slit material with the outdoor side surface formed in an inclined shape are installed at each part. The gap between the end face and the inclined side face of the horizontal slit material is prevented from being able to penetrate concrete, so the strength around the concrete wall is low, leading to cracks and spalling. No small protrusions are formed. This allows
A practically excellent effect that water stoppage on the wall surface is greatly improved can be obtained.

[Brief description of the drawings]

FIG. 1 is an overall explanatory view of a slit structure of a non-structural wall according to the present invention.

FIG. 2 is a longitudinal sectional view showing a main part of the slit structure shown in FIG.

Fig. 3 When placing concrete on the lower floor,
It is a perspective view which shows the attachment state of the 1st horizontal slit material with respect to a vertical formwork.

FIG. 4 is a perspective view showing a state where a second horizontal slit member and an auxiliary slit member are installed after concrete on a lower floor is cast.

FIG. 5 is a perspective view of an auxiliary slit material used in the present invention.

FIG. 6 is a perspective view showing a state in which a vertical slit member is placed on a second horizontal slit member.

Fig. 7 When placing concrete on the upper floor,
It is a partially cutaway perspective view showing a state where inner and outer vertical forms are installed.

FIG. 8 is an exploded perspective view showing another example of a method for fixing the auxiliary slit member.

FIG. 9 is a perspective view showing an application state of a vertical slit member used in another embodiment.

FIG. 10 is a perspective view showing an application state of an auxiliary slit material used in another embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Non-structural wall, 2 ... Column, 3, 4 ... Beam, 5 ... Vertical slit material, 6 ... Horizontal slit material, 7 ... First slit material, 8 ...
Second slit material, 8a: inclined surface, 9a, 9b: joint, 10, 40: auxiliary slit material, 11a, 11b: backup material, 12: caulking material, 13, 15: joint bar, 14, 16, 17 ... vertical formwork, 20 ... support

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2E001 DA01 DG02 DH31 DH35 EA02 EA04 FA01 FA02 FA03 FA52 FA53 FA64 FA71 GA07 GA60 HA32 HB01 HD08 HD13 HE01 HF02 KA03 LA04 LA09 LA12 MA02 MA06 MA15

Claims (3)

[Claims] 1. A vertical slit member and a horizontal slit member having an outdoor side surface that is an inclined surface extending in the longitudinal direction are provided along a joint between a non-structural wall and a structural framework such as a column or a beam. A slit structure of a non-structural wall embedded in the vertical slit material, the side surface of which is substantially the same as or lower than the lower end edge of the inclined surface of the horizontal slit material, substantially at the lower end surface side. The slit structure of the non-structural wall, wherein the slit structure is connected to the horizontal slit member in a state where no gap is formed. 2. The non-structural wall according to claim 1, wherein a gap formed between an end surface of the vertical slit member and an inclined surface of the horizontal slit member is supplemented by an auxiliary slit member. Slit structure. 3. The slit structure of a non-structural wall according to claim 1, wherein an end of the vertical slit member is an inclined end surface that can be fitted to an inclined surface of the horizontal slit member.