KR20170014138A - Construction Method for Earthquake-proof of Structure - Google Patents

Construction Method for Earthquake-proof of Structure Download PDF

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Publication number
KR20170014138A
KR20170014138A KR1020150106998A KR20150106998A KR20170014138A KR 20170014138 A KR20170014138 A KR 20170014138A KR 1020150106998 A KR1020150106998 A KR 1020150106998A KR 20150106998 A KR20150106998 A KR 20150106998A KR 20170014138 A KR20170014138 A KR 20170014138A
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South Korea
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layer
reinforcing layer
forming
reinforcing
reinforcement
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KR1020150106998A
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Korean (ko)
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KR101746933B1 (en
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김대중
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주식회사 제이투이앤씨
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/92—Protection against other undesired influences or dangers
    • E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00—Working measures on existing buildings
    • E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
    • E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
    • E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground

Abstract

The present invention relates to an earthquake-resistant reinforcement construction method for a structure. The earthquake-resistant reinforcement construction method is for executing a painting operation on the surface of a structure which can be a beam, column, or slab to enhance the earthquake resistance performance of the structure. The earthquake-resistant reinforcement construction method includes: a first process of coating a first reinforcement material, which is prepared by mixing polymer cement concrete (PCC) and super-fibers at the weight ratio of 100:0.8 to 100:1.2, on a surface of the structure to form a first reinforcement layer; a second process of coating a second reinforcement material, which is prepared by mixing an epoxy putty and super-fibers at the weight ratio of 100:0.8 to 100:12, on the surface of the first reinforcement layer to form a second reinforcement layer; a third process of coating a third reinforcement material, which is prepared by mixing the epoxy putty and super-fibers at the weight ratio of 100:0.8 to 100:12, on the surface of the second reinforcement layer to form a third reinforcement layer; and a fourth process of coating a polyurea resin on the surface of the third reinforcement surface to form a top layer.

Description

Technical Field [0001] The present invention relates to an earthquake-

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an earthquake-proof reinforcement construction method of a structure, and more particularly, to a seismic reinforcement construction method of a structure capable of improving seismic performance of a structure by painting on a structure surface such as a beam, a pillar, .

Generally, when an earthquake occurs, all structures placed on the ground move with the ground. If the ground is shaken, the inertial structure is shaken, and the columns, beams, shear walls or braces constituting the structure are affected by earthquakes in the form of axial force, shear force, and bending moment.

Recently, seismic design has been applied to prevent the collapse or destruction of concrete structures and reinforced concrete structures due to earthquakes during construction.

As an example of a method for improving the seismic performance of such a structure, Registration No. 10-0894492 has been proposed. The present invention relates to a method for reinforcing concrete reinforced concrete structures using an aramid strip member, the method comprising the steps of: (a) forming a cutting line at a depth greater than the deteriorated depth of the aramid strip member so as to include a deteriorated concrete region of the reinforced concrete structure; (B) removing the deteriorated concrete on the inside of the cutting line; (c) washing the surface of the recessed portion formed by removing the concrete deteriorated in the step (b); (d) (E) applying an epoxy resin to the aramid strip member having a width smaller than that of the recessed portion, and then attaching the epoxy resin on the high strength aqueous acrylic polymer mortar; (c) attaching the aramid strip member to the aramid strip member; f) an epoxy resin is caulked between both end portions of the aramid strip member and the recessed portion, It includes the steps:

However, in the case of the registered patent, since the surface of the structure is cut by an operator to form a recess, the work takes a long time and the width of the recess is required to be constant so that the aramid strip can be attached, . In other words, in the case of unskilled persons, it is difficult to carry out a series of works to reinforce the structure.

Further, when the corner or the surface of the structure is not uniform, it is difficult to form the concave portion, so that there is a difficulty in the construction and there is also a problem that the shape of the structure is considerably restricted.

Patent No. 10-0894492

Accordingly, it is an object of the present invention to provide a structure for reinforcing a seismic performance of a structure, in which a separate groove for fixing a stiffener to a surface of a structure is not formed or a reinforcing member is not required to be tailored, And an object of the present invention is to provide a seismic-strengthening construction method of a structure capable of easily carrying out earthquake-resistant construction.

It is another object of the present invention to provide a seismic isolation structure capable of uniformly performing overall reinforcement on the surface of a structure regardless of the shape of the structure during an earthquake-proofing operation and capable of enhancing the strength, elongation and hardness of the structure, And to provide a reinforcing construction method.

In order to solve such a technical problem,

A first step of forming a first reinforcing layer by applying a first reinforcing material obtained by mixing polymer cement concrete (PCC) and super fibers at a weight ratio of 100: 0.8 to 100: 1.2 to the surface of the structure; A second step of forming a secondary reinforcing layer by applying a secondary reinforcing material obtained by mixing an epoxy putty and super fibers in a weight ratio of 100: 0.8 to 100: 1.2 to the surface of the primary reinforcing layer; A third step of forming a third reinforcing layer by applying a third reinforcing material obtained by mixing an epoxy putty and super fibers in a weight ratio of 100: 0.8 to 100: 1.2 to the surface of the second reinforcing layer; And a fourth step of applying a polyurea resin to the surface of the third reinforcing layer to form a top layer.

The method may further include a fifth step of forming an undercoating layer by coating an epoxy on the surface of the first reinforcing layer to improve a bonding force in forming the reinforcing layer before the second step after the first step .

And a sixth step of forming an adhesive layer 22 by filling or coating an aramid fiber or carbon fiber on the surface of the secondary reinforcing layer before the third step after the second step .

And a seventh step of forming a primer layer by applying an epoxy primer to improve the adhesion strength of the upper layer on the surface of the tertiary reinforcing layer 30 before the fourth step after the third step .

According to the present invention, superfine fibers are mixed with polymer cement concrete (PCC) and epoxy putty at a weight ratio of 100: 0.8 to 100: 1.2 to improve seismic performance of structures such as beams, columns, By performing the seismic reinforcement by applying the car or the third stiffener, it is possible to easily perform the cracking and seismic reinforcement work of the structure by the unskilled person.

In addition, the present invention can be applied widely to various structures because it can perform seismic reinforcement without being affected by the surface shape of the structure by mainly applying paint method for anti-seismic reinforcement. In addition, There is an advantage that a difficult area can be easily constructed.

1 is a view showing a seismic reinforcement construction process of a structure according to the present invention.
FIG. 2 is a sectional view of an earthquake-proofing construction of a structure according to the present invention.

The features of the present invention will be apparent from the following detailed description of the preferred embodiments of the present invention with reference to the accompanying drawings. FIG. 1 is a view showing a seismic reinforcement construction process of a structure according to the present invention, and FIG. 2 is a sectional view of an earthquake-proof reinforcement structure according to the present invention.

Referring to FIGS. 1 and 2, an earthquake-proofing method for a structure according to the present invention includes a surface treatment step (S100) for removing contaminants on the surface of a structure (1) such as a concrete beam, column, slab, (S110) for forming a first reinforcing layer (10) by applying a first reinforcing material obtained by mixing polymer cement concrete (PCC) and super fibers at a predetermined ratio on the surface of the first reinforcing layer (1) (S120) for forming a secondary reinforcing layer (20) by applying a secondary reinforcing material obtained by mixing an epoxy putty and super fibers at a predetermined ratio on the surface of the secondary reinforcing layer (20) (S130) forming a third reinforcing layer (30) by applying a third reinforcing material obtained by mixing an epoxy putty and super fibers at a certain ratio, and a step of forming a third reinforcing layer (30) by applying a polyurea resin to the surface of the third reinforcing layer And a top layer forming step (S140) for forming the top coat layer 40 It is sex.

In order to improve the bonding force when the secondary reinforcement layer 20 is formed, the surface of the primary reinforcement layer 10 is coated with epoxy to form the undercoat layer 12 after the primary reinforcement layer forming process (S110) It is preferable to further perform the layer forming step (S112).

A primer layer forming step (S132) in which an epoxy primer is applied to improve the adhesion strength of the upper layer 40 is formed on the surface of the tertiary layer 30 to form a primer layer 32 Do.

Of course, the primary to tertiary reinforcing materials are used for strength improvement and seismic strengthening, and it is a matter of course that the mixing ratio of each component can be adjusted in various ratios depending on the use of the structure 1 and the seismic reinforcement working environment.

The polymer cement concrete (PCC) is a cement-based composite material which is mixed with a small amount of a water-soluble or dispersing polymer to improve its performance or change its properties. Depending on the polymer used, Thereby accelerating the curing. It can be applied to bridge overlay, flooring plaster, etc. which require characteristics of adhesion and durability.

The super fiber is usually used as a curing crack control reinforcement for use in concrete mortar and reinforcing steel construction reinforcing steel. This is because it has a large quantity per unit, maximizes the effect, controls curing cracks, drying shrinkage and temperature cracking, It is heavier and does not float on the surface. Supermicro fiber has excellent chemical resistance and durability, high abrasion resistance, impact resistance and anti-seismic resistance.

Especially, super micro fiber has excellent ability to control curing cracks and shrinkage cracks, increase wear resistance, and has high chemical resistance and durability. It is excellent in crack prevention and floor stopper such as slope and vertical surface due to increase in adhesiveness, When used as a floor finishing material, it has excellent cracking, phenol, tensile strength and expansion / contraction ratio due to increased bonding strength.

On the other hand, the epoxy putty (paddy) is used for crushing and reinforcing cracks and grooved parts on the surface of the structure, and mixing the main body and the curing agent in a weight ratio of, for example, 1: 1 use.

In addition, the epoxy primer is applied evenly using a brush, a brush or the like so that the epoxy primer does not aggregate at one place when it is applied. In this case, the epoxy primer is mixed with the main component and the hardener in a weight ratio of 1: 1, for example.

The polyurea resin is a reaction product of an isocyanate and a polyetheramine having a primary amine at a terminal, and can be made into an elastic coating film (spray elastic body) by a commercial high pressure, high temperature impact mixing spray machine. It uses polyetheramine as a raw material and is 100% solids with no volatile matter. This polyurea resin is a non-catalyzed fast cure type, and when used for waterproof treatment, it has a gel time within 3 ~ 5 seconds after spraying, so it can be sprayed without slipping on slope and vertical surface. Seconds. It is hardly affected by water and temperature during construction, and is less affected by climate change, moisture, heat, and cold.

And the polyurea resin has excellent adhesion to various adherends. By using the quick reactivity of these resins, it is possible to produce an elastic body having excellent adhesion. Factors influencing the adhesion of polyurea resins include the surface conditions of the substrate (treatment), the prescription technology of the resin and its reactivity, and these factors should be consulted when constructing.

Hereinafter, the seismic reinforcement construction process of the structure according to the present invention will be described in detail with reference to FIGS. 1 and 2. FIG.

(S100) Surface treatment process

First, it completely removes contaminants such as LAITANCE, dust and oil on the surface of structures (1) such as beams, columns, slabs, etc. that need to be subjected to seismic reinforcement.

The surface treatment may be performed by surface treatment through blasting, chipping, diamond wheel grinding, or the like to remove contaminants.

(S110) First reinforcing layer forming step

After the surface treatment of the structure 1 is carried out through the above step S100, the surface of the structure 1 is treated with a polymeric cement concrete (PCC) and superfibers in a weight ratio of, for example, 100: The primary reinforcing layer 10 is formed by applying a reinforcing material.

At this time, the primary reinforcing material mixes the polymer cement concrete (PCC) and the super fiber at a weight ratio of 100: 0.8-100: 1.2. In this case, it is preferable to mix polymer cement concrete (PCC) and super fibers at a weight ratio of 100: 1.

The thickness of the primary reinforcing layer 10 is preferably 0.5 to 2 mm, for example, and it may be formed in various thicknesses as required. Particularly, the primary reinforcing layer 10 can be partially or entirely formed on the surface of a structure requiring seismic strengthening.

Such a primary reinforcing material contains superfine fibers, thereby suppressing the occurrence of pinholes when applied to the surface of the structure 1, and is advantageous for reinforcing the strength of the structure 1. [

(S112) Substrate layer forming step

After the primary reinforcing layer 10 is formed through the above step S110, epoxy is coated on the surface of the primary reinforcing layer 10 to improve the adhesion strength, that is, the bonding strength when forming the secondary reinforcing layer 20 described later Thereby further forming the undercoat layer 12. Of course, the thickness of the undercoating layer 12 may be, for example, 50 mu m, and may be formed to various thicknesses depending on the working environment or need.

(S120) Second reinforcing layer forming step

After forming the primary reinforcing layer 10 or the undercoat layer 12 by performing the above-described step S110 or S112, the epoxy putty and the super fibers are mixed in a weight ratio of, for example, 100: 1 The second reinforcing layer 20 is formed by applying the second reinforcing material in a mixed state.

At this time, the secondary stiffener mixes the epoxy putty and the super fiber at a weight ratio of 100: 0.8 to 100: 1.2. In this case, it is preferable to mix the epoxy putty and the super fibers in a weight ratio of 100: 1.

Also, the thickness of the secondary reinforcing layer 20 is preferably 1 to 2 mm, for example, and it may be formed to have various thicknesses as required. In particular, the secondary reinforcing layer 20 can be formed entirely on the portion where the primary reinforcing layer 10 is formed.

(S122) The adhesive layer forming step

A aramid fiber or carbon fiber is filled or coated on the surface of the secondary reinforcing layer 20 after the secondary reinforcing layer 20 composed of the epoxy putty and the super fibers is formed through the step S112, The adhesive layer 22 can be formed and the adhesive force can be doubled.

(S130) Third Stiffening Layer Forming Process

After the adhesive layer 22 is formed by performing the above-mentioned process (S122), a third stiffener in a state where the epoxy putty and the super fibers are mixed at a weight ratio of, for example, 100: 1 is applied for cracking and seismic reinforcement, A reinforcing layer 30 is formed.

At this time, the third stiffener mixes the epoxy putty and the super fibers at a weight ratio of 100: 0.8-100: 1.2. In this case, it is preferable to mix the epoxy putty and the super fibers in a weight ratio of 100: 1.

In addition, the thickness of the third reinforcing layer 30 is preferably 1 to 2 mm, for example. In particular, the third reinforcing layer 30 can be formed entirely on the portion where the second reinforcing layer 20 is formed.

Such a tertiary reinforcing material contains superfine fibers, thereby suppressing the occurrence of pinholes when applied to the surface of the structure 1, and is advantageous in reinforcing the strength of the structure 1.

Of course, it is effective to use the same material as that of the secondary stiffener mentioned above, but it can be applied variously by adjusting the ratio of these components or by containing additional components.

(S132) Step of forming a primer layer

The primer layer 32 is formed on the surface of the tertiary reinforcing layer 30 formed by performing the step S120 by applying an epoxy primer to improve the adhesion strength of the upper layer 40 to be described later. Which is coated with a spray so as to be sufficiently absorbed on the surface of the secondary reinforcing layer 20. [

In this case, it is preferable that the thickness of the primer layer 32 is 50 탆, for example, and it may be formed in various thicknesses as required and uniformly formed.

Allow to cure for a certain time at room temperature (15 ~ 25 ℃). In this case, it is preferable that the curing temperature of the undercoat layer 20 is natural cured for at least 2 hours at 20 캜.

(S140) The upper layer forming step

The top layer 40 is formed by applying a polyurea resin to the surface of the primer layer 32 formed by performing the above step S132. In this case, the polyurea resin and the curing agent can be mixed at various ratios. For example, the polyurea resin and the curing agent may be mixed at a ratio of 7: 1 and sprayed with a spray to form a coating having a thickness of 0.5 mm (500 m).

When the seismic strengthening is performed on the surface of the structure 1 through the above process, the elongation percentage, the hardness and the compressive strength can be remarkably improved as compared with the conventional method, and the work can be easily performed even by the unskilled person .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, Various modifications may be made by those skilled in the art.

1: Structure 10: Primary reinforcing layer
12: undercoat layer 20: secondary reinforcement layer
22: Adhesive layer 30: Third reinforcing layer
32: primer layer 40: upper layer

Claims (4)

A first step of forming a first reinforcing layer 10 by applying a primary reinforcing material obtained by mixing polymer cement concrete (PCC) and super fibers at a weight ratio of 100: 0.8 to 100: 1.2 to the surface of the structure 1;
A second step of forming a secondary reinforcing layer (20) by applying a secondary reinforcing material obtained by mixing an epoxy putty and super fibers in a weight ratio of 100: 0.8 to 100: 1.2 to the surface of the primary reinforcing layer (10);
A third step of forming a third reinforcing layer 30 by applying a third reinforcing material obtained by mixing an epoxy putty and super fibers in a weight ratio of 100: 0.8 to 100: 1.2 to the surface of the second reinforcing layer 20;
And a fourth step of forming a top layer (40) by applying a polyurea resin to the surface of the third reinforcing layer (30).
The method according to claim 1,
A fifth step of forming an undercoating layer 12 by coating an epoxy on the surface of the first reinforcing layer 10 so as to improve the bonding force in forming the reinforcing layer 20 before the second step after the first step The method of claim 1, further comprising: The method according to claim 1,
And a sixth step of forming an adhesive layer 22 by filling or coating an aramid fiber or carbon fiber on the surface of the secondary reinforcing layer 20 before the third step after the second step Wherein said method comprises the steps of:
The method according to claim 1,
(7) forming the primer layer (32) by applying an epoxy primer to improve the adhesion strength of the upper layer (40) to the surface of the tertiary reinforcing layer (30) before the fourth step after the third step The method of claim 1, further comprising:
KR1020150106998A 2015-07-29 2015-07-29 Construction Method for Earthquake-proof of Structure KR101746933B1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200011037A (en) * 2020-01-10 2020-01-31 최우용 Method for reinforcing seismic resistant of building
CN111946091A (en) * 2020-08-26 2020-11-17 华侨大学 Reinforcing method for improving seismic performance of masonry wall
CN112431432A (en) * 2020-11-13 2021-03-02 深圳市海多嘉新建材有限公司 Construction method for solving cracking of splicing seam

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102402714B1 (en) * 2020-06-12 2022-05-26 이기덕 Method for reinforcing multiple coatings inside tunnels by applying polymer elastomer

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100894492B1 (en) 2008-04-23 2009-05-07 (주)희상리인포스 Reinforcing method of ferroconcrete using aramid strip members

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100894492B1 (en) 2008-04-23 2009-05-07 (주)희상리인포스 Reinforcing method of ferroconcrete using aramid strip members

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200011037A (en) * 2020-01-10 2020-01-31 최우용 Method for reinforcing seismic resistant of building
CN111946091A (en) * 2020-08-26 2020-11-17 华侨大学 Reinforcing method for improving seismic performance of masonry wall
CN112431432A (en) * 2020-11-13 2021-03-02 深圳市海多嘉新建材有限公司 Construction method for solving cracking of splicing seam

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