KR102237641B1 - Frp reinforced concrete structures with fire resistance - Google Patents

Abstract

A refractory finished FRP reinforced composite concrete material is disclosed. The refractory-finished FRP-reinforced composite concrete material according to the present invention comprises: a concrete material in which a long groove is formed along the longitudinal direction of one or more reinforcing surfaces; FRP reinforcement which is fixed to the inside of the long groove by epoxy bonding to support and supplement the bending load applied to the concrete material; And an elongated fire-resistant member of a heat-resistant material fixed to the elongated groove as if surrounding the FRP reinforcement so that the FRP reinforcement is shielded from external heat. According to the present invention, a heat-resistant material in which the long groove in which the FRP reinforcement is located is integrally molded or the FRP reinforcement made in the form of a module surrounds the concrete material in which the long groove is formed by cutting, etc., and is press-fitted into the long groove. As it is firmly fixed together with the tensile refractory member, the concrete material itself is structurally reinforced, and the structural stability of concrete can be ensured to a certain level even in high temperature environments through the elongated refractory member. Versatility to be easily applied regardless of whether water is newly installed or installed, and work performance in which reinforcement and fire-resistance treatment are simultaneously performed easily with simple external work on concrete without requiring large-scale facility mobilization or excessive work, and construction resulting from this There is an effect that can reduce time and cost.

Description

FRP reinforced composite concrete with fire-resistant finish {FRP REINFORCED CONCRETE STRUCTURES WITH FIRE RESISTANCE}

The present invention relates to a fire-finished FRP-reinforced composite concrete, and more particularly, a reinforcement method is easily performed only with a simple external operation for newly installed or already installed concrete, as well as FRP and epoxy that are vulnerable to heat used as reinforcing materials. It relates to a fire-finished FRP reinforced composite concrete that can effectively shield from external high heat.

In the conventional method of reinforcing structures using Fiber Reinforced Polymer Composites (FRP), fiber-reinforced composites are attached to the outside of the structure using epoxy (adhesive), or the grooves of the structure are dug and fibers are placed in the grooves. The reinforced composite material was bonded using an epoxy adhesive to reinforce the structure.

However, this bonding method has a problem in that it is easy to lose the fixing power to FRP due to damage, deterioration or deterioration in the environment of epoxy slip, external impact, and high temperature (approximately 65°C, which is the glass transition temperature of epoxy). There was a weak problem.

Among the prior technologies related to the reinforcement method using FRP as above, Republic of Korea Patent No. 1618252 (announcement date: May 4, 2016) describes the technology for a fiber reinforced plastic (FRP) reinforcement device and a structure reinforcement method using the same. It is starting.

The present prior art includes an FRP core 10 in which a plurality of fiber bundles 1 are entirely impregnated with resin to have a bar shape; An anchor mount 20 in the form of a circular rod or a polygonal rod impregnated with resin in the form of a roving perpendicular to the FRP core 10; Using a fiber reinforced plastic (FRP) reinforcement device including an anchor 30 fixed to the hole (H) surrounding the outer surface of the anchor mount 20, (a) spraying resin together with fibers on the surface of the structure Constructing a first fiber reinforced coating layer 50; (b) inserting the anchor 30 of the fiber-reinforced plastic (FRP) reinforcing device into the hole (H) of the structure to cover the first fiber-reinforced coating layer 50.

However, the prior art described above has the advantage that the reinforcing performance is further improved as the FRP core is more firmly fixed on the surface of the structure and the end peeling can be prevented, but the coating layer after installing the fiber reinforced plastic (FRP) reinforcement device Due to the fact that resin is repeatedly sprayed together with fibers on the surface of the structure for the construction and covering steps, excessive process time is inevitably required to solidify the resin, and construction on the reinforcing surface facing the ground prevents the sprayed resin from falling. There is a problem in that it is difficult to shorten the construction time, which is a topic in the construction field, with the proposed process steps in that a separate structure installation or equipment must be accompanied.

In particular, in recent years, when ignition due to vehicle defects, fires due to non-implementation of buildings, fires due to arson or negligence, etc. are frequently occurring, structural stability of buildings against fires is becoming more important, but this prior art is also technically designed for this. As the contrast is still not presented in detail, a structural solution is needed.

It is an object of the present invention to effectively shield FRP, which is a reinforcing material vulnerable to heat, and epoxy for bonding from external heat, thereby ensuring a certain level of structural stability for a concrete structure even in a high temperature environment, and can be applied to both newly installed or installed concrete. It is to provide a fire-finished FRP reinforced composite concrete that can be easily reinforced only by external work on concrete without mobilizing large-scale facilities.

The object is a concrete material in which a long groove is formed along the longitudinal direction of one or more reinforcing surfaces; FRP reinforcement which is fixed to the inside of the long groove by epoxy bonding to support and supplement the bending load applied to the concrete material; And it is achieved by a fire-finished FRP reinforced composite concrete material comprising a heat-resistant material long fire-resistant member fixed to the long groove as if surrounding the FRP reinforcement so that the FRP reinforcement is shielded from external heat.

The elongated refractory member includes: a main shielding plate made of a heat-resistant material that covers and shields the elongated groove while a part of the elongated groove is not exposed to the outside; And a fitting part protruding from the main cover plate in a state spaced apart from the main cover plate so that the FRP reinforcing material is positioned in the inner spaced space, or coupled to the main cover plate to be press-fitted into the long groove.

The inserting portion may have an arrow-shaped end portion in the insertion direction so as to be fixed to the stepped jaw extended in the long groove.

The concrete material is spaced apart in the longitudinal direction of one or more reinforcing surfaces, and may be formed such that a plurality of'"'-shaped short grooves face each other along the width direction of the reinforcing surface and a surface adjacent thereto.

The composite concrete material is fixed to the inside of the short groove by epoxy bonding to support and supplement the multi-directional shear load applied to the concrete material; And a short fireproof member made of a heat-resistant material fixed to the short groove as if surrounding the secondary FRP reinforcement so that the secondary FRP reinforcement is shielded from external heat.

The short fireproof member is composed of a first fireproof member made of heat-resistant material fixed to the end groove of the reinforcing surface, and a second fireproof member made of heat-resistant material fixed to the end groove of an adjacent surface, and each of the first and second fireproof members Silver, an additional rim plate made of heat-resistant material to cover and shield the short grooves from being exposed to the outside; And a buf-fitting portion that is formed protruding from the additional rim plate in a state spaced apart from the additional rim plate so that the sub-FRP stiffener is positioned in the inner spaced space, or is coupled to the additional rim plate and press-fitted to the end groove.

Another object of the above is (a) forming a long groove along the longitudinal direction of a reinforcing surface that is at least one of the outer surfaces of the installed concrete material or integrally forming the long groove with the concrete material; (b) protruding a pair of fitting portions spaced apart from each other from the main covering plate of heat-resistant material, or combining the fitting portions of a separate object to the main covering plate to pre-fabricate a long fire-resistant member in a module shape; (c) pre-fabricating an FRP stiffener in a rod shape that can be seated in the inner spaced space of the fitting portion and corresponds to the length of the long groove; (d) mounting the FRP stiffener in the inner spaced space of the fitting portion and then press-fitting the long fireproof member into the long groove; And (e) filling the epoxy through the open space at both ends of the long groove.

The step (a) is arranged to be spaced apart in the longitudinal direction of the reinforcing surface, which is at least one of the outer surfaces of the concrete, and forming a plurality of'"'-shaped short grooves to face each other along the width direction of the reinforcing surface and the adjacent surface, and the ( In step c), in order to support and supplement the multi-directional shear load applied to the concrete material, an auxiliary FRP stiffener is manufactured in a shape corresponding to the inner side of the short groove, and in step (b), the auxiliary FRP stiffener is external To be shielded from heat, a short fireproof member, which is a heat-resistant material fixed to the short groove as if surrounding the sub FRP reinforcement, is manufactured, and the step (d) includes the sub-FRP reinforcement seated on the short fireproof member and then the short fireproof member. The member is press-fitted into the short groove, and the step (e) may further include filling an epoxy through a space open to one end side of the short groove.

According to the present invention, a heat-resistant material in which the long groove in which the FRP reinforcement is located is integrally molded or the FRP reinforcement made in the form of a module surrounds the concrete material in which the long groove is formed by cutting, etc., and is press-fitted into the long groove. As it is firmly fixed together with the tensile refractory member, the concrete material itself is structurally reinforced, and the structural stability of concrete can be ensured to a certain level even in high temperature environments through the elongated refractory member. Versatility to be easily applied regardless of whether water is newly installed or installed, and work performance in which reinforcement and fire-resistance treatment are simultaneously performed easily with simple external work on concrete without requiring large-scale facility mobilization or excessive work, and construction resulting from this There is an effect that can reduce time and cost.

1 is a perspective view of a fire-resistant finished FRP-reinforced composite concrete according to an embodiment of the present invention.
2 is an exploded perspective view of FIG. 1.
3 is a side view of FIG. 1 and a cross-sectional view taken along cut lines AA and BB, respectively, showing a modified fitting portion.
4 is a diagram in which a flowchart and a process chart for manufacturing FIG. 1 are matched, respectively.

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 functions or configurations that are already known will be omitted in order to clarify the gist of the present invention.

1 is a perspective view of a fire-finished FRP-reinforced composite concrete according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of FIG. 1, and FIG. 3 is a cross-sectional view taken along the side of FIG. 1 and cut lines AA and BB, modified It is a diagram showing each fitting portion, and FIG. 4 is a diagram in which a flowchart and a process diagram for manufacturing FIG. 1 are matched, respectively.

In the description and claims of the invention, the upper (upper), lower (lower), left and right (lateral or lateral), front (front, front), rear (fold, rear), etc., which refer to directions, etc., are not intended for limitation of rights. For convenience of description, it is determined based on the relative position between the drawings and the components, and each direction described below is based on this, except for a case otherwise specifically limited.

Prior to the description of the present invention, structures such as concrete beams, which are generally used in construction, are manufactured by mixing aggregates with cement paste using a formwork or the like, and solidifying them into a predetermined shape.

However, these concrete structures formed only of aggregate and cement pool have excellent compressive strength and durability, but structural stability by installing a separate reinforcing material inside to structurally compensate or reinforce the disadvantages of weak tensile strength or cracks due to shrinkage. I am trying to do it.

The fire-finished FRP-reinforced composite concrete material 100 according to the present invention promotes structural stability with respect to the pre-installed or newly formed concrete material 110, and is used as a reinforcing material even in a high-temperature environment, and an epoxy fixing it. In addition to minimizing the thermal deformation of (E), the optimized structure and the minimized configuration allow for versatility, as well as quick and easy reinforcement and fireproof treatment with only simple external work without excessive labor or large-scale facility mobilization. It is an invention devised to reduce construction time and cost.

In order to specifically implement the functions or actions as described above, the fire-finished FRP-reinforced composite concrete material 100 according to an embodiment of the present invention is, as shown in FIGS. 1 to 3, a concrete material 110 , FRP reinforcement 120, may be configured to include a long refractory member 130 and a short refractory member 140, and the like.

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

First, the concrete material 110 is a component that is poured in a predetermined shape by mixing aggregate with cement pool to form a building or civil structure, and as shown in the drawing, the upper slab and the beam shape for supporting it It may be made of, and although not shown, may be formed in the form of a column supporting between the upper and lower slabs.

In this concrete material 110, a plurality of FRP stiffeners 120 for reinforcing the concrete material 110 in various directions are buried inside the concrete material 110, and a long groove 112 and a short groove 114 are formed of concrete. It may be formed simultaneously with the pouring of the water 110 or through a post-cutting operation.

Here, the long groove 112 is a groove-shaped component formed along the longitudinal direction of one or more reinforcing surfaces 110a, and as shown in FIGS. 2 and 3, a prosthetic concrete material 110 supporting the lower part of the slab In the case of, the lower surface is formed to be elongated along the longitudinal direction with the reinforcing surface 110a.

In addition, the short grooves 114 are spaced apart in the longitudinal direction of one or more reinforcing surfaces 110a, and are symmetrical (or cross) so that a plurality of the reinforcing surfaces 110a and adjacent surfaces face each other in a'"' shape along the width direction. As a constituent element in the shape of a groove to be disposed, as shown in Figs. 2 and 3, in the case of the prosthetic concrete material 110 supporting the lower part of the slab, the'''' spanning either side of the two side surfaces 100b adjacent to the lower surface thereof. Formed spaced apart.

These short grooves 114 are formed for additional reinforcement of the concrete material 110 through the sub-FRP reinforcement 122 to be described later, and when formed in an excessive number, workability, etc. may be significantly reduced, In consideration of the degree of reinforcement required according to the installation environment of the concrete material 110, it should be formed in an appropriate number.

The long groove 112 and the short groove 114 as described above are of the FRP stiffener 120 and the sub FRP stiffener 122 so that the FRP stiffener 120 and the sub-FRP stiffener 122 to be described later can be smoothly inserted and buried. It is formed to have an accommodation volume larger than the volume.

The FRP stiffener 120 is a component for supporting and supplementing the flexural load applied to the concrete 110 by being fixed to the inside of the elongated groove 112 described above by epoxy (E) bonding. It is made by molding plastic composite materials (FRP, fiber reinforced plastics) reinforced with glass or carbon fiber, which are high-performance and high-functional materials with excellent corrosion resistance and formability.

This FRP stiffener 120 is molded into a long rod shape, which is a corresponding shape that can be inserted and buried inside the long groove 112 formed on the reinforcing surface (110a) (bottom) of the concrete material (110), and the concrete material (110) By supporting the lower surface of the concrete material 110, the bending load applied to the concrete material 110 is supplemented or reinforced.

On the other hand, the secondary FRP stiffener 122 is a component for supporting and supplementing the multidirectional shear load applied to the concrete material 110 by being fixed to the inside of the above-described short groove 114 by epoxy (E) bonding, the above Like one FRP reinforcement (120), it is formed by molding plastic composite materials (FRP, fiber reinforced plastics) reinforced with glass or carbon fiber, which are high-performance and high-functional materials that are excellent in durability against load, light weight, corrosion resistance, and formability. You lose.

This sub-FRP reinforcement 122 is a response that can be inserted and embedded in the inside of the short groove 114 formed over the reinforcing surface (110a) of the concrete material (110) (any one of both sides, which is the lower surface and the adjacent surface (110b)) It is molded into a shape of'"' and supports the concrete material 110 to supplement or reinforce the multidirectional shear load applied to the concrete material 110.

At this time, the auxiliary FRP reinforcement 122, as shown in Fig. 3, when inserted into the inside of the short groove 114, the upper end of the slab (or the upper end of the concrete) to be anchored or fitted to the concrete material 110 It is possible to increase the supporting power for and to achieve fast and robust assembly at the construction location.

The FRP reinforcement 120 and the sub-FRP reinforcement 122 may enhance and specialize the necessary functionality by adjusting the content of the composition or additionally changing additives depending on the composition constituting the concrete, the conditions of landfilling or the environment of use.

Epoxy (E) fixing the FRP reinforcement 120 and the sub-FRP reinforcement 122 to the long groove 112 or the short groove 114 is a solid bond between the concrete stone and FRP through the curing process in a viscous liquid state. As a component to be built, various additives may be mixed and used depending on the composition of concrete, the conditions of landfilling or the environment of use, and the affinity with the FRP reinforcement 120 to be used.

When the bonding by this epoxy (E) is made, both the FRP reinforcement 120 and the sub-FRP reinforcement 122 are integrated with the concrete material 110 to ensure the intended structural stability. However, since epoxy (E) has a vulnerability that loses adhesion when deformation occurs due to heat, it is necessary to compensate for this.

However, the epoxy (E) according to the embodiment of the present invention does not distinguish not only commercial products having a glass transition temperature of approximately 65°C and lack of high-temperature resistance, but also commercial products having excellent high-temperature resistance with a glass transition temperature of 120°C. Can be used without.

The reason why the epoxy (E) can be selected and used without special consideration for heat resistance is that the long fireproof member 130 and the short fireproof member 140, which will be described later, provided on the outside of the epoxy (E) are transmitted from the outside. This is because heat can be effectively shielded so that heat deformation of the epoxy (E) can be minimized or prevented.

In the bonding process by epoxy (E), the FRP stiffener 120 and the sub-FRP stiffener 122 are respectively seated in the long fireproof member 130 and the short fireproof member 140 in the long groove 112 or the short groove 114. After press-fitting and fixing, the epoxy (E) may be injected or filled through the open space at both ends of the long groove 112 or the short groove 114 without separate pressing or fixing the position.

Alternatively, in the bonding process by epoxy (E), after applying an appropriate amount of epoxy (E) to the long groove 112 or the short groove 114 of the concrete material 110, the FRP reinforcement 120 and the sub-FRP reinforcement 122 It may be made in a manner of pressing to maintain the correct position in the long groove 112 or the short groove 114 during the curing time.

The elongated refractory member 130 is a component made of a heat-resistant material fixed to the elongated groove 112 as surrounding the FRP reinforcement 120 to shield the FRP reinforcement 120 and the epoxy (E) from external heat, FIG. 2 And, as shown in Figure 3, it may be made of a modular structure including the main cover plate 132 and the fitting portion 134, and the like.

The main shielding plate 132 is a component made of a heat-resistant material that covers and shields the long groove 112 from the outside while part of the long groove 112 is inserted into the long groove 112 so that the long groove 112 is not exposed to the outside. ) In the plate member formed of a length corresponding to (or divided into unit lengths that are easy to handle), a part (132a) that fits snugly into the long groove 112 protrudes so that the cross-sectional shape is'⊥' or'T' as a whole. Form.

Here, the meaning of'fitted tightly' does not mean that the inner space of the long groove 112 and the outer shape of the protruding part (132a) of the main cover plate 132 are completely physically matched, and frictional force is generated at the contact surfaces of both sides. Therefore, it is meant to encompass the minimized clearance to the extent that it is not easily removed in a state in which no separate external force is applied, and hereinafter may be understood as the same meaning.

If the main shielding plate 132 can be separately manufactured in a modular form for the standardized long groove 112 using a heat-resistant material or a refractory material that can effectively block external heat from being transmitted to the inside of the long groove 112 , The specific composition or detailed shape, etc. are not particularly limited.

However, the main shielding plate 132 according to the embodiment of the present invention is at least any of clay, silicate, xiaotezil (acidified at higher temperatures), chromium, alumina (neutralized at high temperatures), and chromiummagnesia (basicized at high temperatures). The main material including one is manufactured and mass-produced in the form of a module by the method of manufacturing refractory bricks or refractory mortar.

At this time, the above-described main material may be appropriately selected and combined according to the composition of the concrete material 110 and the surrounding environment in which the concrete material 110 is poured and used.

The fitting portion 134 is formed protruding from the main shielding plate 132 in a state spaced apart from the main shielding plate 132 so that the FRP reinforcement 120 is located in the inner spaced space 135 or coupled to the main shielding plate 132 to the long groove 112 As a rod-shaped component that is press-fitted and fixed, it may be made of metal such as reinforcing bar or heat-resistant synthetic resin.

In order to specifically implement the functions or actions of the fitting portion 134 as described above, the fitting portion 134 according to an embodiment of the present invention is, as shown in FIGS. 2 and 3 (a) and (b). , A pair of rod members arranged to face each other may be integrally embedded with the main shield plate 132 in a state disposed at predetermined intervals along the longitudinal direction of the main shield plate 132.

In this way, the fitting part 134 formed integrally with the main shield plate 132 is press-fitted into the long groove 112 while supporting the FRP reinforcement 120 seated in the spaced space 135 in the correct position, thereby the long groove 112 To form a bonding force.

In addition, the arrow-shaped fitting portion 134a according to the modified example of the present invention is a pair of arrow-shaped fitting portions 134a disposed to face each other, as shown in (a') and (b') of FIG. 3 Members are arranged at predetermined intervals along the longitudinal direction of the main cover plate 132, and are fastened to the main cover plate 132 by a predetermined coupling hole (not shown), that is, an anchor, an anchor bolt, and an anchor nut, or integrally without a coupling hole. It can be buried.

In this way, the arrow-shaped fitting portion (134a) fastened to the main shield plate 132 by a predetermined coupling or integrally is a long groove 112 in a state in which the FRP stiffener 120 seated in the spaced space 135 is supported at the correct position. ) By press-fitting and fixing it to form a coupling force to the long groove (112).

At this time, the insertion direction end of the arrow-shaped fitting portion (134a) is a structure that is fixed to each of the stepped jaws (112a) expanded inside the long groove (112) by the elastic force, even if the epoxy (E) is not applied in advance, the FRP reinforcement (120) ) Can be maintained in a fixed position without being separated from within the long groove 112, and when the application or filling of the epoxy (E) is made later, it exhibits a more solid and overlapping fixing power.

The short fireproof member 140 is composed of a heat-resistant material fixed to the short groove 114 as surrounding the secondary FRP reinforcement 122 to shield the above-described secondary FRP reinforcement 122 and epoxy (E) from external heat As an element, a plate-shaped first fireproof member 140a made of a heat-resistant material fixed to the short groove 114 on the side of the reinforcing surface 110a (lower surface of the concrete material 110), as shown in FIGS. 2 and 3, and , It may be composed of a plate-shaped second fireproof member 140b made of a heat-resistant material that is fixed to the short groove 114 on the side of the adjacent surface 110b, and, unlike shown, in the sub-FRP reinforcement 122 or the short groove 114 It may be integrally molded into a corresponding bent'"' shape.

The first fireproof member (140a) is made of a modular structure including an additional rim plate (142a) and a part (144a), etc., the additional rim plate (142a) is in the end groove 114 on the side of the reinforcing surface (110a) It is a plate-shaped component made of a heat-resistant material that is formed in a corresponding length to cover and shield the short groove 114 from the outside so that the short groove 114 is not exposed to the outside.

This additional rim plate 142a is a standardized short groove 114 using a heat-resistant material or a refractory material that can effectively block external heat from being transferred to the inside of the short groove 114, similar to the main shield plate 132 as described above. ), as long as it can be separately manufactured in a modular form, specific composition components or detailed shapes are not particularly limited.

However, the additional limping plate 142a according to the embodiment of the present invention is at least one of clay, silicate, xiaotezil (acidified at higher temperatures), chromium, alumina (neutralized at high temperatures), and chromiummagnesia (basicized at high temperatures). The main material including one is manufactured and mass-produced in the form of a module by the method of manufacturing refractory bricks or refractory mortar.

At this time, the above-described main material may be appropriately selected and combined according to the composition of the concrete material 110 and the surrounding environment in which the concrete material 110 is poured and used.

The bum part (144a) is formed protruding in a state spaced apart from the additional lim plate (142a) so that the sub-FRP stiffener 122 is located in the inner space 145, or is coupled to the additional lim plate (142a) and the corresponding short groove ( It is a component that is press-fitted and fixed to 114).

In order to specifically implement the functions or actions of the bum part (144a) as described above, the bum part (144a) according to the embodiment of the present invention, as shown in Figure 3 (b) and (b') , A pair of rod members disposed to face each other may be integrally formed with the additional lim plate 142a in a state disposed at predetermined intervals along the length direction of the additional lim plate 142a.

In this way, the additional rim plate (142a) and the part (144a) formed integrally with the sub-FRP reinforcement (122) seated in the spaced space (145) is supported by press-fitting into the step groove (114) in a fixed position, so that the corresponding step groove (114) to form a bond.

Although not shown in the drawing, the bum fitting portion 144a may be implemented in the form of an arrow-shaped fitting portion 134a of the elongated refractory member 130 described above.

The second fireproof member 140b differs only in that it is applied to the first fireproof member 140a and the installation position, that is, the short groove 114 on the side of the adjacent surface 110b, and the first fireproof member 140a As in ), it is made of a modular structure including an additional rim plate 142b and a buoy part 144b, and the detailed description will be replaced with the above-described contents.

Next, referring to FIGS. 2 to 4, a method of manufacturing the fire-finished FRP-reinforced composite concrete 100 according to the present invention will be described in detail.

First, step (a) is formed by cutting a long groove 112 along the longitudinal direction of the reinforcing surface 110a, which is one or more of the outer surfaces of the pre-installed concrete material 110 as shown in FIGS. 2 and 4 Or, it is molded by placing the long groove 112 integrally with the concrete material 110. Here, the long groove 112 may be a groove of a standardized size for reinforcing the bending load in the longitudinal direction of the concrete.

In addition, it is spaced apart from one another in the longitudinal direction of the reinforcing surface 110a, which is one or more of the outer surfaces of the concrete material 110, and a plurality of'"'-type short grooves 114 are arranged along the width direction of the reinforcing surface 110a and the adjacent surface. It can be formed so as to face each other (symmetric or intersecting). These short grooves 114 may be grooves of a standardized size for reinforcing shear loads in multiple directions with respect to the prosthetic concrete material 110 supporting the lower part of the slab (S100).

Next, step (b) is formed by protruding a pair of fitting portions 134 spaced apart from each other in the heat-resistant material main covering plate 132 or combining the fitting portion 134 of a separate material to the main covering plate 132 Thus, the long fireproof member 130 is pre-fabricated in a module shape.

In this case, the fitting portion 134 is a component having a rod shape or an end portion in the insertion direction in an arrow shape 134a, and may be made of metal such as reinforcement or heat-resistant synthetic resin.

Additionally, in order to reinforce the multi-directional shear load of the concrete material 110, the secondary FRP reinforcement 122 is shielded from external heat, so that the secondary FRP reinforcement 122 is fixed to the short groove 114 as if surrounding the secondary FRP reinforcement member 140 ) In a modular form with respect to the standardized short groove 114 using a heat-resistant material or a refractory material that can effectively block external heat from being transmitted to the inside of the short groove 114, similar to the above-described long fire-resistant member 130. It is produced separately.

At this time, the short fireproof member 140 has a plate-shaped first fireproof member 140a made of a heat-resistant material fixed to the short groove 114 on the side of the reinforcing surface 110a (the bottom surface of the concrete material 110), and the adjacent surface It may be composed of a plate-shaped second fireproof member 140b made of a heat-resistant material that is fixed to the short groove 114 on the (110b) side, and, unlike shown, bending corresponding to the secondary FRP stiffener 122 or the short groove 114 It may also be integrally molded in the'"' form. (S200)

Next, step (c) is modularized into a rod shape corresponding to the length of the long groove 112 and can be seated in the inner space 135 of the fitting part 134 formed on the modularized long fireproof member 130 The FRP stiffener 120 is pre-fabricated.

In addition, in order to support and supplement the multi-directional shear load applied to the concrete material 110, the sub-FRP stiffener 122, which is modularized in a shape corresponding to the inner side of the short groove 114, is manufactured.

At this time, the FRP reinforcement 120 and the sub-FRP reinforcement 122 are plastic composite materials (FRP, fiber reinforced) reinforced with glass or carbon fiber, which are high-performance and high-functional materials that are excellent in durability, light weight, corrosion resistance and formability against load. plastics) is molded. (S300)

Next, step (d), after seating the FRP reinforcement 120 in the inner spaced space 135 of the fitting portion 134 formed in the long fire-resistant member 130, the long fire-resistant member 130 is inserted into the long groove 112 After press-fitting and fixing the sub-FRP stiffener 122 on the short fire-resistant member 140, the short fire-resistant member 140 is press-fitted to the short groove 114.

At this time, the press-fitting and fixing work is not performed by repeatedly using fastening means such as bolts and nuts, but simply and quickly by hitting the operator so that the fitting part 134 fits snugly inside the long groove 112. Can be performed (S400)

Finally, in step (e), the epoxy (E) is filled through the open space at both ends of the long groove 112 so that the FRP reinforcement 120 is rigidly fixed. In addition, by filling the epoxy (E) through the space open to the one end side of the short groove 114 in addition, the sub-FRP reinforcement 122 is not separated so that a solid fixation is made.

The application timing of the epoxy (E) bonding to the FRP reinforcement 120 and the sub-FRP reinforcement 122 as described above, prior to step (d) described above, the epoxy (E) in the long groove 112 or the short groove 114 in advance. Although it may be made by applying an appropriate amount, it is preferable to perform a filling or filling method after step (d) for a clean and accurate epoxy (E) bonding with close adhesion. (S500)

In addition, steps (a), (b) and (c) described above are steps that can be performed simultaneously or at different times in a separate or integrated workspace, and each step is not a step that influences or receives each other. , May be performed differently from the stepwise order listed as described above.

In the above, although specific embodiments of the present invention have been described and illustrated, the present invention is not limited to the described embodiments, and 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. Therefore, such modifications or variations should not be individually understood from the technical spirit or viewpoint of the present invention, and the modified embodiments should be said to belong to the claims of the present invention.

100: FRP-reinforced composite concrete with fire-resistant finish
110: concrete 110a: reinforcement surface
110b: proximal surface 112: long groove
112a: step 114: step groove
120: FRP reinforcement 122: sub-FRP reinforcement
E: epoxy
130: long fireproof member 132: main shield plate
132a: part of the main cover 134: fitting part
134a: arrow-shaped fitting portion 135, 145: spaced space
140: short fireproof member 140a: first fireproof member
140b: second fireproof member 142a, 142b: additional rim plate
144a, 144b: booger part

Claims (8)

A concrete material in which a long groove is formed along the longitudinal direction of one or more reinforcing surfaces;
FRP reinforcement which is fixed to the inside of the long groove by epoxy bonding to support and supplement the bending load applied to the concrete material; And
And the FRP reinforcement material is shielded from external heat, including a long fire-resistant member of a heat-resistant material fixed to the elongated groove as if surrounding the FRP reinforcement,
The long fireproof member,
A main shielding plate made of heat-resistant material that covers and shields the long groove while a part of the long groove is inserted into the long groove so that the long groove is not exposed to the outside; And
The FRP reinforcement is formed in a state spaced apart from the main shielding plate so that the FRP reinforcement is located in the inner spaced space, or includes a fitting part that is press-fitted and fixed to the long groove by being coupled to the main shielding plate,
The fitting part,
Fire-resistant finished FRP-reinforced composite concrete, characterized in that the end portion in the insertion direction is formed in an arrow shape so as to be locked to the stepped jaw formed inside the long groove. delete delete A concrete material in which a long groove is formed along the longitudinal direction of one or more reinforcing surfaces;
FRP reinforcement which is fixed to the inside of the long groove by epoxy bonding to support and supplement the bending load applied to the concrete material; And
And the FRP reinforcement material is shielded from external heat, including a long fire-resistant member of a heat-resistant material fixed to the elongated groove as if surrounding the FRP reinforcement,
The concrete material,
A fire-resistant finished FRP-reinforced composite concrete material, characterized in that it is spaced apart in the longitudinal direction of one or more reinforcing surfaces, and a plurality of'"'-shaped short grooves are formed to face each other along the width direction of the reinforcing surface and the adjacent surface. The method of claim 4,
The composite concrete material,
A secondary FRP stiffener that is fixed to the inside of the short groove by epoxy bonding to support and supplement the multidirectional shear load applied to the concrete material; And
A refractory-finished FRP-reinforced composite concrete material comprising a heat-resistant material and a short fire-resistant member fixed to the short groove as if surrounding the secondary FRP reinforcement so that the secondary FRP reinforcement is shielded from external heat. The method of claim 5,
The short fireproof member,
Consisting of a first fire-resistant member of heat-resistant material fixed to the end groove of the reinforcing surface, and a second fire-resistant member of heat-resistant material fixed to the end groove of the adjacent surface,
Each of the first and second fireproof members,
An additional rim plate made of heat-resistant material to cover and shield the short grooves from being exposed to the outside; And fire-resistant finished FRP, characterized in that it comprises a bulging portion that is formed protruding from the additional rim plate in a state spaced apart from the additional rim plate so that the sub-FRP reinforcement is located in the inner spaced space, or is press-fitted to the end groove by being coupled to the additional rim plate. Reinforced composite concrete. (a) forming a long groove along the longitudinal direction of a reinforcing surface that is at least one of the outer surfaces of the installed concrete material or integrally forming the long groove with the concrete material;
(b) protruding a pair of fitting portions spaced apart from each other from the main covering plate of heat-resistant material or combining the fitting portions of a separate object to the main covering plate to pre-fabricate a long fire-resistant member in a module shape;
(c) pre-fabricating an FRP stiffener in a rod shape that can be seated in the inner spaced space of the fitting portion and corresponds to the length of the long groove;
(d) mounting the FRP stiffener in the inner spaced space of the fitting portion and then press-fitting the long fireproof member into the long groove; And
(e) filling the epoxy through the open space at both ends of the long groove,
The step (a) is arranged to be spaced apart in the longitudinal direction of the reinforcing surface, which is at least one of the outer surfaces of the concrete, and forming a plurality of'"'-shaped short grooves to face each other along the width direction of the reinforcing surface and the adjacent surface,
In the step (c), in order to support and supplement the multidirectional shear load applied to the concrete material, a secondary FRP reinforcement is manufactured in a shape corresponding to the inner side of the short groove,
The step (b), so that the secondary FRP reinforcement is shielded from external heat, and a short fireproof member, which is a heat-resistant material, is fixed to the short groove as if surrounding the secondary FRP reinforcement, and
In the step (d), after seating the sub-FRP reinforcement on the short fireproof member, the short fireproof member is press-fitted into the short groove, and
The step (e) further comprises the step of filling an epoxy through a space open at one end side of the short groove.
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