JP2013213344A - Bar arrangement structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bar arrangement structure that can be simplified and can also restrain the bulging of a main reinforcing bar.SOLUTION: A bar arrangement structure 1 includes a main reinforcing bar 20 and a distributing bar 30 arranged in a concrete member C, and a bulging restraining member 10 arranged inside the main reinforcing bar 20 and the distributing bar 30. The bulging restraining member 10 includes a frame part 12 arranged at an interval from the main reinforcing bar 20 and the distributing bar 30, and an engaging part 11 whose one end is engaged with the distributing bar 30 and the other end is fixed to the frame part 12.

Description

  The present invention relates to a bar arrangement structure.

When a reinforced concrete structure is repeatedly subjected to large deformations due to an earthquake or the like, the main reinforcing bar arranged inside may protrude.
When the main reinforcing bar protrudes, the proof stress and deformation capacity of the concrete structure decrease, and therefore, many bar arrangement structures that suppress the protruding main reinforcing bar have been proposed.

  For example, Patent Literature 1 discloses a bar arrangement structure in which shear reinforcing reinforcing bars are arranged along a cross-sectional direction of a member, and both ends of the shear reinforcing reinforcing bars are locked to a main reinforcing bar or a band reinforcing bar surrounding the main reinforcing bar. . At both ends of the shear reinforcing bar, a hook portion or a locking plate for locking to the main reinforcing bar or the band reinforcing bar is formed.

  Further, in Patent Document 2, a holding member in which a plurality of rod-shaped fixing members protrude on one surface side of a plate is disposed on the surface side of the main reinforcing bar with the fixing member inserted between the reinforcing bars. A bar arrangement structure that suppresses the protrusion of main reinforcing bars is disclosed.

JP 2004-263556 A Japanese Patent No. 3755058

The bar arrangement structure of Patent Document 1 requires time and labor for arranging a large number of shear reinforcing bars.
Further, the bar arrangement structure of Patent Document 2 may increase the bending strength of the concrete member because the plate shares the axial stress. When the bending strength increases, the bending shear strength ratio is affected, and the concrete member is liable to be sheared, so that the deformation performance may be lowered. In addition, in the case of a rod-shaped fixing member, fixing at the tip may be insufficient.

  The present invention solves the above-described problems, and it is an object of the present invention to propose a bar arrangement structure that can be easily configured and can suppress the protrusion of main reinforcing bars. .

  In order to solve the above-described problem, a first bar arrangement structure of the present invention includes a reinforcing bar arranged in a concrete member, and a protrusion suppressing member disposed inside the reinforcing bar, The protrusion control member includes a frame portion disposed at a distance from the reinforcing bar, and a locking portion having one end locked to the reinforcing bar and the other end fixed to the frame portion. It is characterized by being.

  In addition, the said frame part may be formed with the reinforcing bar by which the bending process was given, and may be formed with the plate-shaped member.

According to the first bar arrangement structure, since the protrusion suppressing member is three-dimensionally formed by the locking portion and the frame portion, the protrusion suppressing member can be easily installed and fixed. Further, it is possible to prevent the position of the protrusion control member from shifting when the concrete is placed.
Moreover, since the frame portion is disposed with a space inside the reinforcing bar without providing a steel material along the reinforcing bar, the frame portion does not contribute to the bending strength of the concrete member. Therefore, the deformation performance of the concrete member is not deteriorated by disposing the protrusion suppressing member.

  Further, the second bar arrangement structure includes a reinforcing bar arranged in a concrete member, and a protrusion control member disposed outside the reinforcing bar, and the protrusion control member is bent. It is made of a steel rod having a convex part and a straight part formed by the above, the linear part is in contact with the outside of the two adjacent reinforcing bars, and the convex part is arranged inside the reinforcing bar It is characterized by.

According to the second bar arrangement structure, since the installation of the protrusion control member is completed simply by inserting the convex portion between the reinforcing bars, it is easy to install and fix the protrusion control member.
Moreover, since the protrusion control member does not include a continuous portion along the longitudinal direction of the reinforcing bar, it does not contribute to the bending strength of the concrete member. Therefore, the deformation performance of the concrete member is not deteriorated.

  Further, the third reinforcing bar structure includes an outer main reinforcing bar and an outer reinforcing bar arranged along the outer surface of the concrete member, and an inner main reinforcing bar arranged in parallel to the outer main reinforcing bar and the outer reinforcing bar. And an inner force distribution bar, and a protrusion suppressing member that connects the outer main reinforcing bar and the inner main reinforcing bar, and the protrusion suppressing member surrounds a plurality of the inner main reinforcing bars. It has a U-shape, and both ends of the protrusion control member are locked to the outer main reinforcing bar or the outer force distribution bar.

  According to the third bar arrangement structure, it is possible to effectively prevent the main reinforcing bar from protruding in the multistage bar arrangement structure. Since the protrusion control member is disposed only in the multistage reinforcing bar, the construction is easy. Further, since the member length can be short, the material cost can be reduced. In the present specification, the “multi-stage reinforcement structure” refers to a structure in which reinforcing bars are multi-stage reinforcement (for example, double reinforcement) on each of the surface side and the back side of the concrete member.

  ADVANTAGE OF THE INVENTION According to this invention, the bar arrangement structure which suppresses the protrusion of a main reinforcing bar can be comprised simply.

It is a figure which shows the bar arrangement structure which concerns on 1st embodiment, Comprising: (a) is a perspective view of a bar arrangement structure, (b) is a longitudinal cross-sectional view of the concrete member reinforced by the bar arrangement structure. It is a figure which shows the other form of the bar arrangement structure shown in FIG. 1, Comprising: (a) is a perspective view, (b) is sectional drawing. It is a figure which shows the other form of the bar arrangement structure shown in FIG. 1, Comprising: (a) is a perspective view, (b) is sectional drawing. It is a figure which shows the bar arrangement structure which concerns on 2nd embodiment, Comprising: (a) is a perspective view of a bar arrangement structure, (b) is a plane sectional view of the concrete member reinforced by the bar arrangement structure. It is a figure which shows the other form of the bar arrangement structure shown in FIG. 4, (a) is a perspective view of a bar arrangement structure, (b) is an elevation view of the bar arrangement structure, (c) is the bar arrangement structure It is a plane sectional view of a concrete member reinforced by. It is a figure which shows the bar arrangement structure which concerns on 3rd embodiment, Comprising: (a) is a perspective view of a bar arrangement structure, (b) is a plane sectional view of the concrete member reinforced by the bar arrangement structure. It is a figure which shows the bar arrangement structure which concerns on 4th embodiment, Comprising: (a) is a perspective view of bar arrangement structure, (b) is a plane sectional view of the concrete member reinforced by the bar arrangement structure.

Hereinafter, embodiments of the present invention will be described.
The bar arrangement structure 1 according to the first embodiment is a reinforcing material embedded in a concrete member, and as shown in FIG. And an ejection restraining member 10.

  The main reinforcing bar 20 of this embodiment is arranged vertically. In addition, the direction of the main reinforcement 20 is not limited.

  The reinforcing bars 30 are arranged sideways so as to intersect the main reinforcing bars 20. In addition, what is necessary is just to determine the direction of the distribution bar 30 suitably according to the direction of the main reinforcing bar 20.

The protrusion control member 10 is disposed inside the main reinforcing bar 20 and the distribution bar 30 and is locked to the distribution bar 30.
The protrusion suppressing member 10 includes a plurality of locking portions 11, 11,... And a frame portion 12.

  The locking part 11 is made of a reinforcing bar, and a J-shaped hook 11a is formed on the outer end (one end) of the locking part 11 by bending. An L-shaped fixing portion 11b is formed at the end portion by applying a bending frame.

  The locking part 11 is horizontally mounted on the power distribution bar 30 and the frame part 12 by locking the hook 11 a to the power distribution bar 30 and welding the fixing part 11 b to the frame part 12. In addition, the fixing method to the frame part 12 of the fixing | fixed part 11b is not limited. In addition, when the reinforcing member 11 has multistage reinforcing bars arranged in the concrete member C (when a plurality of reinforcing bars are juxtaposed in the thickness direction of the concrete member C), the locking portion 11 is horizontally mounted on the plurality of reinforcing bars. Instead, only one end is locked to the reinforcing bar, and the other end is disposed at a position between the two reinforcing bars. That is, the latching | locking part 11 is not overlaid by the some reinforcing bar (the main reinforcing bar 20 or the distribution bar 30) arranged in parallel.

The frame portion 12 is disposed inside the main reinforcing bar 20 and the distributing bar 30 and at a position spaced from the main reinforcing bar 20 and the distributing bar 30. When the reinforcing bars are arranged in multiple stages on the concrete member C, the frame portion 12 is disposed between both reinforcing bars.
As shown in FIG. 1B, the frame portion 12 is disposed in parallel to the surface of the concrete member C inside the main reinforcing bar 20 and the distribution bar 30.

  The frame part 12 is comprised by the reinforcing bar formed in the rectangular shape by giving a bending process. In addition, the material which comprises the frame part 12 is not limited to a reinforcing bar, For example, the steel material formed in frame shape may be sufficient.

  A plurality of locking portions 11, 11,... Are fixed to the outside of the frame portion 12. As shown in FIG. 1A, the frame portion 12 is fixed with two rows of locking portions 11, 11,... In the horizontal direction and in the vertical direction. In addition, the number and arrangement | positioning of the latching | locking part 11 fixed to the frame part 12 are not limited. In the present embodiment, the force distribution bars 30, the interval and the vertical interval of the locking portions 11, 11,... Are the same interval, but the vertical interval of the locking portion 11 is not limited. It may be twice the interval between the strength bars 30.

The lateral width of the frame portion 12 of this embodiment (the length along the axial direction of the force distribution bars 30) is formed to be the same size as the interval between the adjacent main reinforcing bars 20, 20.
The protrusion suppressing member 1 is disposed in a state where the hook 11 a of the locking portion 11 is locked to the distribution bar 30, and the locking portions 11, 11 adjacent to the left and right fixed to the frame portion 12. However, it is arrange | positioned in the state which adjoined to the two main reinforcing bars 20 and 20 which adjoin each other.

  The protrusion suppressing member 10 may sandwich the two main reinforcing bars 20, 20 between the locking portions 11, 11, or sandwich three or more main reinforcing bars 20, 20 between the pair of locking portions 11, 11. You may go out. Moreover, the shape dimension of the frame part 12 is not limited.

According to this embodiment, since the protrusion suppressing member 10 formed in three dimensions by the locking portions 11, 11,... The bar arrangement structure 1 is formed. Therefore, even if the concrete member C is subjected to large repeated deformation due to an earthquake or the like, it is possible to prevent the main rebar 20 from buckling (deformation that protrudes).
Since the pull-out suppressing member 10 increases the pull-out resistance force not only by the adhesion force of the locking portion 11 but also by the adhesion force or the support pressure of the frame portion 12, it can effectively suppress the protrusion of the main reinforcing bar 20. it can.

  Since the frame portion 12 is disposed at an interval inside the main reinforcing bar 20 of the concrete member C, it does not contribute to the bending strength of the concrete member C. That is, even if the protrusion suppressing member 10 is provided, the bending strength does not increase, and as a result, the concrete member C can be prevented from being easily broken by shear.

Since the protrusion suppressing member 10 itself is formed in a three-dimensional manner, the reinforcing bar structure 1 is fixed in a three-dimensional manner by locking the main reinforcing bar 20 or the reinforcing bar 30 and fixing it with a binding wire. Thus, it is possible to sufficiently resist the pressure of the concrete at the time of placing the concrete and to maintain the position.
In the present embodiment, the case where the protrusion suppressing member 10 is locked to the distribution bar 30 has been described, but the protrusion suppressing member 10 may be locked to the main reinforcing bar 20.

  Moreover, in this embodiment, although the reinforcing bar formed in the rectangular shape was used as the frame part 12, the shape of the frame part 12 is not limited to a rectangle. For example, as shown in FIG. 2, a frame portion 12 formed in a saw blade shape (zigzag shape) by continuously bending a reinforcing bar into a dogleg shape may be employed. Moreover, as shown in FIG. 3, you may employ | adopt the frame part 12 formed in the uneven | corrugated shape by bending a reinforcing bar continuously in a U-shape (crank shape).

  Moreover, the shape of the edge part of the latching | locking part 11 does not necessarily need to be the shape shown above, for example, you may bend both ends in L shape, and the plate may be fixed to the edge part.

  As shown in FIG. 4A, the reinforcing bar structure 2 according to the second embodiment includes a main reinforcing bar 20, a distribution bar 30, and a protrusion suppressing member 10.

  In addition, since the main reinforcement 20 and the power distribution bar 30 which concern on 2nd embodiment are the same as that of what was shown in 1st embodiment, detailed description is abbreviate | omitted.

  The protrusion control member 10 is a steel bar having a convex portion 13 and a straight portion 14 formed by bending.

The straight portion 14 is in contact with the outside of the two adjacent main reinforcing bars 20, 20, and the convex portion 13 extends inward from between the two adjacent main reinforcing bars 20, 20. It is arranged inside the reinforcing bar 20.
The protrusion suppressing member 10 is fixed to the main reinforcing bar 20 by a binding wire or the like (not shown) and is fixed to a fall-preventing steel material 15 fixed to the main reinforcing bar 20.

  As shown in (b) of FIG. 4, the convex portion 13 is formed in a V shape, and the distal end reaches the middle of the concrete member C in the plan view (the central portion in the thickness direction of the concrete member C). It has a certain height (projection length). In addition, the shape dimension of the convex part 13 is not limited.

The straight portion 14 is formed to have a length larger than the interval between the adjacent main reinforcing bars 20, 20.
When the protrusion suppressing member 10 is locked to the main reinforcing bars 20, 20,..., The adjacent two main reinforcing bars 20, 20 are sandwiched by the adjacent convex portions 13, 13.

According to this embodiment, since the protrusion suppression member 10 having the convex portion 13 is locked to the main reinforcing bar 20, the bar arrangement structure 1 is formed in a three-dimensional manner. Therefore, even if the concrete member C is subjected to large repeated deformation due to an earthquake or the like, it is possible to prevent the main rebar 20 from buckling (deformation that protrudes).
That is, the protrusion suppressing member 10 has an increased resistance due to the adhesion force of the convex portion 13 and can effectively suppress the protrusion of the main reinforcing bar 20.

  Moreover, since the protrusion control member 10 can be installed by work only from the surface side of the main reinforcing bar 20, it is excellent in workability.

  In the present embodiment, the case where the protrusion suppressing member 10 is disposed so as to be parallel to the distribution bar 30 and is locked to the main reinforcing bar 20 has been described. It may be locked to the muscle 30. In this case, the protrusion suppressing member 10 may be disposed in parallel with the main reinforcing bar 20. In addition, since the protrusion 13 formed in the V shape absorbs the deformation, the protrusion suppression member 10 is bent of the concrete member C even when the protrusion suppression member 10 is arranged along the main reinforcing bar 20. Yield does not increase.

  The protrusion preventing member 10 is three-dimensionally fixed by the fall-preventing steel material 15, so that it can sufficiently resist the pressure of the concrete at the time of placing the concrete and can maintain the position.

  Since the protrusion control member 10 does not include a vertical member disposed along the main reinforcing bar 20, the bending strength of the concrete member C is not increased. That is, even if the protrusion suppressing member 10 is provided, the deformation performance of the concrete member C does not deteriorate.

In the present embodiment, the case where the convex portion 13 and the straight portion 14 are linear in the side view has been described. However, as shown in FIG. May be different. In this case, the convex part 13 is arrange | positioned diagonally with respect to the power distribution muscle 30 (refer FIG.5 (b)).
If the protrusion control member 10 is formed in a three-dimensional manner, the buckling of the main reinforcing bar 20 can be more effectively prevented. Moreover, since the linear part 14 inclines with respect to the main reinforcing bar 20, and the protrusion suppression member 10 is not provided with the vertical member, the bending proof stress of the concrete member C will not be raised. That is, even if the protrusion suppressing member 10 is provided, the deformation performance of the concrete member C does not deteriorate.

  The bar arrangement structure 3 which concerns on 3rd embodiment is a reinforcing material embed | buried inside a concrete member, Comprising: As shown to (a) of FIG. 6, the outer side arranged along the outer surface of a concrete member Main reinforcing bar 21 and outer reinforcing bar 31, inner main reinforcing bar 22 and inner distributing bar 32 arranged side by side inside outer main reinforcing bar 21 and outer distributing bar 31, outer main reinforcing bar 21 and inner main reinforcing bar 22 And a protrusion control member 10 for connecting the two.

In the concrete member C, as shown in FIG. 6B, the main reinforcing bars 20 (the outer main reinforcing bar 21 and the inner main reinforcing bar 22) are arranged in two stages on each of the front side and the back side of the concrete member C. It is comprised by what is called a double bar arrangement structure.
The main reinforcing bar 20 of this embodiment is arranged vertically. In addition, the direction of the main reinforcement 20 is not limited.

  The distribution bars 30 (the outer distribution bars 31 and the inner distribution bars 32) are arranged sideways so as to intersect the main reinforcing bar 20. In addition, what is necessary is just to determine the direction of the distribution bar 30 suitably according to the direction of the main reinforcing bar 20.

The protrusion control member 10 is formed by processing a reinforcing bar, and has a U-shape so as to surround the plurality of inner main reinforcing bars 32 and 32.
Hooks 10 a and 10 a are formed at both ends of the protrusion suppressing member 10.

  As shown in FIG. 6A, the protrusion control member 10 connects the inner main reinforcing bar 22 and the outer force distribution bar 31. That is, the protrusion suppressing member 10 surrounds the outer main reinforcing bars 21 and 21 and the inner main reinforcing bars 22 and 22, and the hooks 10 a and 10 a are locked to the outer force distribution bar 31.

According to this embodiment, since the protrusion suppression member 10 is locked to the inner main reinforcing bar 22 and the outer reinforcing bar 31, the reinforcing bar structure 3 connected in a three-dimensional manner as a whole is formed. Therefore, even when the concrete member C is subjected to large repeated deformation due to an earthquake or the like, it is possible to prevent the outer main reinforcing bar 21 from buckling (deformation that protrudes).
The protrusion control member 10 has an increased resistance due to the adhesion force and the support pressure, and can effectively suppress the protrusion.

  In the present embodiment, the case where the hook 10a of the protrusion control member 10 is locked to the outer force distribution bar 31 has been described, but the hook 10a may be locked to the outer main reinforcing bar 21.

  Moreover, the hook 10a does not necessarily have to be formed in the shape of the end portion of the protrusion suppressing member 10. For example, both ends may be bent in an L shape, or a plate may be fixed to the end portion. Good.

  The bar arrangement structure 4 according to the fourth embodiment is a reinforcing material embedded in the concrete member, and as shown in FIG. 7A, the outer bar arrangement is performed along the outer surface of the concrete member. Main reinforcing bar 21 and outer reinforcing bar 31, inner main reinforcing bar 22 and inner distributing bar 32 arranged side by side inside outer main reinforcing bar 21 and outer distributing bar 31, outer main reinforcing bar 21 and inner main reinforcing bar 22 And a protrusion control member 10 for connecting the two.

In the concrete member C, as shown in FIG. 7B, the main reinforcing bars 20 (the outer main reinforcing bar 21 and the inner main reinforcing bar 22) are arranged in two stages on the front side and the back side of the concrete member C, respectively. It is comprised by what is called a double bar arrangement structure.
The main reinforcing bar 20 of this embodiment is arranged vertically. In addition, the direction of the main reinforcement 20 is not limited.

  The distribution bars 30 (the outer distribution bars 31 and the inner distribution bars 32) are arranged sideways so as to intersect the main reinforcing bar 20. In addition, what is necessary is just to determine the direction of the distribution bar 30 suitably according to the direction of the main reinforcing bar 20.

  The protrusion suppressing member 10 has a hook 10a formed at one end and a plate 10b fixed to the other end. The plate 10b has a width larger than the diameter of the reinforcing bars constituting the protrusion suppressing member 10.

  As shown in FIG. 7, the protrusion control member 10 connects the outer force distribution bar 31 and the inner main reinforcing bar 22. That is, in the protrusion suppressing member 10, the hook 10 a is locked to the outer force distribution bar 31 and the plate 10 b is locked to the inner main reinforcing bar 22.

According to this embodiment, since the protrusion suppression member 10 is locked to the inner main reinforcing bar 22 and the outer reinforcing bar 31, the reinforcing bar structure 3 connected in a three-dimensional manner is formed. Therefore, even when the concrete member C is subjected to large repeated deformation due to an earthquake or the like, it is possible to prevent the outer main reinforcing bar 21 from buckling (deformation that protrudes).
The protrusion control member 10 has an increased resistance due to the adhesion force and the support pressure, and can effectively suppress the protrusion.

  Since the protrusion suppressing member 10 can be prevented from buckling the outer main reinforcing bar 21 by disposing the outer main reinforcing bar 22 between the outer reinforcing bar 31 and the inner main reinforcing bar 22 which are multi-staged. Compared with the protrusion control member arranged so as to cross, it is possible to reduce material costs and labor of construction.

  In the present embodiment, the case where the protrusion suppressing member 10 is locked to the inner main reinforcing bar 22 and the outer force distribution bar 31 has been described, but the protrusion suppressing member 10 is related to the inner main reinforcing bar 22 and the outer main reinforcing bar 21. It may be stopped.

  Further, the hook 10a is not necessarily formed in the shape of the end portion of the protrusion suppressing member 10, and for example, the plates 10b and 10b may be fixed to both ends like the protrusion suppressing member 16. .

The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiment, and the above-described components can be appropriately changed without departing from the spirit of the present invention.
The concrete member to which the bar arrangement structure of the present invention is applicable is not limited, and can be applied to any concrete member such as a wall, a beam, a column, a floor slab, an abutment, and a bridge pier.

1, 2, 3, 4 Reinforcement structure 10 Protruding suppression member 11 Locking portion 12 Frame portion 13 Convex portion 14 Straight portion 20 Main reinforcing bar 21 Outer main reinforcing bar 22 Inner main reinforcing bar 30 Power distribution bar 31 Outer reinforcing bar 32 Distribution bar C Concrete member

Claims (3)

A reinforcing bar structure comprising a reinforcing bar arranged in a concrete member, and a protrusion control member arranged inside the reinforcing bar,
The protrusion control member includes a frame portion disposed at a distance from the reinforcing bar, and a locking portion having one end locked to the reinforcing bar and the other end fixed to the frame portion. Reinforcement structure, characterized by A reinforcing bar structure comprising reinforcing bars arranged in a concrete member, and a protrusion control member disposed outside the reinforcing bar,
The protrusion control member is a steel rod having a convex portion and a straight portion formed by bending,
A bar arrangement structure, wherein the straight portion is in contact with the outside of the two adjacent reinforcing bars, and the convex portion is arranged on the inner side of the reinforcing bar. An outer main reinforcing bar and an outer reinforcing bar arranged along the outer surface of the concrete member; an inner main reinforcing bar and an inner reinforcing bar arranged in parallel to the outer main reinforcing bar and the outer distributing bar; and the outer main reinforcing bar. A bar arrangement control member that connects a reinforcing bar and the inner main reinforcing bar,
The protrusion control member has a U-shape so as to surround a plurality of the inner main reinforcing bars,
The bar arrangement structure characterized in that both ends of the protrusion control member are locked to the outer main reinforcing bar or the outer force distribution bar.

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