JP4591938B2 - Slit structure of non-structural wall - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an earthquake-resistant slit structure formed at a joint portion between a structural frame such as a column or a beam in a concrete building and a non-structural wall connected thereto.
[0002]
[Prior art]
In recent years, concrete buildings such as buildings have been called slit materials for the purpose of forming structural slits that serve as mechanical discontinuities for interlaminar displacement at the boundary between structural frames such as columns and beams and non-structural walls. The construction method using the buffer material to be used is spreading. The slit material is embedded so as to penetrate the wall or leave a predetermined wall thickness, and the building is structurally divided through the slit material. In other words, when an external force due to an earthquake is received, the deformation force generated in the building is blocked by the slit material embedded in the periphery of the non-structural wall to block the structural frame to avoid the shearing and brittle fracture of the building. It has become. This type of earthquake-resistant slit material includes a vertical slit material embedded near the boundary between a reinforced concrete building wall (non-structural wall) and a pillar connected to it, and a wall on the upper floor of the building. There is a horizontal slit material provided between the lower floor beams. Then, these two types of slit materials are appropriately combined and embedded around the non-structural wall, so that the non-structural wall is positively separated from the structural framework such as a column. As conventional examples of the horizontal slit material used here, those described in JP-A-11-336229 or JP-A-2001-3492 are known. Such a slit material has a side surface facing the joint portion side that is inclined downward, thereby preventing intrusion of rainwater from the joint portion, and at the same time a slit having a rectangular cross section before that This suppresses the generation of cracks in the vicinity of the joint portion of the outer wall surface, which has been a problem when a material is applied.
[0003]
[Problems to be solved by the invention]
By the way, when the horizontal slit material formed on the inclined side surface of this kind is used in combination with a general vertical slit material, both slit materials are embedded at substantially the same depth from the surface of the joint portion. Thus, it is necessary to place the lower end surface of the vertical slit material in contact with the upper surface of the horizontal slit material at a position where the side surfaces thereof are substantially coincident with each other. For this reason, a triangular prism-shaped gap remains between the inclined surface of the horizontal slit material and the lower end surface of the vertical slit material. Therefore, when concrete is placed, the concrete enters the small gap portion that is the intersection of both slit materials. As a result, a small protrusion protrudes from the side surface of the wall body into the joint at the lower end portion of the vertical joint formed on the outer surface side of the vertical slit member. Since these concrete protrusions are weak in strength, cracks are likely to occur even in minor earthquakes, leading to peeling from the wall surface in some cases.
[0004]
The present invention has been made in view of the problems of the prior art, and its object is to provide a slit structure with a non-structural wall that has improved water-stopping performance by fully exhibiting the advantages of a horizontal slit member having an inclined side surface. And
[0005]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, a vertical slit member and an outdoor side surface are inclined surfaces extending in the longitudinal direction along a joint portion between a non-structural wall and a structural frame such as a column or a beam. In the slit structure of the non-structural wall in which the slit material is embedded in each part, the vertical slit material has a lower surface at a position where the side surface is substantially the same as or in front of the lower edge of the inclined surface of the horizontal slit material. It is characterized in that it is connected to the horizontal slit material in a state in which a gap is not substantially formed on the side.
[0006]
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 material is replaced with the horizontal slit material in which the side surface on the outdoor side is inclined. Since it is placed or attached so that there is almost no gap in the abutting portion, the placed concrete does not enter the inside of the vertical joint. Therefore, there is no small concrete protrusion that leads to cracks or peeling off at the lower end of the vertical wall side of the concrete wall body, so the water-stopping feature, which is a major feature of the horizontal slit material with the inclined side surfaces, is exhibited as it is. Thus, the water stoppage of the entire wall surface is greatly improved.
[0007]
There are several methods for making the connecting portion of the vertical slit material and the horizontal slit material substantially free of voids. 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 inclined surface when placed on the upper surface of the horizontal slit material On the other hand, an auxiliary slit material formed in a similar three-dimensional shape in advance may be compensated. Moreover, it is good also as an inclined end surface which can be fitted to the inclined surface of a horizontal slit material for the edge part of a vertical slit material, and in any case, it is effective in the improvement of a water stop.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
In the slit structure of the non-structural wall according to the present invention, as the material of the vertical slit material installed between the column portion and the non-structural wall, and the horizontal slit material installed between the beam portion and the non-structural wall, Basically, any material whose volume is appropriately reduced when subjected to a compressive force may be used. Specific examples include foamed polymer materials typified by foamed polyethylene, calcium silicate plates, and calcium carbonate foamed materials, but of course not limited thereto. In addition, when using the auxiliary slit material, as a fixing means, for example, sticking to the inclined side surface of the horizontal slit material with an adhesive tape or adhesive, or sticking to the end surface of the vertical slit material, This is convenient.
[0009]
【Example】
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 an unstructured 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 columns 2 and 2 on both sides, a beam 3 and a beam 4 on a lower floor, and a vertical slit material 5 is also provided between the columns 2 and 2 and a lower layer. A horizontal slit member 6 is buried between the floor beam 4 and the structural frame such as the column 2 and the beam 4 so as to be structurally divided. FIG. 2 is a longitudinal sectional view showing the intersection of 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 is composed of a first slit member 7 disposed on the beam 4 side of the lower floor and a second slit member 8 disposed on the lower end side of the non-structural wall 1 of the upper floor. Has been. The vertical slit material 5 is placed on the upper surface of the second slit material 8 at a position where the side surfaces thereof substantially coincide with each other. The horizontal joints 9a and the vertical joints 9b connected to the outside of the side surfaces of both the slit members 5 and 6 are filled with the caulking 12 material via the backup materials 11a and 11b.
[0010]
Here, the first slit member 7 is made of a material having moderate elasticity such as foamed polyethylene, and is formed in a trapezoidal shape with one side surface inclined and a through-hole (not shown) penetrating in the vertical direction. 2) are provided along the longitudinal direction. And the inside of the horizontal joint part 9a formed in the predetermined position, ie, the outer surface upper end part of the beam 4 of the lower floor which makes a part of non-structure wall in the state fixed to the holding | maintenance part 21 of the support tool 20 mentioned later Are arranged along the longitudinal direction. The second slit member 8 has the same thickness (corresponding to the slit width) and the other slit member formed in a rectangular cross section with the one slit member body 8b having the inclined surface 8a on the joint portion 9a side. An incombustible material 8d such as rock wool is provided between the main body 8c, and these are sandwiched from two surfaces by two resin cloth tapes (not shown). In this case, both of the slit material bodies 8b and 8c are made of foamed polyethylene. And it is juxtaposed on the upper surface of said 1st slit material 7 in the inclined side edge part containing this inclined surface 8a. 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 the use conditions and the like. In addition, the inclined surface 8a is not necessarily linear, and may be an inclined curved surface that gradually decreases in a curved manner toward the outside. In either case, the effect is not very different.
[0011]
Here, the support 20 for fixing the first slit member 7 at a predetermined position includes an L-shaped holding section 21 and a rising wall of the holding section 21 as shown in an enlarged view in FIG. It consists of a connecting portion 22 having a substantially U-shaped cross section provided on the back side in common. The connecting portion 22 is used for fitting with the joint rod 13 during installation. Further, in this embodiment, the anchor portion 23 is integrally formed obliquely below the horizontal portion of the holding portion 21 and a hole (not shown) is provided in the horizontal portion. Note that a plurality of holes are provided at predetermined intervals along the longitudinal direction of the support 20 as a whole. In addition, a synthetic resin such as polyvinyl chloride is suitable for the material, but other materials such as metal have no problem.
[0012]
Next, the construction procedure of the non-structural wall according to the present invention will be described with reference to FIGS. First, the joint rod 13 for the horizontal joint is fixed horizontally with a nail or the like at a predetermined position of the vertical formwork (outer formwork) 14 on the lower floor, that is, a position corresponding to the joint portion 9a in the horizontal direction in FIG. Subsequently, the support member 20 in a state where the first slit member 7 is fixed to the holding portion 21 via an adhesive tape or the like is fitted into the connecting portion 22 from the back side of the joint rod 13, thereby One slit member 7 can be easily and reliably fixed to the vertical mold 14. Here, if a headless nail is further driven from the inclined surface side of the first slit member 7, the fixing strength is further increased. Alternatively, the first slit member 7 may be attached to the holding portion 21 after only the support tool 20 is fitted to the joint rod 13. Then, an appropriate inner mold (not shown) is installed and concrete on the lower floor is placed up to the upper surface position of the first slit material 7. In this case, the through holes 7a provided in the first slit material 7 communicate with the holes of the support tool 20, respectively, and as a result of these functioning as air vent holes, when placing concrete on the lower floor, Air does not collect on the back side of the joint rod 13 and the support 20 protruding in the horizontal direction with respect to the vertical formwork 14, and a dense concrete filling state is obtained.
[0013]
As shown in FIG. 4, after the concrete 4 on the lower floor is hardened, the second slit material 8 is placed at a predetermined position on the surface and fixed to the concrete surface of the lower floor via an adhesive tape, concrete nails or the like. Further, the auxiliary slit material 10 is fixed to the inclined surface 8a of the second slit material 8 at a position where the vertical slit material is to be placed. The auxiliary slit material 10 is made of the same material as the first slit material 7 or the second slit material 8, and as shown in an enlarged view in FIG. The cross section is a column having a right-angled triangular cross section that can make the slit material body 8b a substantially rectangular cross section in contact with 8a. In this case, an appropriate adhesive tape 10b such as a butyl tape is attached to the inclined surface portion of the main body 10a, that is, the contact surface of the second slit material 8 with the inclined surface 8a. Can be pasted on. Subsequently, as shown in FIG. 6, the vertical slit member 5 in which the appropriately shaped holders 5 a and 5 b are fitted to both side portions is substantially coincident with the corner portion of the main body 10 a of the auxiliary slit member 10. To be placed. Then, as shown in FIG. 7, the upper floor outer mold frame 16 and the inner mold frame 17 to which the joint rod 15 for the vertical joint is fixed in advance at a predetermined position are placed, and the upper floor concrete is placed. After the concrete is hardened, the outer mold 16 and the inner mold 17 are removed while the joint rod 15 is fixed. Further, in the vertical and horizontal joint portions 9a and 9b after the joint rods 13 and 15 are removed, the backup members 11a and 11b are respectively attached to the support tool 20 and the holding tools 5a and 5b in place of the joint rods 13 and 15. If the caulking material 12 is filled in the outside of the groove, the slit structure of the non-structural wall according to the present invention is formed (see FIG. 2). Although not shown, an anchor reinforcing bar is embedded between the outer wall 1 of the upper floor and the beam 4 of the lower floor so as to penetrate the second slit member 8, and concrete adheres to the upper surface side. Covered with a bottomed cylindrical plastic cover. Moreover, although the Example demonstrated the case where it installed so that the lower end edge of the 2nd slit material 8 might become substantially flush with the outdoor side surface of the 1st slit material 7, the 2nd slit material 8 was 1st. In this case, the columnar shape of the auxiliary slit material 10 is also changed from a right triangle to a right angle. What is necessary is just to change to trapezoid shape.
[0014]
Thus, in this invention which forms a slit structure around the non-structure wall 1 using the horizontal slit material 8 and the vertical slit material 5 which become the inclined surface 8a which the outdoor side becomes a longitudinal direction, both slit materials 5, Since there is substantially no gap in which concrete can enter at the abutting portion of 8, when placing the concrete of the upper floor, the strength projecting into the joint portions 9 a and 9 b from the side surface of the non-structural wall 1 The concrete is surely filled only in necessary places in the concrete molds 16 and 17 without forming weak portions. For this reason, it is hard to produce the crack in the outer wall lower end part and the peeling of the concrete which were the cause of the water-stop reduction locally in the prior art, and the water-stopping performance as a whole improves greatly.
[0015]
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, the vertical molds 16 and 17 and the joint rod 15 are used. It is not pulled out together when removing. In addition, when using the 2nd slit material 8 which has the nonflammable material 8d as shown in FIG. 2, or the slit material lacking in fire resistance, what consists of a material rich in fire resistance as the caulking material 12 is applied. Is desirable. Furthermore, when a water-stopping material such as a butyl rubber sheet is provided on the bottom surface portion adjacent to the inclined surface 8a of the second slit material 8 and the first slit material 7, the waterproofness at the joint portion is further improved.
[0016]
Furthermore, another embodiment of the present invention will be described with reference to FIGS. FIG. 8 shows an embodiment in which the attachment method of the auxiliary slit material is different. This auxiliary slit member 30 is an L-shaped connecting piece 30b attached to the side surface of a main body 30a having the same shape as the auxiliary slit member in the above-described embodiment so that the corner portions thereof are close to each other. In this case, the vertical slit member 5 can be integrated with the vertical slit member 5 by sandwiching the rising portion of the connecting piece 30b when the outdoor-side holder 5a is fitted. Thereby, the positioning work of the vertical slit member 5 is facilitated as compared with the above embodiment. Next, in the embodiment shown in FIG. 9, the vertical slit material 5 and the outdoor-side holder 5 a are cut according to the inclined surface 8 a of the second slit material 8 without using an auxiliary slit material. . Further, instead of placing the vertical slit material 5 on the upper surface of the horizontal slit material 8 as in the above embodiments, the vertical slit material 5 may be placed on the upper surface of the auxiliary slit material 40 as shown in FIG. Good. The auxiliary slit material 40 used here is formed in a prismatic shape matching the thickness (slit width) and length of the horizontal slit material 8 and is attached to the end of the second slit material 8. The Although not shown, the length of the first slit material 7 is increased by an amount corresponding to the thickness (slit width) of the vertical slit material 5 with respect to the second slit material 8, The vertical slit material 5 may be placed. In any case, since there is substantially no gap between the vertical slit member 5 and the horizontal slit member 8 into which the placed concrete can enter, the same effect as the above embodiment can be obtained. .
[0017]
In each of the above-described embodiments, the horizontal slit material has been described as being composed of two types of slit materials whose side surfaces are linearly inclined. However, the present invention is not limited to this. For example, the side surface of the upper horizontal slit material may be inclined in a curved manner, and there is no problem in using the lower slit material having a rectangular cross section. Furthermore, various modifications can be made within the technical concept of the present invention, such as changing the shape and material of the holder or the support, or changing the construction procedure.
[0018]
【The invention's effect】
As described above, in the slit structure of the non-structural wall in the concrete building according to the present invention, the vertical slit material and the outdoor side surface are inclined along the joint portion of the non-structural wall and the structural frame such as a column or a beam. When installing the horizontal slit material formed in each part, the vertical slit material shall be such that there is no void that can enter the concrete between the end surface and the inclined side surface of the horizontal slit material. Therefore, a small projecting portion weak in strength that leads to cracking or peeling off is not formed around the concrete wall. Thereby, the practically superior effect that the water stoppage in a wall surface improves greatly is acquired.
[Brief description of the drawings]
FIG. 1 is an overall explanatory view of a slit structure of an unstructured 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 is a perspective view showing a state in which a first horizontal slit member is attached to a vertical mold when placing concrete on a lower floor.
FIG. 4 is a perspective view showing a state in which a second horizontal slit material and an auxiliary slit material are installed after placing concrete on a lower floor.
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 material is placed on a second horizontal slit material.
FIG. 7 is a partially cut perspective view showing a state in which inner and outer vertical molds are installed when placing concrete on an upper floor.
FIG. 8 is an exploded perspective view showing another example of a method for fixing the auxiliary slit material.
FIG. 9 is a perspective view showing an application state of a vertical slit material used in another embodiment.
FIG. 10 is a perspective view showing an applied 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 portion, 10, 40 ... Auxiliary slit material, 11a, 11b ... Backup material, 12 ... Caulking material, 13, 15 ... Joint rod, 14, 16, 17 ... Vertical formwork, 20 ... Supporting tool

Claims (3)

A non-structure in which a vertical slit material and a horizontal slit material with a sloped surface extending in the longitudinal direction on the outdoor side are embedded in each part along a non-structural wall and a structural frame joint such as a column or beam. In the slit structure of the wall, the side surface of the vertical slit member is substantially the same as the lower end edge of the inclined surface of the horizontal slit member or a front side thereof, and no gap is substantially formed on the lower end surface side. A slit structure of an unstructured wall characterized by being connected to the horizontal slit material in a state. The slit structure of the non-structural wall according to claim 1, wherein a gap formed between an end face of the vertical slit member and an inclined surface of the horizontal slit member is filled with an auxiliary slit member. The slit structure of the 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 material.

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