KR20220074078A - Eco hybrid timber slab - Google Patents

Abstract

The present invention relates to an eco-friendly hybrid wood slab, and more particularly, to a wood slab having high rigidity by combining a wood plate material and concrete with a notch-type joint.
A wood slab according to an embodiment of the present invention includes a wood board having a predetermined thickness, a prefab concrete coupled to the wood board by surface bonding, and a high for combining the wood board and the prefab concrete. includes government.
According to a preferred feature of the present invention, it is characterized in that it further comprises a plurality of notches that are formed through a predetermined depth on one surface of the wood board and are uniformly arranged with respect to the entire area of the wood board.

Description

Eco-hybrid timber slab {Eco hybrid timber slab}

The present invention relates to an eco-friendly hybrid wood slab, and more particularly, to a wood slab having high rigidity by combining a wood plate material and concrete with a notch-type joint.

Unless otherwise indicated herein, the material described in this section is not prior art to the claims of this application, and inclusion in this section is not an admission that it is prior art.

Recently, as it has been revealed that it is no longer an earthquake-safe zone due to the occurrence of several earthquakes centered on the southern sea area of Korea, interest in buildings or country houses with earthquake-resistant design is increasing, and among them, Interest is growing. In general, concrete buildings are the most used construction method in the construction of apartments or buildings, and are characterized by their robustness, but due to the wet construction method, the construction period is considerably long, the amount of carbon emission is large, and it is difficult to dispose of waste after use. . Next, in the case of a wooden building, it is possible to construct faster than a concrete building by a dry construction method, and one wooden house has the effect of storing 20.2 tons of carbon dioxide due to the carbon storage effect of the wood. Therefore, the use of wood has the advantage of being environmentally friendly, and it also shows excellent durability and insulation properties.

It has the advantage of being flexible in making exterior materials and shapes of the exterior, but it has disadvantages in that it takes considerably longer to construct and the cost is higher than that of a wooden building. Next, in the case of a wooden building, compared to a concrete building, the construction cost is low and quick construction is possible, and the use of wood has the advantage of being eco-friendly. In addition, it shows superiority in terms of durability and heat insulation.

Recently, as the world is affected by Corona 19, the construction site is experiencing difficulties such as a decrease in the number of on-site manpower and a delay in the construction period. Accordingly, there is a growing interest in construction methods that can reduce the construction period while minimizing the manpower required for construction and construction sites. On the other hand, in the pre-fabrication or prepab construction method, the materials or parts necessary for the construction of a wooden building are produced in advance at the factory, brought to the site and assembled, so the construction period or manpower can be minimized, and the resulting cost , for example, material costs, transportation costs, and other incidental costs for field personnel can be reduced.

In the case of a wooden building made of such a prefab method, durability is important, and in particular, it is necessary to secure durability by stably bonding a wooden wall to a wall or a wall to a slab. In constructing a wooden building made of a general prefab method, after installing the wall of the building, the slab is installed to form the floor of the floor. There was a problem in that the performance was low and the noise between floors was large. Accordingly, there is a need for a method for increasing the rigidity of the wood slab itself.

1. Korean Patent Registration No. 10-1705134 (2017.02.09 Announcement)

An object of the present invention is to provide a high-performance wood slab for increasing the rigidity of a wood slab by combining a wood plate material and concrete by notch bonding for a slab used for prefab construction. Eco-friendly materials (wood, eco-concrete) are used, and materials can be separated and discharged after use to maintain the eco-friendly concept until disposal, and to provide ease of transportation and installation through prefabrication.

In addition, it is not limited to the technical problems as described above, and it is obvious that another technical problem may be derived from the following description.

A wood slab according to an embodiment of the present invention includes a wood board having a predetermined thickness, a prefab concrete coupled to the wood board by surface bonding, and a high for combining the wood board and the prefab concrete. includes government.

According to a preferred feature of the present invention, it is characterized in that it further comprises a plurality of notches that are formed to penetrate by a predetermined depth from one surface of the wood planar material, and are uniformly arranged with respect to the entire area of the wood planar material.

According to a preferred feature of the present invention, the wood slab has a structure in which a plurality of wood modules are stacked, and the plurality of notches are formed in the wood module installed at the outermost side of the wood modules.

According to a preferred feature of the present invention, it is formed to protrude from one surface of the prefabricated concrete, and further comprises a protrusion having a diameter corresponding to the notch so as to be inserted into the notch formed in the wood plate material.

According to a preferred feature of the present invention, the fixing part is coupled and fixed by extending from the other surface of the prefab concrete to the notch through the protrusion.

According to the present invention, there is an advantage that the rigidity of the wood can be increased by notch bonding the prefab concrete to the wood plate material used for the prefab construction.

In addition, according to the present invention, it is possible to prevent the phenomenon of splaying between the wood board and the concrete due to vibration by the fixing part, and the shear force that may occur between the wood and the concrete can be prevented by generating resistance due to the notch. have.

In addition, according to the present invention, by adjusting the size of the bracket, it is possible to bond stronger than wood, and it is possible to design only by general bolting, and the wall on which the bracket is installed becomes one independent module, which has the advantage that various wall configurations are possible.

It should be understood that the effects of the present invention are not limited to the above-described effects, and include all effects that can be inferred from the configuration of the invention described in the detailed description or claims of the present invention.

1 is a perspective view of a wooden slab according to an embodiment of the present invention.
Figure 2 is an exploded perspective view of a wooden slab according to an embodiment of the present invention.
3A to 3D are detailed views of a wood board in a wood slab according to an embodiment of the present invention.
Figure 4 is a regular view of the prefabricated concrete in the wood slab according to an embodiment of the present invention.
5 is a detailed view of a state in which a wooden slab is installed according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, look at the configuration, operation and effect of the wooden slab according to the preferred embodiment. For reference, in the following drawings, each component is omitted or schematically illustrated for convenience and clarity, and the size of each component does not reflect the actual size. In addition, the same reference numerals refer to the same components throughout the specification, and reference numerals for the same components in individual drawings will be omitted.

A wood slab according to an embodiment of the present invention includes a wood board 10 having a predetermined thickness, a prefabricated concrete 20 coupled to the wood board 10 by surface bonding, and the wood board 10 (10) and a fixing part (30) for coupling the prefabricated concrete (20).

The wood plate material 10 may be made of plate-shaped wood having a predetermined thickness, and is a component for forming a slab in manufacturing a building by a prefab process. The wooden plate material 10 can be made of a plate-like material of a predetermined thickness as one module, and a notch to be described later by manufacturing the wooden plate-like material 10 as a single plate, rather than a plate, in the form of a rod It is also possible to manufacture the wooden board 10 by arranging side by side as a single module.

Next, the prefabricated concrete 20 is a panel made of concrete, and the concrete was poured after all the slabs were installed during the conventional construction, but in the present invention, after the concrete is prepared in advance, it is brought into the construction site It can be made in a prefab method directly constructed in the , and the prefabricated concrete 20 produced in this way is combined with the wood plate material 10 by surface bonding to form a slab. In the case of a general wood slab, its rigidity is weak, so it cannot be used as a large-span slab, and the impact sound blocking performance is low, which causes inter-floor noise. As the flexural rigidity of wood is improved through the slab, the sensitivity to vibration can be lowered, the sound insulation is increased, and the fire resistance performance and durability against moisture are improved.

Next, it may further include a fixing part 30 for coupling the wood plate material 10 and the prefab concrete (20). The fixing part 30 may be of a configuration generally used to mutually couple plate-shaped members such as screws, and a fixing part ( 30) can be combined to produce one wooden slab module.

According to a preferred feature of the present invention, a plurality of notches 11 are formed through one surface of the wood board 10 by a predetermined depth, and are uniformly disposed with respect to the entire area of the wood board 10, further comprising characterized in that

The notch 11 is a hole formed by a predetermined depth on one surface of the plate-shaped wooden plate 10, and a plurality of notches 11 uniformly arranged with a certain rule over the entire area may be formed. It is preferable not to be formed through penetration, but only to a certain depth.

According to a preferred feature of the present invention, the wood slab 10 has a structure in which a plurality of wood modules are stacked, and the plurality of notches 11 are formed in the wood module installed at the outermost side among the wood modules. do it with

As described above, in manufacturing the wood slab 10, it may be made of a single plate, or it may have a structure in which a plurality of plates are laminated. Here, when a plurality of wood modules are stacked to form one wood slab 10 , the aforementioned notch 11 is formed in the wood module installed on the outermost side, and one wood module is formed on one surface of the wood slab 10 . It is made by forming a notch with a depth corresponding to the thickness.

According to a preferred feature of the present invention, it is formed to protrude from one surface of the prefabricated concrete 20 and has a diameter corresponding to the notch 11 so as to be inserted into the notch 11 formed in the wood plate material 10. It is characterized in that it further comprises a protrusion (21).

A protrusion 21 is formed on one surface of the prefabricated concrete 20 by being inserted into the notch formed in the wooden plate 10 and for coupling the prefab concrete 20 to the wooden plate 10 in a block coupling method. can be The protrusion 21 is formed to correspond to a position where a plurality of notches 11 are uniformly arranged, so that they are mutually fitted.

In addition, according to a preferred feature of the present invention, the fixing part 30 is coupled and fixed by extending from the other surface of the prefabricated concrete 20 to the notch 11 through the protrusion 21 . The screw-shaped fixing part 30 penetrates the prefab concrete 20 and extends to the notch 11 of the wood plate material 10 and is combined to form a single wood slab, which is installed at the site during prefab construction. It is joined between the installed walls.

With respect to the wood slab according to an embodiment of the present invention, the wood slab in which the wood plate material 10 and the prefab concrete 20 are combined with the bending strength of wood, the compressive strength of concrete, and the shear performance of a single notch joint will support The possible vertical load was calculated.

[First embodiment]

For the notch 11 formed in the wood board 10, shear performance was evaluated for two types of notch joints. Table 1 below shows an embodiment of the drawing in which the notch 11 is processed in the wood board 10 .

Ø100mm(diameter)×20mm(depth) Ø200mm (diameter)×20mm (depth)

)에 기울기(α)를 반영하여 식(1)로 계산할 수 있으며, Slip modulus(k)는 식(2)와 같이 최대하중의 10%와 40%하중과 이때의 변위로 계산할 수 있다.Table 1 shows a method for evaluating shear performance after pouring concrete into notched wood. Shear resistance ( R ) is the measured maximum load (

) can be calculated by reflecting the slope (α) in Equation (1), and the slip modulus ( k ) can be calculated as 10% and 40% of the maximum load and displacement at this time as in Equation (2).

················(1)

················(One)

here,

R: shear resistance (N)

: 최대하중(N),

: Maximum load (N),

α: slope

················(2)

················(2)

here,

k : slip modulus (N/m),

:최대하중의 40% 하중(N),

: 40% of the maximum load (N),

:최대하중의 10% 하중(N),

: 10% of the maximum load (N),

:최대하중의 40% 하중에서의 변위(mm),

: Displacement at 40% of the maximum load (mm),

:최대하중의 10% 하중에서의 변위(mm),

: Displacement at 10% of the maximum load (mm),

indicates

Experimental method experiment photo

Ø100mm(diameter)×20mm(depth) fracture shape of specimen Load-displacement curve of Ø100mm (diameter) × 20mm (depth) specimen

Ø200mm (diameter) × 20mm (depth) fracture shape of the specimen Load-displacement curve of Ø200mm (diameter) × 20mm (depth) specimen

Table 2 shows the fracture shape and load-displacement curve of the notch joint. For the Ø100mm (diameter)×20mm (depth) specimen, shear failure of concrete occurred, and the maximum load was 16.5kN (5% lower limit) and the slip modulus was 50,8kN/m (average value). In the case of Ø200mm (diameter) × 20mm (depth) specimen, shear failure of concrete occurred, and the design value was 59.6kN (5% lower limit) and 75.7kN/m (average value) for the maximum load.

[Second embodiment]

The design details of the wood slab in which the wood plate material 10 and the prefabricated concrete 20 are combined are shown. The flexural stiffness of the present invention (hybrid wood slab) can be calculated by Equation (3).

················(3)

………………………………………………………………………………………………

here,

: 하이브리드 목재슬라브의 유효 휨강성 (N·mm²)

: Effective flexural stiffness of hybrid wood slab (N mm ² )

: i번째 층의 휨탄성계수 (MPa)

: Modulus of flexural elasticity of the i-th layer (MPa)

: i번째 층의 단면2차모멘트 (mm⁴)

: Secondary moment of section of the ith layer (mm ⁴ )

: i번째 층의

: of the ith layer

: i번째 층의 단면적 (mm²)

: Cross-sectional area of ith layer (mm ² )

: 중립축과 i번째 층 도심 사이 간격 (mm)

: Distance between the neutral axis and the center of the i-th layer (mm)

The bending moment resistance performance of the present invention (hybrid wood slab) can be calculated by Equation (4), Equation (5), and Equation (6) according to the failure mode. Equation (4) is the flexural failure of wood, Equation (5) is the compression failure of the concrete on the compression side, and Equation (6) is the bending moment resistance performance determined by the shear failure of the concrete at the notch joint. That is, the smallest value among the bending moment resistance performance calculated by Equation (4), Equation (5), and Equation (6) is determined as the design value.

···············(4)

···············(4)

·············(5)

...(5)

·········(6)

...(6)

here,

: 목재의 휨강도로 예측한 하이브리드 목재슬라브의 모멘트성능 (N·mm)

: Moment performance of hybrid wood slab predicted by bending strength of wood (N mm)

: 목재의 휨강도 (MPa)

: Flexural strength of wood (MPa)

: 하이브리드 목재슬라브의 유효단면계수 (mm³)

: Effective section modulus of hybrid wood slab (mm ³ )

: 콘크리트 압축강도로 예측한 하이브리드 목재슬라브의 모멘트성능 (N·mm)

: Moment performance of hybrid wood slab predicted by concrete compressive strength (N mm)

: 콘크리트의 압축강도 (MPa)

: Compressive strength of concrete (MPa)

: 노치접합부의 콘크리트 전단파괴(전단강도)로 예측한 하이브리드 목재슬라브의 모멘트성능 (N·mm)

: Moment performance (N mm) of hybrid wood slab predicted by shear failure (shear strength) of concrete at the notch joint

: 콘크리트의 전단강도 (MPa)

: Shear strength of concrete (MPa)

: 하이브리드 목재슬라브의 유효전단 상수

: Effective shear constant of hybrid wood slab

: 집중하중에서 시험편 지지점과 하중지점 사이의 거리(mm)

: Distance (mm) between the specimen support point and the load point under concentrated load

Notched (Ψ100mmХ20mm) Bending performance evaluation method

Shear fracture of concrete at notch joint wood warping

Flexural Stiffness Experimental Values and Predicted Values Bending Moment Resistance Performance Experimental Values and Predicted Values

Table 3 shows a comparison of the bending performance (flexural stiffness, bending moment) experiment, fracture shape, experimental value and predicted value of a hybrid wood slab manufactured with a Ø100mm (diameter) × 20mm (depth) notch. In the case of flexural stiffness, the experimental average value was 0.34×10 ¹² N·mm ² , and the flexural stiffness predicted by Equation (3) was 0.339×10 ¹² N·mm ² , which was similar to the experimental value and predicted value. The experimental average value of bending moment resistance performance was 9.04 kN·m, and the 5% lower limit was 4.59 kN·m. m was That is, the actual experimental value (5% lower limit) was higher than the predicted value predicted by the design value of the notch joint, which means that the hybrid wood slab can be designed safely.

Although preferred embodiments of the present invention have been described with reference to the accompanying drawings, the embodiments described in the present specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention and represent all of the technical spirit of the present invention. Therefore, it should be understood that there may be various equivalents and modifications that can be substituted for them at the time of filing the present application. Therefore, the embodiments described above are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the following claims rather than the detailed description, and the meaning and scope of the claims and their All changes or modifications derived from the concept of equivalents should be construed as being included in the scope of the present invention.

10: wood board
11: Notch
20: prefabricated concrete
21: protrusion
30: fixed part

Claims (5)

Wood board having a predetermined thickness;
prefabricated concrete combined with the wood planar material by face-to-face bonding;
a fixing part for coupling the wood plate material and the prefab concrete;
A wooden slab comprising a. The method of claim 1,
The wood slab further comprising a plurality of notches formed through one surface of the wood board by a predetermined depth and uniformly disposed with respect to the entire area of the wood board. 3. The method of claim 2,
The wood slab has a structure in which a plurality of wood modules are stacked,
Wood slab, characterized in that the plurality of notches are formed in the wood module installed at the outermost of the wood module. 3. The method of claim 2,
The wood slab is formed to protrude from one surface of the prefabricated concrete, and further comprises a protrusion having a diameter corresponding to the notch so as to be inserted into the notch formed in the wood plate material. 5. The method of claim 4,
The fixing part extends from the other surface of the prefab concrete through the protrusion to the notch and is coupled and fixed.

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