KR20200025346A - Reinforcement method and structure of reinforced concrete member using steel plates and wires - Google Patents

Abstract

According to the present invention, a reinforcement structure of a reinforced concrete member using a steel plate and a wire includes: a reinforced concrete member; wires wound on the outer surface of the reinforced concrete member; wire protecting members into which the wires penetrate and which are positioned at the edge of the reinforced concrete member; both end fastening parts of the wires; and reinforcing plates having protruding insertion parts formed at corresponding positions so as to receive the wires and the wire protecting members therein, thereby effectively exhibiting reinforcing effects by reinforcing materials.

Description

Reinforcement method and structure of reinforced concrete member using steel plate and wires {REINFORCEMENT METHOD AND STRUCTURE OF REINFORCED CONCRETE MEMBER USING STEEL PLATES AND WIRES}

The present invention relates to a reinforcement method and structure of a reinforced concrete member, and more particularly to a reinforcement method and structure of a reinforced concrete member using a reinforced steel sheet and wire.

The structure is damaged or aged by various factors. Therefore, repair and reinforcement are necessary to improve the strength of damaged or aged structures to extend their physical life and to perform their original functions.

In particular, reinforced concrete columns often do not sufficiently use transverse reinforcing bars to properly confine concrete, so that transverse deformation of the columns occurs easily when an earthquake occurs, thereby causing brittle fracture.

There are various reinforcement methods for reinforced concrete structures to compensate for this, but generally, a method of attaching a high ductility member such as a steel sheet to a structure by using an epoxy adhesive method is widely used. This is because the attachment of highly ductile members can delay the damage of concrete under compressive load and lead to the ductile behavior of reinforced concrete structures. This is a great advantage that the construction period is short and can be applied to the structure in use, but there is a problem that peeling and dropping of the reinforcement may occur because the mother and the reinforcement is not an integral state.

As described above, in the prior art, a reinforcing material such as carbon fiber or fiber board is bonded to the reinforced concrete structure in addition to the steel sheet, and a method using an epoxy resin as an adhesive is mainly used. This is because, in the repair and reinforcement art, sufficient reinforcing effect can be obtained by only adhering the reinforcing material to the structure surface with an epoxy adhesive.

However, epoxy, which is used as an adhesive, has a problem that peeling occurs spontaneously due to changes in temperature and environment due to a difference in coefficient of expansion and shrinkage between concrete and a linear expansion coefficient. Therefore, when the adhesive peeling phenomenon of the epoxy occurs before the reinforcing effect of the reinforcing material is exhibited, the biggest problem is that no reinforcing effect by the reinforcing material can be expected at all.

In addition, the reinforcing method for bonding the reinforcing material to the surface of the reinforced concrete structure using an adhesive such as epoxy resin, the step of surface treatment of the adhesive surface of the concrete structure to which the reinforcing material is bonded. This is to increase the adhesion of epoxy and is carried out through more complicated stages than general surface treatment stages. This surface treatment is performed by using grinders and sandpapers, so that a lot of dust is generated. .

In addition, the reinforcing method for bonding the reinforcement to the surface of the reinforced concrete structure using an adhesive such as epoxy resin, the epoxy-based adhesive is injected to a certain thickness, the curing and compression process for the integration of the concrete and the reinforcement. However, not only does it take considerable time to cure epoxy, but also shrinkage occurs in the epoxy. Therefore, it is difficult to directly observe the adhesive interface structure between the structure surface and the reinforcement, it is difficult to determine the crack of the concrete and there is a problem that can not accurately determine whether the reinforcement peeling.

In particular, epoxy-based adhesives are widely known that they have a flammable substance and thus have an environmental problem of generating toxic gases during combustion in a fire. Recently, the social demand for environmentally friendly construction methods have been continuously increased in construction sites, and thus, there is a need for a construction method using environmentally friendly adhesives or members to replace epoxy adhesives.

Korean Patent Registration No. 10-1553205

The present invention has been made in order to solve the problems of the prior art described above, when reinforcing reinforced concrete beams or columns, without using a large amount of an adhesive such as epoxy on the entire adhesive surface to attach the reinforcement to the concrete structure Minimize the use, and by using the bolts and nuts to fasten the structure and reinforcement material, and to provide a construction method and a structure that can effectively exhibit the reinforcement effect by the reinforcement without being affected by the performance and construction state of the adhesive epoxy will be.

In addition, it is possible to form a reinforcement structure with a simple configuration does not require construction expertise, and to provide a reinforcement method and a structure using the same, which is easy to construct effectively in terms of reducing construction time as well as construction time.

The objects of the present invention are not limited to the above-mentioned objects, and other objects that are not mentioned will be clearly understood by those skilled in the art from the following description.

The reinforcement structure of the reinforced concrete member using the steel sheet and wire according to the present invention, the reinforced concrete member; A wire surrounding an outer surface of the reinforced concrete member; A wire protection member penetrated by the wire and positioned at an edge of the reinforced concrete member; Fastening both ends of the wire; And a reinforcement plate having a protruding insertion portion formed at a position corresponding to the wire and the wire protecting member.

In the reinforcement structure of the reinforced concrete member using the steel sheet and wire according to the present invention, the protruding insertion portion may further include an observation unit for identifying the wire.

In the reinforcement structure of the reinforced concrete member using the steel sheet and wire according to the present invention, the wire may be selected from synthetic fiber wire rope, stainless wire rope, coated wire rope, and shape memory alloy wire rope, fastening both ends of the wire The portion can be fastened using one or more of sockets, thimbles, clips, turnbuckles, and eyebolts.

In the reinforcement structure of the reinforced concrete member using a steel sheet and wire according to the present invention, the through plate is further formed in the reinforcing plate is fastened to the bolt connecting the outer surface of the reinforced concrete member and the reinforcing plate through the through hole Can be.

In the reinforcement structure of the reinforced concrete member using a steel sheet and wire according to the invention, the anchor receiving portion is formed on the outer surface of the reinforced concrete member; The through hole of the reinforcing plate is formed at a position corresponding to the position of the anchor receiving portion; An anchor is embedded in the anchor receiving portion; The bolt is fastened to the anchor; The first nut may be fastened to the bolt penetrated through the through hole of the reinforcement plate to fix the reinforcement plate to the outer surface of the reinforced concrete member.

Reinforcement method of the reinforced concrete member using a steel sheet and a wire according to the present invention, forming a protrusion insert that can accommodate the wire and the wire protection member in the reinforcement plate; Wrapping wires on the outer surface of the reinforced concrete member; Passing the wire through a wire protection member; Positioning the wire protecting member at an edge of the reinforced concrete member; Forming fastening portions at both ends of the wire; And fixing the reinforcing plate to the outer surface of the reinforced concrete member so that the wire and the wire protection member are positioned at the protruding insertion part.

In the reinforcement method of the reinforced concrete member using the steel plate and the wire according to the present invention, the protruding insertion portion may further include an observation unit for identifying the wire.

In the reinforcement method of the reinforced concrete member using the steel sheet and wire according to the present invention, the wire may be selected from synthetic fiber wire rope, stainless wire rope, coated wire rope, and shape memory alloy wire rope, fastening both ends of the wire The portion can be fastened using one or more of sockets, thimbles, clips, turnbuckles, and eyebolts.

In the reinforcement method of the reinforced concrete member using the steel sheet and wire according to the present invention, the reinforcing plate is further formed with a through hole is a bolt connecting the outer surface of the reinforced concrete member and the reinforcing plate through the through hole is fastened Can be.

In the reinforcement method of the reinforced concrete member using the steel sheet and wire according to the present invention, the anchor receiving portion is formed on the outer surface of the reinforced concrete member; The through hole of the reinforcing plate is formed at a position corresponding to the position of the anchor receiving portion; An anchor is embedded in the anchor receiving portion; The bolt is fastened to the anchor; The first nut may be fastened to the bolt penetrated through the through hole of the reinforcement plate to fix the reinforcement plate to the outer surface of the reinforced concrete member.

Reinforcement method of the reinforced concrete member using a steel sheet according to the present invention, forming an anchor receiving portion on the outer surface of the reinforced concrete member; Forming a through hole in a reinforcement plate at a position corresponding to the position of the anchor receiving portion; Embedding an anchor in the anchor receiving portion; Fastening a bolt to the anchor; And fixing the reinforcing plate to the outer surface of the reinforced concrete member by passing the bolt through the through hole of the reinforcing plate and fastening the first nut.

The reinforcement method of the reinforced concrete member using the steel sheet according to the present invention further includes, after forming the anchor receiving portion on the outer surface of the reinforced concrete member, forming a first spring receiving portion on the anchor receiving portion. The diameter of the first spring receiving portion may be greater than or equal to the diameter of the anchor receiving portion.

The reinforcement method of the reinforced concrete member using the steel sheet according to the present invention may further include placing a first spring on the first spring receiving portion.

The reinforcement method of the reinforced concrete member using the steel sheet according to the present invention, may further include the step of installing a spring protection unit in the first spring receiving portion.

Reinforcement method of the reinforced concrete member using a steel sheet according to the invention, the step of installing a second spring on the first nut; And installing a second nut on an upper portion of the second spring.

In the reinforcement method of the reinforced concrete member using the steel sheet according to the present invention, the first nut comprises a first fixing groove, the second nut comprises a second fixing groove, one end of the second spring is the first The nut may be positioned in a first fixing groove of one nut, and the other end of the second spring may be located in a second fixing groove of the second nut.

The reinforcement method of the reinforced concrete member using the steel sheet according to the present invention may further include fastening a nut cap to the bolt to surround the first nut, the second spring, and the second nut.

In the reinforcement method of the reinforced concrete member using the steel sheet according to the present invention, a washer may be installed between the reinforcing plate and the first nut.

In the reinforcement method of the reinforced concrete member using the steel sheet according to the present invention, the reinforcement plate may be selected from steel plate, section steel, FRP reinforcement plate.

In the reinforcement method of the reinforced concrete member using the steel sheet according to the present invention, the reinforcement plate may be formed in a single layer, or may be formed in a multilayer structure in which fibers or plastic sheets are laminated.

The reinforced concrete structure including the steel sheet according to the present invention includes: a reinforced concrete member; An anchor receiving portion formed on an outer surface of the reinforced concrete member; A reinforcing plate having a through hole formed at a position corresponding to that of the anchor receiving portion; An anchor embedded in the anchor receiving portion; A bolt fastened to the anchor; And a first nut fastened to the bolt penetrated through the through hole of the reinforcement plate to fix the reinforcement plate to the outer surface of the reinforced concrete member.

The reinforced concrete structure including the steel sheet according to the present invention further includes a first spring receiving portion formed on the anchor receiving portion formed on an outer surface of the reinforced concrete member, and the diameter of the first spring receiving portion is It may be formed larger than or equal to the diameter of the anchor receiving portion.

The reinforced concrete structure including the steel sheet according to the present invention may further include a first spring located at the first spring receiving portion.

In the reinforced concrete structure including the steel sheet according to the present invention, a spring protector may be additionally installed in the first spring receiving portion.

The reinforced concrete structure including the steel sheet according to the present invention includes: a second spring located above the first nut; And a second nut positioned above the second spring.

In the reinforced concrete structure including the steel sheet according to the present invention, the first nut includes a first fixing groove, the second nut includes a second fixing groove, and one end of the second spring is formed of the first fixing groove. The nut may be positioned in a first fixing groove of one nut, and the other end of the second spring may be located in a second fixing groove of the second nut.

The reinforced concrete structure including the steel sheet according to the present invention may further include a nut cap fastened to the bolt to surround the first nut, the second spring, and the second nut.

In the reinforced concrete structure including the steel sheet according to the present invention, a washer may be installed between the reinforcing plate and the first nut.

In the reinforced concrete structure including the steel sheet according to the present invention, the reinforcement plate may be selected from steel plate, section steel, FRP reinforcement plate.

In the reinforced concrete structure including the steel sheet according to the present invention, the reinforcement plate may be formed of a single layer, or may be formed of a multilayer structure in which fibers or plastic sheets are laminated.

Reinforcement method of the reinforced concrete member using the improved steel sheet and / or wire of the present invention and the reinforcing structure using the same has the following effects.

First, by appropriately restraining the ductility lacking concrete can lead to improved ductility and strength performance of the reinforced concrete member.

Second, by introducing an external stress using a wire it is possible to secure the weight reduction and durability improvement of the steel sheet reinforcement than conventional steel sheet reinforcement method.

Third, compared to the conventional steel sheet reinforcement method using the epoxy-based adhesives, the difficulty of the operation is low and does not require construction expertise, so even non-experts can easily construct, thereby securing economical efficiency in terms of construction cost.

Fourth, since the epoxy-based adhesive is not used, it is possible to improve the environmental problem that the epoxy generates toxic gases while burning in the event of fire.

Fifth, by fastening the structure and the reinforcement using the bolt and nut, it is possible to effectively exert the reinforcement effect by the reinforcement without being affected or dependent on the adhesive force by the adhesive, that is, the adhesive performance, and the adhesive construction state.

The effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a view showing an example of how the reinforcement method of the reinforced concrete member using a steel sheet and wire according to an embodiment of the present invention is applied to the structure.
2 is a reinforcement method and a reinforcing structure of a reinforced concrete member using a steel sheet and wire, according to an embodiment of the present invention, the wire is installed on the outer surface of the reinforced concrete member and a protrusion insert for receiving the protruding wire is formed Exemplary drawing showing a reinforcement plate.
3 is a view showing an example in which the reinforcement plate is installed on the outer surface of the reinforced concrete member in the reinforcement method and reinforcing structure of the reinforced concrete member using a steel sheet and wire according to an embodiment of the present invention.
4 is a view showing an example in which the reinforcement method of the reinforced concrete member using a steel sheet is applied to the structure according to another embodiment of the present invention.
5 is a view showing the anchor receiving portion and the anchor formed on the outer surface of the reinforced concrete member in the reinforcement method and reinforcing structure of the reinforced concrete member using a steel sheet according to another embodiment of the present invention.
6 is a reinforcement method and a reinforcing structure of a reinforced concrete member using a steel sheet according to another embodiment of the present invention, the anchor concrete member anchored in the anchor receiving portion and the anchor receiving formed on the outer surface of the reinforced concrete member Exemplary view showing a reinforcing plate having a through hole formed at a position corresponding to a negative position.
7 is a view showing a configuration in which the elastic member is arranged in the anchor in the reinforcement method and the reinforcing structure of the reinforced concrete member using a steel sheet according to another embodiment of the present invention.
8 is a view illustrating a configuration in which a bolt and a nut, an elastic member, and a nut cap for preventing nut loosening are exemplarily arranged in a reinforcement method and reinforcement structure of a reinforced concrete member using a steel sheet according to another embodiment of the present invention. drawing.
9 is a view showing an example of how the reinforcement method of the reinforced concrete member using a steel sheet is applied to the structure according to another embodiment of the present invention.
10 is a view showing an example of how the reinforcement method of the reinforced concrete member using a steel sheet and wire according to another embodiment of the present invention is applied to the structure.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of this embodiment, the same name and the same reference numerals are used for the same configuration and additional description thereof will be omitted.

In order to explain the technical idea of the present invention, the accompanying drawings are partially enlarged and reduced in size, not illustrated in scale.

The present invention relates to a reinforcement method and structure in consideration of the damaged state of concrete. As follows, we will improve the structural and economical efficiency by applying the appropriate reinforcement method and structure in each stage of damage classified according to the concrete crack state proposed by the Korean Institute of Architecture.

Concrete Design Criteria, Condition Evaluation by Concrete Cracking (2007. 12) Damage crack Deterioration and damage 1 direction crack 2-way crack One Crack width less than 0.1 mm Mesh crack width
Less than 0.1 mm none 2 Crack width 0.1 ~ 0.3 mm
Crack rate less than 2% Mesh crack width
0.1 to 0.3 mm Surface damage area less than 2% 3 Crack width 0.3 ~ 0.5 mm
Crack Rate 2 ~ 10% Mesh crack width
0.3 mm or more 1. Surface damage area less than 2 ~ 10%
2. Corrosion damage area less than 2%
3. Deck plate peeling and leakage 4 Crack width 0.5 ~ 1.0 mm
10-20% crack rate Delamination of Concrete due to Advances in Mesh Cracks 1. Surface damage area 10% or more
2. Bare exposure damage area 2% or more
3. Deck plate peeling is severe and corrosion occurs due to leakage. 5 Crack width 1.0 mm or more
20% or more crack rate Due to severe peeling due to reticular cracks, punching failure may occur When the cross section of the rebar is severely reduced due to corrosion and the safety of the bottom plate is lowered

More specifically, the present invention proposes a reinforcement method of a crimping method using a bolting method and a crimping method using a wire. Preferably, the crimping method using a bolting method is used in the case of the damaged state 1 to 3 steps, and the damaged state 4 and 5 step. It is proposed to apply a crimping method using a wire. However, the crimping method using the bolting and the crimping method using a wire may be widely applied as necessary, and may be applied together, as will be understood by those skilled in the art.

Hereinafter, an embodiment of the reinforcement method of the reinforced concrete member using the steel plate and the wire of the present invention will be described with reference to FIGS. 1 to 3.

1 is a view showing an example of how the reinforcement method of the reinforced concrete member using a steel sheet and wire according to an embodiment of the present invention is applied to the structure. 2 is a reinforcement method and a reinforcing structure of a reinforced concrete member using a steel sheet and wire, according to an embodiment of the present invention, the wire is installed on the outer surface of the reinforced concrete member and a protrusion insert for receiving the protruding wire is formed 3 is an exemplary view showing a reinforcement plate, and FIG. 3 illustrates a state in which a reinforcement plate is installed on an outer surface of a reinforced concrete member in a reinforcement method and reinforcement structure of a reinforced concrete member using a steel sheet and a wire according to an embodiment of the present invention. The figure shows an example.

As shown in Figure 1, the concrete structure 10 by the reinforcement method of the reinforced concrete member using the steel sheet and wire of the present invention is a wire 11, a wire protection member for confining the reinforced concrete member 100 12, the wire fastening portion 13, the reinforcing plate 200, and the protrusion inserting portion 201 may be configured to be included.

1 to 3, the reinforced concrete member 100 was described as an example of a rectangular reinforced concrete column. However, the reinforced concrete member 100 is not limited to the pillar, and may include all of the reinforced concrete members of various forms such as reinforced concrete beams or slabs.

As such, the wire 11 may be installed on an outer surface of the reinforced concrete member 100 such as a pillar, beam, or slab that requires repair and reinforcement according to the present invention. The wire 11 may be reinforced by restoring deformation or stress of an existing structure, and may constrain concrete to delay damage of the concrete and induce ductile behavior to induce improvement in bearing performance. In addition, depending on the shape of the concrete member 100, by installing the wire 11 can be improved tensile performance.

The wire 11 of the present invention may be a member made of a general wire rope, that is, a wire gathered into strands and wound at a constant pitch around a core. It may also be a wire made of a shape memory alloy.

As the wire 11 is wrapped around the reinforced concrete member 100 and fastened at both ends, the wire 11 is tensioned, and post-tension is introduced into the reinforced concrete member 100.

In one embodiment of the present invention, the wire 11 may be installed so as to surround the circumferential reinforced concrete member 100 as shown in FIG.

More specifically, in one example of the present invention, the wire protection member 12 may be installed including the wire protection member 12 to prevent breakage of the wire 11 from occurring at the edge of the reinforced concrete member 100. The wire protection member 12 is formed in an L shape, and is perforated to allow the wire 11 to penetrate therein. By installing the wire protection member 12, the edge of the reinforced concrete member 100 and the wire 11 may be prevented from directly contacting each other, thereby preventing the wire 11 from being damaged or broken by abrasion by the edge.

Therefore, while the wire 11 penetrates inside the wire protection member 12 and surrounds the wire 11 to surround the reinforced concrete member 100, the wire protection member 12 is installed at each corner. After that, by fastening by fixing both ends of the wire 11 is installed so that the wire 11 does not slip in the position surrounded by the reinforced concrete member 100.

In this case, both ends of the wire fastening portion 13 installed at both ends of the wire 11 to fasten both ends of the wire 11 may use a terminal processing and a fastening method of a wire rope generally known. For example, it may be fastened using a device such as a socket, thimble, clip, turnbuckle, eye bolt, or the like.

Then, the reinforced concrete member 100 provided with the wire 11 is covered with a reinforcing plate 200. In this case, the reinforcing plate 200 may be formed in a shape corresponding to the shape of the reinforced concrete member 100. That is, the protrusion inserting portion 201 is located at a position corresponding to a portion where the wire 11 and the wire protecting member 12 are positioned to include a space for accommodating the wire 11 and the wire protecting member 12. Can be formed. The wire 11 and the wire protection member 12 are positioned in the protruding insertion portion 201, thereby the close contact between the reinforcement plate 200 and the reinforced concrete member 100 and the reinforcement plate 200 and the wire 11 and The close contact with the wire protection member 12 can be achieved at the same time effectively.

In particular, FIG. 1 shows the wire 11 and the wire protection member 12 when the reinforcing plate 200 is positioned on the outer surface of the reinforced concrete member 100 in which the wire 11 is surrounded, according to an embodiment of the present invention. ), A cross-sectional view showing the shape of the wire fastening portion 13 and the reinforcing plate 200 in detail, and more specifically, a cross-sectional view at a portion where the protrusion inserting portion 201 of the reinforcing plate 200 is located. As shown in FIG. 1, the protrusion inserting portion 201 may accommodate a wire 11, a wire protecting member 12, and a wire fastening portion 13.

In addition, the protrusion 202 may be additionally formed with an observation unit 202. The observation unit 202 is made of a high-strength plastic having high light transmittance in the through hole formed in the protrusion insertion unit 201 or the protrusion insertion unit to observe the inside of the reinforcing plate. The state of the wire 11 and the state of fastening, and more preferably, the state of fastening at the both ends of the wire fastening part 13 can be visually observed. In the conventional steel plate reinforcement method, the reinforcing structure provided in the reinforced concrete member 100 is used. Even if deformation, separation, peeling, etc. occur, the internal structure cannot be visually checked, so it is difficult to determine the state of the reinforcing structure, and in order to check the state, some or all of the reinforcing structure, for example, the reinforcing plate 200 must be removed. There was a problem. In addition, in the conventional reinforcement method, it is difficult to form a separate through hole in the reinforcement plate 200 because the reinforcement performance is determined by the adhesion and adhesion of the reinforced concrete member 100 and the reinforcement plate 200.

However, in the present invention, the reinforced concrete member 100 is reinforced using the wire 11, and the reinforcing performance of the protrusion inserting portion 201 for accommodating the wire 11 is complementary, so that the protrusion inserting portion 201 is provided. Even if the observation portion 202 is formed on the upper side, the fastening state, deformation, and the like of the wire 11 can be visually checked without causing a large decrease in the reinforcing performance.

Therefore, in FIGS. 1 to 3, the observation unit 202 is illustrated as being formed on the reinforcing plate 200 coupled to one surface of the reinforced concrete member 100 on which the wire coupling ends 13 are positioned. It will be appreciated by those skilled in the art that 202 is not limited to the form, size, number, location, etc., but can be variously modified as necessary.

As shown in FIG. 1, the reinforcement plate 200 may be installed at each surface of the reinforced concrete member 100.

Therefore, in one embodiment of the present invention, the reinforcement plate 200 is fastened in a bolting manner with the reinforced concrete member 100 corresponding to the reinforcement plate 200, the reinforcement plate 200 and the reinforced concrete member 100, The wire 11, the wire protection member 12, and the wire fastening portion 13 may be integrated.

Hereinafter, an embodiment of the reinforcement method of the reinforced concrete column using the bolting method of the present invention will be described with reference to FIGS. 4 to 6. Hereinafter, to clearly explain the configuration of the bolting fastening method, the drawings and detailed description of the reinforcement configuration using the wire as described above have been omitted. However, it will be understood by those skilled in the art that the above-described configuration of the bolting fastening method may be applied together to the above-described configuration using the wire.

4 is a view showing an example in which the reinforcement method of the reinforced concrete member using a steel sheet is applied to the structure according to another embodiment of the present invention. 5 is a view showing the anchor receiving portion and the anchor formed on the outer surface of the reinforced concrete member in the reinforcement method and reinforcing structure of the reinforced concrete member using a steel sheet, according to another embodiment of the present invention, Figure 6 In the reinforcement method and reinforcing structure of the reinforced concrete member using a steel sheet according to another embodiment of the present invention, the position of the anchor concrete portion and the anchor receiving portion formed on the outer surface of the reinforced concrete member anchored in the anchor receiving portion The drawing shows an example of a reinforcing plate formed with a through hole at a position corresponding to.

As shown in Figure 4, the concrete structure 20 by the reinforcement method of the reinforced concrete member using a steel sheet of the present invention is a reinforced concrete member 100, reinforcement plate 200 and anchors 110, bolts (fastening them) 120 and the first nut 130 may be configured.

4 to 6 illustrate the reinforced concrete member 100 as an example of a rectangular reinforced concrete column. However, the reinforced concrete member 100 is not limited to the pillar, and may include all of the reinforced concrete members of various forms such as reinforced concrete beams or slabs.

As described above, an anchor receiving portion 101 may be formed on the outer surface of the reinforced concrete member 100 such as a pillar, beam, or slab that requires repair and reinforcement according to the present invention. . The anchor receiving portion 101 is formed by digging a groove on the surface of the reinforced concrete member 100. An anchor 110 is embedded in the anchor receiving portion 101 formed on the outer surface of the reinforced concrete member 100.

In general, anchors (anchor) is a device that is constructed to fix the skin complexes on the concrete structure, can be fixed by coupling the skin complexes to the parts exposed to the outside of the concrete after the hole is installed in the concrete and then anchored with a nut Do.

The anchor of the present invention can be used in various types of anchors known in the art, for example, chemical anchors, set anchors, all anchors, wedge anchors, frame anchors ( frame anchors, sleeve anchors, strong anchors, drop anchors, and the like.

In one embodiment of the present invention, the anchor receiving portion 101 may be formed on the outer surface of the rectangular reinforced concrete member 100 as shown in FIG.

More specifically, in one example of the present invention, two anchor receiving portions 101 may be formed on one surface of the reinforced concrete member 100. In addition, the number of the anchor receiving portion 101 formed on one surface may be variously selected depending on the degree of reinforcement, depending on the concrete crack state. That is, when the surface area of the structure to be reinforced is wide, the number of anchor receiving portions 101 may be sufficiently increased so that the reinforcing plate 200 attached to the reinforced concrete member 100 may be selected to be stably attached. For example, as shown in Figures 5 and 6, it can be installed while increasing the number of the anchor receiving portion 101 in the vertical direction of the pillar on one surface of the reinforced concrete member 100 of the square pillar.

In addition, the anchor receiving portion 101 may be formed on all four sides of the reinforced concrete member 100 as shown in FIG. However, depending on the crack state and shape of the concrete to be reinforced, the degree of reinforcement can be formed on only one side, can be formed on two sides facing each other, can be formed on two sides adjacent to the corner, the three sides It may be.

Conventional iron plate reinforcement method using the epoxy is excellent in the reinforcement effect in that it uses a steel plate as a reinforcing material, there is a problem that the reinforcing effect is significantly reduced when the epoxy injection step is complicated and the epoxy is not sufficiently injected. In addition, when the thickness of the cross section of the reinforcement is improved to improve the reinforcement effect, the epoxy injection thickness must be increased together to withstand the increased weight of the reinforcement. Therefore, an increase in the amount of epoxy and an increase in the thickness of the adhesive layer rather than the reinforcement are essential. It was.

In addition, in the conventional reinforcement method using epoxy as an adhesive, it is necessary to inject the epoxy between the structure and the reinforcement to prevent the epoxy from leaking. For example, it is necessary to install a separate inlet for epoxy injection while putting a reinforcement plate on the slope of the column and sealing the periphery plate with a separate sealing work or welding between steel sheets to prevent the leakage of epoxy. Complex and skilled skills were required.

However, in the present invention, since the epoxy is not injected between the reinforced concrete structure and the reinforcement plate which is the reinforcing material, since the edge sealing operation and the welding process are not performed as in the prior art, the difficulty of the operation is low and the unskilled person can also be easily constructed. In addition, since the adhesive is not used, even when the thickness of the reinforcing material is to be increased, it is not necessary to consider the increase in the amount of the adhesive used.

At this time, the depth of the anchor receiving portion 101 is determined according to the effective depth that the anchor 110 and the bolt 120 used for fixing the reinforcing plate 200 can act effectively, the anchor receiving portion 101 ) Diameter is also determined by the effective diameter on which anchor 110 and bolt 120 can act effectively. The size, length, thickness, etc. of the anchor 110 and the bolt 120 are determined according to the crack state of the concrete, the degree of reinforcement, and the size, weight, etc. of the reinforcement plate 200 to be attached.

In addition, the depth of the anchor receiving portion 101 may be constructed to be deeper than the length of the anchor 110 in order to cope with external impact.

Before and after embedding the anchor 110 in the anchor receiving portion 101 in order to increase the fixing force, attachment force, etc. of the anchor 110 to the reinforced concrete member 100, between the anchor receiving portion 101 and the anchor 110 An adhesive (for example, an epoxy adhesive) and grouting material may be additionally injected into the.

For example, after the anchor receiving portion 101 is formed, an anchor 110 may be installed after the adhesive is injected into the anchor receiving portion 101, and the bolt 120 is fastened to the anchor receiving portion 101. Before the adhesive may be injected into the female threaded portion inside the anchor 110, the bolt 120 may be fastened. That is, the adhesive may be filled between the anchor receiving portion 101 and the anchor 110 formed in the reinforced concrete member 100 and between the anchor 110 and the bolt 120.

The through hole 210 is formed in the reinforcing plate 200 at a position corresponding to the position of the anchor receiving portion 101. The reinforcing plate 200 is fixed to the reinforced concrete member 100 by penetrating the bolt 120 through the through hole 210 and tightening the first nut 130.

Since the present invention does not use an epoxy adhesive between the concrete structure and the reinforcement, it is not necessary to separate the reinforcement from the concrete structure in order to inject epoxy so that the reinforcement and the concrete structure can be directly and tightly fixed. In addition, the problem of the prior art that the brittle fracture of the concrete structure occurs before the epoxy adhesive interface layer is peeled off and the reinforcing material exerts the reinforcing performance can be solved through the bolting compression method of the present invention.

However, if the bolting crimping method is used in this way, the bolt should be able to be firmly fixed to the structure without loosening. In particular, the vibration 110, including the earthquake, and when the expansion and contraction of the concrete to prevent the anchor 110 embedded in the concrete structure 20 to escape from the anchor receiving portion 101, the reinforcement plate 200 and the reinforced concrete member Bolts 120 and the first nut 130, the main role of fixing the 100 should not be released. Therefore, the present invention is characterized by including a spring, which is an elastic structure, in the reinforcing structure for such a function.

Hereinafter, with reference to Figures 7 to 9 will be described embodiments of the reinforcement method of the reinforced concrete column using the steel sheet of the present invention including a spring.

FIG. 7 is a view showing an example in which an elastic member, that is, a spring is arranged in an anchor in a reinforcement method and a reinforcement structure of a reinforced concrete member using a steel sheet according to another embodiment of the present invention. 8 is a view illustrating a configuration in which a bolt and a nut, an elastic member, and a nut cap for preventing nut loosening are exemplarily arranged in a reinforcement method and reinforcement structure of a reinforced concrete member using a steel sheet according to another embodiment of the present invention. Drawing. 9 is a view showing an example in which the reinforcement method of the reinforced concrete member using a steel sheet is applied to the structure according to another embodiment of the present invention.

As shown in Figure 7, the concrete structure 30 by the reinforcement method of the reinforced concrete member using the steel sheet of the present invention is a reinforced concrete member 100, reinforcement plate 200 and anchors 110, bolts (fastening them) 120, a first nut 130, and a first spring 140.

In FIG. 7, an example of using an anchor having a female threaded portion formed therein as an example of an anchor is illustrated. Therefore, it is possible to fix the reinforcement plate by fastening a separate bolt, for example, a computer bolt to the female screw thread. If a bolt is pre-fastened or integrally formed with an anchor (for example, an anchor bolt), the bolt provided with the anchor may be used or the bolt provided may be replaced. Another bolt may be used to carry out the reinforcement process of the present invention.

 Therefore, according to the type of anchor used, it is also possible to use a bolt 120 that is fastened to the anchor 110 in advance, such as an anchor bolt, or a separate bolt 120 that meets the standard of the anchor 110, for example It will be understood by those skilled in the art that a computer bolt may be used.

Hereinafter, for the sake of clarity, a direction in which the anchor 110 is embedded in the anchor receiving portion 101 is referred to as a downward direction (lower, lower) of the anchor or bolt, and the bolt 120 coupled to the anchor 110 is used. ) Will be described as the direction (upper, upper) of the anchor or bolt connected to the reinforcing plate 200.

The first spring 140 is installed on the outer circumference of the bolt 120 at the top of the anchor 110. The first spring 140 may be installed after embedding the anchor 110 or after fastening the bolt 120 to the anchor 110. That is, the first spring 140 is first placed on the reinforced concrete member 100 before the reinforcing plate 200 is fastened to the bolt 120. Then, the reinforcing plate 200 is fastened to tighten the first nut 130 so that the first spring 140 abuts on the reinforcing plate 200.

The first spring 140 is located inside the reinforced concrete member 100, and the reinforcement plate is attached to the reinforced concrete member 100 as a reinforcing material to the reinforced concrete member 100 and the expansion and contraction force of the concrete and the expansion and contracting force of the concrete Can be effectively delivered to 200. As such, the first spring 140 is in close contact with the reinforcement in the concrete, so that the force and vibration acting on the concrete structure are absorbed by the elastic member and transmitted to the reinforcement, thereby improving the reinforcement effect by the reinforcement.

In addition, the first spring 140 may disperse the force received by the anchor 110 embedded in the reinforced concrete member 100. The anchor 110 and the bolt 120 embedded in the reinforced concrete member 100 is continuously received due to the vibration, impact, expansion, contraction, etc. of the concrete, which is due to the anchor 110 and the bolt 120 The coupling between the concrete members 100 may be loosened. The force is absorbed and dispersed by the first spring 140, which is an elastic member. Therefore, it is possible to prevent the anchor 110 and the bolt 120 from being suddenly released or broken by an external force such as vibration, so that the reinforcement plate 200 is separated from the reinforced concrete member 100.

In order to install the first spring 140 having such an effect, the anchor receiving portion 101 is formed on the outer surface of the reinforced concrete member 100 and the first spring receiving portion (1) is formed on the anchor receiving portion 101. 102 may be further formed. In this case, the diameter d _s1 of the first spring receiving portion 102 may be greater than or equal to the diameter d _a of the anchor receiving portion 101. Therefore, in an embodiment of the present invention, when the anchor receiving portion 101 is formed, the reinforced concrete member 100 is formed by the length of the embedding length L of the anchor 110 and the length l of the first spring 140. The groove is excavated from the outer surface, and the diameter is formed to a size that can accommodate the anchor 110 (d _a ), the diameter (d _s1 ) of the first spring receiving portion 102 of the anchor receiving portion 110 In the case where the diameter d _a is to be greater than the diameter d _a , the first spring is formed by the length l of the first spring 140 from the outer surface of the reinforced concrete member 100 at the position where the anchor receiving portion 110 is formed. A groove _{equal to} the diameter d _s1 of the accommodation portion 102 may be further formed.

The size, ie diameter, thickness, and length of the first spring 140 may be appropriately selected as necessary.

In addition, since the bolt 120 is installed to penetrate the inside of the first spring 140, the bolt 120 serves as a guide for preventing the first spring 140 from bending or bending.

In addition, a first spring protection part 170 may be added to the first spring receiving part 102. The first spring protector 170 is to prevent foreign substances such as concrete fragments from being caught in the first spring 140, and is a cylindrical member installed to match the diameter of the first spring receiving unit 102 or to concrete. It may be a coating layer coated with the paint used.

Installed through the inner diameter of the first spring 140 to the bolt 120 and then through the through hole 210 of the reinforcing plate 200 with the bolt 120 to the reinforcing plate 200 to the reinforcing bar It is fixed to the concrete member 100. When there are a plurality of through holes formed in one reinforcing plate 200, the reinforcing plates are positioned such that the plurality of through holes are fastened to bolts corresponding to the plurality of through holes.

The reinforcing plate 200 may be an iron plate, a steel sheet used in a general iron plate reinforcement method. However, the present invention is not limited thereto, and steel materials that can be attached to concrete for repair and reinforcement of concrete structures, such as shaped steel (H type, L type, etc.) and FRP reinforcement plates (for example, carbon fiber plates, aramid fiber plates, and glass fiber plates). It may include. In addition, the weight, size, thickness, etc. of the reinforcement may be determined according to the degree of damage of the concrete structure, and the degree of reinforcement thereto.

Therefore, the reinforcing plate 200 may be formed of one single layer or may be formed of one or more multilayer structures according to the degree of reinforcement. If necessary, it may be formed into a structure in which functional fibers or plastic sheets (eg, carbon fibers, aramid fibers, glass fibers, etc.) are laminated together.

The first nut 130 is fastened to the bolt 120 to fasten the reinforcing plate 200 positioned on the outer surface of the reinforced concrete member 100, and the first nut 130 is tightened.

A washer (not shown) may be included between the first nut 130 and the reinforcement plate 200 to prevent the nut from loosening. For example, washers such as flat washers, spring washers, rubber washers and the like can be used.

In general, in the fastening method using the bolt and nut, the elasticity is lost due to the yielding of the material, or the space is generated due to the vibration of the fastening structure and parts, the friction force between the bolt and the nut may be reduced, the loosening may occur. In order to prevent an accident from occurring due to such loosening phenomenon, in the prior art, a method of fixing a bolt and a nut by injecting an adhesive is used, but when the nut needs to be dismantled for maintenance, a nut must be destroyed. .

Reinforcement method and structure according to an embodiment of the present invention to install a second spring 150 and the second nut 160 in the upper portion of the first nut 130 to prevent the loosening phenomenon while convenient installation. It features. The configuration of such an embodiment will be described below with reference to FIGS. 8 and 9.

As shown in Figure 8, the concrete structure 40 by the reinforcement method of the reinforced concrete member using the steel sheet of the present invention is a reinforced concrete member 100, reinforcement plate 200 and anchors 110, bolts (fastening them) 120, a first nut 130, a first spring 140, a second spring 150, and a second nut 160.

FIG. 9 is an exploded perspective view exemplarily illustrating how the configuration of FIG. 8 is applied to a structure. The reinforced concrete member 100, the reinforcement plate 200, and the anchor 110 and the bolts fastening the same as illustrated in FIG. 8. 120, the first nut 130, the first spring 140, the second spring 150, the second nut 160, and the nut reinforcement method of the embodiment including the nut cap 300 is a structure as shown in FIG. Can be applied to

FIG. 8 relates to an embodiment in which the second spring 150, the second nut 160, the nut cap 300, and the like are added to the above-described configuration in FIG. 7. And descriptions thereof will be omitted. Similarly, it will be understood that the manner in which the reinforcement method and configuration of FIG. 7 is applied to concrete structures can be applied in a manner similar to the exploded perspective view of FIG. 9 for the configurations indicated by the same reference numerals in FIGS. 7 to 9.

The first nut 130 is fastened to the bolt 120, and the second spring 150 and the second nut 160 are sequentially positioned on the bolt 120 protruding upward from the first nut 130. Let's do it. At this time, as in the first spring 140, because the bolt 120 is installed through the inside of the second spring 150, the bolt 120 is to prevent the second spring 150 is bent or bent Serve as a guide.

The second spring 150 is positioned between the first nut 130 and the second nut 160 so that one end of the second spring 150 abuts the first nut 130 and the second spring is in contact with the second spring 150. The other end of the 150 is positioned in contact with the second nut 160. The first fixing groove 131 and the second fixing groove 161 are formed in the first nut 130 and the second nut 160, respectively, and the second spring 150 is formed in the fixing grooves 131 and 161. Both ends of the) are positioned in a shape that is respectively seated.

In one example of the present invention, when the first nut 130 rotates in the unwinding direction, the second spring 150 having one end positioned in the first fixing groove 131 of the first nut 130 rotates in the unwinding direction. In other words, the second spring 150 may be installed to relax. Therefore, one end contacting the first nut 130 by the release energy acting in the direction in which the first nut 130 is released, that is, the lower end portion of the second spring 150 opens in the second spring 150. If it is to rotate, the other end in contact with the second fixing groove 161 of the second nut 160, that is, the upper end of the second spring 150 between the second nut 160 and the second spring 150 As the rotation of the second nut 160 is prevented by the frictional force acting on the second nut 160, the release energy is again caused by the restoring force of the second spring 150 that is rotated or partially rotated in the unwinding direction. The second spring 150 may be transferred along the direction of being retracted to prevent the first nut 130 from being loosened.

Therefore, the second spring 150 prevents the first nut 130 from being loosened by vibration or the like by pressing the first nut 130 from the upper portion of the first nut 130. In addition, since the second spring 150 absorbs vibration transmitted through the reinforcing plate 200, the bolt 120, and the nuts 130 and 160 to the elastic member and simultaneously presses the upper portion of the first nut 130. When the first nut 130 is used alone, the friction force is increased to prevent rotation of the first nut 130.

In addition, the nut cap 300 may be additionally installed to prevent the bolt 120 and the first and second nuts 130 and 160 from being rotated and physically fixed. The nut cap 300 is formed to accommodate the first and second nuts 130 and 160, the second spring 150, and the bolt 120.

The nut cap 300 may also block moisture, dust, and the like from an external environment to prevent the bolt 120, the first and second nuts 130 and 160, and the second spring 150 from being rusted. . As such, the life extension effects of the bolt 120, the nuts 130 and 160, and the second spring 150 may be maximized.

According to the reinforcement method and the reinforcing structure of the present invention, welding, adhesive use, etc. are minimized, so that it is easy to maintain and repair the reinforcing structure even after reinforcement. That is, since the reinforcement plate 200 is welded or between the reinforcement plate 200 and the concrete member 100 is not bonded with epoxy, the nut cap 300 is detached from the reinforcement structure at any time, if necessary, to the first structure. And maintains and replaces only a part of the reinforcing structures such as the second springs 140 and 150, the first and second nuts 130 and 160, the bolts 120, and the reinforcing plate 200, which have a problem. Management costs can also be reduced.

In particular, the bolts and nuts may be expanded or contracted not only by vibrations such as earthquakes but also by temperature changes in the surroundings, thereby causing a screw loosening phenomenon. However, according to the reinforcement method and the reinforcing structure of the present invention, it is easy to maintain and repair, and thus it is possible to retighten bolts and nuts without dismantling the entire reinforcing structure.

In the above, various embodiments of the compression method using the bolting method and the wire method using the present invention have been described above. However, the various bolting, wire crimping method described above can be applied as one reinforcement method and structure, which is shown in FIG.

10 is a combination of various embodiments of the present invention, the wire crimping method of FIGS. 1 to 3 and the bolting crimping method of FIGS. 8 to 9 are applied together, the detailed description of each embodiment and the detailed decomposition of FIG. Referring to the perspective view, the configuration and reinforcement method of the present embodiment will be fully understood by those skilled in the art.

At the position of the reinforcement plate 200 corresponding to the portion in which the wire 11 is enclosed in the reinforced concrete member 100, a protrusion inserting portion 201 is formed, and the reinforced concrete member 100 in which the wire 11 is not enclosed. The anchor insertion portion 101 is formed and a through hole 210 is formed at the position of the reinforcement plate 200 corresponding thereto, so that the bolting compression is performed through the reinforcement plate 200 so that the reinforcement concrete member 100 is formed. Settled).

At this time, each of the reinforcing plate 200 is attached to each of the outer circumferential surface of the reinforced concrete member 100 by using a bolt fastening method, so that the excess between the reinforcing plate 200 and the reinforced concrete member 100 to attach It is not necessary to use an epoxy adhesive or face weld between the reinforcing plate 200 and the reinforcing plate 200 at the corners.

In the prior art, when a steel plate is to be attached from each side, such as a concrete column, a method of separately welding the steel plate and the steel plate at the corners of the column without bolting the column and the steel plate is used. The surface welding between the steel sheet and the steel sheet takes a considerable time, and there is a disadvantage that the quality change of the welded portion is very large according to the skill of the worker. In particular, in the case of steel plate reinforcement, CO ₂ welding is performed with high strength rather than general welding to improve reinforcing performance. Such CO ₂ gas welding has a constant welding rate and high tensile strength compared to arc welding. The major disadvantage is that the construction cost and time increase because of the demand.

However, in the present invention, since the concrete column and the reinforcement plate are fastened using a bolting crimping method, not only construction convenience is improved, but also the quality fluctuation range according to the working skill is small, so that a certain level or more strength can be expected.

As described above, a preferred embodiment according to the present invention has been described, and the fact that the present invention can be embodied in other specific forms in addition to the above-described embodiments without departing from the spirit or scope thereof has ordinary skill in the art. It is obvious to them. Therefore, the above-described embodiments should be regarded as illustrative rather than restrictive, and thus, the present invention is not limited to the above description and may be modified within the scope of the appended claims and their equivalents.

10, 20, 30, 40, 50: concrete structure
11: wire
12: wire protection member
13: wire both ends
100: reinforced concrete member
101: anchor receiving portion
102: first spring receiving portion
110: anchor
120: bolts
130: first nut 131: first fixing groove
140: first spring
150: second spring
160: second nut 161: second fixing groove
170: first spring protection
200: gusset
201: protrusion insert
202: observation unit
210: through hole
300: nut cap

Claims (10)

Reinforced concrete member;
A wire surrounding an outer surface of the reinforced concrete member;
A wire protection member penetrated by the wire and positioned at an edge of the reinforced concrete member;
Fastening both ends of the wire; And
A reinforcement plate having a protrusion insertion portion formed at a position corresponding to the wire and the wire protection member;
Reinforcement structure of the reinforced concrete member using a steel sheet and a wire comprising a. The method of claim 1,
Reinforcing structure of the reinforced concrete member using a steel plate and a wire, characterized in that the protrusion inserting portion further comprises an observation to identify the wire. The method of claim 1,
The wire is selected from synthetic fiber wire rope, stainless wire rope, coated wire rope, and shape memory alloy wire rope, and both ends of the wire are fastened using at least one of a socket, a thimble, a clip, a turnbuckle, and an eye bolt. Reinforcement structure of the reinforced concrete member using a steel sheet and a wire. The method of claim 1,
The reinforcing plate of the reinforced concrete member using a steel plate and a wire, characterized in that the through-hole is further formed through the through-hole through the bolt connecting the outer surface of the reinforced concrete member and the reinforcing plate through the through hole. The method of claim 4, wherein
An anchor receiving portion is formed on an outer surface of the reinforced concrete member;
The through hole of the reinforcing plate is formed at a position corresponding to the position of the anchor receiving portion;
An anchor is embedded in the anchor receiving portion;
The bolt is fastened to the anchor; And
A first nut is fastened to the bolt penetrated through the through hole of the reinforcement plate to fix the reinforcement plate to the outer surface of the reinforced concrete member;
Reinforcement structure of the reinforced concrete member using a steel plate and a wire. Forming a protruding insert portion for accommodating the wire and the wire protecting member in the reinforcing plate;
Wrapping wires on the outer surface of the reinforced concrete member;
Passing the wire through a wire protection member;
Positioning the wire protecting member at an edge of the reinforced concrete member;
Forming fastening portions at both ends of the wire; And
Fixing a reinforcement plate to an outer surface of the reinforced concrete member such that the wire and the wire protection member are positioned at the protruding insertion portion;
Reinforcement method of the reinforced concrete member using a steel sheet and wire comprising a. The method of claim 6,
Reinforcing method of the reinforced concrete member using a steel plate and a wire, characterized in that the protrusion inserting portion further comprises an observation to identify the wire. The method of claim 6,
The wire is selected from synthetic fiber wire rope, stainless wire rope, coated wire rope, and shape memory alloy wire rope, and both ends of the wire are fastened using at least one of a socket, a thimble, a clip, a turnbuckle, and an eye bolt. Reinforcement method of the reinforced concrete member using a steel sheet and a wire, characterized in that. The method of claim 6,
The reinforcement method of the reinforced concrete member using a steel plate and a wire, characterized in that the through-hole is further formed through the through-hole through the bolt connecting the outer surface of the reinforced concrete member and the reinforcing plate through the through hole. The method of claim 9,
An anchor receiving portion is formed on an outer surface of the reinforced concrete member;
The through hole of the reinforcing plate is formed at a position corresponding to the position of the anchor receiving portion;
An anchor is embedded in the anchor receiving portion;
The bolt is fastened to the anchor; And
A first nut is fastened to the bolt penetrated through the through hole of the reinforcement plate to fix the reinforcement plate to the outer surface of the reinforced concrete member;
Reinforcement method of the reinforced concrete member using a steel sheet and wire characterized in that.

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