KR101603191B1 - 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 provides a FRP structure (100) comprising: a plurality of FRP structures (100) having FRP reinforcing portions (120) formed on front and rear exposed surfaces; And a damping connection part (200) for coupling between the plurality of FRP structures (100) to allow relative movement of the plurality of FRP structures (100). By presenting the construction method using this, it is possible to dissipate the vibration and impact transmitted to the structure in the event of an earthquake, to be able to recover emergency damage to the structure caused by the earthquake, to prevent secondary damage, It is possible to reduce the maintenance cost, and to secure both the rigidity for deformation and the ductility effective for energy absorption, thereby improving the long-term stability and short-term stability of the structure.

Description

FIELD OF THE INVENTION The present invention relates to a FRP reinforced proof panel for an anti-seismic reinforcement, a method of manufacturing the same, and a construction method using the FRP proof panel. [0001] The present invention relates to a FRP-

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a civil engineering and construction technology field, and more particularly, to an FRP strength panel for seismic strengthening, a method of manufacturing the same, and a construction method using the same.

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 the earthquake-resistant panel on the wall 300 during the earthquake damage recovery method, the existing material is reinforced with general construction materials such as brick 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.

On the other hand, in the case of the steel material represented by the soft material, although the efficiency of the pre-fabrication is high, the use of the steel as the material for emergency restoration because of its large weight is also not suitable because of problems in construction.

Therefore, rapid, effective, and continuous reinforcement measures against the second earthquake after the earthquake damage are needed.

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a method and system for recovering vibration and shock transmitted to a structure during an earthquake, FRP strength panel for anti-seismic reinforcement which can prevent short-term stability of the structure by securing both ductility to deformation and effective ductility to absorb energy, And a manufacturing method thereof and a construction method using the same.

In order to solve the above problems, the present invention provides a FRP structure having a plurality of FRP structures (100) having FRP reinforcing portions (120) formed on front and rear exposed surfaces thereof; And a damping coupling part (200) for coupling between the plurality of FRP structures (100) to allow relative movement of the plurality of FRP structures (100) .

The damping coupling part 200 is preferably formed of a viscoelastic material.

It is preferable that the damping coupling part 200 is formed of any one of rubber, viscoelastic, or a mixture thereof.

The damping coupling part 200 is preferably formed of a rigid material of the honeycomb structure 201.

The damping coupling part 200 formed of the honeycomb structure 201 is preferably formed of a material including a polymer.

The center portion of the damping coupling portion 200 may be formed of the honeycomb structure 201 along the height direction and the front and rear portions of the center portion may be formed of a viscoelastic material.

The FRP structure 100 preferably includes a lower joint portion 101 having a groove structure formed at a lower portion thereof so as to be coupled with the beam 10 of the structure.

The FRP structure 100 has a slot-like upper coupling part 102 formed on the upper part of the FRP structure 100 so as to be coupled with the beam 10 of the structure and having a long hole shape along the longitudinal direction of the FRP structure 100; And the length of the upper coupling part 102 in the longitudinal direction is larger than the diameter of the lower coupling part 101.

The plurality of FRP structures 100 may be formed of a box-like structure 130 and the damping joint 200 may be integrally coupled between the FRP structures 100 of the box-like structure 130.

The FRP structure 100 includes a steel plate 110 having a predetermined volume; And FRP reinforcing parts 120 formed on exposed surfaces of the steel plate 110 in the forward and rearward directions. The FRP reinforcing part 120 is formed by stacking a plurality of stiffeners 121 of a cloth structure by impregnation with an adhesive It is preferable to take an attached structure.

The adhesive preferably comprises epoxy.

The reinforcing material 121 is preferably formed by mixing one or more of glass fibers or carbon fibers.

It is preferable that the reinforcing member 121 is any one of a fabric or a mat which is arranged such that the arranging directions of the fibers are orthogonal to each other at regular intervals so that a plurality of lattice types are formed.

According to the present invention, there is provided a method of manufacturing the FRP structural frame for seismic retrofitting, comprising the steps of: preparing an FRP structure for manufacturing the plurality of FRP structures; And attaching the damping joint part (200) between the plurality of FRP structures (100). The present invention also provides a method of manufacturing an FRP seismic strengthening panel.

The FRP structure 100 includes a steel plate 110 having a predetermined volume; And FRP reinforcing parts 120 formed on exposed surfaces of the steel plate 110 in the forward and rearward directions. The FRP reinforcing part 120 is formed by stacking a plurality of stiffeners 121 of a cloth structure by impregnation with an adhesive And the step of fabricating the FRP structure 100 includes the steps of manufacturing the steel sheet 110; Forming an FRP reinforcing portion by attaching the stiffener 121 of the cloth structure by impregnating the adhesive to the exposed surface in the longitudinal direction of the steel plate 110 and repeatedly forming the FRP reinforcing portion 120; And a vacuum compression step of performing vacuum compression to synthesize the steel plate 110 and the FRP reinforcing part 120.

The FRP structure manufacturing step may include fabricating the plurality of FRP structures 100 as a box-like structure 130 and attaching the damping joints 200 to the FRP structure 100 so that the damping- .

The present invention is a construction method using the FRP strength panel for earthquake-proof reinforcement, wherein the FRP strength panel for earthquake-proof reinforcement is sandwiched between the beam 10 and the column 20 of the structure, The present invention also provides a method of constructing a FRP structural frame for an earthquake-proof reinforcement.

The FRP structure 100 is formed with an upper coupling part 102 having a slot-like structure on an upper part thereof to be coupled with the beam 10 of the structure, It is preferable to join the upper portion of the FRP structure 100 and the beam 10 of the structure.

The FRP structure 100 is formed with a lower joint portion 101 having a groove structure at a lower portion so as to be coupled to the beam 10 of the structure and the wall forming step is performed by the lower joint portion 101, It is preferable that the lower portion of the FRP structure 100 and the beam 10 of the structure are combined.

It is preferable that a plurality of seismic retrofitting FRP strength panels made of unit modules are installed in the wall forming step.

The present invention dissipates vibrations and shocks transmitted to a structure in the event of an earthquake, enables emergency recovery against damages caused by an earthquake, prevents secondary damage, facilitates production and construction, The present invention proposes a FRP strength panel for an earthquake-resistant reinforcement capable of reducing the cost, securing both ductility to deformation and ductility effective for energy absorption, and improving the long-term and short-term stability of the structure, .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a FRP panel according to an embodiment of the present invention;
1 is an enlarged perspective view showing a use state according to an embodiment;
2 is a perspective view showing a state of engagement between the FRP structure and the damping engagement portion;
3 is a front view showing the lower engaging portion;
4 is a front view showing the upper engaging portion;
5 is a plan view of one embodiment.
6 is an exploded view of a FRP structure;
7 is a perspective view of a FRP structure.
8 is a front view of the FRP structure.
9 is a perspective view showing a state of engagement of the stiffener.
10 is an image of a FRP panel.
11 is a front view showing an installation state according to an embodiment;
12 is a perspective view illustrating an installation state according to an embodiment;
13 is an enlarged perspective view showing a use state and a stress distribution according to an embodiment;

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

As shown in FIG. 1 and subsequent drawings, the FRP structural panel for anti-seismic reinforcement according to the present invention includes a plurality of FRP structures 100 having front and rear exposed surfaces formed with FRP reinforcement portions 120; And a damping coupling portion (200) coupling between the plurality of FRP structures (100) to allow relative movement of the plurality of FRP structures (100).

That is, in the present invention, an FRP panel having a simple construction and a simple structure is proposed so that emergency recovery can be performed for a primary damage caused by an earthquake.

Particularly, the FRP panel of the present invention does not only resist the strength and rigidity of the structure when an earthquake occurs, absorbs the transmitted energy to minimize damage to the FRP panel and the structure, dissipates the vibration and impact transmitted to the structure (Fig. 13).

It is the damping coupling portion 200 to exert such a function.

The FRP of the FRP reinforcing portion 120 is a new material composite material having a low weight and high rigidity.

The effect obtained by installing such a FRP strength panel 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, and it is possible to greatly reduce the cost and the period of use for restoring the structure in the future.

Secondly, when a load due to an earthquake is applied and a horizontal displacement occurs in the structure, shear deformation of the damping joint 200 occurs due to mutual deformation of the FRP strength panel installed in the structure, Absorption and dissipation of the structure, thereby minimizing damage to the structure and improving the structural stability.

Third, among the FRP panels of the present invention, the FRP structure 100 secures the ductility that is effective for energy absorption through the steel plate 110 disposed therein, and the FRP reinforcement 120 attached to the outside of the steel plate 110 It is possible to secure the rigidity against deformation (Fig. 6).

That is, since the ductility and the stiffness can be improved at the same time through the composite structure of the steel plate 110 and the FRP reinforcing portion 120, the long and short-term stability of the structure can be secured.

Fourth, the FRP reinforcing part 120 of the present invention uses a composite material having a low weight, and has a merit that the structure of the panel is very simple, and therefore, it is very easy to carry and construct (FIG. 7).

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

Fifth, the FRP panel of the present invention can be fabricated into a single structure so as to be suitable for the size of a space to be installed in advance.

Also, a plurality of FRP panels may be preassembled with assembled products having unit lengths, and a plurality of FRP panels may be attached and assembled by bolting to fit the size of the space to be installed.

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.

Sixth, by using FRP which is a new material composite material, it is possible to obtain economical effect by creating new demand for new technology development and application fields related to its usability.

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

First, the damping joint 200 of the present invention has a general shape, and it is preferable that the damping joint 200 is formed of a material having viscoelastic properties to more effectively exhibit the functions described above (FIGS.

The viscoelastic material can be deformed and restored with respect to a constant load, and the strain energy applied to the structure is canceled by the viscoelastic material, thereby ensuring the stability of the structure.

In other words, the conventional seismic retrofit panel functions to exhibit the buckling prevention function and the rigidity due to the energy absorption. On the other hand, the FRP panel of the present invention induces deformation of the panel itself, thereby absorbing and canceling the energy itself, The structure that can be restored quickly is minimized.

The above-mentioned viscoelastic material may be any material capable of exhibiting the above functions, but it is more effective in terms of function to be formed in any one of rubber, viscoelastic or a mixture thereof.

The above materials exhibit different responses and energy absorption capacities for the speed, temperature and natural oscillation period of the transfer load. They are excellent in elasticity to recover the original state after the load is removed after the load is applied .

That is, when the load is transmitted from the outside, since the damping joint 200 dissipates vibrations and impacts and permits relative movement between the plurality of FRP structures 100, fluidity is ensured and deformation occurs , It can be quickly restored to its original state.

The above structure can be more preferably implemented by forming a coupling portion for permitting relative driving on the upper and lower sides of the FRP structure 100.

In other words, the FRP structure 100 is formed at the upper portion and the lower joint portion 101 of the groove structure formed at the lower portion so as to engage with the beam 10 of the structure, (Fig. 2, Fig. 3 and Fig. 4).

In addition, the longitudinal direction diameter of the upper coupling portion 102 is larger than the diameter of the lower coupling portion 101.

The lower coupling portion 101 and the upper coupling portion 102 are fixed by an engaging member such as an anchor.

Here, when the load is applied to the structure, the lower joint portion 101 is maintained in a fixed state, while the FRP structure is moved along the longitudinal direction through the upper joint portion 102 having a slot- (100) is smoothly performed.

Such a structure can naturally realize a structure capable of absorbing energy by inducing shear deformation of the damping coupling portion 200 coupled between a plurality of FRP structures 100.

In other words, when the FRP panel of the present invention is installed as the wall body 300, the damping joint part 200 of the viscoelastic material behaves through the shear deformation due to the deformation of the wall body 300 in the event of an earthquake 13).

In addition, when the damping coupling unit 200 according to the present invention requires additional rigidity, the following effects can be maximized through the following structure.

That is, the damping coupling portion 200 is formed of a rigid material of the honeycomb structure 201 (FIG. 2).

The honeycomb structure 201 functions to improve the rigidity against deformation when a load is applied to the structure and deformation occurs.

The damping joint 200 of the present invention can maximize the energy absorption function and rigidity by using the viscoelastic material and the honeycomb structure 201 described above in combination.

At this time, the damping coupling portion 200 formed of the honeycomb structure 201 is formed of a material including a polymer so that the damping coupling portion 200 formed of the honeycomb structure 201 can be efficiently attached to the viscoelastic material. .

As shown in FIG. 2, the center portion of the damping coupling portion 200 is formed of a rigid material of the honeycomb structure 201 along the height direction, and the front and rear portions of the central portion are formed of a viscoelastic material Do.

That is, the rigidity against deformation is improved through the honeycomb structure 201, and smooth relative behavior is allowed through the viscoelastic material, and the damage of the structure can be reduced by absorbing the energy.

The plurality of FRP structures 100 shown in the present invention are formed of a box-like structure 130 and the damping joints 200 are integrally coupled to each other between the FRP structures 100 of the box- (Figs. 5 and 10).

The box-like structure 130 is very easy to install and assemble, and when assembled as a unit module, it is easy to assemble a plurality of structures and is structurally stable.

The FRP structure 100 of the present invention includes a steel plate 110 having a predetermined volume and an FRP reinforcing portion 120 formed on exposed surfaces of the steel plate 110 in the forward and backward directions (FIGS.

Here, it is preferable that the FRP reinforcing portion 120 has a structure in which a plurality of stiffeners 121 are attached in a laminated structure by impregnation with an adhesive (FIG. 9).

This structure is advantageous in that the attaching operation of the reinforcing member 121 for forming the FRP reinforcing portion 120 is very simple.

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

The reinforcing members 121 of the plurality of fabric structures forming the FRP reinforcing portion 120 of the present invention are formed by mixing one or more of glass fibers or carbon fibers.

The stiffener 121 is made of any one of orthogonal fibers of a fabric or a mat so that the arrangement direction of the fibers is orthogonal to each other at regular intervals so that a plurality of grid patterns are formed.

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

First, an FRP structure manufacturing step for manufacturing a plurality of FRP structures 100 is performed.

In the manufacturing process of the FRP structure 100, the steel sheet manufacturing step for manufacturing the steel sheet 110 is performed first, and the stiffener 121 of the cloth structure is attached by impregnating the front and back exposed surfaces of the steel sheet 110 with an adhesive , And the FRP reinforcing portion forming step for forming the FRP reinforcing portion 120 is repeated (FIG. 9).

The thickness of each of the reinforcing members 121 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 120 to which the reinforcing material 121 is repeatedly attached is 0.5 to 1 cm.

In order to synthesize the steel plate 110 and the FRP reinforcing part 120, a vacuum compression is performed through a vacuum blanking operation, followed by curing and processing.

A coupling step attaching step of attaching the damping coupling part 200 between the plurality of FRP structures 100 thus manufactured is performed (FIG. 10).

As described above, it is preferable to fabricate a plurality of FRP structures 100 in a box-like structure 130.

Therefore, it is preferable that the docking joint 200 is attached to the FRP structure 100 so as to have an integral structure.

Next, a construction method using the FRP strength panel for anti-seismic reinforcement of the present invention comprises the following steps.

A wall forming step of forming a wall body 300 is provided between the beam 10 and the column 20 of the structure so as to sandwich the FRP strength panel for seismic strengthening therebetween (Figs. 11 and 12).

Here, the upper and lower portions of the FRP structure 100 are coupled to the beams 10 of the structure by using coupling members such as an anchor to the lower coupling portion 101 and the upper coupling portion 102.

As described above, since the longitudinal direction diameter of the upper joint portion 102 is larger than the diameter of the lower joint portion 101, the upper portion of the structure is driven along the longitudinal direction while the lower portion is fixed when an earthquake occurs .

As described above, the FRP panel of the present invention can replace the function of the wall by attaching to the wall which has lost its function due to the damage of the earthquake, and can be partially installed only on the damaged part of the wall, and can 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.

In addition, when installing multiple seismic retrofit FRP strength panels made of unit modules, since heat is installed and multiple unit module panels are anchored, it is very easy to install in the field and is excellent in applicability and workability There are advantages.

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.

10: beam 20: pillar
100: FRP structure 101: Lower coupling part
102: upper coupling portion 110: steel plate
120: FRP reinforcement part 121: stiffener
130: box-shaped structure 200: damping coupling part
201: damping connection part of a honeycomb structure 300:

Claims (20)

A plurality of FRP structures 100 having front and rear exposed surfaces formed with FRP reinforcing portions 120;
And a damping coupling (200) coupling between the plurality of FRP structures (100) to allow relative movement of the plurality of FRP structures (100)
The FRP structure 100 includes a lower coupling portion 101 having a groove structure formed at a lower portion thereof so as to engage with the beam 10 of the structure. And an upper coupling part 102 formed on the upper part of the FRP structure 100 and having a slot-like structure formed along the longitudinal direction of the FRP structure 100,
The longitudinal direction diameter of the upper coupling portion 102 is larger than the diameter of the lower coupling portion 101,
The damping coupling part 200 is formed of a rigid material including a polymer and has a central part formed as a honeycomb structure 201 along a height direction,
Wherein the front and rear portions of the central portion are formed of any one of viscoelastic rubber and viscoelastic or a mixture thereof. delete delete delete delete delete delete delete The method according to claim 1,
The plurality of FRP structures (100)
Shaped structure 130,
Wherein the damping coupling part (200) is coupled between the FRP structures (100) of the box-like structure (130) in an integrated structure. The method according to claim 1,
The FRP structure 100 includes
A steel plate 110 having a constant volume;
An FRP reinforcing portion 120 formed on the exposed surface of the steel plate 110 in the front-rear direction;
≪ / RTI &
The FRP reinforcing portion 120
And a plurality of reinforcing members (121) of a cloth structure are attached by a laminate structure by impregnation with an adhesive. 11. The method of claim 10,
The adhesive
Epoxy
Wherein the FRP panel is made of a resin. 11. The method of claim 10,
The reinforcing member 121
Wherein the FRP panel is formed by mixing one or more of glass fibers or carbon fibers. 11. The method of claim 10,
The reinforcing member 121
Wherein the reinforcing fiber 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. A method of manufacturing an FRP seismic reinforcing panel according to any one of claims 1, 9, 10, 11, 12, 13,
An FRP structure manufacturing step of manufacturing the plurality of FRP structures 100;
A step of attaching the damping coupling part 200 between the plurality of FRP structures 100;
Wherein the FRP panel is made of a steel plate. 15. The method of claim 14,
The FRP structure 100 includes
A steel plate 110 having a constant volume;
And an FRP reinforcing portion 120 formed on the exposed surface of the steel plate 110 in the forward and backward directions,
The FRP reinforcing portion 120
A plurality of reinforcing members 121 of a cloth structure are attached in a laminated structure by impregnation with an adhesive,
The step of fabricating the FRP structure 100 may include
The steel plate manufacturing step of manufacturing the steel plate 110;
Forming an FRP reinforcing portion by attaching the stiffener 121 of the cloth structure by impregnating the adhesive to the exposed surface in the longitudinal direction of the steel plate 110 and repeatedly forming the FRP reinforcing portion 120;
A vacuum compression step of performing vacuum compression to synthesize the steel plate 110 and the FRP reinforcing part 120;
Wherein the FRP panel is made of a steel plate. 15. The method of claim 14,
The FRP structure manufacturing step
The plurality of FRP structures 100 are fabricated into a box-like structure 130,
The attaching step
Wherein the damping coupling part (200) is attached to the FRP structure (100) so as to have an integral structure. 14. A construction method using an FRP strength panel for anti-seismic reinforcement according to any one of claims 1, 9, 10, 11, 12, 13,
A wall forming step in which the seismic reinforcing FRP strength panel is sandwiched between the beam 10 of the structure and the column 20 to form a wall body 300;
Wherein the reinforcing member is formed of a FRP reinforced panel. 18. The method of claim 17,
The FRP structure 100 includes
An upper coupling part 102 of a slot-like structure is formed on the upper part of the structure so as to engage with the beam 10 of the structure,
The wall forming step
And the upper part of the FRP structure (100) is joined to the beam (10) of the structure by the upper joint part (102). 18. The method of claim 17,
The FRP structure 100 includes
A lower joint portion 101 of a groove structure is formed at a lower portion to be engaged with the beam 10 of the structure,
The wall forming step
Wherein the bottom part of the FRP structure (100) is joined to the beam (10) of the structure by the lower joint part (101). 18. The method of claim 17,
The wall forming step
A plurality of seismic retrofitting FRP strength panels made of unit modules are installed by heating.

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