KR102311629B1 - Optical sensor module installed in concrete reinforcement - Google Patents

Abstract

An optical sensor module for reinforcement is disclosed. The optical sensor module for reinforcement according to the present invention is an optical sensor module used in combination with an FRP reinforcement provided along the longitudinal direction of the concrete to support and supplement the deformation of the concrete, and is in contact with the FRP reinforcement and disposed along the longitudinal direction. a ladder-shaped support that is deformed together with the FRP reinforcement; a first epoxy layer applied to a predetermined thickness in an inner space partitioned by the support and the FRP reinforcing material in contact with the support to fix the support to the FRP reinforcing material; an optical fiber sensor installed such that a grating portion reflecting a portion of the light projected therein is located on the first epoxy layer; and a second epoxy layer applied to a predetermined thickness on top of the first epoxy layer so that the grid part is buried and integrated with the support, the first epoxy layer and the optical fiber sensor, to the concrete or the FRP reinforcement. Whether or not the deformation is detected based on a change in the reflected light reflected by the grating unit is characterized in that. According to the present invention, the lattice part of the optical fiber sensor can be safely protected, the deformation of concrete or FRP reinforcement can be accurately and reliably detected, and the optical fiber sensor can be easily constructed using a simple and simplified configuration. There is an effect that the lattice part can be integrated into the FRP reinforcing material in advance.

Description

Optical sensor module for reinforcing material {OPTICAL SENSOR MODULE INSTALLED IN CONCRETE REINFORCEMENT}

It relates to an optical sensor module for reinforcing materials, and more particularly, to an optical sensor module that is integrated with the FRP reinforcing material installed to support and supplement the deformation of the concrete and can detect whether the concrete or the FRP reinforcing material is deformed.

A concrete structure, for example, a concrete structure such as a pier of a bridge or a beam or a girder of a building, is deformed in the vertical or horizontal direction according to the lapse of time or external vibration after construction.

In the concrete structure in which the deformation occurs as described above, the technology for preventing or preventing damage or destruction of the concrete structure in advance by detecting the deformation portion and the aspect of the deformation in advance, in recent years, in terms of stability or reliability of the concrete structure is considered very important in

As a conventional technique for detecting deformation of a concrete structure, a plurality of strain gauges are attached to the surface of reinforcing bars for each section before pouring concrete, and a control device connected through an electric wire receives an electrical signal measured from each strain gauge. It is configured to determine whether the concrete structure is safe.

In other words, when deformation occurs in the concrete structure due to external force, etc., the control device measures the resistance value that is changed by the strain gauge that is attached to the reinforcing bar, etc. and deforms together. do.

However, in the conventional sensing technology using strain gauges, dozens to hundreds of strain gauges must be installed depending on the scale of the concrete structure, and dozens to hundreds of electrical wires are required for connection with the control device, so the construction is very complicated and Since it requires a lot of time and manpower, it is difficult to implement the entire detection system for the entire structure.

In addition, strain gauges and electrical wires buried by concrete pouring after being installed in the exposed state in the structure are easily deformed in the installation position due to pouring impact, etc., or damaged by disconnection or breakage. Problems and durability problems have been continuously pointed out.

In order to solve the above problem of the strain gage method, a method using an optical fiber having a fiber bragg grating (FBG) formed on one side that reflects only a specific wavelength component with respect to the incident light and transmits the remaining wavelength component as it is has been recently developed. It has been developed and applied in various fields.

More specifically, the method using such an optical fiber grating uses the property of changing the characteristics of reflected light when an external force such as temperature or bending deformation is applied to the optical fiber grating. By connecting to the locator and determining the characteristics of the measured reflected light, the deformation of the concrete structure is measured.

However, the method using such an optical fiber grating also had similar problems, such as when the concrete pouring process is performed after the optical fiber is laid on reinforcing bars, etc.

As a method to improve this, a closed circuit consisting of an optical fiber equipped with an optical fiber grid and an interlocator is installed double, or a package module is configured by attaching the optical fiber grid to a round bar-shaped fixing member, and the package is separately bound to reinforcing bars. etc have been developed.

However, the method using such a fixing member also fails to respond accurately to the deformation of the concrete structure or is easily removed from the attachment site because the integration between the round-bar-shaped fixing member and the optical fiber grid is not structurally strong. Continuous research and improvement are needed in that the strain is inaccurately measured, which seriously damages or lowers the reliability of the measurement.

An object of the present invention is that, after reinforcing concrete using FRP reinforcing material, detection of whether the reinforcing effect continues or the safety state of concrete can be basically performed, and sufficient attachment centering on the fiber bragg grating that responds to external force It is to provide an optical sensor module for reinforcing material in which the optical fiber is integrated into the FRP reinforcing material through simple construction with the length secured and can be firmly fixed.

The above object is an optical sensor module used by being coupled to a FRP reinforcement provided along the longitudinal direction of the concrete to support and supplement the deformation of the concrete, in contact with the FRP reinforcement and disposed along the longitudinal direction to deform with the FRP reinforcement a ladder-shaped support that becomes; a first epoxy layer applied to a predetermined thickness in an inner space partitioned by the support and the FRP reinforcing material in contact with the support to fix the support to the FRP reinforcing material; an optical fiber sensor installed such that a grating portion reflecting a portion of the light projected therein is located on the first epoxy layer; and a second epoxy layer applied to a predetermined thickness on top of the first epoxy layer so that the grid part is buried and integrated with the support, the first epoxy layer and the optical fiber sensor, to the concrete or the FRP reinforcement. Deformation is achieved by the optical sensor module for the reinforcing material, which is sensed based on the change in the reflected light reflected by the grating unit.

The support is formed in the longitudinal direction of the FRP reinforcement, respectively, a pair of first frames spaced apart to face each other; and a plurality of second frames that are spaced apart along the longitudinal direction of the FRP reinforcement and are coupled to connect between a pair of first frames to support the lattice part.

The thickness of the first frame based on the FRP reinforcing material may be formed to be thicker than the second frame so that the lattice part supported by the second frame does not protrude outward.

At both ends of the at least one first frame, a fastening groove and a fastening protrusion, which are complementary engaging structures, may be respectively formed so that the plurality of the supports are assembled in parallel in the longitudinal direction.

In the second frame, a mounting groove may be further formed in the central portion to guide the seating position of the grid portion.

The optical sensor module for the reinforcing material, in order to ensure that the grid portion is smoothly deformed in response to the deformation of the FRP reinforcing material, the FRP reinforcing material, the support, the first epoxy layer and the second epoxy layer. Each can be made of a material having a flexural modulus and integrated.

Another object of the above, is a concrete product in which a long groove is formed along the longitudinal direction of one or more reinforcing surfaces; FRP reinforcement fixed to the inside of the long groove by epoxy bonding to support and supplement the bending load applied to the concrete; A ladder-shaped support that is in contact with the FRP reinforcing material and is disposed along its longitudinal direction and deformed together with the FRP reinforcing material, and the support and the FRP reinforcing material in contact therewith, are coated with a predetermined thickness in the inner space partitioned by the FRP reinforcing material. A first epoxy layer fixed to the reinforcing material, an optical fiber sensor installed so that a grating part that reflects a portion of the light projected therein is located on the first epoxy layer, and the first epoxy layer so that the grating part is buried The change in the reflected light reflected by the grating is determined whether the concrete or the FRP reinforcement is deformed, including the support, the first epoxy layer, and the second epoxy layer integrated with the optical fiber sensor, applied to a predetermined thickness. Optical sensor module for reinforcing material to sense based on; and an elongated fire resistant member made of a heat-resistant material fixed to the long groove as if surrounding the FRP reinforcing material for shielding the FRP reinforcing material and external heat to the optical sensor module. is achieved

According to the present invention, the first epoxy layer that is disposed along the longitudinal direction of the FRP reinforcement and is applied to a ladder-shaped support that is deformed together with a predetermined thickness to fix the support to the FRP reinforcement, and the first epoxy layer. The optical fiber sensor is coated with a predetermined thickness on top of the first epoxy layer so that the grating part of the optical fiber sensor that reflects part of the projected light is buried inside the support, and the second epoxy layer that integrates the support, the first epoxy layer and the optical fiber sensor The lattice part of the lattice part is safely protected and it is firmly fixed to the FRP reinforcing material with sufficient attachment length so that it does not come off easily, so that the deformation of the concrete or FRP reinforcing material can be accurately and reliably detected.

In addition, through simple construction using a simple and simplified configuration such as the support and the first and second epoxy layers, the lattice part of the optical fiber sensor can be integrated into the FRP reinforcing material in advance. It has the effect of easily constructing a structural safety system.

1 is a perspective view of an optical sensor module for reinforcement according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along line AA of FIG. 1 .
3 and 4 are views sequentially illustrating the manufacturing process of FIG. 1 .
5 is a view showing a state in which the length of the support is varied by the attachment length corresponding to the field conditions of FIG. 1, respectively.
FIG. 6 is an overall configuration diagram for constructing a composite concrete material capable of detecting deformation using FIG. 1 .

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, in describing the present invention, descriptions of already known functions or configurations will be omitted in order to clarify the gist of the present invention.

1 is a perspective view of an optical sensor module for reinforcement according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line AA of FIG. 1, and FIGS. 3 and 4 are views sequentially showing the manufacturing process of FIG. , FIG. 5 is a view showing a state in which the length of the support body is varied with the attachment length corresponding to the field conditions of FIG. am.

Top (top), bottom (bottom), left and right (side or lateral), front (front, front), back (back, back), etc., which refer to directions in the description and claims of the invention, are not used for limiting rights. For convenience of explanation, the relative positions between the drawings and the components are determined as a reference, and are followed unless otherwise specifically limited.

The optical sensor module 100 for reinforcement according to the present invention is a sensor used by being coupled to the FRP reinforcement 10 provided along the longitudinal direction of the concrete object 210 in order to support and supplement the deformation of the concrete object 210. , the solid fixing to the FRP reinforcing material 10 is made simply, and the safe protection for the grid portion 132 of the optical fiber sensor 130 that detects the deformation of the FRP reinforcing material 10 is made together, so that the concrete ( 210) or FRP reinforcement (10), it is possible to more accurately and reliably detect the deformation of the structure.

Here, the FRP reinforcing material 10 is a component that is fixed to the inside of the concrete object 210 by epoxy (E) bonding and supports and supplements the bending load applied to the concrete object 210. It can be made by molding fiber-reinforced plastics (FRP) reinforced with glass or carbon fiber, which are high-performance, high-functional materials with excellent light weight, corrosion resistance, and moldability.

This FRP reinforcing material 10 is, as shown in FIG. 6, a long rod shape that is a corresponding shape that can be inserted and embedded in the long groove 212 formed on the reinforcing surface 210a (lower surface) of the concrete 210. It is molded to be built to support the lower portion of the concrete 210, the shape is not limited thereto and may be variously deformed.

In order to specifically implement the above-described function or action, the optical sensor module 100 for a reinforcement according to an embodiment of the present invention, as shown in FIGS. 1 to 5, the support 110, the first epoxy The layer 120 , the optical fiber sensor 130 , and the second epoxy layer 140 may be included.

Hereinafter, each of the aforementioned components will be described in detail.

First, the support 110 is a ladder-shaped component that is in contact with the FRP reinforcing material 10 and is disposed along its longitudinal direction and deforms together with the FRP reinforcing material 10 when an external force is applied. The optical fiber sensor 130 to be described later is described above. It may be installed in a structure interposed between the FRP reinforcing material 10 and the optical fiber sensor 130 so as to be supported in a state of being uniformly spaced from one FRP reinforcing material 10 .

Here, the reason that the support 110 is not manufactured in a rectangular plate shape and is specifically limited to a ladder shape is guided by the deformation of the optical fiber sensor 130 while smoothly deforming together without resisting the deformation of the FRP reinforcing material 10 according to an external force. In order to do this, the change in the reflected light characteristic of the grating unit 132 can be accurately and precisely made in response to the degree of deformation.

That is, specifically, the support 110 according to the embodiment of the present invention for smooth deformation guidance and spacing support for the optical fiber sensor 130 as described above, as shown in FIGS. 3 and 5, a pair of It may be configured to include one frame 112 and a plurality of second frames 114 .

A pair of first frames 112 are rod-shaped components that are respectively formed along the longitudinal direction of the FRP reinforcement 10 and are spaced apart to face each other. The gratings 132 of the optical fiber sensor 130 may be arranged in parallel along the longitudinal direction of the first frame 112 .

At this time, the first frame 112 is at least described later in order to prevent the grid portion 132 disposed in the inner space S from being directly damaged from an external impact applied in the direction of the first frame 112 . It is manufactured in a rod shape thicker than the optical fiber sensor 130 .

A plurality of second frames 114 are spaced apart along the longitudinal direction of the FRP reinforcing material 10 or the above-described first frame 112 and coupled to connect between a pair of first frames 112, a grid to be described later It is a bar-shaped component that directly supports the part 132 .

Due to the arrangement of the plurality of second frames 114, the support 110 as a whole forms a ladder shape, and thus the grating 132 of the optical fiber sensor 130 disposed in the above-described inner space S is shown in FIG. As shown in FIG. 2 , the plurality of second frames 114 may be firmly supported on the second frame 114 .

In addition, since the plurality of second frames 114 spaced apart have a structure that allows smooth free deformation of the support 110 itself compared to the plate shape, the grating 132 to be described later is freely deformed together with the support 110 and reflected light to precisely induce the characteristic change of

At this time, in the second frame 114 , a mounting groove 118 may be further formed in the central portion as shown in FIG. 3 to guide the seating position of the grid portion 132 , which causes the grid portion 132 to The second frame 114 can be installed in an accurate position in a state in which separation is prevented.

The thickness T2 of the second frame 114 is at least the first frame ( 112) will be manufactured in a thinner rod shape.

And the upper surface of the second frame 114 on which the grid part 132 is seated, as shown in FIG. 5, is located in the inner space (S), the lower surface of the second frame 114 in contact with the FRP reinforcement (10) is arranged to be on the same plane as the first frame 112 .

As a result, the first frame 112 described above based on the FRP reinforcement 10 does not protrude outwardly the grid portion 132 supported by the second frame 114 disposed as above, and deformation with minimal resistance is possible. It may be formed to be thicker than the second frame 114 in the possible thickness T1 range (eg, 1 mm to 3 mm above the seated grid portion 132 ).

As described above, the support 110 of the present invention composed of the first and second frames 112 and 114 corresponds to the FRP reinforcing material 10 that deforms together with the concrete 210 according to an external force. In order to be able to deform smoothly, it may be integrally manufactured using at least a material having a flexural modulus smaller than that of the FRP reinforcing material 10 .

^{Here, the flexural modulus is a physical quantity (kg/mm 2} ) obtained by dividing the energy required to destroy a material by an impact load by the unit area of the material. , the lower it is, the more flexible the material.

At this time, the material having a flexural modulus at least smaller than the FRP reinforcing material 10 is relatively softer than the FRP reinforcing material 10 and may be a metal material having greater rigidity than the first and second epoxy layers 120 and 140 to be described later, and plastic or a synthetic resin material such as silicone.

On the other hand, at both ends of the at least one first frame 112, as shown in Figs. 3 and 5, a fastening groove 116a and a fastening protrusion 116b, which are complementary engaging structures, may be formed, respectively. This is to ensure that the plurality of ladder-type supports 110 are assembled in parallel in parallel along the longitudinal direction.

Due to the mutual coupling structure of the support 110, the support 110 can freely change the length in response to the grid portion 132 of various lengths and shapes or structures on the site, so that the structure safety system is easy. A build can be made.

The first epoxy layer 120 is a component that is applied to a predetermined thickness in the inner space S partitioned by the support 110 and the FRP reinforcement 10 in contact with it, whereby the support 110 is made of FRP reinforcement ( 10) can be firmly fixed.

The first epoxy layer 120 is cured by placing a first mold (not shown) of a predetermined thickness on the support 110 and then applying a mixture of a sol or gel-type main agent and a curing agent to the inner space S. It can be formed by

Here, the first mold (not shown) of a predetermined thickness is a component that performs the same function as a masking tape to prevent the first epoxy layer 120 from leaking out of the inner space S of the support 110, 2 It may be manufactured to a thickness that covers a portion of the frame 114 and exposes the mounting groove 118 of the second frame 114 as described above.

Of course, even if there is no first mold (not shown), the above-described first frame 112 and second frame 114 can be used as a reference to prevent leakage of the first epoxy layer 120 and guide the coating thickness, respectively. .

The first epoxy layer 120 according to the embodiment of the present invention is relatively softer than the FRP reinforcing material 10 and the support 110 , and a plastic having a flexural modulus of greater rigidity than the second epoxy layer 140 to be described later. Or it may be formed of a synthetic resin material such as silicon.

In this case, the adjustment of the flexural modulus of the first epoxy layer 120 can be easily made by adjusting the type or content of the main agent and the curing agent.

The optical fiber sensor 130 reflects only a specific wavelength component of the light projected therein and transmits the remaining wavelength components as it is, but when it is deformed by an external force such as bending deformation, a grating unit 132 (FBG, FBG, Fiber Bragg Grating) is a component formed on one side of an optical fiber.

As shown in FIG. 6 , the optical fiber sensor 130 is deformed to the concrete 210 or the FRP reinforcing material 10 through the interlocator 20 that receives the characteristic change of the reflected light while connected to both ends, respectively. Since a commercially available product capable of discriminating or detecting, etc. is sufficient, the shape or arrangement of the grid is not particularly limited.

On the other hand, through the computer 30 connected to the interlocator 20, the user can monitor in real time whether the deformation of the structure such as the concrete 210 or the FRP reinforcement 10, and the deformation beyond the arbitrarily set limit is When it occurs, you can receive a notification, and if necessary, you can save the monitored information.

However, the optical fiber sensor 130 according to the embodiment of the present invention is to be integrated into the FRP reinforcement 10 together with the support 110 and the first epoxy layer 120 and the second epoxy layer 140 to be described later. so that the grid portion 132 is installed so as to be located on the first epoxy layer (120).

At this time, the optical fiber sensor 130 can be aligned in an accurate position in a state that is spaced apart from the FRP reinforcement 10 due to the mounting groove 118 of the second frame 114 described above.

Since the detailed structure and operation principle of the above-described optical fiber sensor 130 or interlocator 20 are well known techniques, a detailed description thereof will be omitted.

The second epoxy layer 140 is applied to a predetermined thickness on the upper portion of the first epoxy layer 120 so that the grid portion 132 of the above-described optical fiber sensor 130 is buried. As a component disposed outside, the support 110, the first epoxy layer 120, and the optical fiber sensor 130 can be coupled to the FRP reinforcement 10 in an integrated state.

The second epoxy layer 140 is a mixture in which a second mold (not shown) of a predetermined thickness is placed on the support 110 on which the first epoxy layer 120 is applied, and then a sol or gel-type main agent and a curing agent are mixed. It can be formed by laminating and curing the inner space (S).

Here, the second mold (not shown) of a predetermined thickness is a masking tape that allows the second epoxy layer 140 to be laminated on top of the first epoxy layer 120 without leaking out of the inner space S of the support 110 . As a component performing the same function, it may be formed to a thickness that corresponds to the thickness of the first frame 112 or can cover the first frame 112 thinly.

The second epoxy layer 140 according to the embodiment of the present invention, the FRP reinforcement 10, the support 110, the first epoxy layer 120 and the lattice portion 132, so as not to suppress the free deformation of these, A synthetic resin such as plastic or silicone having a soft flexural modulus is formed as a material.

In this case, the adjustment of the flexural modulus of the second epoxy layer 140 can be easily made through adjustment of the type or content of the main agent and the curing agent, as in the first epoxy layer 120 .

Of course, the second epoxy layer 140 and the first epoxy layer 120 may be respectively formed using the same material for convenience.

On the other hand, the optical sensor module 100 for reinforcement according to the present invention is applied to the concrete 210 together with the FRP reinforcement 10 to form a single composite concrete 200 .

As the composite concrete 200 is applied with the optical sensor module 100 for reinforcing material as described above, its deformation can be detected.

As described above, the composite concrete material 200 capable of detecting deformation promotes structural stability for the concrete object 210 in addition to deformation detection, and thermal deformation of FRP used as a reinforcing material even in a high-temperature environment and epoxy (E) fixing it It is an invention devised to enable quick and easy reinforcement and fire-resistance treatment with only simple external work without excessive man-hours or large-scale facility mobilization, along with versatility with an optimized structure and minimized configuration.

In order to specifically implement the above functions or actions, the composite concrete 200 capable of detecting deformation according to the present invention, as shown in FIG. It may be configured to include a module 100, a long fire resistant member 230, and the like.

Here, the optical sensor module 100 is coupled to one surface of the FRP reinforcing material 10 or the sub FRP reinforcing material 12 provided along the longitudinal direction of the concrete material 210 to support and supplement the deformation of the concrete material 210. As a sensor used, as shown in FIGS. 1 to 5 , it is configured to include a support 110 , a first epoxy layer 120 , an optical fiber sensor 130 and a second epoxy layer 140 , and the like. The description will be replaced with the above-mentioned content.

Concrete 210 is a component that is poured in a predetermined shape by mixing aggregate with cement paste to form a building or civil structure, and as shown in FIG. Although not shown, it may also be formed in the form of a column supporting between the upper slab and the lower slab.

In this concrete object 210, a plurality of FRP reinforcing materials 10 for reinforcing the concrete object 210 in various directions are embedded in the inside of the concrete object 210. A long groove 212 and a short groove 214 are formed in the concrete. It may be formed simultaneously with the pouring of the water 210 or through a post-cutting operation.

Here, the long groove 212 is a groove-shaped component formed along the longitudinal direction of one or more reinforcing surfaces 210a. The lower surface is formed to be elongated along the longitudinal direction with the reinforcing surface 210a.

And the short groove 214 is spaced apart in the longitudinal direction of the lower reinforcing surface 210a, as shown in FIG. 6, and a plurality of the reinforcing surface 210a and the adjacent surface thereof are symmetrical to face each other in a ''' shape. (or intersecting) may be placed.

These short grooves 214 are provided to additionally reinforce the concrete 210 through the burial of the secondary FRP reinforcement 12 to be described later. Therefore, in consideration of the degree of reinforcement required according to the installation environment of the concrete object 210, an appropriate number is formed.

The long groove 212 and the short groove 214 as described above are accommodated larger than the volume of the FRP reinforcement 10 and the auxiliary FRP reinforcement 12 so that the FRP reinforcement 10 and the sub FRP reinforcement 12 are smoothly inserted and buried. to form a volume.

The above-described FRP reinforcing material 10 is molded into a long rod shape that is a corresponding shape that can be inserted and embedded inside the long groove 212 formed on the reinforcement surface 210a (lower surface) of the concrete material 210, and the concrete material ( By supporting the lower surface of the 210), the bending load applied to the concrete 210 is supplemented or reinforced.

On the other hand, the secondary FRP reinforcing material 12 is fixed to the inside of the above-mentioned short groove 214 by filling of the epoxy (E) and is a component supporting and supplementing the multidirectional shear load applied to the concrete 210, as described above. As with the FRP reinforcing material 10, it is made by molding fiber-reinforced plastics (FRP) reinforced with glass or carbon fiber, which are high-performance and high-functional materials with excellent load durability, light weight, corrosion resistance, and moldability. will lose

This sub FRP reinforcing material 12 is a corresponding that can be inserted and embedded inside the short groove 214 formed over the reinforcing surface 210a (either the lower surface and the adjacent surface 210b) of the reinforcing surface 210 of the concrete object 210 . It is molded in the shape of '" to supplement or reinforce the multidirectional shear load applied to the concrete 210.

At this time, when the sub FRP reinforcement 12 is inserted into the short groove 214 as shown in FIG. 6, the upper end is anchored or fitted to the slab (or the upper end of the reinforced concrete), so that the concrete object 210 It is possible to increase the bearing capacity for the construction and to achieve quick and strong assembly at the construction site.

The FRP reinforcing material 10 and the sub FRP reinforcing material 12 can be reinforced and specialized in necessary functionality by adjusting the content of the composition or by additionally changing additives, etc. according to the composition of the concrete, the embedding conditions, the use environment, and the like.

Epoxy (E) for fixing the FRP reinforcing material 10 and the sub FRP reinforcing material 12 to the long groove 212 or short groove 214 is a solid bonding between the concrete stone and FRP through a curing process in a viscous liquid state. As a component to be used, various additives may be mixed and used according to the composition of the concrete, the buried condition or use environment, affinity with the FRP reinforcing material 10 used, and the like.

When both the FRP reinforcing material 10 and the sub FRP reinforcing material 12 are integrated with the concrete 210 through bonding with the epoxy (E), structural stability for the concrete 210 can be secured. However, the epoxy (E) has a weakness in that it loses adhesive strength when deformation by heat occurs, so it is necessary to compensate for this.

However, the epoxy (E) according to the embodiment of the present invention can be used without distinguishing between products having a glass transition temperature of about 65 ° C. can

The reason that the epoxy (E) can be selectively used without considering the resistance to heat in this way is that the long fire resistant member 230 and the short fire resistant member 240 provided on the outside of the epoxy (E) are transmitted from the outside. This is because the thermal deformation of the epoxy (E) can be minimized or prevented by effectively shielding heat.

In the bonding process by epoxy (E), the long refractory member 230 and the short refractory member 240 are placed in the long groove 212 or the short groove 214 in which the FRP reinforcement 10 and the sub FRP reinforcement 12 are respectively seated. After insertion and fixation, the epoxy (E) may be injected or filled through the open space at both ends of the long groove 212 or the short groove 214 .

Alternatively, in the bonding process by epoxy (E), after applying an appropriate amount of epoxy (E) to the long grooves 212 or short grooves 214 of the concrete 210, the FRP reinforcement 10 and the sub FRP reinforcement 12 are During the curing time, the long groove 212 or the short groove 214 may be made in a way that is pressed so that it is positioned properly.

The long fire resistant member 230 surrounds the FRP reinforcing material 10 in order to shield the FRP reinforcing material 10 and the epoxy (E) from external heat such as fire. As shown in FIG. 6 , it may have a modular structure including a main rim plate 232 and a fitting part 234 .

The main rim plate 232 is a component made of a heat-resistant material that covers and shields the long groove 212 from the outside so that the long groove 212 is not exposed to the outside, and has a length corresponding to the long groove 212 (or easy handling). length divided by one unit length), and a portion 232a fitted to fit the long groove 212 protrudes from the plate member to form a '⊥' or 'T' cross-sectional shape as a whole.

Here, the meaning of 'fitted tightly' does not mean that the outer shape of the inner side of the long groove 212 and the protruding part 232a of the main rim plate 232 physically matches perfectly, but frictional force is generated on the contact surfaces of both sides. It can be understood as encompassing the fact that the play is minimized to the extent that it does not easily fall out in a state where a separate external force is not applied.

The main rim plate 232 is sufficient as long as it can be manufactured in a shape corresponding to the long groove 212 using a heat-resistant or fire-resistant material that can effectively block the transfer of external heat to the inside of the long groove 212, so a specific composition Components, detailed shapes, etc. are not particularly limited.

However, the main plate 232 according to the embodiment of the present invention, clay, silicate, xiaoteil (acidified at an abnormal high temperature), chromium, alumina (neutralized at high temperature), chromium magnesia (basicized at high temperature) at least any one of It is manufactured and mass-produced in the form of a module by the refractory brick or refractory mortar manufacturing method as the main material including one.

The above main material may be appropriately selected and combined according to the composition of the concrete object 210 and the surrounding environment in which the concrete object 210 is poured and used.

The fitting part 234 is formed to protrude from the main rim plate 232 or is coupled to the main rim plate 232 to guide the FRP reinforcement 10 disposed in the separation space 235 to be placed in the correct position, and to the long groove 212 . As a pin-shaped component that is press-fitted and fixed, it may be made of a metal such as a reinforcing bar or a heat-resistant synthetic resin.

In order to specifically implement the function or operation of the fitting portion 234 as described above, the fitting portion 234 according to an embodiment of the present invention is, as shown in FIG. 6 , a pair of bar members disposed to face each other. It can be made by embedding molding integrally with the main rim plate 232 in a state of being spaced apart along the longitudinal direction of the main rim plate 232 .

The FRP reinforcing material 10 seated in the separation space 235 due to the fitting portion 234 that is integrally formed with the main rim plate 232 is placed between the fitting portions 234 spaced apart from each other and can maintain the correct position. And, the coupling force between the long groove 212 and the long fire resistant member 230 can be strengthened.

The short fire resistant member 240 is made of a heat-resistant material that surrounds the sub FRP reinforcing material 12 and is fixed to the short groove 214 in order to shield the sub FRP reinforcing material 12 and the epoxy (E) from external heat. is an element

The short fire resistant member 240 is a plate-shaped first fire resistant member 240a fixed to the short groove 214 on the side of the reinforcing surface 210a (the lower surface of the concrete 210) as shown in FIG. 6, It is composed of a plate-shaped second fire resistant member 240b fixed to the short groove 214 on the side of the adjacent surface 210b and forms a ''' shape corresponding to the sub FRP reinforcement 12 or the short groove 214 .

The first fire resistant member 240a is made of a modular structure including additional rim plates 242a and 242b and buchim portions 244a and 244b, and the additional rim plates 242a and 242b have a short groove 214. It is a plate-shaped component made of a heat-resistant material that covers and shields the short groove 214 from the outside so as not to be exposed to the outside, and is formed to have a length corresponding to the short groove 214 on the side of the reinforcing surface 210a.

These additional rim plates 242a and 242b, similar to the main rim plate 232 as described above, use a heat-resistant material or fire-resistant material that can effectively block external heat from being transmitted to the inside of the short groove 214. ) is sufficient as long as it can be manufactured in a form corresponding to the ), so specific compositional components or detailed shapes are not particularly limited.

Bugarimpan (242a, 242b) according to an embodiment of the present invention is also at least one of clay, silicate, xiaoteil (acidified at a high temperature), chromium, alumina (neutralized at high temperature), chromium magnesia (basified at high temperature) It is manufactured and mass-produced in the form of a module by the refractory brick or refractory mortar manufacturing method as the main material including one.

At this time, the above-mentioned main material may be appropriately selected and combined according to the composition of the concrete object 210 and the surrounding environment in which the concrete object 210 is poured and used.

The sub-fitting part 234 is a pin-shaped component that guides the sub-FRP reinforcement 12 to be placed in the proper position in the inner spaced space 245 and is press-fitted and fixed to the short groove 214, as shown in FIG. Likewise, a pair of rod members disposed to face each other may be formed by integrally embedding with the additional rim plates 242a and 242b in a state in which they are spaced apart along the longitudinal direction of the additional rim plates 242a and 242b.

The sub-FRP reinforcement 12 seated in the spaced space 245 due to the sub-fitting portion 234 formed integrally with the additional rim plates 242a and 242b is formed between the sub-fitting portions 244a and 244b spaced apart from each other. It is placed and can maintain its original position, and the coupling force between the short groove 214 and the short fire resistant member 240 can be strengthened.

The second fire resistant member 240b is only different from the first fire resistant member 240a in that it is a configuration applied to the installation position, that is, the short groove 214 on the adjacent surface 210b side, and the first fire resistant member 240a ), as well as the additional rim plates (242a, 242b) and the buchim portion (244a, 244b), such as made of a modular structure, the detailed description will be replaced with the above-described content.

In the foregoing, specific embodiments of the present invention have been described and shown, but it is common knowledge in the art that the present invention is not limited to the described embodiments, and that various modifications and variations can be made without departing from the spirit and scope of the present invention. It is self-evident to those who have Accordingly, such modifications or variations should not be individually understood from the technical spirit or point of view of the present invention, and the modified embodiments should belong to the claims of the present invention.

10: FRP reinforcing material 12: Sub FRP reinforcing material
20: interlocator 30: computer
100: optical sensor module for reinforcement 110: support
112: first frame 114: second frame
T1, T2: first and second frame thickness 116a, 116b: fastening groove, fastening protrusion
118: mounting groove S: inner space
120: first epoxy layer 130: optical fiber sensor
132: grid portion (FBG) 140: second epoxy layer
200: Composite concrete that can detect deformation
210: concrete 210a: reinforcement surface
210b: proximal surface 212: long groove
212a: step 214: step groove
E: Epoxy 230: Long fireproof member
232: main rim plate 232a: part of the main rim plate
234: fitting portion 235,245: separation space
240: short fire resistant member 240a: first fire resistant member
240b: second fire-resisting member 242a, 242b: additional rim plate
244a, 244b: Buchium part

Claims (7)

As an optical sensor module used in combination with FRP reinforcement provided along the longitudinal direction of the concrete to support and supplement the deformation of the concrete,
a ladder-shaped support that is in contact with the FRP reinforcing material and is disposed along its longitudinal direction and deformed together with the FRP reinforcing material;
a first epoxy layer applied to a predetermined thickness in an inner space partitioned by the support and the FRP reinforcing material in contact with the support to fix the support to the FRP reinforcing material;
an optical fiber sensor installed such that a grating portion reflecting a portion of the light projected therein is located on the first epoxy layer; and
Including a second epoxy layer that is applied to a predetermined thickness on top of the first epoxy layer so that the grid part is buried and integrated with the support, the first epoxy layer, and the optical fiber sensor,
Whether the concrete or the FRP reinforcing material is deformed is sensed based on a change in the reflected light reflected by the grating unit. According to claim 1,
The support is
a pair of first frames respectively formed in the longitudinal direction of the FRP reinforcement and spaced apart to face each other; and a plurality of second frames spaced apart along the longitudinal direction of the FRP reinforcing material and coupled to connect between a pair of first frames to support the grid portion. 3. The method of claim 2,
The thickness of the first frame based on the FRP reinforcement is,
An optical sensor module for reinforcement, characterized in that the second frame is formed thicker than the second frame so that the grid part supported by the second frame does not protrude outward. 3. The method of claim 2,
At both ends of the at least one first frame,
An optical sensor module for reinforcing material, characterized in that a fastening groove and a fastening protrusion, which are complementary engaging structures, are respectively formed so that a plurality of the supports are sequentially assembled in parallel along the longitudinal direction. 4. The method of claim 3,
The second frame is
An optical sensor module for reinforcement, characterized in that a mounting groove is further formed in the central part to guide the seating position of the grid part. According to claim 1,
The optical sensor module for the reinforcement,
In order to smoothly deform the grid portion in response to the deformation of the FRP reinforcing material, the FRP reinforcing material, the support, the first epoxy layer, and the second epoxy layer have a flexural modulus that decreases in the order of having a flexural modulus. Optical sensor module for reinforcing material, characterized in that each is made of material and integrated. Concrete in which a long groove is formed along the longitudinal direction of one or more reinforcing surfaces;
FRP reinforcing material fixed to the inside of the long groove by epoxy bonding to support and supplement the bending load applied to the concrete;
A ladder-shaped support that is in contact with the FRP reinforcing material and disposed along its longitudinal direction and deformed together with the FRP reinforcing material, and the support and the FRP reinforcing material in contact therewith, are coated with a predetermined thickness in an inner space partitioned by the FRP reinforcing material to form the support. A first epoxy layer fixed to the reinforcing material, and an optical fiber sensor installed so that a grating part that reflects a part of the light projected therein is located on the first epoxy layer, and the grating part is buried on the upper part of the first epoxy layer The change in the reflected light reflected by the grating is determined whether the concrete or the FRP reinforcement is deformed, including the support, the first epoxy layer, and the second epoxy layer integrated with the optical fiber sensor applied to a predetermined thickness. Optical sensor module for reinforcing material to sense based on; and
Composite concrete capable of detecting deformation, characterized in that it comprises an elongated fire resistant member of a heat-resistant material fixed to the long groove as if surrounding the FRP reinforcing material for shielding the FRP reinforcing material and external heat to the optical sensor module.

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