KR20160028425A - Manufacturing method of repair/reinforcement structure for wood structure using FRP bar and wood - Google Patents

Abstract

Disclosed is a method for manufacturing a repair/reinforcement structure for a wooden structure using FRP bars and timber. The method includes: a timber provision step (S110, S210) of providing timber; a rough groove formation step (S120, S220) of forming at least one rough groove (101) on the surface of the timber by using a grinder with an irregular blade surface; an FRP bar embedment step (S130, S230) of embedding an FRP bar with circular or rectangular cross-section inside the rough groove (101); and a finishing treatment step (S140, S240) of filling the rough groove (101) and empty space with an epoxy resin. According to the present invention, the original form of a wooden structure can be maintained, and the strength of timber used to build the wooden structure can be improved at the same time.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a repair / reinforcement structure for a wooden building using a FRP bar and a wood material,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a repair and reinforcement method, and more particularly, to a method of manufacturing a repair / reinforcement structure for a wooden building using FRP bar and wood material.

The strength of wood, which is the main constituent material of wooden building materials, varies greatly according to the natural environment in which the wood is grown and the species and processing method. Also, the characteristics of the wood used depend on the exposed environment of the building, Change.

A survey of the preference of the residential structure for the single-family householders shows that the preference for the wooden house is 70 ~ 80%, which is overwhelmingly superior to that of the reinforced concrete house. Since 2005, the roof height of 18m or less in our country, under the eaves height of 15m, building total floor area of buildings are more than 3000m ² with the regulations amended to allow construction to pure wooden bar.

In other words, wooden buildings of three stories or less can be legally constructed. It has been approved as a fire-resistant structure for inter-generational walls of wooden houses, and has opened a way to build even apartment houses. In fact, in the suburban housing market, wooden houses account for more than 75% of the total housing supply.

The reason for this is due to the eco-friendly nature of wooden houses. Most of all, timber is used as building material as it is collected from nature, and engineering wood with improved performance as a structural material has been used through technological progress. In engineering wood, more than 90% of physical properties are made of pure wood, It has the advantage of not releasing harmful substances such as syndrome. Domestic demand for timber is expected to increase steadily due to interest in timber as an eco-friendly material, expansion of cogeneration facilities, and expansion of Hanok architecture. However, the rise in imports of timber will slow down due to the rise in overseas timber prices and the aftermath of the earthquake.

The Forest Service has announced that it will achieve a 20% timber self-sufficiency rate by 2016 in accordance with the five-year plan for the Promotion of Wood Industry announced in 2014.

However, it is difficult to cope with the problem of timber supply and demand due to the forest development regulation under the United Nations Conference on Environment and Development (UNCED). It is urgent to develop eco-friendly repair and rehabilitation methods for old wooden buildings and it is necessary to develop innovative technology without consuming wood and deforming the external shape of buildings.

Accordingly, the present invention proposes a repair and rebuild method in which a FRP bar is attached to a surface of a wooden building that can be easily applied to a wooden building construction method.

Korean Unexamined Patent Publication No. 10-2009-0064830 (entitled "Reinforcement and Maintenance Method of Damaged High Strength Resisting Member")

SUMMARY OF THE INVENTION The object of the present invention is to provide a FRP bar and wood structure using wood material that can maintain the original shape of the wooden building and increase the strength of the wood material and can be easily applied to the damaged wooden building during repair / And to provide a method for manufacturing a repair / reinforcement structure.

It is another object of the present invention to provide a method of manufacturing a repair / reinforcement structure for a wooden building using FRP bars and wood materials that can maintain the original shape of a building when repairing / reinforcing the wooden building by easily replacing the damaged part.

According to an aspect of the present invention, there is provided a method of manufacturing a repair / reinforcement structure for a wooden building using FRP bars and wood materials, the method comprising: A wood material providing step S210 for providing a wood material; A coarse groove creating step (S220) of creating at least one coarse groove of a quadrangle on the surface of the wood material by using a grinder having an irregular surface edge; An FRP bar embedding step (S230) of embedding an FRP bar having a circular section in each of the at least one coarse groove; And a step (S240) of finishing the hollow space between the coarse groove and the FRP bar with epoxy resin after embedding the FRP bar in the coarse groove, wherein the rough groove forming step (S220) At least one or more rough grooves are formed on the upper and both side surfaces of the wood material, the surface roughness of which is irregularly formed in accordance with the surface area of the wood material; In the FRP barging step (S230), the FRP bar is replaced so as to be replaceable; The FRP bars are manufactured by mixing at least one of carbon fibers and glass fibers, and are provided with irregularly arranged grooves on the surface thereof, thereby improving the contact force with the epoxy resin in the rough grooves in which the irregular surface is formed .

According to the present invention, there is provided a method of manufacturing a repair / reinforcement structure for a wooden building using FRP bar and wood material, wherein the wood material comprises cedar, fir, spruce, cedar, larch, Chrysanthemum, chestnut, zelkova, oak, and royal apophotos.

According to an aspect of the present invention, there is provided a repair / reinforcement structure for a wooden building using FRP bar and wood material, the wood structure having a long-term permissible stress (MPa) of 1/7 to 1/8 of breaking strength; A rectangular coarse groove formed on the wood material with irregular surface using a grinder having an irregular surface blade; And an FRP bar having a plurality of grooves randomly arranged to increase the contact surface area; Wherein at least one of the coarse grooves is formed on an upper surface and a side surface of the wood material in accordance with the surface area of the wood material; Inserting the FRP bars into the respective coarse grooves and then fixing them to the wood material by epoxy resin in the coarse grooves; Wherein the FRP bar is manufactured by mixing at least one of carbon fiber and glass fiber; Further filling the hollow space between the coarse groove and the FRP bar with the epoxy resin to perform a finishing process; And the FRP bars are embedded in the coarse grooves so as to be replaceable.

In the repair / reinforcement structure for wooden building using the FRP bar and wood material according to the present invention, the wood material is selected from the group consisting of cedar, fir, spruce, cedar, larch, fir, spruce, , Chestnut, zelkova, oak, and royal apophotos.

According to the present invention, it is possible to maintain the original shape of the building through the FRP bars embedded in the wood, and it has an advantage that the strength of the wood can be increased.

It is also advantageous in that it can be easily applied to damaged timber structures during maintenance / reinforcement, and has an advantage that it can be applied to the timber of newly constructed timber to reduce the cross section of timber.

In addition, by simply replacing the damaged portion, it is possible to maintain the original shape of the building during maintenance / reinforcement of the wooden building.

These benefits provide the environmental protection and economic value added by forest resource protection.

1 is an exploded perspective view of a repair / reinforcement structure for a wooden building using FRP bars and wood materials according to an embodiment of the present invention.
2 is an exploded perspective view of a repair / reinforcement structure for a wooden building using FRP bars and wood material according to another embodiment of the present invention.
3 is a flowchart illustrating a method of manufacturing a repair / reinforcement structure for a wooden building shown in FIG.
4 is a flowchart illustrating a method of manufacturing a repair / reinforcement structure for a wooden building shown in FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a detailed description of preferred embodiments of the present invention will be given with reference to the accompanying drawings. In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

Embodiments in accordance with the concepts of the present invention can make various changes and have various forms, so that specific embodiments are illustrated in the drawings and described in detail in this specification or application. It is to be understood, however, that it is not intended to limit the embodiments according to the concepts of the present invention to the particular forms of disclosure, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between. Other expressions that describe the relationship between components, such as "between" and "between" or "neighboring to" and "directly adjacent to" should be interpreted as well.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises ", or" having ", or the like, specify that there is a stated feature, number, step, operation, , Steps, operations, components, parts, or combinations thereof, as a matter of principle.

Hereinafter, a method for manufacturing a repair / reinforcement structure for a wooden building using FRP bar and wood material according to an embodiment of the present invention and a repair / reinforcement structure for a wooden building manufactured using the FRP bar and wood material will be described in detail with reference to the drawings.

FIG. 1 is an exploded perspective view of a repair / reinforcement structure for a wooden building using a FRP bar and wood material according to an embodiment of the present invention. FIG. 2 is a perspective view illustrating a FRP bar according to another embodiment of the present invention. FIG. 3 is a flow chart showing a method for manufacturing a repair / reinforcement structure for a wooden building shown in FIG. 1, and FIG. 4 is a view for explaining a method for manufacturing a repair / Fig.

As shown in FIGS. 1 to 4, a method of manufacturing a repair / reinforcement structure for a wooden building using FRP bars and wood material according to an exemplary embodiment of the present invention includes steps of providing a wood material (S110, S210) (Step S120, step S220), embedding the FRP (steps S130 and S230), and finishing processing steps (steps S140 and S240).

The wood material providing step (S110, S210) may be a step of providing wood material.

Here, the wood material used in the present invention is a wood material having excellent compression, tensile (warp) and shear, and a long-term permissible stress (MPa) is a wood material having 1/7 to 1/8 of the breaking strength. But are not limited to, cedar, fir, spruce, cedar, larch, pinewood, spruce, blacklion, larch, falcon, fir, duck, chestnut, zelkova, oak tree,

The coarse grooving step (S120, S220) may be a step of creating at least one coarse groove (101) on the surface of the wood material by using a grinder with irregular surface blades.

The rough groove 101 preferably has a rectangular cross section as shown in FIGS.

Here, the coarse groove forming step (S120, S220) may be a step of creating at least one rough groove (101) according to the surface area of the wood material.

The FRP barging step (S130, S230) may be a step of embedding a round or square FRP bar 200 in the rough groove (101). It is preferable that the FRP bars are replaced so as to be replaceable in the coarse grooves 101 so that the original shape of the building can be maintained at the time of repair / reinforcement of the wooden building by easily replacing the damaged portions.

Here, the FRP bars may be provided with grooves having irregularly arranged surfaces in order to improve contact force with the epoxy resin. The FRP bar 200 may be manufactured by mixing at least one of carbon fiber and glass fiber.

The finishing step (S140, S240) may be a step of filling an empty space in the rough groove (101) with an epoxy resin.

Hereinafter, a repair / reinforcement structure for a wooden building manufactured using a method of manufacturing a repair / reinforcement structure for a wooden building using FRP bars and wood materials according to an embodiment of the present invention will be described.

1 and 2, a repair / reinforcement structure 100, 500 for a wooden building according to an embodiment of the present invention includes a wood material, a rough groove 101, an FRP bar 200, and an epoxy resin do.

At least one of the coarse grooves 101 is formed on one side of the wood material, and the number of the coarse grooves 101 may vary depending on the size of the wood material. The coarse grooves are irregularly formed on the surface using a grinder having irregular surface blades.

The FRP bar 200 is provided in the coarse groove 101 together with the epoxy resin, and the FRP bar 200 may have a circular or rectangular cross-section. In addition, irregularly arranged grooves may be provided on the surface in order to improve contact force with the epoxy resin.

Hereinafter, an experimental example for evaluating the stiffness of a repair / reinforcement structure for a wooden building and a general wood block according to an embodiment of the present invention will be described.

Table 1 shows the experimental results showing the relationship between the elastic modulus and the fracture modulus of the repair / reinforcement structure and the general wood reinforcement for wooden buildings.

[Table 1]

Referring to Table 1, the fracture modulus and elastic modulus of the repair / reinforcement structure A and the general wood blockability agent B according to the embodiment of the present invention are shown in Table 1. The repair / A) showed about 3 times higher rigidity than general wood material (B).

Here, the general wood material (B) is a wood having a span of 214 cm, and the wood structure repair / reinforcement structure (A) is a structure obtained by inserting an FRP bar on the surface of a general wood material (B) .

Therefore, according to the present invention, it is possible to maintain the original shape of the building through the FRP bars embedded in the wood, to increase the strength of the wood, and to easily apply it to the damaged wooden building during repair / It is possible to apply the present invention to timber of newly constructed buildings to provide an advantage of reducing the cross section of the timber and to easily replace only the damaged part to provide an advantage that the original shape of the building can be maintained when repairing / . These benefits can provide environmental protection and economic added value by protecting forest resources.

Although the present invention has been described in connection with the specific embodiments of the present invention, it is to be understood that the present invention is not limited thereto. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents. Various modifications and variations are possible.

100, 500: repair / reinforcement structure for wooden buildings
101: rough groove 200: FRP bar
S110, S210: Wood material providing step S120, S220: rough groove forming step
S130, S230: FRP barging step S140, S240: Finishing step

Claims (4)

Providing a wood material having a long-term allowable stress (MPa) of 1/7 to 1/8 of a breaking strength (S210);
A coarse groove creating step (S220) of creating at least one coarse groove of a quadrangle on the surface of the wood material by using a grinder having an irregular surface edge;
An FRP bar embedding step (S230) of embedding an FRP bar having a circular section in each of the at least one coarse groove; And
(S240) finishing the hollow space between the coarse groove and the FRP bar with epoxy resin after the FRP bar is embedded in the coarse groove,
The coarse groove creation step (S220)
At least one or more coarse grooves having irregular surfaces are formed on the top and both side surfaces of the wood material according to the surface area of the wood material,
In the FRP barging step (S230), the FRP bar is replaced so as to be replaceable,
The FRP bars may be formed by,
Wherein at least one of the carbon fiber and the glass fiber is mixed and the groove is irregularly arranged on the surface thereof so that the contact force with the epoxy resin can be improved in the rough groove in which the surface is irregularly formed A method for manufacturing a repair / reinforcement structure for a wooden building using FRP bar and wood material. The method according to claim 1,
Characterized in that the wood material is selected from cedar, fir, spruce, cedar, larch, fir, spruce, black pine, larch, Hempen, fir, pine, chestnut, zelkova, oak, Method of manufacturing repair / reinforcement structure for wooden building using FRP bar and wood material. Long-term permissible stress (MPa) is 1/7 to 1/8 of the breaking strength,
A rectangular rough groove whose surface is irregularly formed on the wood material by using an irregular surface blade, and
A FRP bar having a plurality of irregularly arranged grooves for increasing the contact surface area,
Wherein at least one of the coarse grooves is formed on an upper surface and a side surface of the wood material in accordance with the surface area of the wood material,
Inserting the FRP bars into the respective coarse grooves and then fixing them to the wood material by epoxy resin in the coarse grooves,
The FRP bar is manufactured by mixing at least one of a carbon fiber and a glass fiber,
And the void space between the coarse groove and the FRP bar is further filled with the epoxy resin,
Wherein the FRP bars are interchangeably embedded in the coarse grooves. ≪ RTI ID = 0.0 > 18. < / RTI > The method of claim 3,
Characterized in that the wood material is selected from cedar, fir, spruce, cedar, larch, fir, spruce, black pine, larch, Hempen, fir, pine, chestnut, zelkova, oak, Repair / reinforcement structure for wooden buildings using FRP bar and wood material.

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