JPH0442422Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a shear reinforcing device using ties for reinforced concrete columns.

(Prior Art) Fig. 3 shows a conventional shear reinforcing device for a reinforced concrete column S, in which the corner main reinforcement a and the intermediate main reinforcement b arranged along each side of the column S have a rectangular plane. The outer tie reinforcement A surrounds the diamond-shaped inner tie reinforcement B between each intermediate main reinforcement B, and this shear reinforcement method that combines the reinforcement reinforcement A and B is extremely effective in improving the toughness of the column. It is said to be effective.

Therefore, in the conventional reinforcement arrangement method, before assembling the column main reinforcements a and b, as shown in Fig. 5, square outer reinforcements A and
As shown in FIG. 4, diamond-shaped inner straps B, which are curved with both ends pointing inward and overlapping at the corners, are alternately overlapped on the columnar reinforcement legs, and then the sixth
The column main reinforcements a and b are assembled as shown in the figure, and the tie reinforcements A and B are pulled up to predetermined positions as shown in FIG. 7 to complete the reinforcement arrangement.

(Problems to be solved by the invention) In the conventional shear reinforcing method for reinforced concrete columns, the tie bars B are closed types as shown in Figure 4, so it is difficult to arrange the reinforcements after the main reinforcements have been assembled. .

If the stirrup A is in the shape of a rectangular frame, it is possible to alternately overlap the stirrups A and B as described above and then arrange the column main reinforcements a and b. When using spiral hoops, it is extremely difficult to overlap them alternately with the ties B.

Therefore, when spiral hoops are used for stirrup A, the conventional reinforcement arrangement method is to place the main column reinforcements a and b, then place the spiral hoops at predetermined positions, and then add the reinforcements B. . Since the main column reinforcements a and b have already been arranged, the band reinforcement B is formed into a reinforcement shape as shown in Fig. 8 or 9.
After reinforcing, the ends B' of the reinforcing bars B are bent or welded as shown by dotted lines.

This method requires a lot of effort and is expensive.

(Means for solving the problem) The present invention was proposed to solve the above problem. Each corner part of a pair of opposing shear reinforcing bars and the bent part of the claw pieces are connected to the intermediate column main reinforcement arranged at the middle part of each side of the reinforced concrete column. The present invention relates to a shear reinforcing device for a reinforced concrete column, characterized in that the claw pieces of the opposing shear reinforcing bars and the pieces sandwiching the corner portion are overlapped with each other.

(Function) In the present invention, the inner strap is formed by forming a pair of opposing claw pieces, which are formed by bending claw pieces perpendicular to each piece on the free ends of a pair of pieces sandwiching a corner of the L-shaped piece. Since it is composed of release type shear reinforcing bars in the shape, even if the column main reinforcements are already arranged, the corner portions of the opposing shear reinforcing bars and the bent portions of the claw pieces can be respectively locked to the intermediate column main reinforcements. In this case, the claw pieces of the shear reinforcing bar overlap with the pieces that sandwich the corner of the opposite shear reinforcing bar, so the claw pieces should be made sufficiently long. In this way, the reinforcing effect can be improved.

(Example) The present invention will be described below with reference to the illustrated embodiments.

Figure 2 shows a shear reinforcing bar used in the reinforcing device of the present invention, in which claw pieces 3 are bent at the free ends of a pair of pieces 2, 2 that sandwich a corner 1, and are perpendicular to each piece 2. The shear reinforcing bars 4 are constituted by the reinforcement bars 4.

Note that the length of the claw piece 3 is 10 times or more the diameter of the reinforcing bar, so as to improve the reinforcing effect.

Thus, the pair of left and right shear reinforcing bars 4, 4 constitute the inner band of the main column reinforcement, and each corner 1 of both shear reinforcing bars 4 is locked to the opposing pair of intermediate column reinforcements b, b. ,
The bent portion 5 of each claw piece 3 is locked to the other pair of opposing intermediate column reinforcements b, b, and the claw piece 3 of one shear reinforcing bar 4 is
is superimposed on the piece 2 sandwiching the corner part 1 of the other shear reinforcing bar 4, and thus the pair of shear reinforcing bars 4 are used to assemble the inner band of the column main bar, thereby shear reinforcing the reinforced concrete column.

(Effect of the invention) According to the invention, a pair of shear reinforcements are obtained by bending claw pieces perpendicular to each free end of the pair of pieces sandwiching the corner of the L-shaped piece. By using reinforcing bars, even after the main reinforcement of a column is assembled, inner band reinforcement can be easily assembled and arranged on the same main reinforcement, eliminating the need for post-bending or welding work after reinforcement, and improving the shear reinforcement effect of reinforced concrete columns. It is.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an embodiment of the shear reinforcement device for reinforced concrete columns according to the present invention, Fig. 2 is a plan view of shear reinforcement bars, Fig. 3 is a cross-sectional plan view of the reinforced concrete column, and Fig. 4 is a conventional Figures 5 to 7 are front views showing the process of reinforcing the reinforcement, and Figures 8 and 9 are plan views showing the state of the conventional reinforcement reinforcement. be. 1...corner part, 2...piece, 3...nail piece, 4...
...Shear reinforcing bar, 5...Bend portion of claw piece, S...Reinforced concrete column, b...Main bar of intermediate column.

Claims (1)

[Scope of utility model registration request] Bending of the corner parts and claw pieces of a pair of opposing shear reinforcing bars, which are formed by bending claw pieces perpendicular to the respective pieces on the free ends of a pair of pieces sandwiching the corner parts of the L-shaped piece. Each section is locked to the main reinforcement of the intermediate column arranged at the middle part of each side of the reinforced concrete column, and the claw piece of the opposing shear reinforcing bar and the section sandwiching the corner section are overlapped. A shear reinforcement device for reinforced concrete columns.