KR101787440B1 - Rigidity reinforcement device for beam with web openings - Google Patents

Abstract

The present invention relates to a rigid reinforcing device for informing. The present invention relates to a pneumatic tire which is installed in a concrete beam penetrating through a hole in a width direction and is continuously installed along the longitudinal direction of the pore so as to prevent exposure to the outside of the beam, And a shear reinforcement made of a rigid material that continuously provides shear resistance along the direction of the shear reinforcement. In the present invention, the shear stiffener continuously provides shear resistance along the axial direction of the hole.

Description

TECHNICAL FIELD [0001] The present invention relates to a rigid reinforcement device,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for reinforcing the rigidity of a beam, and more particularly, to a stiffness reinforcing device for a pneumatic bearing having a hole for a pipe.

It is a horizontal structure member which is connected to a column of a vertical member and supports a load. It receives a force perpendicular to the axis and mainly supports a load by bending and shearing. According to such a supporting method, a simple beam at both ends, a continuous beam with a fulcrum in the middle, a germabar with a pin connected at the middle of the continuous beam, a cantilever beam with both ends fixed and high- .

The above-mentioned view is usually installed at the lower part of the slab as shown in Fig. As shown in FIG. 1 (b), the beam CB is provided with various pipes (for example, air conditioning duct, electricity, and water supply and drainage pipes). As shown in the drawing, the pipe P is installed in a bent state due to the beam CB, and protrudes to a lower portion of the beam CB. Therefore, the building can not reduce the weight of the bedding and the structure due to the projection thickness T of the pipe P projecting to the lower portion of the beam CB as shown in the figure.

In order to solve this problem, as shown in FIG. 2, a beam CB having a hole H formed thereon has been proposed. As shown in FIG. 2, the pipe P is inserted through the hole H through the beam CB. However, the beam CB having such a hole H causes a structural problem such as a reduction in strength and stiffness and deflection due to a loss cross-sectional area corresponding to the size of the hole H. Therefore, the beam CB having the hole H can form almost only one or two holes H as shown in the drawing due to the structural limitations.

However, since the pipe P is composed of a plurality of pipes as shown in Figs. 1 and 2, only a part of the pipe P is installed in the hole H as shown in Fig. 2 (b). Accordingly, the remaining pipe P should be installed in a bent state at the lower part of the beam CB as shown in the figure. Therefore, the beam CB having the above-mentioned hole H can not reduce the weight of the stratified structure and the structure due to the projection thickness T of the pipe P because the pipe P protrudes further downward.

On the other hand, when the hole (H) is formed in the beam (CB), the beam is structurally weak to the shear force acting on the beam (CB) It is a losing situation.

On the other hand, as shown in Fig. 2, the beam CB is usually provided with a circular hollow pipe HP in the hole H. In the case where only the hollow pipe HP is provided and a rigid reinforcing member for reinforcing the sectional area of the loss due to the hole H is not provided, when the shearing force is applied, the beam CB is inclined as shown in FIG. 3 A shearing crack is generated across the approximate center of the hole H. Particularly, since there is no rigid reinforcing member as described above, such a beam CB has a problem that the concrete covering gradually spreads as shown by shear cracking, and thus the rigidity is further weakened.

In order to solve this problem, a patent registered in the Korean Intellectual Property Office (Registered No. 10-999410, Korea Institute of Construction Technology) has a structure in which a flange 2a And the beam 1 is connected to the vertical beam 3 for the column as shown in Fig. 5, and then the concrete 1 is coated with the concrete 1 It is proposed to install technology. However, since the conventional technique uses the beam 1, it is difficult to apply to a general reinforced concrete beam, and the manufacturing cost is excessively increased, and the weight of the beam is increased.

On the other hand, in Japan, a technique of reinforcing the hole H of the beam CB by using the ring-shaped reinforcing bar 20 as shown in Fig. 6 has been developed. This technique is applied to the front end and the rear end of a hollow pipe HP installed between strip roots S surrounding the main rope M of the beam CB and / ) Is installed. 6, the hollow pipe HP is inserted into the inner ring 21 and the support protrusion 25 provided in the inner ring 21 in a protruding state is inserted into the hollow pipe HP And is fixed in a state of being fitted in the hollow tube HP. Therefore, the rigidity of the beam CB is reinforced by the reinforcing bar 20 provided on the hollow pipe HP.

When the shear force is transferred to the beam CB, the above-mentioned reinforcing bar 20 shearstrength against shear force suppresses shear cracking of the concrete C or prevents shear cracking. At this time, the reinforcing bar 20 shear-resists through the outer ring 23.

 However, as shown in FIG. 6, since the rebar 20 is formed in a plane shape, the beam CB can not be erected and is very difficult to install. Since only the installed position of the reinforcing bar 20 is capable of shearing resistance, it is impossible to continuously provide the shear resistance along the axial direction of the hollow pipe HP, and therefore, excellent reinforcing performance can not be expected. In addition, when the reinforcing bars 20 are provided in plural, it is inconvenient that the reinforcing bars 20 should be tightly fixed to the main or the tie bars S by wire, It is not easy to maintain at one interval.

On the other hand, a technique for coping with the above-described reinforcing bar 20 with an inclined bending root WR as shown in Fig. 8 has been popular. This technique provides a beam CB with a hole H by intersecting a plurality of obliquely curved roots WR as shown and inserting the aforementioned hollow tube HP between the crossed gaps. However, this technique is not only low in workability because a plurality of warp knitting roots WR must be bent one by one, and the warp knitting muscle WR is installed only in a state of forming a warp with the hollow tube HP, It is impossible to continuously provide the shear resistance along the axial direction of the pipe HP.

KR 10-999410

SUMMARY OF THE INVENTION It is an object of the present invention to provide a rigid reinforcing device for reinforcing a pierced portion of a beam formed with a hole.

In particular, it is an object of the present invention to provide a rigid reinforcing device for a pneumatic bolt capable of reinforcing a piercing portion against a shearing force by providing a shear resistance force along a longitudinal direction of a pipe body provided in a beam or a beam, to be.

It is another object of the present invention to provide a rigid reinforcing device for a legible bullet which can be fixed in a state of fitting a tube for providing a hole and can stand up by itself due to its structural characteristics.

According to an aspect of the present invention, there is provided a method of manufacturing a steel pipe, comprising the steps of: inserting the steel pipe into a concrete beam, the steel pipe being embedded in a concrete beam having through- And a shear reinforcement made of a rigid material continuously provided along the longitudinal direction of the holes to provide shear resistance.

For example, the shear stiffener is formed in a helical coil shape corresponding to the length of the holes and is provided along the axial direction of the holes. The shear stiffener provides a shear resistance against the shear force acting on the pierced portion of the beam, And a spiral sleeve for suppressing shear cracking of the perforated portion.

The spiral sleeve may be formed of, for example, a spiral reinforcing bar formed in a helical coil shape or a FRP helical groove or a plastic helical groove made of FRP or plastic formed in a helical coil shape.

The shear stiffener may further include a support for supporting a lower portion of the spiral sleeve to stand the spiral sleeve.

For example, the support may include a prismatic bend extending in a staggered fashion from the spiral sleeve and formed into a spiral shape with the spiral sleeve, and may be formed by bending a triangular or octagonal bending root.

Alternatively, the support may be, for example, horizontal roots horizontally provided on at least one of both ends of the spiral sleeve.

Alternatively, the support may be formed of, for example, a square ring connected to at least one of both sides of the spiral sleeve and formed of any one of triangular to octagonal.

The prismatic ring may extend from at least one of both ends of the spiral sleeve and be permanently connected to the spiral sleeve.

Alternatively, the prismatic ring may be detachably connected to at least one of the two sides of the spiral sleeve by a connector separated from the spiral sleeve.

The connector may include a connection block formed on both sides of the outer circumferential surface of the helical sleeve and an outer circumferential surface of the prismatic ring so that the helical sleeve and the prismatic sleeve are wound on the outer circumferential surface of the helical sleeve, And at least one of a band clamp or a wire for connecting the ring.

When the spiral sleeve has a circular shape and is formed in a spiral shape, the support member may be extended from at least one of both ends of the spiral sleeve to be permanently connected to the spiral sleeve, or separated from the spiral sleeve, And a rectangular ring detachably connected to at least one of both sides of the helical sleeve and having a triangular to octagonal shape.

At this time, the spiral sleeve may be configured to have a diameter corresponding to the width of the prismatic ring.

The spiral sleeve is formed to have a diameter corresponding to the width of the rectangular ring when the spiral sleeve is formed to have a diameter smaller than the width of the rectangular ring and is provided on at least one of both ends, And a diameter ring detachably connected to the square ring.

In this case, for example, the connector may include a connection block formed on both sides of the outer circumferential surface of the diameter ring and an outer circumferential surface of the prism ring, And at least one of a band clamp and a wire connecting the rectangular ring.

The present invention is further characterized in that it is necessary to further include a pillar inserted into the spiral sleeve to form a module together with the shear stiffener and installed in a penetrating manner in the beam and providing a hollow capable of being tubed in the hollow have.

The spiral sleeve is preferably formed in a spiral shape having a diameter corresponding to the outer circumferential surface of the pipe tube so that the pipe tube is constrained.

The spiral sleeve may be formed in a spiral shape having at least any one of a circular shape, a rhombus shape, or a polygonal shape of triangular to octagonal.

In the present invention as described above, since the shear reinforcement made of a rigid material continuously provides a shear resistance force along the axial direction of the holes or holes, shear resistance can be generated from the surface side of the beam to the inner center portion of the beam, Shear cracks can be suppressed to the maximum by the shear force, and cracks can be prevented from occurring even if shear cracks occur, and since the shear force transferred to the holes or holes is substantially imposed by the shear reinforcement, So that it can be prevented from proceeding through the center. Therefore, it is possible not only to prevent the strength and the stiffness from being deteriorated even if a large number of holes are formed, but also to prevent a structural problem such as deflection and the like, and as a result, the pipe can be penetrated through the hole, Can be reduced.

In particular, since the shear stiffener is formed of a helical sleeve having a helical coil shape, the helical sleeve can be easily inserted and fixed in the pipe, and the helical sleeve is formed into a spiral shape, so that the shear resistance can be continuously So that it is possible to protect the periphery of the pipe from the shear force along the axial direction of the hole or the pipe. That is, the pierced portion of the beam can be stably protected through the spiral sleeve of the shear reinforcement.

In addition, since the diameter of the helical sleeve corresponds to the outer circumferential surface of the tube, the tube can be stably and firmly fixed to the helical sleeve by interference fit, and in addition, the helical sleeve can be formed in a round shape, a rhombic shape, The degree of freedom and convenience of the image can be improved.

In addition, when the spiral sleeve is provided with a support and the spiral sleeve is supported by the support, not only the spiral sleeve can be easily raised, but also the spiral sleeve and the support can be constituted by one module. If the support is composed of a prismatic bend extending alternately with the spiral sleeve, the support can be molded together when the spiral sleeve is formed. Alternatively, the support can be formed of horizontal roots horizontally provided at the end of the spiral sleeve The support can be easily and easily implemented.

In addition, when the supporting rods are constituted by rectangular rings connected to the end sides of the spiral sleeves, the rectangular rods are constructed in a simple structure, so that the supporting rods can be easily manufactured, and further, the rectangular rings are formed on the ends of the spiral sleeves, It is possible to reduce the manufacturing cost since the prismatic ring can be molded together when the spiral sleeve is formed. Alternatively, when the prismatic ring is detachably coupled to the end side of the spiral sleeve by the connector, It can be applied to spiral sleeves.

In addition, when the connector is formed as a connection block, the spiral sleeve and the square ring can be fixed to the both sides of the connection block so that the spiral sleeve and the rectangular ring can be easily connected. Alternatively, The connector can be easily provided.

On the other hand, when a circular spiral sleeve having a diameter smaller than the diameter of the square ring is constituted, the spiral sleeve is connected to the square ring through the diameter ring and the connector corresponding to the diameter of the square ring, The diameter ring can be easily connected to the square ring, and in addition, the diameter ring can be easily manufactured when the diameter ring ring is molded together when the spiral sleeve is molded. Alternatively, when the diameter ring is formed separately from the spiral sleeve, Can be connected to the square ring.

On the other hand, if shear stiffener alone is used in the absence of a pipe, it is possible to provide shear resistance along the longitudinal direction of the hole through the shear stiffener, thereby preventing cracks in the pierced portion of the beam, In addition, when the shear stiffener is formed of a spiral sleeve having a helical coil shape, it is possible to easily manufacture the shear stiffener with a structure corresponding to the length of the hole. Further, when the spiral sleeve is provided with the above- It is possible to easily stand up the inside of the formwork.

1 shows a part of a general beam;
FIG. 2 is a view showing a general information publication; FIG.
3 is a perspective view showing shear cracks in the guide shown in Fig. 2; Fig.
FIG. 4 is a perspective view showing members applied to a conventional art; FIG.
Fig. 5 is a cross-sectional view of the publication by the member of Fig. 4;
6 is a front view of a conventional reinforcing steel bar;
7 is a cross-sectional view of a conventional steel reinforcing bar shown in FIG. 6;
8 is a cross-sectional view of another general publication;
FIG. 9 is a perspective view showing a configuration of a rigid reinforcing device for a known information according to an embodiment of the present invention; FIG.
10 is a perspective view of the tube shown in FIG. 9;
FIG. 11 is a view showing a shear stiffener according to the first embodiment shown in FIG. 9; FIG.
FIG. 12 is a perspective view of the pipe tube and shear stiffener shown in FIG. 9; FIG.
13 is a view showing a second embodiment of the shear stiffener shown in Fig. 9;
FIG. 14 is a view showing a third embodiment of the shear stiffener shown in FIG. 9; FIG.
FIG. 15 is a view showing a fourth embodiment of the shear stiffener shown in FIG. 9; FIG.
FIG. 16 is a view showing a fifth embodiment of the shear stiffener shown in FIG. 9; FIG.
FIG. 17 is a view showing a sixth embodiment of the shear stiffener shown in FIG. 9; FIG.
Fig. 18 is a front view showing the action of the shear stiffener shown in Fig. 9; Fig.
FIG. 19 is a front view showing a shear crack of the pipe tube shown in FIG. 9; FIG. And
Fig. 20 is a sectional view of a known publication showing the application state of the reinforcing module shown in Fig. 9; Fig.

Hereinafter, a rigid reinforcing device for a known information according to an embodiment of the present invention will be described with reference to the accompanying drawings.

9 and 20, the rigid reinforcing device for a public information according to the embodiment of the present invention may be constituted by the pipe 51 and the shear reinforcement 52 or may be composed of only the shear reinforcement 52. [

As shown in FIG. 10, the perforated pipe 51 is formed of a pipe having a hollow and is installed in a concrete pipe CB as shown in FIG. 19, so that the pipe CB can be tubed H). The pipe 51 constitutes a stiffness reinforcing device 50 for a safety device according to an embodiment of the present invention, together with the shear reinforcement 52 as shown in Figs. 11 and 12.

The hole 51 may be cylindrical as shown in FIG. 10, but may alternatively be a polygon such as a square or a hexagon. As shown in the figures, the pipe 51 is formed with diameters different from each other on both sides, and the large diameter portion and the small diameter portion may be provided on both sides, respectively. The perforated pipe 51 may be provided with a large diameter portion and a small diameter portion as the diameter of one side decreases. In this case, the hole 51c may be formed in the boundary line between the large diameter portion and the small diameter portion by the large diameter portion and the small diameter portion. In the oil pipe 51, a pipe not shown by the large diameter portion is easily inserted into the inside, and the pipe is stably fixed to the inside by the small diameter portion.

The perforated pipe 51 is installed on the mold MD for molding the beam CB as shown in FIG. 9 and is integrally fixed to the beam CB as shown in FIG. 9, the perforated pipe 51 is installed in the formwork MD together with the main and the stitches M for molding the beam CB, and in particular, the longitudinal direction of the main body M, That is, perpendicular to the longitudinal direction of the beam CB, and is parallel to the width direction of the beam CB. As shown in FIG. 20, the perforated pipe 51 is embedded in concrete for forming the beam CB, and the outer circumferential surface excluding both open ends is covered with concrete. Therefore, the perforated pipe 51 is installed in the beam CB as shown in FIG. 19 so as to provide a hole H for tubing to the beam CB.

As shown in FIG. 12, the shear reinforcement 52 is integrally installed in the pipe 51 to be buried in a state of being exposed to the concrete of the beam CB together with the pipe 51 forming one module. The shear stiffener 52 may be formed of, for example, a spiral sleeve 52a made of a rigid rigid material as shown in Fig. The helical sleeve 52a has a length corresponding to the length of the hole H and is composed of a helical coil that is fitted to the outer circumferential surface of the tube 51 as shown in FIG. The spiral sleeve 52a may be any one of a spiral reinforcing bar (spiral reinforcing bar) as shown in the form of a spiral coil or a FRP spiral roving or a plastic spiral roving made of a normal FRP or plastic formed in a helical coil shape It is most preferable to construct a spiral reinforcing bar which is easy to manufacture.

The helical sleeve 52a is fitted on the outer circumferential surface of the pipe tube 51 to provide a shear resistance against the shear force along the axial direction of the tube 51 when shearing force is transferred to the beam CB. Particularly, since the helical sleeve 52a is formed in a spiral shape, it is continuously installed along the axial direction of the cylindrical pipe 51 as shown in FIGS. 12 and 20, so that the shear resistance is continuously applied along the axial direction of the cylindrical pipe 51 to provide. That is, the helical sleeve 52a provides a shear resistance against the shear force acting on the perforated portion of the beam CB formed with the hole H on the outer peripheral surface of the perforated tube 51, thereby suppressing the shear crack of the perforated portion due to the shear force .

The spiral sleeve 52a may be formed of a spiral coil having a circular shape as shown in FIG. 14. Alternatively, the spiral sleeve 52a may be formed of a spiral coil having a rhombus shape as shown in FIGS. 11 and 13, But may be a polygonal spiral coil made of triangular or octagonal shape. However, the helical sleeve 52a is not limited to this shape, but it may be formed of a spiral coil having a structure in which the tube 51 can be inserted therein. In particular, the helical sleeve 52a is preferably formed of a spiral coil of a rhomboid shape corresponding to a transition direction of a shearing force causing a shear crack in the form of an inclined shape, that is, at a right angle to the warp.

When the large diameter portion and the small diameter portion are provided on one side and the other side of the hole 51 as described above, the helical sleeve 52a may be formed to have diameters of both sides corresponding to the large diameter portion and the small diameter portion. Therefore, the spiral sleeve 52a is fixed by tightly fitting one side and the other side of the hole 51.

It is preferable that the helical sleeve 52a is formed in a spiral shape having a diameter corresponding to the outer circumferential surface of the hole 51 so that the hole 51 can be interference. In this case, the spiral sleeve 52a is stably fixed to the inner circumferential surface of the porous tube 51 without a separate long fitting member or a supporting member. Therefore, the operator does not need to perform a separate operation for fixing the tube 51 to the spiral sleeve 52a.

On the other hand, the spiral sleeve 52a may be determined to have a length, a diameter, or a shape depending on the cross sectional area of the beam CB or the required shear resistance as shown in Figs. 19 and 20. Thus, the helical sleeve 52a can be configured in a variety of ways, diameters, or shapes.

On the other hand, the shear reinforcement 52 further includes a support as shown in Fig. The support supports the lower portion of the spiral sleeve 52a as shown in Figs. 9 and 12 so as to stand up the spiral sleeve 52a. That is, as shown in FIG. 9, the spiral sleeve 52a is self-supported by a support when it is installed in a mold (MD) in a state in which the pipe 51 is inserted. The support is integrally connected to the spiral sleeve 52a as shown. Therefore, the shear stiffener 52 and the support member constitute an integrated module.

The supporting base can be constituted by, for example, a prismatic bent bar 52c as shown in Fig. The prismatic bend 52c extends in a staggered fashion from the helical sleeve 52a, as shown, and is helical with the helical sleeve 52a. The rectangular bent bend 52c is formed together with the helical sleeve constituting the helical sleeve 52a, and is formed integrally with the helical sleeve 52a as it is formed in an alternating fashion with the helical coil. The prismatic bending crests 52c are composed of a plurality as shown. In particular, it is preferable that the prismatic bending portion 52c is formed as a pair so that the spiral sleeve 52a does not self-sustain or roll, and it is most preferable that the spiral sleeve 52a is provided at the front end and the rear end of the spiral sleeve 52a. The prismatic bent bend 52c may be formed in a rectangular shape as shown by bending, and in the case of a rectangular shape, a vertical portion 52b is provided as shown in the figure. However, the angled bent ridge 52c may be formed in any shape of triangular, octagonal, or semicircular shape. However, the rectangular bent bend 52c may be a substantially ring-shaped shape having a horizontal plane parallel to the flat bottom of the form MD.

The prismatic flexion muscle 52c is preferably provided on the spiral sleeve 52a so as to form a vertical or nearly vertical (slightly sloped side surface) as shown in FIG. 11 so that the spiral sleeve 52a stably stands. The prismatic bending point 52c has a diameter larger than the diameter of the spiral sleeve 52a as shown in the figure so that the grounding area of the spindle MD against the floor is expanded and the spiral sleeve 52a is more stably seated. As shown in FIG. However, the angular bending point 52c is determined by the size of the diameter (width) finally depending on the cross-sectional area of the beam CB or the required shear resistance.

Unlike the above, the support rods may be configured as horizontal roots 52d as shown in Figs. 13 (c) and 14 (c). The horizontal root 52d is provided horizontally on at least one of the opposite ends of the helical sleeve 52a as shown in the figure. The horizontal root 52d is formed by bending the end of the helical sleeve 52a, that is, the helical coil, in a horizontal state or in a shape bent in a horizontal state as shown in the figure. The horizontal roots 52d are formed in a horizontal state and stably stood on the bottom of the form MD. It is preferable that the horizontal muscles 52d are provided at both ends of the helical sleeve 52a as shown in FIG. The horizontal root 52d is preferably formed longer than the radius of the helical sleeve 52a so as to secure a sufficient ground contact area with respect to the bottom of the form MD.

Alternatively, the support may comprise a rectangular ring 52e as shown in Fig. The rectangular ring 52e is connected to at least one of the two sides of the helical sleeve 52a as shown. The square ring 52e is formed in any one of triangular to octagonal shapes so that the ground area of the mold MD is secured, that is, the horizontal part is provided. The angular rings 52e are preferably formed in pairs as shown in the figure so that the helical sleeves 52a are stably mounted on the form MD and are preferably provided on both ends of the helical sleeves 52a, It is most preferable that the spiral sleeves 52a are vertically or roughly vertically arranged with a slight inclination so that the spiral sleeves 52a are more stably seated. (D) larger than the diameter (d). However, the square ring 52e may be configured to have a diameter D equal to or similar to the diameter d of the helical sleeve 52a. This rectangular ring 52e is determined in accordance with the size of the final diameter (width) of the beam CB or the required shear resistance. The square rings 52e may be provided at the ends of the helical sleeves 52a as shown in the figure. Alternatively, a plurality of the helical sleeves 52a may be provided at the ends of the helical sleeves 52a. That is, the number of the square rings 52e is determined according to a required design value.

The rectangular ring 52e described above may be configured to extend from the end of the helical sleeve 52a and be permanently connected to the helical sleeve 52a as shown in FIG. In this case, the angular ring 52e is molded together during the formation of the helical coil providing the helical sleeve 52a. Therefore, the rectangular ring 52e is easily integrated with the spiral sleeve 52a.

However, the angled ring 52e may be manufactured separately from the spiral sleeve 52a as shown in FIG. 16 and may be separate from the spiral sleeve 52a. In this case, the rectangular ring 52e is formed in a ring shape as shown in the drawing, and is detachably connected to at least one of both sides of the helical sleeve 52a by the connector. Thus, the angular ring 52e can be connected to the spiral sleeve 52a, if desired. Since the prismatic ring 52e is manufactured separately from the helical sleeve 52a, the manufacturing process of the helical sleeve 52a can be shortened, thereby improving the production rate of the helical sleeve 52a.

The connector may comprise, for example, a connection block 60 as shown in Fig. As shown in the drawing, the connecting block 60 is formed with fitting grooves 61 on both sides of the outer circumferential surface of the helical sleeve 52a and the outer circumferential surface of the rectangular ring 52e. Accordingly, since the spiral sleeve 52a and the rectangular ring 52e are fitted into the fitting grooves 61 on both sides of the connecting block 60, they are integrally connected. In this connecting block 60, the helical sleeve 52a and the rectangular ring 52e are fitted into the fitting groove 61 with interference fit. Therefore, the connection block 60 is not separated from the spiral sleeve 52a or the rectangular ring 52e even if concrete is placed in the form MD.

The connector may be constituted by a conventional band clamp or a wire not shown, unlike the above. The band clamp and the wire are wound on the outer circumferential surface of the helical sleeve 52a and the outer circumferential surface of the rectangular ring 52e to integrally connect the helical sleeve 52a and the rectangular ring 52e.

Here, the angular ring 52e described above may be permanently fixed to the helical sleeve 52a by welding, as described above.

14, when the helical sleeve 52a is formed in a circular shape, the rectangular ring 52e may be formed of a triangular to octagonal annular member having a width corresponding to the diameter of the helical sleeve 52a have. In the description, the rectangular ring 52e is formed as a rectangular shape as shown in Figs. 15 and 16 as an example thereof. The quadrangular ring 52e may be extended to at least one of both ends of the circular helical sleeve 52a, and may be permanently fixed to the helical sleeve 52a. Alternatively, the square ring 52e may be detachably and detachably connected to both ends of the helical sleeve 52a through the connector described above. Consequently, the rectangular ring 52e and the helical sleeve 52a can be formed with the same diameter or width. In this case, since the square ring 52e and the spiral sleeve 52a are made of the same diameter or width, they can be manufactured using the same or similar equipment, so that the manufacture is easy. However, the square ring 52e may be formed of a diameter D having a width different from the diameter d of the helical sleeve 52a as described above.

On the other hand, when the separable rectangular ring 52e is constituted by a diameter D having a width larger than the diameter d of the helical sleeve 52a as shown in Fig. 17, the helical sleeve 52a and the diameter D, it is difficult to be fixed to both ends of the spiral sleeve 52a through the above-described connector. In this case, the helical sleeve 52a can be connected to the square ring 52e via the diameter ring R with the diameter ring R as shown.

The diameter ring R is formed to have the same diameter as the diameter D corresponding to the width of the square ring 52e, that is, the diameter D of the square ring 52e as shown in Fig. 17, and the diameter of the spiral sleeve 52a Or the like. It is preferable that the diameter ring R is formed at both ends of the helical sleeve 52a as shown in the figure. Of course, the diameter ring R is formed at the end of the spiral sleeve 52a as it is molded together when the spiral sleeve 52a is molded. The diameter ring R is detachably connected to the prismatic ring 52e by the above-described connector, for example, via the above-described connecting block 60 as shown. At this time, the connecting block 60 integrally connects the diameter-increasing ring R and the square-ring 52e as the diameter-increasing ring R and the square-shaped ring 52e are forcedly inserted into the fitting grooves 61 on both sides . Thus, the connecting block 60 comprises a spiral sleeve 52a and a prismatic ring 52e as an integrated module.

The bulging ring R may be manufactured separately from the helical sleeve 52a as described above and integrally connected to the helical sleeve 52a and the prismatic ring 52e through the aforementioned connector. That is, the diameter ring R is fixed to the end of the helical sleeve 52a by one of the connectors and can be connected to the square ring 52e through the other connector. Therefore, the diameter ring R forms a module integrated with the helical sleeve 52a and the rectangular ring 52e.

As shown in FIG. 12, the rigid reinforcing device 50 according to the embodiment of the present invention constructed as described above has a structure in which a hole 51 is inserted into a spiral sleeve 52a and fixed, . Accordingly, the rigidity reinforcing device 50 is easy to store and install.

When the spiral sleeve 52a is formed to have a diameter d corresponding to the outer circumferential surface of the tube 51, the tube 51 is easily fixed to the inner tube as the tube 51 is constrained. That is, the spiral sleeve 52a is fixed to the pipe tube 51 without a separate fixing member. Since the helical sleeve 52a is composed of a helical coil, it is fixed to the outer circumferential surface of the tube 51 along the longitudinal direction of the tube 51 as shown in Figs. 12 and 20.

The rigidity reinforcing device 50 is formed by a support provided at both ends of the helical sleeve 52a as shown in Figs. 12, 13 and 14 (c) and 15, (MD). That is, the helical sleeve 52a is set up by the aforementioned angular bending muscle 52c, the horizontal muscle 52d, or the rectangular ring 52e. At this time, the rigid reinforcing device 50 is installed between the strip roots S laid on the main rope M of the beam CB as shown in Figs. 9 and 20. 9 and 20, the rigidity reinforcing device 50 is formed so that the perforated pipe 51 and the helical sleeve 52a are arranged in a direction perpendicular to the longitudinal direction of the beam CB, that is, in the longitudinal direction of the main shaft M And is installed inside the form (MD).

The rigidity reinforcing device 50 is constructed such that the outer circumferential surface of the porous tube 51 excluding both ends of the porous tube 51 and the outer peripheral surface of the spiral sleeve 52a ) Is embedded in the concrete (C). Accordingly, the rigid reinforcing device 50 provides the hole CB with the hole H as shown in Fig. 19 when the mold CB is cured and the mold MD is removed. Such a rigid reinforcing device 50 may be formed of a plurality of rigid reinforcing devices 50 and may provide a plurality of holes H to the beams CB as shown in FIG. 19 when the rigid reinforcing devices 50 are installed in a mold MD.

The stiffness reinforcing device 50 is designed such that when the shearing force F is transferred through the beam CB as shown by the arrow in Fig. 18, the shearing force F, which is the shear force of the spiral sleeve 52a, Shear resistance is generated and a shear resistance is generated with respect to the shearing force F. Therefore, the rigidity reinforcing device 50 restrains cracks from being generated even if cracks occur in the beams CB.

To explain this operation easily, the shearing force F is transferred and dispersed along the shape of the helical sleeve 52a when it is transferred to the beam CB. Accordingly, the rigidity reinforcing device 50 suppresses cracks generated by the shearing force F from spreading as the shearing force F is dispersed. Accordingly, the rigid reinforcing device 50 may suppress substantially the shear force F from passing through the center of the hole H as the shearing force F is dispersed, It is also possible to substantially suppress the formation of through holes.

In addition, the rigid reinforcing device 50 generates a shear resistance with respect to the shearing force F through the supporting leg, for example, through the angled bent ridge 52c or the rectangular ring 52e, H) in the first embodiment. At this time, the shearing force F is dispersed through the support member like the spiral sleeve 52a. As a result, the shear cracks due to the shearing force F are mainly generated outside the holes H, as shown in Fig. In other words, the crack due to the shear force mainly occurs on the lateral side of the hole H, as shown in the drawing.

As shown in Fig. 19, when the shear cracks are generated finely at the periphery (side) of the hole H, only the surface cracking of the concrete coating is generated. This is because the rigidity reinforcing device 50 prevents shear cracks from spreading due to the shearing force of the spiral sleeves 52a and the supports when shearing cracks are generated by the shear force. Particularly, the rigid reinforcing device 50 is different from the conventional one in that the helical sleeve 52a is continuously provided from the front end to the rear end of the porous pipe 51 together with the support rod to provide the shear resistance along the axial direction of the porous pipe 51, Cracks can be prevented from occurring. Therefore, even if the holes CB are composed of a single or a plurality of holes H, the holes CB are protected from shear cracks by the rigid reinforcing device 50.

As a result, in the case of the beam CB having the hole H, the crack due to the shearing force passes through the center of the hole H and proceeds to the opposite side of the hole H when the rigid reinforcing device 50 is not present, The shear cracks gradually open with the hole H due to the weakened stiffness due to the loss cross section due to the hole H. Therefore, the beam CB having the hole H can be easily reduced in strength and rigidity, deflection, and the like. However, when the rigid reinforcing device 50 described above is provided, the beam CB having the hole H can not substantially pass through the hole H as described above, It is possible to minimize the deterioration of the proof stress and rigidity and prevent the occurrence of structural defects such as deflection.

16, when the rectangular ring 52e is connected to the helical sleeve 52a by a connector such as the connecting block 60 as shown in FIG. 16, the rigid reinforcing device 50 may be provided with a square ring 52e And can be connected to the helical sleeve 52a. That is, the rigid reinforcing device 50 can selectively apply the rectangular ring 52e according to the required strength.

When the diameter of the rectangular ring 52e is larger than the diameter of the spiral sleeve 52a constituted by the circular spiral coil, the rigidity reinforcing device 50 corresponds to the diameter of the rectangular ring 52e as shown in Fig. 17 So that the square ring 52e can be connected to the spiral sleeve 52a even if the spiral sleeve 52a has various diameters.

On the other hand, the spiral sleeve 52a may be installed in the beam CB without the above-described hole 51. That is, the rigid reinforcing device 50 according to the present invention can be composed only of the shear reinforcement 52 composed of the spiral sleeve 52a. In this case, the spiral sleeve 52a is normally installed in a buried state in the hole of the beam CB formed with the hollow H by a cylindrical die (not shown) forming a hole H in the beam CB. At this time, the spiral sleeve 52a can be embedded with the above-described support bar.

The helical sleeve 52a continuously provides a shear resistance force along the longitudinal direction of the hole H formed in the width direction of the beam CB in the inside of the beam CB in the absence of the hole 51, The shearing force acting along the longitudinal direction of the hollow portion H is imposed to prevent cracking of the pierced portion due to the shearing force F as described above or to prevent the generated crack from spreading. However, it is preferable that the spiral sleeve 52a is installed in the beam CB in a state where the above-described hole 51 is inserted so as not to perform the installation and disassembly of the cylindrical mold (not shown).

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to be illustrative of the present invention and are not intended to limit the scope of the present invention. Change, partial omission, or supplement). In addition, the above-described embodiments may combine some or many of the features with each other. Therefore, the structure and configuration of each component shown in the embodiments of the present invention can be implemented by modifications or combinations, and it goes without saying that modifications and combinations of these structures and configurations fall within the scope of the appended claims of the present invention.

50: rigidity reinforcing device 51:
52: shear stiffener 52a: spiral sleeve
52c: angular bending 52d: horizontal bend
52e: square ring 60: connecting block
61: fitting groove

Claims (11)

And is continuously installed in the inside of the beam along the longitudinal direction of the hole in a state of being embedded in a concrete beam having a through hole penetrated in the width direction and prevented from being exposed to the outside of the beam, And a shear reinforcement made of a rigid material that provides shear resistance,
Wherein the shear reinforcement comprises:
A shear resistance force is applied to a shear force acting on the pierced portion of the beam and a shear force is applied to the pierced portion of the beam, And a spiral sleeve,
Wherein the shear reinforcement comprises:
And a support table for supporting the lower portion of the spiral sleeve to stand the spiral sleeve,
[0028]
And a rectangular ring connected to at least one of both sides of the helical sleeve and formed of any one of triangular to octagonal shapes,
Wherein the prismatic ring comprises:
Wherein the spiral sleeve is separated from the spiral sleeve and is detachably connected to at least one of the sides of the spiral sleeve by a connector,
Wherein the connector comprises:
A connecting block formed on both sides of the outer circumferential surface of the helical sleeve and the fitting groove fitted in the outer circumferential surface of the prismatic ring,
Wherein the prismatic ring comprises:
And has a diameter corresponding to the diameter of the spiral sleeve or larger than a diameter of the spiral sleeve,
The connecting block includes:
And the outer circumferential surface of the helical sleeve and the outer circumferential surface of the prismatic ring are inevitably interference fit on both sides of the fitting groove. delete delete delete delete delete delete delete delete delete delete

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