KR20120109985A - Construction structure of underground outer wall - Google Patents

Abstract

PURPOSE: A construction structure of an underground exterior wall is provided to improve the construction performance of an exterior material. CONSTITUTION: A construction structure of an underground exterior wall is formed by inserting stiffeners(4) between nail heads and bearing face plates(2). The nail heads fix the bearing face plates to a structural member. The stiffeners prevent punching shear.

Description

CONSTRUCTION STRUCTURE OF UNDERGROUND OUTER WALL}

This invention relates to the construction structure of the base of an outer wall for improving the seismic performance of a house at the time of exterior reform of a wooden construction house.

BACKGROUND ART Conventionally, as a method of improving the seismic performance of a wooden construction house, there is a structure in which an iron brace material or a frame material is provided outside the building and reinforced. However, such a method has an advantage that construction can be performed while living because of the exterior type construction. However, since the brace material and the frame material are provided on the outside of the outer wall, the beauty of the house is greatly reduced.

On the other hand, the method of improving the seismic performance by constructing from the inside of the building can be reused while leaving the existing exterior wall intact, but the habitability during the construction period is greatly impaired, and the repair work is inexpensive at all costs. Despite this, the quality improvement, such as renewing the exterior of the house, cannot be achieved.

However, if years have passed since the house was also built, a mismatch occurs between the lifestyle of the occupant and the layout or interior of the room. Therefore, there is a demand for reforming the interior of a building in accordance with the change of the residents' lifestyle, and the demand for exterior reforming to renovate the exterior of the building in addition to the interior reform is increasing these days.

Implementing interior and exterior reforms in accordance with the seismic reinforcement of buildings is desirable in that it does not waste resources compared to building new buildings.

By the way, as a method of simultaneously improving the earthquake-proof performance of a building according to exterior reforming in a wooden construction house, the method of using a bearing face material as an exterior wall base material is known.

The method of using the bearing face material as the outer wall base material is to remove the existing outer circumference wall, and to repair the frame after ageing or deterioration of the frame and to properly arrange the joining hardware. It is a construction method which finishes siding etc. of urinary industry. The construction method is widely known as a construction method capable of simultaneously performing seismic reinforcement and exterior reforming in response to various construction specifications.

Japanese Unexamined Patent Publication No. 2010-7454 Japanese Laid-Open Patent Publication 2006-28805 Japanese Laid-Open Patent Publication 2003-3676 Japanese Laid-Open Patent Publication 2003-3592

By the way, in the wooden house, when the exterior reform is performed using the bearing face material as the outer wall base material, the difference in the structure of the base such as the size of the column, the presence or absence of a pillar, and the pillar, the general wall part, the corner wall part, the opening Optimum seismic reinforcement is required according to various construction situations of existing buildings, such as the difference of the parts such as walls. Seismic reinforcement of existing buildings is designed to have seismic design already completed. Therefore, unlike new earthquake-proof design, new earthquake-resistant design must be restricted. Therefore, a high wall strength magnification may be required only for some of the bearing walls.

As a method of increasing the wall strength magnification only for a part of the bearing walls, a method of changing the wall strength magnification by increasing the surface weight of the bearing face material, for example, by changing the type of bearing face material in accordance with the required wall strength magnification. However, the method of partially changing the type of bearing face increases the type of bearing face, thereby impairing workability. In addition, it is also possible to change the thickness while using the same type of bearing face material, but this method generates unevenness of the wall base material, and this method also greatly impairs the workability.

As a method of increasing the wall strength magnification other than the above method, a method of increasing the number of nails for fixing the bearing face material to the structural member of a wooden construction house or increasing the thickness of the nail can be considered. However, increasing the number of nails causes cracking of the bearing face member or structural member and increases the possibility of construction failure. On the other hand, in the method of thickening the nail, the fracture of the bearing face material by the nail head, that is, the punching shear (Punching Shear) occurs, the risk that the bearing face material is broken into nails increases. In particular, when the weight ratio of the bearing face is low, the risk of destruction increases. It is not easy to increase the wall strength magnification by the method of increasing the number of nails or the thickness of the nails in this way.

By the way, in performance required as a bearing face material, air permeability for discharging the moisture inside a house to the outside of a house is one of the important performances. As such a breathable bearing face material having a low specific gravity having an air-dried gravity of about 0.6 to 1.0, such as, for example, softwood plywood, MDF, volcanic glass laminate, and pulp and siliceous mixed cement plate, etc. Is known. However, since these bearing faces have a low specific gravity, nail holding power is low and punching shear is also likely to occur, so it is not easy to obtain a high wall strength magnification.

The present invention aims to solve the above problems, and in exterior reforming of a wooden construction house using a bearing surface material having high air permeability as an exterior wall base material, the degree of freedom of seismic design is increased, and the urine industry siding after seismic reinforcement and the like. The purpose of the present invention is to obtain an outer wall base which further facilitates the workability of the exterior material.

In order to solve the problem as described above,

In the invention according to claim 1, in the exterior reform of a wooden construction house using the bearing face material as the outer wall base material, the nail head and the bearing face material for fixing the bearing face material of the wall requiring a high wall strength magnification by the seismic design to the structural member In the meantime, the construction structure of the base of an outer wall based on the reinforcement for preventing punching shear is interposed.

In the invention according to claim 2, the reinforcing material is temporarily fixed to the bearing face material in advance.

In the invention according to claim 3, the reinforcing material is continuous over two or more nails.

In the invention according to claim 4, the kind and thickness of the bearing face material of the wall where a high wall strength magnification is required and the bearing face material of the wall that do not require a high wall strength magnification are the same by the seismic design.

In the invention described in claim 5, the type and dimension of the nail are single.

In invention of Claim 6, the said reinforcing material is made into a sheet steel plate.

In the invention according to claim 7, the reinforcing material is a sheet selected from a glass fiber sheet and a carbon fiber sheet.

Hereinafter, the operation and effect of the present invention will be described.

As a judgment value which evaluates the means for increasing wall strength magnification, it evaluated using the shear strength of one side of nail joint. As a method of measuring the shear strength of nail joints having the bearing face as the side member, the standard permissible stress and the standard stiffness of the joints of the Tobyo Architectural Association 2002 By the test), the shear strength of one side of the nail joint was measured.

In this test, cedar was used as the structural member 1 as the main material, structural plywood having a thickness of 9 mm, and volcanic glass laminate (trade name Dailite MS manufactured by Daiken Kogyo Co., Ltd.), double-sided acrylic resin as the bearing member 2 as the side material. Painted pulp and siliceous mixed cement board (brand name Anshin made by Nichiha Corp.) and nail (3) include general round wire ails N50 and general iron nail N75 (JISA5508: 2009), reinforcement (4) As a test | inspection, the test was done using the 0.35 mm coating molten 55% aluminum-zinc alloy plated steel plate (JISG3322: 2008).

1 is a schematic view of measuring the shear strength of nail joints using a bearing face material as a side material without using the reinforcing material 4.

Fig. 2 is a schematic diagram of the structure using the reinforcing material 4 to measure the shear strength of nail joints using the bearing face material as the side material.

Table 1 shows the results of the above test.

When the load 5 is applied using the nail 3 of N50 without using the reinforcing material 4, as shown in FIG. 3, the nail head 3a moves to the bearing surface material 2 as shown in FIG. 3. A case where the nail 3 is not dug into and does not occur, and a pull out, which is a fractured form of the nail joint, in which the nail body 3b exits from the structural member 1 occurs. The maximum load at this time was 1094 N for structural plywood, 841 N for volcanic glass laminate, and 1220 N for double-sided acrylic resin-coated pulp and siliceous mixed cement board.

In the case where the load 5 is applied using the nail 3 of N75 without using the reinforcing material 4, as shown in FIG. 4, the nail body portion 3b is removed from the structural member 1 as shown in FIG. 4. Before exiting, a punching shear, a form of destruction of the nail joint, in which the nail head 3a digs into the bearing face member 2 and exits the bearing face member 2, has occurred. The maximum load at this time was 1616 N for structural plywood, 996 N for volcanic glass laminate, and 1991 N for double-sided acrylic resin-coated pulp and siliceous mixed cement board.

When the load 5 is applied using the nail 3 of N75 using the reinforcing material 4, as shown in FIG. 5, the nail head 3a is dug into the bearing surface material 2 as shown in FIG. 5. The case where the nail 3 falls out does not occur, and pull-out, which is a fractured form of the nail joint, in which the nail body portion 3b comes out of the structural member 1 occurs. The maximum load at this time was 2338 N for structural plywood, 1750 N for volcanic glass laminate, and 2262 N for double-sided acrylic resin-coated pulp and siliceous mixed cement board.

As described above, according to the construction structure of the base wall of the outer wall according to the present invention, even if the structure of the bearing face material 2, the structural member 1 and the nail 3 that punching shear is likely to occur, the nail head 3a and the bearing face material Since the punching shear can be prevented by interposing the reinforcing material 4 between (2), the shear strength of the nail joint of a high load value can be obtained.

Therefore, in the exterior reform of a wooden construction house, between the nail head for fixing the bearing face member as the outer wall base member and the bearing face member, a construction structure in which a reinforcement material for preventing punching shear is interposed is calculated by the seismic design calculation. By employing a wall that requires a high wall strength magnification, it is possible to obtain a high wall strength magnification even when using a bearing face material having good air permeability but weak draw strength due to nail hair. Therefore, even if one type of nail is used for the same type and thickness of bearing members, the wall base without the unevenness can be constructed. Therefore, it is necessary to mix the wall of the high wall strength magnification with the wall of the normal wall strength magnification. It becomes possible.

Therefore, when the construction structure of the outer wall base of the present invention is used, it is not necessary to use additional reinforcing brackets to increase the wall strength magnification, and since the base wall of the smooth surface can be made without the unevenness, the construction of the exterior material becomes easy. In addition, since a breathable proof face member can be used, only a wall having a high wall strength magnification can be obtained by a high wall strength magnification by calculating the seismic design by adopting a breathable proof face member. It is possible to select the construction structure of the outer wall base, which is high in construction and excellent in workability.

1 is a schematic view of measuring the shear strength of nail joints using the bearing face as the side material in a configuration not using the reinforcing material 4;
FIG. 2 is a schematic view of measuring the shear strength of nail joints with the configuration using the reinforcing material 4 as the side face of the bearing face material. FIG.
3 is a cross-sectional view illustrating a drawing state in measuring shear strength of the nail joint of FIG. 1.
4 is a cross-sectional view illustrating a state of the punching shear in measuring shear strength of the nail joint of FIG. 1.
5 is a cross-sectional view illustrating a state of drawing in measuring shear strength of the nail joint of FIG. 2.
6 is a view for explaining the construction of a wooden construction house.
FIG. 7 is a view for explaining a load bearing surface member as an outer wall base member constructed in the wooden construction of FIG. 6 in normal construction; FIG.
FIG. 8 is a view for explaining the bearing face material as an outer wall base material constructed in the wooden structure of FIG. 6 in a high magnification construction as an example of the present invention. FIG.
Fig. 9 is a view for explaining the bearing face material as an outer wall base material constructed in the wooden construction of Fig. 6 in a high magnification construction as another example of the present invention.

EMBODIMENT OF THE INVENTION Hereinafter, the best form for implementing this invention is demonstrated concretely according to drawing.

In the construction structure of the outer wall base of the present invention, seismic reinforcement of the outer wall portion of the existing conventional wooden construction house, and after removing the existing outer wall material, the earthquake-resistant reinforcement with the bearing surface material as the outer wall base material, and then finishing the urine industry siding, etc. Construct the ashes and perform external reforming.

The seismic reinforcement design performs earthquake-proof design using the column size, the structure of a construction, and the wall strength magnification of each construction specification determined for each bearing face material set for each site | part.

Fig. 6 is a view showing the construction of a wooden construction house, which is an explanatory view of a lower leg of a general wall part where there is regard, where 8 is a girder, 9 is regarded, 10 is a pillar, 11 is a reinforcement, and 12 is Underlying 13 is regarded as a connection.

First, the outer wall of the place where the reform of the house which performs exterior reforming is constructed is peeled off, and a frame is exposed. If the foundation, pillar, etc. are deteriorated or deteriorated, repairs or exchanges are performed.

In this invention, the cross-sectional dimension of a pillar, a base, a beam, a girder, and a purlin is 105 * 105 mm or more, and the end of a bearing wall is a pillar. In addition, the dimensions of the core are to be 27 × 105 mm or more, and the cross-sectional dimensions of the joints to connect the bearing face material are to be 45 × 105 mm or more.

When the cross-sectional dimension of a pillar differs, an outer surface can be matched with the adjustment material, such as a wood, but an adjustment material is reliably attached to a pillar and a core using a general iron nail etc.

Capital and column bases should be taken to prevent draws in accordance with the wall magnification (effective magnification) of the part in accordance with a plan for seismic retrofit.

FIG. 7 is an example in which the bearing face member 2 is constructed as the outer wall underlayment in the base tank of the general wall portion in which there is regarded in FIG. 6 in general construction, and the bearing face member 2 is the nail 3 of the N50. In the outer periphery, the column 10, the base 12, the girder 8, the core 9, etc., are embedded in the interval of 100 mm or less and in the middle barrel of 200 mm or less. At this time, the edge distance (the nailing position from the bearing face end) of the nail 3 is about 15 mm. In the column 10, the base 12, the girder 8, etc., since there is room for the podium distance, the podium distance is increased a little, and the locking value of the base 12, the pole 10, etc. is 30 mm or more. It is done. Nailing of nail 3 is performed in the part which has a lower leg, and it is prevented that nail | nail 3 lacks nailing and it does not push too much.

FIG. 8: is an example which built the bearing face material 2 as an outer wall base material with respect to the base tank of the general wall part which is regarded in FIG. 6 in high magnification construction. The reinforcing material 4 is easy to install when the load bearing member 2 is placed flat and temporarily fixed to the bearing member 2 with a curing tape or the like. At this time, the end portions of the bearing face material 2 and the reinforcing material 4 are aligned and temporarily fixed.

Moreover, when adhesive tape is affixed on the surface which contact | connects the bearing face material 2 of the reinforcing material 4 previously, there is no need to use a curing tape, and workability and construction quality improve.

Mounting of the bearing face member 2, the outer peripheral portion of the nail (3) of the N50 from 100mm interval or less from the reinforcement (4), less than 200mm interval in the middle barrel column 10, base 12, girder 8, I put it in the back (9). At this time, the edge distance (the nailing position from the bearing face end) of the nail 3 is about 15 mm. In addition, the locking value to the base 12, the pillar 10, etc. shall be 30 mm or more. Nailing of nail 3 is performed in the part which has a lower leg, and it is prevented that nail | nail 3 lacks nailing and it does not push too much.

The bearing face member 2 is rectangular and has a predetermined standard dimension, and has strength or function as a bearing wall. For example, structural plywood conforming to the JAS standard, particle board conforming to the JIS standard, MDF, volcanic glass laminate, etc. It consists of a pulp and a siliceous mixed cement board etc., It has predetermined airtightness and moistureproofness, It may consist of two or more types of composite boards other than a single | mono layer board.

Particularly preferable bearing face material 2 in the present invention is a breathable load-bearing face material having a specific gravity of about 0.6 to 1.0, such as softwood plywood, MDF, volcanic glass laminate, and pulp-siliceous mixed cement board.

The reinforcing material 4 is coated with iron, stainless steel, titanium, aluminum, zinc alloy plated steel sheet, enamel steel sheet, clad steel sheet, laminated steel sheet (vinyl chloride steel sheet, etc.), sandwich steel sheet (dust damping sheet, etc.) (of course, various color tones). It is preferable that the sheet steel sheet is thick enough to easily penetrate a nail of about 0.1 to 3.0 mm in thickness, such as a colored metal plate, and the reinforcing material 4 is fixed to the bearing face member 2 with the nail 3. If the reinforcing material 4 is temporarily fixed to the bearing face material 2 by adhesion or the like with an adhesive, a double-sided tape, or the like beforehand, handling becomes easier. Forming the reinforcing material 4 from the thin steel sheet is effective not only when forming the strength-bearing plate 2 to the frame, but also to form a bearing wall having excellent seismic resistance. Since it is not so large, it is easy to carry and construct, and to improve the seismic resistance of the bearing wall at low cost.

As the reinforcing material 4, in addition to the thin steel sheet, if the material is hard to penetrate, such as a glass fiber sheet, a carbon fiber sheet, or the like, the reinforcing material 4 can be used as a thin steel sheet.

As shown in Fig. 8, the reinforcing material 4 is formed by combining two steel sheets having a long, elongated strip shape, or an integrally formed steel sheet, although not shown, with an adhesive or double-sided tape. When it sticks to the surface of and arrange | positions to the bearing surface material 2, workability improves.

As shown in FIG. 9, when the reinforcing material 4 is combined with a reinforcing material having a single length, the reinforcing material 4 is bonded to the surface of the bearing face material 2 with an adhesive or a double-sided tape and placed on the bearing surface material 2. Single length results in fewer material points.

Table 2 shows the wall strength magnification of the base wall of the present invention. Usually, construction is a construction structure which does not use the reinforcement 4, and high magnification construction is a construction structure which uses the reinforcement 4. As for the construction condition, the bearing face plate 2 is made of pulp and siliceous mixed cement board, and the nail 3 is made of N50, and the size of the column 10 is 105 mm or more. Condition. As the reinforcing material 4 of the high magnification construction, a coated molten 55% aluminum-zinc plated steel sheet of JIS G 3322: 2008 having a thickness of 0.35 mm × width of 30 mm was used.

High magnification construction has a wall strength magnification of 7.8 kN / m and provides an excellent wall strength magnification compared to the wall strength magnification of 6.5 kN / m that is typically constructed. The construction specification of the high magnification construction is applied to the wall which requires high wall strength magnification by the seismic design.

What has been described above is only one embodiment of the construction structure under the outer wall of the present invention, and the present invention is not limited to the description of the above embodiments unless the main purpose thereof is exceeded.

1 structural material
2 load bearing
3 nails
3a nails
3b nails
4 stiffeners
5 Load direction
6 Air gap part by nail inside structural material
7 punching shear
8 girder
9 regards
10 pillars
11 reinforcement
12 foundation
13 connection considered

Claims (7)

In exterior reform of wooden structure house which uses bearing face material as exterior wall base material,
The construction of the base wall of the outer wall, characterized in that a reinforcement for preventing punching shear is interposed between the nail head of the nail and the bearing face member for fixing the wall bearing face of the wall requiring a high wall strength magnification by the seismic design. . The construction structure of the outer wall base according to claim 1, wherein the reinforcing material is temporarily fixed to the bearing face material in advance. The construction structure for an outer wall base according to claim 1 or 2, wherein the reinforcing material is continuous across two or more nails. The wall-bearing face member of the wall which requires a high wall strength magnification by the seismic design and the kind and thickness of the wall-bearing face member which do not require a high wall strength magnification are the same. Construction structure of the outer wall lower surface made of. The construction structure of the outer wall base according to any one of claims 1 to 4, wherein the type and dimension of the nail are single. The construction structure of the outer wall base according to any one of claims 1 to 5, wherein the reinforcing material is a thin steel sheet. The construction structure of the outer wall base according to any one of claims 1 to 6, wherein the reinforcing material is a sheet selected from a glass fiber sheet and a carbon fiber sheet.

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