KR101793701B1 - Reinforced structure of concrete column and method thereof - Google Patents

Abstract

The present invention relates to a non-adhesive reinforcement structure of a concrete column and a method thereof. According to the present invention, the non-adhesive reinforcement structure comprises: a metallic reinforcement plate including a first reinforcement plate to surround a part of a circumference of a concrete column and a second reinforcement plate to surround the other part of the circumference of the concrete column, so as to surround the circumference of the concrete column; and a connection part connecting a first end part of the first reinforcement plate and a second end part of the second reinforcement plate to adjust a distance between one end of the first reinforcement plate and the other end of the second reinforcement plate. Accordingly, the structure is installed in a state applying a pressure around a circumference of the column without locally concentrating a stress with respect to a cross section of the column while inhibiting concrete from being separated from a surface of the concrete column closely adhered to the reinforcement plate even if an earthquake occurs; thereby being able to reliably maintain a load endurance capability of the column even if the earthquake occurs.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforced concrete structure for reinforced concrete,

The present invention relates to a non-adhesive reinforcing structure of a concrete column and a reinforcing method thereof, and more particularly, to a concrete reinforcing structure for reinforcing a concrete column which is located outside a transverse reinforcing bar for reinforcing a concrete column at all times or when an earthquake occurs, The present invention relates to a non-adhesive reinforcing structure of a concrete column and a method thereof.

Generally, a column supporting a load is required to construct a structure, and a concrete column which is relatively inexpensive and capable of withstanding a large load is widely used in architectural structures and civil engineering structures.

 In recent years, with the progress of urbanization, the demand for housing has rapidly increased and there is a need to improve old buildings or civil structures. For this purpose, there are plans to dismantle old buildings and to build new ones. However, the construction of irrelevant buildings is costly and hinders the environment, and remodeling of old buildings has improved the performance.

Seismic design must be considered in remodeling old buildings to improve performance. However, it is very difficult to reinforce existing columns and beams, and in particular, in the case of columns, seismic reinforcement for columns is very important because the concrete is easily damaged when the earthquake occurs.

In this connection, according to Korean Patent Registration No. 10-1224188, stiffeners having the same shape are arranged so as to face each other, and a part of the stiffener is disposed so as to overlap the outer surface of the column and the stiffener is fixed with an adhesive such as epoxy To reinforce the column.

However, bonding of the reinforcing material to the surface of the concrete column requires a long time for the bonding process, and there is a problem that the operator drinks harmful chemical substances from the adhesive such as epoxy, and above all, the non-adhesive reinforcing structure of the concrete column It is very difficult to separate the stiffener adhered to the column surface.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a non-adhesive reinforcing structure of a concrete column capable of maintaining a load-carrying capacity of a column more reliably at all times or in case of an earthquake in order to solve the above-mentioned problems.

That is, the present invention aims to reinforce the column walls of the entire cross section of the reinforcing region in a state in which surface pressure acts so as to improve the performance by reducing variation in the reinforcing performance in the entire reinforcing section.

It is another object of the present invention to suppress the deterioration of the concrete outside the reinforcing steel reinforced with concrete columns in the reinforcing area even if an earthquake occurs, thereby maintaining the resistance to earthquake resistance more reliably.

It is another object of the present invention to provide a reinforcement process that is easy to re-install and is eco-friendly even when the non-adhesive reinforcement structure of a concrete column is to be improved by reinforcing the concrete column without an adhering step of epoxy or the like.

In order to achieve the above object, the present invention provides a non-adhesive reinforcing structure for a concrete column, comprising: a first reinforcing plate surrounding a part of a periphery of the concrete column; and a second reinforcing member surrounding another portion of the periphery of the concrete column, A reinforcing plate including a plate, the reinforcing plate surrounding the periphery of the concrete column; A connecting portion connecting the first end of the first reinforcing plate and the second end of the second reinforcing plate to adjust the distance between one end of the first reinforcing plate and the other end of the second reinforcing plate; The reinforcing structure of the concrete pillar is characterized in that the reinforcing structure of the concrete column is constituted by including the reinforcing member.

This is because the reinforcing plate including the first reinforcing plate and the second reinforcing plate is disposed in contact with the concrete pillar so as to surround the periphery of the concrete pillar so that the displacement of the concrete pillar is restrained by the reinforcing plate made of a solid metal, This is to suppress the detachment of concrete from the surface of the concrete column attached to the reinforcing plate.

Further, by connecting the first reinforcing plate and the second reinforcing plate which surround a part of the concrete column in the circumferential direction by using the connecting portion, it is easy to install the reinforcing plate on the concrete columns of various cross sections.

Here, the reinforcing plate may be formed of a metal material or a reinforcing fiber panel formed of reinforcing fibers.

The connecting portion includes a connecting rod connecting the first end and the second end, and an adjusting nut coupled to the connecting rod to adjust a distance between the first end and the second end; And the first end and the second end are connected to each other in a state in which tensile stress is introduced into the connecting rod by tightening the adjusting nut.

In this way, when the reinforcing plate is connected to the connecting rod connecting the first end and the second end in a state in which tensile stress is introduced, tensile stress acts on the reinforcing plate by the connecting rod. When the reinforcing plate is installed in a shape of a curved surface or a vertex of the concrete column to surround the convex portion, a tensile force acts on the reinforcing plate by the connecting rod, and a pressing force for pressing the surface of the concrete column is introduced.

Accordingly, since the present invention is installed in a state in which stress is not concentrated in the vicinity of the vertex and the pressing force is introduced around the periphery of the column as in the prior art, the present invention has more uniform resistance against external forces in all directions, Even if an earthquake occurs, it is possible to implement a reinforcing structure having high resistance to vibration in all directions.

On the other hand, a first connection surface and a second connection surface are formed at the first end and the second end, respectively, in a direction away from the surface of the column, and the connection rod is connected to the first connection surface and the second connection surface As shown in FIG.

As described above, the end portion of the reinforcing plate is bent in a direction substantially perpendicular to the column wall surface, and the first connecting face bent at the first end of the first reinforcing plate and the second connecting face bent at the second end of the first reinforcing plate are bent Since the connecting surfaces are opposed to each other, it is possible to minimize the distance from the surface of the concrete column to the connecting rod. Through this, tensile stress acts on the connecting rod, so that the end of the reinforcing plate connected to the connecting rod minimizes the force applied from the surface of the concrete column, so that the end of the reinforcing plate can be kept in close contact with the surface of the concrete.

At this time, the end of the connecting rod may be fastened and fixed to a fixing block closely attached to at least one of the first connecting surface and the second connecting surface. As a result, even if the ends of the reinforcing plate are formed to have a constant cross-section, the ends of the connecting rods can be fixed by the fixing block, so that the manufacturing of the reinforcing plate becomes simpler, Can be obtained.

In this case, at least one of the first connection surface and the second connection surface is formed to have a 'C' -shaped cross section, and when the fixed block is accommodated in the 'C' -shaped cross section, So that it can be positioned in place.

The connecting rod includes a first connecting rod passing through the first connecting surface and having a first male thread formed on an outer circumferential surface thereof and a second connecting thread passing through the second connecting surface, Wherein the adjusting nut is formed with a first female thread portion engaged with the first male thread portion and a second female thread portion engaging with the second male thread portion, 2 can be installed at the same time as the other end of the connecting rod.

With the above configuration, only by adjusting the adjusting nut located between the first end of the first reinforcing plate and the second end of the second reinforcing plate, the distance between the first end and the second end is adjusted, The introduction amount of the tensile stress can be simply controlled. In addition, since all of the adjustment nuts can be disposed between the first end and the second end, it is sufficient to separate only the clearance z from the surface of the column so as to rotate the adjustment nut, It is possible to implement a structure that minimizes the distance.

The cross section of the concrete column may have a curved section such as a circular or elliptical shape, and the first reinforcing plate and the second reinforcing plate may be curved surfaces corresponding to the curvature of the outer surface of the concrete column.

In this case, even if the lengths of the first reinforcing plate and the second reinforcing plate are short, since the first reinforcing plate and the second reinforcing plate are formed so as to surround the convex portion convex to the curved surface, When the tensile stress acts on the concrete, the first reinforcing plate and the second reinforcing plate are naturally adhered to the concrete surface, so that the pressing force acts on the first reinforcing plate and the second reinforcing plate.

In the case of a curved surface such as a circle or an ellipse, even if only one connection portion is formed, the surface of the concrete column may be in a close contact state in which a pressing force is exerted by the first reinforcing plate and the second reinforcing plate.

The cross section of the concrete column may be formed in a polygonal cross-section, and the first reinforcement plate and the second reinforcement plate may be formed so as to surround at least one apex area of the polygonal cross-section.

In this case, when the both ends of the reinforcing plate bent with respect to the vertex region are subjected to tensile stress by the connecting portion, a pressing force (surface pressure) acts on the entire surface of the bottom of the reinforcing plate.

At this time, the connecting portion is disposed at a central portion of the sides of the polygonal cross section, so that a pressing force acting on the polygonal cross section of the column is distributed. However, the present invention is not limited to the configuration in which the position of the connecting portion is located at the center of the side of the polygonal section, and the connecting portion may be located at a position offset from the center toward the corner.

Meanwhile, a chamfer section having a part of the vertex may be formed on the polygonal section, and a filling material may be filled in the chamfer section. As a result, when the reinforcing plate is installed so as to surround the vertex point, the reinforcing plate is locally warped in the space between the reinforcing plate and the column chamfer, so that the surface pressure applied to the surface of the column can be prevented from being lost .

The first reinforcing plate and the second reinforcing plate are further provided with a bending stiffness reinforcing member for reinforcing the bending stiffness in a region surrounding the apexes so that the amount of bending deformation of the reinforcing plate is suppressed in the vicinity of the vertex, It is possible to reliably introduce the pressing force (surface pressure) by which the reinforcing plate located on the other side of the reinforcing plate presses the surface of the column on the basis of the vertex point.

The reinforcing plate may further include a third reinforcing plate surrounding another portion of the periphery of the concrete column, and one end of the third reinforcing plate may include at least one of the first reinforcing plate and the second reinforcing plate, And can be connected to the second connecting member. That is, the reinforcing plate may include three or more connecting portions including a first reinforcing plate, a second reinforcing plate, and a third reinforcing plate to surround the periphery of the column.

The reinforcing plate may be formed to surround the concrete columns in a strip shape, and the reinforcing plates may be spaced apart or arranged continuously in the height direction of the concrete columns. It is also possible to apply a different pressing force to the reinforcing plate distributed according to the height of the concrete column.

Alternatively, the reinforcing plate may be provided in a shape such that the concrete column is surrounded by a single band having a height of 50 cm or more. In this case, since the height of one reinforcing plate is formed to be as high as 50 cm or more, a large number of connecting portions are arranged at different heights between the first end portion and the second end portion, The pressing force for pressing is controlled by a plurality of connecting portions.

Preferably, the reinforcing plate is closely attached to the surface of the concrete column in a state in which the surface of the concrete column is faced with a flat surface. As a result, tensile forces are exerted on both ends of the reinforcing plate by the connecting portion, so that while the tensile displacement occurs in the reinforcing plate, the sliding displacement of the reinforcing plate and the surface of the concrete column becomes smooth without any interference due to friction between them The tensile displacement of the reinforcing plate is uniformly generated as a whole, the stress is not locally concentrated on the reinforcing plate, and the surface of the concrete column is smoothly and flatly formed, so that the pressing force pressed by the reinforcing plate acts on the wall surface.

The area where the concrete column is reinforced can be variously determined. It may be done all over the column as required, and may be done only on the weak section of the column. For example, the reinforcing plate may be disposed at least partially in a range from a bottom end of the concrete column to a position spaced upward by a height corresponding to the thickness of the cross section of the concrete column. The reinforcing plate may be disposed at least partially in a range from a lower end of the concrete column to a position spaced downward by a height corresponding to a thickness of a section of the concrete column.

Here, the concrete column includes not only pillars in which a ceiling surface and a bottom surface are explicitly installed together in an architectural structure or a civil engineering structure, but also a column shape in which a section is changed like a bridge pier. The ceiling and the bottom in a post structure with a varying cross section are defined to refer to the position where the cross section begins to expand.

According to another aspect of the present invention, there is provided a method for reinforcing a concrete column, comprising: a first reinforcing plate surrounding a part of the periphery of the concrete column; and a second reinforcing plate surrounding another portion of the periphery of the concrete column, A reinforcing plate mounting step of placing a reinforcing plate surrounding the periphery of the concrete column in close contact with the concrete column; The first reinforcing plate and the second reinforcing plate are connected to each other at their opposite ends by a connecting portion so that the first reinforcing plate and the second reinforcing plate are brought close to each other by the connecting portion and the plate surface is brought into close contact with the outer surface of the concrete column A step of adhering the reinforcing plate; The reinforcing method of the concrete pillar is characterized in that the reinforced concrete pillar is reinforced.

A surface treatment step of treating the surface of the concrete column with a flat surface; And may be further included before the step of adhering the reinforcing plate.

A first connecting surface and a second connecting surface are formed at the first end and the second end, respectively, in a direction away from the surface of the column; Wherein the connecting portion includes a connecting rod that is installed to penetrate the first connecting surface and the second connecting surface, and an adjusting nut that is fastened to the connecting rod, and by tightening the adjusting nut, And a pressing force for pressing the plate surface of the reinforcing plate against the concrete column is applied while a force for bringing the distance of the two connecting surfaces into contact with each other is introduced.

As described above, according to the present invention, since the metal reinforcing plate including the first reinforcing plate and the second reinforcing plate is disposed in contact with the concrete column so as to surround the periphery of the concrete column, the reinforcing plate of the metal material, It is possible to prevent the outer concrete of the reinforcing bars laid on the column from falling off from the surface of the concrete column adhering to the reinforcing plate of the reinforcing area and to improve the resistance to earthquake resistance .

Above all, in the present invention, the reinforcing plate is disposed so as to surround the convex portion such as the vertex of the column cross section or the convex curved surface, and the reinforcing plate is installed in a state in which tensile force acts on the reinforcing plate by the connecting portion, The stress is not locally concentrated on the basis of the cross section of the column and the pressing force is applied around the column so that the tensile stress generated in the column section due to repeated loads such as earthquakes is reinforced It is possible to cancel out all directions with the pressing force introduced by the plate, and it is possible to obtain a favorable effect that the load-carrying ability of the column can be maintained more reliably even in the occurrence of an earthquake.

In addition, the present invention is characterized in that a reinforcing plate is formed by bending an end portion of the reinforcing plate to have a "C" -shaped cross section, placing a fixing block having a female thread on its end face, The distance between the connecting rod and the wall of the column can be minimized by arranging the adjusting nut located between the connecting surfaces to adjust the gap between the reinforcing plates. Thus, the height difference between the plate surface of the reinforcing plate and the connecting rod The advantage of minimizing lifting of the reinforcing plate adjacent to the connecting portion can be obtained.

FIG. 1A and FIG. 1B are schematic views showing a column to which a non-adhesive reinforcing structure of a concrete column according to an embodiment of the present invention is applied;
FIG. 2 is an enlarged perspective view of a portion 'A'
FIG. 3 is a cross-sectional view taken along line XX of FIG. 1A,
4 is an enlarged perspective view of a portion 'B' in FIG. 3,
5A is an enlarged view of a portion 'B' in FIG. 3,
FIG. 5B is a view showing a configuration of a connection portion according to another embodiment of the present invention corresponding to the portion 'B' in FIG. 3;
6A is an enlarged view of a portion 'C' in FIG. 3,
FIG. 6B is an enlarged view showing a configuration according to another embodiment of the present invention corresponding to the portion 'C' in FIG. 3;
7 is a perspective view illustrating a non-adhesive reinforcing structure of a concrete column according to another embodiment of the present invention,
8 is an enlarged view of a portion 'D' in FIG. 7,
Fig. 9 is a side view of Fig. 7,
10 is a perspective view illustrating a non-adhesive reinforcing structure of a concrete column according to another embodiment of the present invention,
11 is a cross-sectional view of Fig. 10,
12 is a perspective view illustrating a non-adhesive reinforcing structure of a concrete column according to another embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail to avoid obscuring the subject matter of the present invention.

As shown in the drawings, a reinforcing structure 100 of a concrete column 10 according to an embodiment of the present invention includes a first reinforcing plate 111 that surrounds a concrete column 10 by a predetermined length, A plurality of reinforcing plates 110 including reinforcing plates 112 and connecting portions 120 connecting the ends 111a, 112a, 113a and 114a of the reinforcing plates 111, 112, 113, 114, The connecting portion 120 and the plurality of reinforcing plates 110 are configured to reinforce the reinforcing region Y of the column in such a manner that the reinforcing plate 110 surrounds the periphery of the concrete column 10.

Here, the reinforcing area Y is determined in consideration of the aging condition of the concrete column 10, which is the object to be reinforced, and the load acting after the performance improvement. Generally, the reinforcement area Y is determined to include a section of the column where a high load acts on the column structure. The width (w) of the section of the concrete column from the bottom of the column contacting the bottom 14 of the concrete column 10 And a height H1 corresponding to the width w of the cross section of the concrete column from the column top in contact with the ceiling 16 of the concrete column 10 ) From the lower side to the lower side. In general, the height (H1, H2) of the reinforced area is determined by the thickness value (w) (width, width, or average value of the columns) of the column.

Here, the concrete column 10 not only includes a structure in the form of vertically connecting the floor 14 and the ceiling 16 as shown in Fig. 1A, And a vertical structure in which a load is transferred from the upper portion as shown in FIG. The pillar structure of piers and so on is considered as a position where the section where the section starts to be extended comes into contact with the ceiling, and the reinforcing area (Y) is determined.

2 and 3, the reinforcing plate 110 is formed so as to surround the concrete column 10, and a plurality of reinforcing plates 111, 112, 113, As shown in FIG.

The reinforcing plate 110 may be formed of a metal material such as steel or may be formed in the form of a reinforcing fiber panel or may be formed in a non-adhered state on the outer surface 10s of the reinforcing region Y of the column 10 So that the outer surface of the concrete column 10 is physically confined.

Generally, when an earthquake occurs in the concrete column 10, a load is concentrated in a weak region (that is, a reinforcing region indicated by 'Y') where the load due to the earthquake acts most, When the reinforcing plate 110 is installed in close contact with the surface of the concrete column 10 as described above, the concrete in the outer region (c) of the concrete column (not shown) may fall off without being able to withstand the tensile stress. The surface of the column 10 is held by the reinforcing plate 110 so that the displacement of the outer concrete of the reinforcing plate of the column is physically suppressed by the reinforcing plate 110, It is possible to prevent the outer surface from falling off.

As shown in FIGS. 4 and 5A, the reinforcing plates 111, 112, 113, 114 and 110 are manufactured simply and inexpensively by bending a steel plate having a uniform thickness. Both end portions 111a, 112a, 113a and 114a are bent in a U-shaped cross section to form connection faces 111s, 112s, 113s and 114s facing each other with respect to the reinforcing plates adjacent to each other in the circumferential direction of the column. As described above, the connecting surfaces 111s, 112s, 113s, and 114s facing each other are formed on the end portions 111a, 112a, 113a, and 114a of the adjacent reinforcing plates 111, 112, 113, and 114, It is possible to easily install the connecting rod 122 connecting the connecting rods 111, 112, ... and enhance the effect of transmitting the tensile force introduced by the connecting rod 112 to the plate surfaces of the reinforcing plates 111, 112, have.

As shown in FIG. 5B, the connecting surfaces 111s 'and 112s' are formed by welding and fixing the connecting block 125 having the threads at the ends of the reinforcing plates 111, 112, You may.

The connecting surfaces 111s, 112s, ..., 111s ', 112s', and the like described in the present specification and claims are not limited to the shapes of the columns from the plate surfaces of the reinforcing plates 111, 112, Refers to a surface extending in the radial direction (direction away from the column surface) of the reinforcing plates 111, 112, ... of the reinforcing plates 111, 112, ..., 112s, ..., 111s ', 112s', ... are preferably parallel but may not necessarily be formed in parallel.

3, the reinforcing plate 110 is formed to include at least two first reinforcing plates 111 and a second reinforcing plate 112. [

The connecting portion 120 connects connecting surfaces 111s and 112s provided at the end portions 111a and 112a of the reinforcing plates 111 and 112 as shown in FIG. 4 and FIG. 5A, And a control nut 124 for adjusting the distance between the ends of the reinforcing plates 111, 112, ... coupled to the male thread of the connecting rod 122, In the case of a polygonal column, it is located at the center of the side of the polygonal cross section.

However, according to another embodiment of the present invention, the connecting portion 120 is not limited to the structure that is located at the center of the side of the polygonal cross section (rectangular cross section in the drawing), and the connecting portion 120 may be biased from the central portion toward the corner have.

The connecting rod 122 includes a first connecting rod 122a passing through the through hole formed in the first connecting face 111s of the first reinforcing plate 111 and formed with a male thread in the first direction, And a second connecting rod 122b passing through the through-hole formed in the second connecting surface 112s of the connecting member 112 and having a male thread in a second direction opposite to the first direction. The adjusting nut 124 is formed with a female screw thread at one end thereof engaged with the male thread of the first connecting rod 122a and a female screw thread at the other end thereof engaged with the male thread of the second connecting rod 122b, The first connecting rod 122a and the second connecting rod 122b are connected by an adjusting nut 124 located between the first connecting portion 111s and the second connecting surface 112s. Accordingly, the length of the connecting rod 122 is adjusted while the length of the connecting rod 122 is adjusted according to the rotating direction of the adjusting nut 124.

The fixing block 126 having the female screw holes aligned with the through holes of the connecting faces 111s, 112s, ... of the reinforcing plates 111, 112, And is fastened to the first connecting rod 122a and the second connecting rod 122b, respectively. Since the rotation of the fixing block 126 is restricted by the reinforcing plate end portions 111a, 112a, ... of the 'D' shape, the length of the connecting rod 122 is changed according to the rotation 124d of the adjusting nut 124 Can be adjusted freely.

4, when the fixing nut 124 is rotated in the forward direction 124d, the distance between the first connecting rod 122a and the second connecting rod 122b in the fixing nut 124 is The end of the first connecting rod 122a and the end of the second connecting rod 122b move in the directions 88a and 88b approaching to each other while the first connecting rod 122a and the second connecting rod 122b are fixed The first reinforcing plate 111 and the second reinforcing plate 112 are moved in a direction in which they are close to each other. The other end portions 111a and 111b of the first reinforcing plate 111 and the second reinforcing plate 112 are connected to the end portions 114a and 113a of the fourth reinforcing plate 114 and the third reinforcing plate 113, The tensile force P1 acts on the first reinforcing plate 111 and the second reinforcing plate 112 when tensile force acts on the connecting rods 122a and 122b.

The distance between the connecting surfaces 111s, 112s, ... of the reinforcing plates 111, 112, ... reaches a predetermined distance by the adjusting nut 124 and a predetermined tensile force is applied to the connecting rod 122 The fixing nuts 129 fastened to the connecting rods 122a and 122b are brought into close contact with the connecting surfaces 111s and 112s so as to be brought into contact with the reinforcing plates 111, Thereby fixing the state in which the tensile forces P1, ... are introduced.

On the other hand, the connecting portions 120 'for introducing the tensile forces P1, P2, ... to the reinforcing plates 111, 112, ... may be configured not to include the connecting rods in the opposite directions . 5B, connecting blocks 125 'and 125 having through holes are fixed to the end portions of the first reinforcing plate 111 and the second reinforcing plate 112 so that the connecting blocks 125 and 125' A fixing nut 126 'is fastened to one end of the connecting rod 122' passing through the connecting rod 122 'and an adjusting nut 124' is fastened to the other end of the connecting rod 122 ' To introduce the tensile force P1 to the plate surfaces of the reinforcing plates 111 and 112 while applying a tensile force to the connecting rod 122 'by tightening the connecting rod 122'. 5B is disadvantageous in that the distance e 'between the connecting rod 122' and the reinforcing plate 111 is further increased by the thickness of the reinforcing plates 111 and 112 as compared with the configuration of FIG. 5A However, since the tension P1 is applied to the reinforcing plates 111 and 112 by tightening the adjusting nut 124 'at one side, it is possible to obtain an advantage that the work of introducing the tensile force P1 is facilitated.

5C, the connection block 120 '' may be formed by connecting the connecting blocks 125 and 125 'to the ends of the reinforcing plates 111 and 112, The connecting blocks 125 and 125 'are coupled to the upper surfaces of the reinforcing plates 111 and 112. In this way, when the connecting blocks 125 and 125' are coupled to the upper surfaces of the reinforcing plates 111, 112, And the welding connection portions 77 of the connection blocks 125 and 125 'are formed on both sides of the connection blocks 125 and 125' so that the connection blocks 125 and 125 ' A larger tensile force is applied to the connecting rod 122 'so that the reinforcing plates 111, 112, ... can also be attached to the plates 111, 112, It is possible to acquire the advantage that it is possible to introduce the.

The configuration of the connection portions 120 'and 120' 'shown in FIGS. 5B and 5C may be modified such that the surface of the concrete column 10 is formed in a circular or rectangular shape by forming a through hole instead of forming a thread in the connection block 125 or 125' The reinforcing plates 111, 112, ... may be formed by installing the connecting rods 122 'in the connecting blocks 125 and 125' and introducing a tensile force to the connecting rods 122 ' So that it is easy to introduce a tensile force.

Meanwhile, the present invention is not limited to the configuration shown in Figs. 5A to 5C, and may be formed by various combinations of the configurations shown in Figs. 5A to 5C. That is, the configurations of the connecting rods 122a and 122b and the adjusting nut 124 in Fig. 5A can be applied to the configurations of Figs. 5B and 5C. That is, the connecting rod 122 'shown in FIGS. 5B and 5C is formed of two connecting rods having male threads formed in different directions. Instead of forming the through-holes in the connecting blocks 125 and 125' And by positioning the adjusting nut 124 'in the form of engaging with two connecting rods between the connecting blocks 125 and 125'.

3, the reinforcing plate 110 includes at least two first reinforcing plates 111 and a second reinforcing plate 112, and each of the reinforcing plates 111, 112, ... are arranged so as to surround at least one vertex area of the concrete column 10 and the reinforcing plates 111, 112, ... are connected and installed with the tensile force introduced into the connecting rod 122 , The tensile force P1 acts on the reinforcing plates 111, 112, ... along the plate surface.

3, the plates 1A and 2A of the first and second reinforcing plates 111 and 112, which are in contact with the column wall surface 10A where the central upper connecting portion 120 is located, The first reinforcing plate 111 and the second reinforcing plate 111 are brought into contact with the column wall surfaces 10B and 10C where the tensile force P1 is introduced and the right connecting portion 120A and the left connecting portion 120B are positioned with respect to the vertex point region, The pressing force S1 pressing the wall surfaces 10B and 10C acts on the 1B region and the 2B region of the substrate 112. [

Similarly, by the tensile force P2 acting on the connecting portion 120B connecting the second reinforcing plate 112 and the third reinforcing plate 113, the upper connecting portion 120 and the lower connecting portion 120 A pressing force S2 for pressing the wall surfaces 10A and 10D acts on the second gusset plate 112 and the third gusset plate 113 which are in contact with the column wall surfaces 10A and 10D on which the first wall surfaces 10A and 10OC are located. The left connection part 120B and the right connection part 120A are formed with a tensile force P3 acting on the connecting part 120C connecting the third reinforcing plate 113 and the fourth reinforcing plate 114, A pressing force S3 for pressing the wall surfaces 10C and 10B acts on the third reinforcing plate 113 and the fourth reinforcing plate 114 which are in contact with the column wall surfaces 10C and 10B in which the wall surfaces 10C and 10B are located. The upper and lower connecting portions 120 and 120C are connected to each other by the tensile force P4 acting on the connecting portion 120A connecting the fourth reinforcing plate 114 and the first reinforcing plate 111, A pressing force S4 for pressing the wall surfaces 10A and 10D is applied to the first reinforcing plate 111 and the fourth reinforcing plate 114 which are in contact with the column wall surfaces 10A and 10D in which the wall surfaces 10A and 10D are located.

At this time, the inner surfaces of the reinforcing plates 111, 112, .... are introduced from the respective connecting portions 120, 120A, ... with the condition that the size variation of the surface pressure pressing the inner wall 10s of the concrete is minimized. It is preferable to adjust the magnitude of the tensile force.

As shown in FIG. 6A, when the vertex of the concrete column 10 is not sharp and a chamfer is formed, chamfers are formed in the shapes of the reinforcing plates 111, 112, Or may be formed by filling the filler material 130 in the gap between the reinforcing plates 111, 112, ... of the 'a' -shaped section and the concrete column 10. As described above, by filling the filler material 130 in the chamfered region of the concrete column 10, tensile forces P1, P2, P3 and P4 in the plate surface direction are applied to the reinforcing plate 110 of the ' S2, S3, and S4 that press the column wall surfaces 10A, 10B, 10C, and 10D without being dissipated from the column wall surfaces 10A, 10B, 10C, and 10D. Here, the filling material 130 may be formed of epoxy, non-shrinkage mortar, or the like, and may be formed of a mortar containing an expanding material to completely fill the gap.

On the other hand, as shown in FIG. 6B, a bending stiffness reinforcing member 118 for reinforcing bending stiffness may be additionally formed in a region of the reinforcing plates 111, 112,... Here, the bending stiffness reinforcing member 118 is configured to be coupled by welding, but may be coupled to the reinforcing plates 111, 112, .... by various coupling means such as bolts. The flexural rigidity reinforcing member 118 may be formed to be small in the region surrounding the vertex but may be extended to a position where the end of the flexural rigidity reinforcing member 118 is adjacent to the connecting portion 120.

The tensile forces P1, P2, ... in the direction of the sheet surface introduced into one end of the reinforcing plates 111, 112, ..., while suppressing the amount of bending deformation of the reinforcing plates 111, 112, (Surface pressure, S1, S2, ...) that presses the column wall surface in the other area of the reinforcing plate on the basis of the vertexes can be surely introduced with a larger and smaller deviation.

When tensile force is applied to the reinforcing plates 111, 112, ... by the connecting portions 120, 120A, 120B and 120C, the reinforcing plates 111, 112, ... are provided on the opposite sides of the convex portions protruding like the vertexes. , ....) can exert a pressing force (S1, S2, S3, S4) for pressing the wall surface of the column. As a result, the reinforcing structure of the present invention allows the reinforcing plate 110 to press the column wall surface 10s of the reinforcing region Y over the entire circumference, and therefore, by the repeated load such as an earthquake applied to the concrete column, Since the tensile stress generated in the cross section can be canceled by the pressing forces S1, S2, S3, and S4 by the reinforcing plate 110, an advantageous effect that the load carrying capacity of the column can be more reliably maintained even when an earthquake occurs can be obtained .

The introduction of the tensile forces P1, P2, ... to the plate surface of the reinforcing plate 110 is performed by introducing a tensile force to the connecting rod 122. The center shaft of the connecting rod 122 and the reinforcing plate 110 Since the distance e to the plate surface of the reinforcing plate 110 is spaced apart from the plate surface of the reinforcing plate 110 due to the tensile force introduced into the connecting rod 122,

In order to minimize such a phenomenon, the ends 111a of the reinforcing plate 110 are bent so as to form a connecting surface 111s, and a fixing block 112, Only the fixing block 126 which is not necessary to be positioned above the reinforcing plates 111, 112 ... ... is disposed on the connecting surfaces 111s and 112s, It is possible to arrange only the adjusting nut 126 and the fixing nut 129 between the connecting rod 106 and the connecting rod 106 so that the distance z at which the adjusting nut 126 can be pulled is secured to the column wall 10s. 122 and the plate surface of the reinforcing plate 110 can be minimized.

The distance z between the adjusting nut 126 and the column wall surface 10s may be set to be 5 mm to 10 mm or less since a distance that does not contact the column wall surface 10s is sufficient. The distance between the connecting rod 122 and the plate surface of the reinforcing plate 110 is minimized so that even if a high tensile force P1 is introduced by the connecting rod 122, The phenomenon can be almost solved.

The reinforced structure 100 of the concrete column 10 according to the present invention may be applied to a rectangular column 10 having a substantially rectangular cross section as shown in the figure, The present invention is also applicable to columns of various polygonal sections or more.

In the figure, a configuration in which one reinforcing plate 111, 112, ... surrounds one vertex region is exemplified, but the present invention is not limited thereto, and the present invention can be applied to a case where a single reinforcing plate simultaneously surrounds two or more vertex regions It is also within the scope of the present invention to consist of lengths.

In this case, in order to apply the surface pressure (pressing force) to the wall surface of the concrete column by the reinforcing plate, the reinforcing plate is bent and formed into a shape including a convex portion like a vertex of the column cross section, So as to introduce a tensile force.

In the meantime, a plurality of strips surrounding the concrete column 10 are disposed apart from each other by a plurality of reinforcing plates 111 and 112, but a plurality of reinforcing plates may be used to surround the concrete column 10 And may be configured to be closely arranged in a plurality of strip shapes.

7 to 9, all of the heights H1 and H2 of the reinforcing area Y of the concrete column 10 to be reinforced are connected to one reinforcing plate (not shown) 111 ', 112', 113 ', ..., 110'.

In this case, since the height of one reinforcing plate 111 'is large, a plurality of connecting portions 120 connecting in the circumferential direction of the concrete column 10 are determined along the column height direction. Herein, in order to minimize the deviation of the tensile force introduced by the connecting rod 122 of the plurality of connecting portions 120 when the reinforcing plates 111 ', 112', ... are installed, It should be dispersed properly.

Since the reinforcing plate is closely attached to the entire height H1 and H2 of the reinforcing area Y by one reinforcing plate 111 ', 112',..., The construction time of the reinforcing plate can be shortened, It is possible to more reliably suppress the phenomenon in which the outer wall concrete between the reinforcing bars and the outer wall (c) falls off when a cyclic load such as an earthquake acts.

According to another embodiment of the present invention, as shown in FIGS. 10 and 11, the present invention is also applicable to a circular column 10 'or an elliptical column having a curved cross-sectional shape.

As shown in FIG. 11, since the reinforcing plates 211, 212 and 210 are formed in a curved shape in the column 10 'made only of a curved surface, unlike the embodiment of FIG. 3, It is wrapped in the whole section. Therefore, when a tensile force is introduced in the direction of the plate surface of the reinforcing plates 211 and 212 by the connecting portions 120 connecting the ends of the reinforcing plates 211 and 212, the inner surfaces of the reinforcing plates 211 and 212 are inserted into the circular columns The pressing force S1 for pressing the inner wall of the inner wall 10 'acts the same.

In the figure, a plurality of strips surrounding a concrete column 10 'are spaced apart from each other by a plurality of reinforcing plates 211 and 212, but a plurality of reinforcing plates may be used to surround the concrete column 10' And may be configured to be closely arranged in a plurality of strip shapes.

According to another embodiment of the present invention, even when the cross section of the concrete column 10 'is only curved as shown in Fig. 12, the height of the reinforcing area Y of the concrete column 10 to be reinforced All of the reinforcing plates H1 and H2 may be formed as one reinforcing plate 211 'or 212'. Also in this case, since the height of one reinforcing plate 211 'is large, a plurality of connecting portions 120 connecting in the circumferential direction of the concrete column 10 are determined along the column height direction. Similarly, in order to minimize the variation in the tensile force introduced by the connecting rod 122 of the plurality of connecting portions 120 when the reinforcing plates 211 ', 212', ... are installed, It is preferable to disperse them appropriately.

Since the reinforcing plate is closely attached to the entire height H1 and H2 of the reinforcing area Y by one reinforcing plate 111 ', 112',..., The construction time of the reinforcing plate can be shortened, It is possible to more reliably suppress the phenomenon in which the outer wall concrete between the reinforcing bars and the outer wall (c) falls off when a cyclic load such as an earthquake acts.

Hereinafter, a method of reinforcing concrete pillar 10, 10 'according to the present invention will be described in detail.

First, the reinforcing area Y is determined with respect to the columns 10 and 10 'to be reinforced, and the surface treatment is performed so that the concrete outer wall of the reinforcing area Y becomes a flat and smooth surface within an allowable range.

A part of the periphery of the concrete column 10 is then wrapped with the first reinforcement plate 111 and the other part of the periphery of the concrete column 10 is wrapped with the second reinforcement plate 112, The reinforcing plates 111, 112, 113, and 114 are disposed to surround another part of the periphery of the concrete column 10 with the third reinforcing plate 113 while the rest of the periphery of the concrete column 10 is surrounded by the fourth reinforcing plate 114. [ To the connection part (120).

The adjusting nut 122 of the connecting portion 120 is adjusted to introduce the desired tensile force into the connecting rod 122 so that tensile forces P1, P2, P3, P4). At this time, since the surface of the concrete column 10 is smoothly processed, even if tensile displacement due to the tensile forces P1, P2, P3 and P4 acting on the reinforcing plates 111, 112, 113 and 114 is generated, (S1, S2, S3, S4) that smoothly tensile displacement occurs on the surface of the concrete column (10), and presses the concrete wall surface on the opposite reinforcing plate region with respect to the convex portion, .

Accordingly, even if tensile load and compressive load are repeatedly generated due to earthquake, the concrete column 10 surrounded by the reinforcing plate 110 in a state of being pressed by the reinforcing plate 110, 110, and a part or more of the tensile stress due to the earthquake is canceled by the surface pressure pressed by the reinforcing plate 110, thereby realizing a reinforcing structure having a higher load-carrying capacity.

The reinforcing method described above can be applied to a case where the reinforcing plates 111, ..., 211, ... are arranged in the reinforcing area Y while forming a plurality of bands shown in Figs. 2 and 10, The present invention can be similarly applied to a case where the reinforcing region Y is surrounded by one reinforcing plate 111 ', ..., 211', ... shown in FIG.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention.

10, 10 ': column 14: bottom
16: ceiling 100: reinforced structure
110: reinforcing plate 111: first reinforcing plate
111a, 112a, 113a, 114a:
111s, 112s, 113s, 114s: connecting surface
112: second reinforcing plate 113: third reinforcing plate
114: fourth reinforcing plate 118: bending stiffness reinforcing member
120, 120 ': connection part 122: connecting rod
122a: first connecting rod 122b: second connecting rod
124, 124 ': adjusting nut 125, 125': connecting block
126: Fixing block 129: Fixing nut
130: Filler Y: Reinforcement area
P1, P2, P3, P4: tensile force
S1, S2, S3, S4: pressing force (surface pressure)

Claims (22)

As a non-adhesive reinforced structure of concrete columns,
A first reinforcing plate surrounding a part of the periphery of the concrete column and a second reinforcing plate surrounding another part of the periphery of the concrete column so as to surround the periphery of the concrete column, And a reinforcing plate having a first connecting surface and a second connecting surface formed at an end portion and a second end portion of the second reinforcing plate, the reinforcing plate being bent in a direction away from the surface of the column;
A connecting rod that penetrates the first connecting surface of the first end portion and the second connecting surface of the second end portion and connects the first connecting surface and the second connecting surface of the second end portion, A connection portion including a nut for adjusting a distance between the first connection surface and the second connection surface;
A fixing block disposed in close contact with at least one of the first connecting surface and the second connecting surface and having an end fixed to the connecting rod;
Wherein the first end and the second end are connected with tensile stress introduced into the connecting rod.
The method according to claim 1,
Wherein at least one of the first connecting surface and the second connecting surface is formed in a shape including a 'C' -shaped section, and the fixing block is accommodated in a 'C' -shaped section .
As a non-adhesive reinforced structure of concrete columns,
A first reinforcing plate surrounding a part of the periphery of the concrete column and a second reinforcing plate surrounding another portion of the periphery of the concrete column so as to surround the periphery of the concrete pillar, And a reinforcing plate having a first connecting surface and a second connecting surface formed at an end portion and a second end portion of the second reinforcing plate, the reinforcing plate being bent in a direction away from the surface of the column;
A first connecting rod passing through the first connecting surface of the first end and having a first connecting part formed on an outer circumferential surface thereof and a second connecting part passing through the second connecting surface of the second end, A first connecting thread including a second connecting rod having a male thread and a second connecting thread formed with a second male thread and a second female thread to be engaged with the first male thread and a second female thread to be engaged with the second male thread, And an adjusting nut which is engaged with the other end of the connecting rod so as to be engaged and fixed so as to adjust a distance between the first end and the second end, the connecting portion adjusting the distance between the first connecting surface and the second connecting surface;
And the first end and the second end are connected with a tensile stress introduced into the connecting rod by tightening the adjusting nut.
As a non-adhesive reinforcement structure of a concrete column whose cross section is formed by a polygonal section,
A first reinforcing plate surrounding a part of the periphery of the concrete column and a second reinforcing plate surrounding another part of the periphery of the concrete column, the first reinforcing plate surrounding the periphery of the concrete column, The two reinforcing plates each include a reinforcing plate formed to surround at least one of the vertexes of the polygonal section;
A connecting portion connecting the first end of the first reinforcing plate and the second end of the second reinforcing plate to adjust the distance between one end of the first reinforcing plate and the other end of the second reinforcing plate;
Wherein a chamfer section having a portion of the vertexes removed is formed in the polygonal section, and a filling material is filled in the chamfer section.
4. The method according to any one of claims 1 to 3,
Wherein the cross section of the concrete column is formed to have a curved section, and the first reinforcing plate and the second reinforcing plate are formed to be curved surfaces corresponding to the curvature of the outer surface of the concrete column.
4. The method according to any one of claims 1 to 3,
Wherein the cross-section of the concrete column is formed in a polygonal cross-section, and the first reinforcing plate and the second reinforcing plate are each formed to surround at least one of apexes of the polygonal cross-section.
The method according to claim 6,
Wherein the connecting portion is disposed at a central portion of a side of the polygonal cross-section.
5. The method of claim 4,
Wherein the first reinforcing plate and the second reinforcing plate are formed with a bending stiffness reinforcing member that reinforces the bending stiffness in a region surrounding the vertexes.
5. The method according to any one of claims 1 to 4,
Wherein at least one of the first reinforcing plate and the second reinforcing plate is installed in a manner to surround a convex portion protruding convexly with respect to a transverse section of the concrete column.
5. The method according to any one of claims 1 to 4,
Wherein the reinforcing plate further comprises a third reinforcing plate surrounding another portion of the periphery of the concrete column,
And one end of the third reinforcing plate is connected to at least one of the first reinforcing plate and the second reinforcing plate by a second connecting member.
5. The method according to any one of claims 1 to 4,
Wherein the reinforcing plate is installed in a shape that the concrete columns are surrounded by a band, and the reinforcing plates are spaced apart or continuously arranged in the height direction of the concrete columns.
5. The method according to any one of claims 1 to 4,
Wherein the reinforcing plate is disposed in a shape such that the concrete column is surrounded by a belt having a height of 50 cm or more, and the connecting portion is disposed at a plurality of different heights between the first end portion and the second end portion. Column reinforced structure.
5. The method according to any one of claims 1 to 4,
Wherein the reinforcing plate is closely attached to a surface of the concrete column in a state where the surface of the concrete column is faced with a flat surface.
5. The method according to any one of claims 1 to 4,
Wherein the reinforcing plate is installed at least partially in a range from a bottom bottom of the concrete column to a position spaced upward by a height corresponding to the thickness of the cross section of the concrete column.
5. The method according to any one of claims 1 to 4,
Wherein the reinforcing plate is installed at least partially in a range from a lower end of the concrete column to a position spaced downward by a height corresponding to a thickness of a section of the concrete column.
5. The method according to any one of claims 1 to 4,
Wherein the reinforcing plate is one or more of a metal material and a reinforcing fiber panel.
As a reinforcing method of a concrete column,
A reinforcing plate including a first reinforcing plate surrounding a portion of the periphery of the concrete column and a second reinforcing plate surrounding another portion of the periphery of the concrete column, A reinforcing plate mounting step of mounting a reinforcing plate on the second end of the reinforcing plate, the reinforcing plate having a first connecting surface and a second connecting surface bent in a direction away from the surface of the pillar, ;
Wherein a connecting rod passes through the first connecting surface of the first end and the second connecting surface of the second end to connect the first end and the second end, and the first end and the second end, The distance between the ends of the reinforcing plate is adjusted by adjusting the nut so that the plate surface of the reinforcing plate is brought into close contact with the outer surface of the concrete column while bringing the first reinforcing plate and the second reinforcing plate close to each other, A step of placing a fixing block so as to be in close contact with at least one of the two connecting surfaces and fixing the end of the connecting rod to the fixing block;
And reinforcing the concrete column.
18. The method of claim 17,
A surface treatment step of treating the surface of the concrete column with a flat surface;
Further comprising: prior to the step of adhering the reinforcing plate.
18. The method of claim 17,
Wherein at least one of the first connecting surface and the second connecting surface is formed to have a 'C' -shaped cross section, and the fixing block is arranged to be accommodated in a 'C' -shaped section Reinforcement method.


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