KR20150085654A - Laminated hybrid panel with frp composite and corrugated steel plate for seismic rehabilitation of building structures and producing method thereof and construction method using the same - Google Patents

Abstract

The present invention relates to a corrugated steel plate (100) having a predetermined volume and having corrugated portions (110) formed on front and rear surfaces thereof; And an FRP reinforcing part 200 formed on exposed surfaces of the front and rear corrugated parts 110 so as to have the same structure as the corrugated part 110. The FRP reinforcing part 200 is formed by impregnating a plurality of cloths (FRP) panel for anti-seismic reinforcement, a method of manufacturing the FRP panel, and a construction method using the FRP panel for anti-seismic reinforcement, which are characterized in that the reinforcement member To prevent emergency damage, to prevent secondary damage, to ensure ease of installation, to secure the rigidity of deformation and ductility that is effective for energy absorption, and to secure long-term stability of the structure.

Description

TECHNICAL FIELD [0001] The present invention relates to an FRP panel for an anti-seismic reinforcement, a method of manufacturing the FRP panel, and a construction method using the FRP panel for anti-seismic reinforcement. BACKGROUND ART < RTI ID = 0.0 >

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction and civil engineering field, and more particularly, to an FRP panel for seismic reinforcement, a method of manufacturing the FRP panel, and a construction method using the FRP panel for seismic reinforcement.

Recently, various earthquake activities have been actively carried out in various parts of the world, resulting in many human and property damage.

In Korea, small-scale earthquake phenomena are continuously observed, and it is time to worry about damage to the earthquake.

However, most earthquake-related researches in Korea are to design structures before earthquake damage such as seismic design and seismic design.

Therefore, in case of actual earthquake, damage to the structure is serious, and there are insufficient measures to reinforce it.

That is, the conventional earthquake damage recovery method has the following problems.

In the case of installing earthquake-resistant panels on the walls during the earthquake damage recovery method, the existing materials are reinforced with general construction materials such as bricks and concrete.

The brick has a problem in that it is difficult to perform emergency construction and transportation because the weight of the brick is large, and the concrete is delayed in restoration due to a lot of construction time for curing and curing time.

In addition, the two materials are also brittle materials in terms of materials, and are suddenly destroyed when the load is increased.

Therefore, it is necessary to take measures for quick, effective and continuous reinforcement against secondary earthquakes after earthquake damage.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide an emergency rescue system capable of emergency recovery from damages caused by an earthquake, preventing secondary damage, convenient construction, This paper presents a FRP panel for seismic retrofit for emergency earthquake resurfacing and reinforcement for medium and low-rise building structures, which can secure the long-term stability of the structure by securing all the effective ductility, and the construction method using the FRP panel for seismic reinforcement The purpose of that is to do.

In order to solve the above problems, the present invention provides a corrugated steel plate 100 having a predetermined volume and having corrugated portions 110 formed on front and rear surfaces thereof; And FRP reinforcing parts 200 formed on exposed surfaces of the corrugated parts 110 of the front and rear surfaces to have the same structure as the corrugated part 110. The FRP reinforcing part 200 is formed by impregnating an adhesive (FRP) panel for an earthquake-proof reinforcement characterized by having a structure in which a plurality of stiffeners (210) are attached in a laminated structure.

The reinforcing material 210 is preferably formed by mixing one or more of glass fibers or carbon fibers.

It is preferable that the reinforcing material 210 is any one of a fabric or a mat which is arranged so that the arranging directions of the fibers are orthogonal to each other at regular intervals so that a plurality of lattice types are formed.

The FRP reinforcing part 200 is formed of a plurality of reinforcing materials 210 formed of the orthogonal fibers and the direction of fiber arrangement of the reinforcing material 210a and the laminated stiffener 210b stacked on the front surface or the rear surface of the reinforcing material 210a is transverse And are arranged so as to be orthogonal to each other.

The FRP reinforcing part 200 includes an upper plate 201; A plurality of inclined plates 202 bent downward at both ends of the top plate 201; A lower plate 203 bent horizontally at the ends of the plurality of swash plates 202; Are formed repeatedly in the transverse direction.

The FRP reinforcing part 200 may further include a guide plate 204 bent in a direction perpendicular to the side edges of the top plate 201 and the bottom plate 203.

Preferably, the adhesive includes epoxy.

Preferably, the FRP reinforcing part 200 has a refractory coating on the surface thereof.

According to the present invention, there is provided a method of manufacturing an FRP panel for seismic retrofitting, comprising: a corrugated steel plate manufacturing step of manufacturing the corrugated steel plate; A FRP reinforcing portion forming step of attaching the stiffener 210 of the cloth structure by impregnating the adhesive to the front and rear surfaces of the corrugated steel plate 100 and repeatedly forming the FRP reinforcing portion 200; A vacuum squeezing step of performing vacuum squeezing to combine the corrugated steel plate 100 and the FRP reinforcing part 200; And forming a FRP panel by curing and then processing the structure synthesized by the vacuum pressing step. [7] The present invention also provides a method of manufacturing an FRP panel for seismic reinforcement.

The FRP reinforcement forming step may include attaching the stiffener 210 along the long side direction of the corrugated steel plate 100; And a step of attaching a laminated stiffener 210b to the front surface or the rear surface of the stiffener 210. The stiffener 210 and the laminated stiffener 210b are arranged such that the direction of arrangement of the fibers is orthogonal to each other at regular intervals It is preferable that a plurality of lattice types are formed and the laminated stiffener 210b is arranged so as to be diagonal with respect to the arranging direction and the transverse direction of the fibers of the stiffener 210 and orthogonal to each other.

It is preferable that the total thickness of the FRP reinforcing part 200 is 0.5 to 1 cm.

The present invention relates to a method of constructing a seismic retrofitting FRP panel, comprising the steps of: forming a wall body (300a) by sandwiching the seismic retrofit FRP panel between a beam (10) and a column (20) The present invention also provides a construction method using an FRP panel for anti-seismic reinforcement.

The FRP reinforcing part 200 includes a guide plate 204 bent in a direction perpendicular to the side edges of the top plate 201 and the bottom plate 203, It is preferable that the FRP panel for anti-seismic reinforcement of the left side guide plate 204-1 and the right side guide plate 204-2 are anchored to each other.

It is preferable that the wall forming step is provided such that the cross section of the seismic strengthening FRP panel has a corrugated structure.

The present invention can provide emergency rescue against damage caused by earthquake, prevent secondary damage, convenient construction, secure ductility for deformation and effective ductility for energy absorption, This paper proposes an FRP panel for seismic retrofitting and its manufacturing method and a construction method using FRP panel for seismic retrofit for the recovery and reinforcement of emergency earthquake resistance in middle and low rise buildings.

1 to 6 show an embodiment of an FRP panel for seismic retrofitting according to the present invention,
1 is a sectional view showing a composite state of a corrugated steel plate and an FRP reinforced portion.
2 is a perspective view of one embodiment;
3 is a front view of the FRP reinforcement.
4 is a side view and an enlarged view of the FRP reinforcing portion.
5 is a perspective view of Fig.
6 is an enlarged side view of an embodiment;
7 to 9 illustrate an embodiment of a method of using the FRP panel for seismic retrofitting according to the present invention,
7 is a front view of the wall forming step
8 is an enlarged perspective view of Fig.
9 is an image showing a construction step.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1, the FRP panel for seismic retrofitting according to the present invention includes: a corrugated steel plate 100 having a predetermined volume and a corrugated portion 110 having corrugated structures on the front and rear surfaces; And an FRP reinforcing part 200 formed on exposed surfaces of the front and rear corrugated parts 110 so as to have the same structure as the corrugated part 110. The FRP reinforcing part 200 is formed by impregnating a plurality of cloths And a stiffener 210 of a structure having a laminated structure.

That is, the present invention proposes a simple FRP panel having a simple construction and capable of emergency recovery against a primary damage caused by an earthquake.

The above FRP is a new material composite material characterized by low weight and high rigidity.

The effect obtained by installing the panel using such FRP is as follows.

First, when the FRP panel of the present invention is installed quickly in case of damages such as sinking and cracks in the wall of the structure due to an earthquake or the like, initial restoration can be effectively performed.

Therefore, it is possible to effectively secure the stability of the structure even after the earthquake occurs, thereby greatly reducing the cost and the period of use for restoring the structure in the future.

Secondly, the FRP panel according to the present invention secures ductility effective for energy absorption through the corrugated steel sheet 100 disposed therein, and stiffness against deformation (hereinafter referred to as " stiffness ") through the FRP reinforcing part 200 attached to the outside of the corrugated steel sheet 100 (Figs. 1 and 2).

In other words, since the ductility and the stiffness can be improved simultaneously through the composite structure of the corrugated steel plate 100 and the FRP reinforcing part 200, it is possible to secure the long-term stability of the structure.

Further, by applying a fire-resistant coating to the surface of the FRP panel, it is possible to effectively reinforce the disadvantage of being vulnerable to fire or the like.

Third, the FRP reinforcing part 200 of the present invention is made of a composite material having a low weight and has a simple structure of the panel, which makes it easy to carry and construct.

In addition, the transportation cost, labor cost, and maintenance cost are alleviated, thereby ensuring economical efficiency.

In particular, the FRP panel may be fabricated into a single structure so that the FRP panel of the present invention is suitable for the size of a space to be installed in advance.

Further, it is also possible to pre-fabricate the FRP panel with assembled products each having a unit length, and attach and assemble a plurality of FRP panels so as to match the size of the space to be installed (FIG. 8).

In this way, since the prefabrication is performed, the structure can be installed simply in the field so that the emergency recovery of the structure can be performed quickly in case of earthquake damage, and the expense and time required for the operation can be effectively reduced.

Fourth, by using FRP as a new material composite material, it is possible to obtain economical effect by creating new demand for the development of new technology and application field of its utilization.

Specifically, the structure of the FRP panel for anti-seismic reinforcement of the present invention will be described as follows.

First, the cross section of the corrugated steel plate 100 and the FRP reinforcing portion 200 is formed in a corrugated structure.

Such a structure can effectively prevent the buckling phenomenon of the panel and can secure the stability of the structure.

The FRP reinforcing part 200 is characterized in that a plurality of stiffeners 210 are attached in a laminated structure by impregnation with an adhesive.

This structure is advantageous in that the attaching operation of the reinforcing member 210 for forming the FRP reinforcing part 200 is very simple.

Here, it is more effective in terms of function to use an epoxy as an adhesive.

The FRP reinforcing part 200 is preferably coated with a fireproof coating.

This makes it possible to solve the drawback that general structures are vulnerable to fire.

The reinforcing member 210 of the plurality of fabric structures forming the FRP reinforcing part 200 of the present invention is formed by mixing one or more of glass fibers or carbon fibers.

Here, the stiffener 210 is one of orthogonal fibers of a fabric or a mat so that the arrangement directions of the fibers are orthogonal to each other at regular intervals so that a plurality of grid-like shapes are formed.

Particularly, in the FRP reinforcing part 200, the fiber arrangement direction of the laminated stiffener 210b stacked on the front surface or the rear surface of the stiffener 210a and the stiffener 210a among the plurality of stiffeners 210 formed of the orthogonal fibers Are arranged diagonally with respect to the horizontal direction and are arranged to be orthogonal to each other.

As such, the laminated structure in which the fiber arrangement directions are diagonal with respect to the lateral direction and are mutually orthogonal has an advantage that the rigidity against deformation can be exerted more effectively in various angles.

In addition, since the reinforcing member 210 is attached to the long side of the panel when the FRP reinforcing part 200 is installed, the FRP reinforcing part 200 can be easily installed.

In order to more effectively prevent the buckling phenomenon of the panel due to the lateral force through the corrugated structure of the FRP reinforced portion 200, the corrugated structure is preferably formed as follows.

A plurality of inclined plates 202 bent downward at both ends of the upper plate 201 and a lower plate 203 bent horizontally at the ends of the plurality of inclined plates 202, (See Figs. 3, 4 and 5).

With such a structure, the lateral force concentrated on the top plate 201 is dispersed through the swash plate 202, and is stably supported through the bottom plate 203, so that the stiffness against deformation can be more effectively exerted.

The FRP reinforcing part 200 is characterized in that a guide plate 204 is formed by bending the upper plate 201 and the lower plate 203 in a direction perpendicular to the side ends.

The guide plate 204 can be used as follows.

A plurality of seismic retrofit FRP panels made of unit modules are installed in rows and anchored to the left guide plate 204-1 and the right guide plate 204-2 facing each other (FIG. 8) .

That is, the anchor coupling through the guide plate 204 has an advantage that the plurality of FRP panels can be easily and stably combined with each other.

Next, a method for manufacturing an FRP panel for seismic strengthening of the present invention will be described.

First, the corrugated steel sheet 100 is manufactured by bending and welding the steel sheet so that the corrugated portion 111 having the corrugated structure is formed on the front and rear surfaces.

The stiffener 210 is attached to the front and rear surfaces of the corrugated steel plate 100 by impregnating the adhesive material, and the reinforcing member 210 is repeatedly formed to form the FRP reinforcing portion 200 (FIG. 6).

The thickness of each of the reinforcing members 210 of the fabric structure is preferably about 0.1 to 0.15 mm.

It is more preferable from the structural and functional viewpoint that the total thickness of the FRP reinforcing portion 200 to which the stiffener 210 is repeatedly attached is 0.5 to 1 cm.

Further, the step of stacking the plurality of stiffeners 210 is performed as follows.

That is, the stiffener 210 is attached along the longitudinal direction of the corrugated steel sheet 100 by using the fiber of orthotropic fiber of the fabric or mat as the reinforcing material 210.

The advantage of this construction method is that it is very easy to manufacture.

Then, a step of attaching the laminated stiffener 210b to the front surface or the rear surface of the stiffener 210 is performed.

The stiffener 210 and the laminated stiffener 210b are arranged such that the arrangement directions of the fibers are orthogonal to each other at regular intervals so that a plurality of lattice types are formed and the laminated stiffener 210b is arranged in a direction Are arranged diagonally with respect to the horizontal direction and are arranged to be orthogonal to each other.

Through such an operation, the FRP reinforcing part 200 has an advantage that the rigidity against deformation can be exerted more effectively in various angles.

Then, in order to synthesize the corrugated steel plate 100 and the FRP reinforcing part 200, the resultant structure is vacuum-pressed through a vacuum blanking operation, and the resultant structure is cured in an oven and then processed to produce an FRP panel (FIG.

Next, a construction method using the FRP panel for anti-seismic reinforcement of the present invention will be described.

Reinforced FRP panel of the present invention is sandwiched between the beam 10 of the structure and the column 20 to form a wall body 300a (Fig. 7).

Particularly, it is characterized in that the cross section of the FRP panel has a corrugated structure.

With this structure, the buckling preventing effect of the FRP panel of the present invention can be maximized.

As described above, when the FRP panel made of the unit module is installed, a plurality of seismic retrofit FRP panels are installed in a row, and the left guide plate 204-1 and the right guide plate 204-2, And the anchor coupling is performed with respect to each other.

In this way, the FRP panel can be attached to the wall which has been lost due to the earthquake, so that it can replace the function of the wall, and it can be partially installed only on the damaged part of the wall to function together with the existing wall.

That is, the FRP panel of the present invention is advantageous in that, when a wall of a structure is damaged due to an earthquake or the like, it can be quickly and simply attached to a damaged area for effective emergency repair.

As a result, maintenance work on damaged walls is effectively performed, and reinforcement of the rigidity of the structure is prevented to prevent secondary damage, thereby securing long and short-term stability of the structure.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It is to be understood that both the technical idea and the technical spirit of the invention are included in the scope of the present invention.

100: corrugated steel plate 110: corrugated part
200: FRP reinforcing portion 201: upper plate
202: a swash plate 203:
204: guide plate 210: stiffener
300a: wall

Claims (14)

A corrugated steel plate 100 having a predetermined volume and having corrugated portions 110 formed on the front and rear surfaces thereof;
An FRP reinforcing part 200 formed on the exposed surfaces of the front and rear corrugated parts 110 so as to have the same structure as the corrugated part 110;
≪ / RTI &
The FRP reinforcing part 200 includes:
And a reinforcing member (210) having a plurality of cloth structures is attached by a bonding agent to the laminated structure. The method according to claim 1,
The stiffener 210
Wherein the FRP panel is formed by mixing one or more of glass fibers or carbon fibers. 3. The method of claim 2,
The stiffener 210
Wherein the FRP panel is one of a fabric or a mat which is arranged such that the arrangement directions of the fibers are orthogonal to each other at regular intervals so that a plurality of lattice types are formed. The method of claim 3,
The FRP reinforcing part 200 includes:
The fiber arrangement direction of the stiffener 210a and the laminated stiffener 210b stacked on the front surface or the rear surface of the stiffener 210a among the plurality of stiffeners 210 formed of the orthogonal fibers is diagonal with respect to the transverse direction, Wherein the FRP panel is arranged to be orthogonal. The method according to claim 1,
The FRP reinforcing part 200 includes:
An upper plate 201;
A plurality of inclined plates 202 bent downward at both ends of the top plate 201;
A lower plate 203 bent horizontally at the ends of the plurality of swash plates 202;
Wherein the unit unit is formed by repeating the crosswise direction. 6. The method of claim 5,
The FRP reinforcing part 200 includes:
A guide plate 204 bent in a direction perpendicular to the side edges of the top plate 201 and the bottom plate 203;
Wherein the FRP panel further comprises a reinforcing member. The method according to claim 1,
The adhesive may comprise epoxy
Wherein the FRP panel is made of a metal. The method according to claim 1,
The FRP reinforcing part 200 includes:
And the surface of the FRP panel is refractory-coated. A method of manufacturing an FRP panel for seismic retrofitting according to any one of claims 1 to 8,
A corrugated steel sheet manufacturing step of manufacturing the corrugated steel sheet 100;
A FRP reinforcing portion forming step of attaching the stiffener 210 of the cloth structure by impregnating the adhesive to the front and rear surfaces of the corrugated steel plate 100 and repeatedly forming the FRP reinforcing portion 200;
A vacuum squeezing step of performing vacuum squeezing to combine the corrugated steel plate 100 and the FRP reinforcing part 200;
A step of curing the structure synthesized by the vacuum pressing step and then processing to fabricate an FRP panel;
Wherein the FRP panel is made of a material selected from the group consisting of polypropylene and polypropylene. 10. The method of claim 9,
The FRP reinforcement forming step
Attaching a stiffener (210) along a longitudinal direction of the corrugated steel plate (100);
Attaching the laminated stiffener 210b to the front surface or the rear surface of the stiffener 210;
≪ / RTI &
The stiffener 210 and the laminated stiffener 210b are arranged such that the direction of arrangement of the fibers is orthogonal to each other at regular intervals,
Wherein the laminated stiffener (210b) is arranged diagonally with respect to an arrangement direction and a transverse direction of the fibers of the stiffener (210) so as to be orthogonal to each other. 10. The method of claim 9,
The FRP reinforcement forming step
Wherein the total thickness of the FRP reinforcing part (200) is 0.5 to 1 cm. 10. A construction method using the FRP panel for anti-seismic reinforcement according to any one of claims 1 to 8,
Reinforced FRP panel between the beam 10 and the column 20 of the structure to form a wall 300a;
Wherein the FRP panel is provided with a reinforcing member for reinforcing the FRP panel. 13. The method of claim 12,
The FRP reinforcing part 200 includes:
And a guide plate 204 bent in a direction perpendicular to the side edges of the top plate 201 and the bottom plate 203,
The wall forming step
A plurality of seismic retrofitting FRP panels made of unit modules are installed in rows and are anchored to the left guide plates 204-1 and the right guide plates 204-2 facing each other. Construction method using reinforced FRP panel. 13. The method of claim 12,
The wall forming step
Wherein the seismic retrofitting FRP panel is installed so that the cross section of the seismic retrofitting FRP panel has a corrugated structure.

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