JP6405070B1 - Seismic reinforcement structure for concrete structure and seismic structure construction method for concrete structure - Google Patents

Abstract

The structure is simple, the interval between a concrete column or concrete beam and a permanent formwork / reinforcement member is made substantially constant, and no void is generated between the permanent formwork / reinforcement member and the solidified solidified material. It aims at providing a concrete structure seismic reinforcement structure and a concrete structure seismic structure construction method.
A horizontal cut surface is formed on the top and bottom of a U-shaped main body part, and an upper and lower flange part extending horizontally inwardly. A permanent formwork / reinforcement member arranged continuously in the vertical direction or the transverse direction, a hole inserted in the body part of the permanent formwork / reinforcement member, the tip is in contact with the surface of the concrete column or concrete beam, and the rear part is An external thread is formed on the whole projecting from the main body, and a space retaining male screw member that keeps the distance between the permanent formwork / reinforcement member and the concrete column or concrete beam constant, and a position within the permanent formwork / reinforcement member, and keeping the space A crimp nut that is screwed onto the male screw member and contacts the inner surface of the permanent mold and reinforcing member, and a solidified material that fills a space between the permanent mold and reinforcing member and the concrete column or concrete beam; Characterized in that it comprises a.
[Selection] Figure 5

Description

  The present invention relates to a seismic reinforcement structure for a concrete structure composed of a concrete column and a concrete beam, and a concrete structure seismic structure construction method.

  Conventionally, a permanent formwork / reinforcement member is arranged around a concrete column or concrete beam, the outside of the permanent formwork / reinforcement member is supported by a support, and the gap between the concrete column or concrete beam and the permanent formwork / reinforcement member A concrete structure seismic reinforcement structure has been proposed in which a solid material such as concrete mortar is filled and solidified to integrate a concrete column or beam and a permanent formwork and reinforcing member.

Japanese Patent Laying-Open No. 2015-86690

  However, in conventional seismic reinforcement structures for concrete structures, it is difficult to make the distance between the concrete column or beam and the permanent formwork / reinforcement member almost constant because there is unevenness on the surface of the concrete column or beam. As a result of the uneven spacing, a space is likely to be generated between the solidified material and the permanent mold / reinforcement member in the process of filling and solidifying the solidified material, and the presence of voids significantly reduces the seismic performance. However, there is a problem that the installation and removal work takes time, and the cost is high.

  The present invention solves the problems of the prior art, has a simple structure, makes the interval between the concrete column or concrete beam and the permanent formwork / reinforcement member substantially constant, and solidifies the permanent formwork / reinforcement member and the solidified material. It aims at providing a concrete structure seismic strengthening structure and a concrete structure seismic structure construction method which does not generate a space between them.

  In order to solve the above-mentioned problem, the concrete structure seismic reinforcement structure of the present invention forms upper and lower flange portions that extend horizontally inwardly on the upper and lower sides of the U-shaped main body portion, and on the front and side surfaces of the main body portion. A permanent mold and reinforcing member that is formed in a hole and is arranged in a continuous manner in the vertical or horizontal direction around a concrete column or concrete beam, and a hole formed in the main body of the permanent mold and reinforcing member A spacing male screw member that is inserted and has a tip contacting the surface of the concrete column or concrete beam, and a rear portion protruding from the main body to form a male screw, and maintaining a constant distance between the permanent formwork / reinforcing member and the concrete column or concrete beam. A crimping nut positioned in the permanent mold / reinforcement member and screwed to the spacing male screw member to contact the inner surface of the main body of the permanent mold / reinforcement member; Characterized in that it comprises a solidifying material is filled in a gap Ried pillars or concrete Harima, a.

  Moreover, the concrete structure seismic reinforcement structure of the present invention is characterized in that it is provided with a continuous positioning claw that is fixed to any one of the top and bottom flange portions.

  In addition, the concrete structure seismic reinforcement structure of the present invention includes a continuous fiber sheet disposed on the outer periphery of the permanent formwork / reinforcement member via an adhesive.

  Moreover, the concrete structure seismic reinforcement structure construction method of the present invention is a longitudinal direction or a lateral direction in which the permanent formwork / reinforcing member according to claim 1 or 2 is paired facing each other around a concrete column or a concrete beam. And a crimping nut arranged in the permanent mold / reinforcing member is screwed to the end of the interval holding male screw member in which the male screw is formed entirely from the hole formed in the main body of the permanent mold / reinforcing member. And inserting until the tip part contacts the surface of the concrete column or concrete beam, rotating the spacing male screw member and raising the crimping nut to a position where it comes into contact with the inner surface of the main body of the permanent mold and reinforcement member; Cutting and removing the portion of the male screw member for spacing and supporting fixing that protrudes from the surface of the permanent mold / reinforcement member so that the cut surface is flush with the surface of the permanent mold / reinforcement member; A step of arranging a continuous fiber sheet on the outer periphery of the formwork / reinforcement member via an adhesive, and a step of filling the gap between the concrete column or concrete beam and the permanent formwork / reinforcement member with a solidification material, and solidifying the solidification material And.

A horizontal cut surface is formed on the upper and lower sides of the U-shaped main body part, and the upper and lower flange parts extend horizontally inward, and holes are formed on the front and side surfaces of the main body part to face each other around the concrete column or concrete beam in the vertical direction or Permanent formwork / reinforcement member arranged continuously in the horizontal direction, inserted from the hole formed in the main part of the permanent formwork / reinforcement member, the tip is in contact with the surface of the concrete column or concrete beam, and the rear part protrudes from the body part An external thread is formed on the entire surface, and a space holding male screw member that keeps the distance between the permanent formwork / reinforcement member and the concrete column or concrete beam constant, and a position within the permanent formwork / reinforcement member, and is screwed into the space retention male screw member. A crimping nut attached to the inner surface of the main body of the permanent formwork / reinforcement member, and a solidifying material filled in a space between the permanent formwork / reinforcement member and the concrete column or concrete beam. Thus, it is easy to assemble and connect, and despite the presence of unevenness on the surface of the concrete column or concrete beam, the interval between the concrete column or concrete and the beam and the permanent formwork / reinforcement member can be kept almost constant, It is possible to prevent gaps between the concrete pillars or concrete beams and the permanent formwork / reinforcement member after solidifying the solidified material. The anchor function between the permanent formwork / reinforcing member and the concrete column or beam can be exhibited by fixing to the support.
By providing a continuous positioning claw that is fixed to any one of the top and bottom flange portions, it is possible to accurately position in the vertical direction or the horizontal direction.
By providing the continuous fiber sheet disposed on the outer periphery of the permanent formwork / reinforcing member via an adhesive, it is possible to improve energy attenuation and tensile strength during an earthquake.
A step of arranging a pair of permanent formwork / reinforcement members according to claim 1 around a concrete column or a concrete beam in a longitudinal or lateral direction, and a body part of the permanent formwork / reinforcement member Screw the crimp nut placed in the permanent mold / reinforcement member into the tip of the gap-holding male screw member that has a male screw formed entirely from the formed hole, and insert it until the tip contacts the surface of the concrete column or concrete beam. A step of rotating the interval holding male screw member to raise the crimping nut to a position in contact with the inner surface of the main body of the permanent mold / reinforcement member, and a surface of the permanent mold / reinforcement member of the male screw member for holding and fixing the interval Cutting and removing the portion protruding from the surface so that the cut surface is flush with the surface of the permanent mold and reinforcing member, and a process of arranging a continuous fiber sheet on the outer periphery of the permanent mold and reinforcing member with an adhesive And a step of filling the space between the concrete column or concrete beam and the permanent formwork / reinforcing member with a solidifying material and solidifying the solidifying material, thereby solidifying the solidified concrete column or concrete beam and the permanent formwork. It is possible to prevent a gap from being formed between the reinforcing member and the reinforcing member, and the fixed male fixing member and the concrete column are fixed to the space holding male screw member and the solidifying member firmly formed on the solid support after the solidifying member is solidified. Or it becomes possible to exhibit an anchor function with a concrete beam.

(A) (b) (c) It is a figure which shows embodiment of this invention. It is a figure which shows embodiment of this invention. It is a figure which shows embodiment of this invention. It is a figure which shows embodiment of this invention. It is a figure which shows embodiment of this invention.

  Embodiments of the concrete structure seismic reinforcement structure of the present invention will be described with reference to the drawings. FIGS. 1A, 1B, and 1C are a top view, a front view, and a side view of a permanent formwork / reinforcing member 3 used in the seismic reinforcement structure of the concrete column 1 or the concrete beam 2. FIG.

  The permanent formwork / reinforcing member 3 is disposed in a pair so as to face the periphery of the concrete pillar 1 or the concrete beam. The permanent formwork / reinforcing member 3 forms an upper flange portion 5 and a lower flange portion 6 that horizontally extend inwardly above and below the U-shaped main body portion 4. The upper flange portion 5 and the lower flange portion 6 are formed with holes 5a and 6a that communicate with each other when the upper flange portion 5 and the lower flange portion 6 are provided. These holes 5a and 6a function as air vents when the solidifying material is filled. Holes 7 are formed in the front and side surfaces of the main body.

  The continuous positioning claw 8 extending perpendicularly to the tip of the upper flange portion 5 or the lower flange portion 6 is fixed. In the embodiment shown in the figure, the connecting positioning claw 8 is fixed to the upper flange portion 5, but may be fixed to the lower flange portion 6. A positioning claw 9 for facing that extends forward may be fixed to one of both side surfaces of the main body 4.

  2 and 3 are views showing an embodiment in which a permanent formwork / reinforcing member 3 is arranged around a concrete pillar 1. A pair of permanent formwork / reinforcing members 3 and 3 are arranged facing each other around the concrete pillar 1.

Next, the second-stage permanent mold and reinforcement members 3 and 3 are arranged facing each other in the vertical direction. When the permanent formwork / reinforcing member 3 is continuously provided in the vertical direction, it is accurately provided by the connecting positioning claw 8.
4 is in contact with the inner surface.

  The second-stage permanent mold and reinforcement members 3 and 3 are arranged 90 degrees out of phase with the first-stage permanent mold and reinforcement members 3 and 3 arrangement. The reason why the 90-degree phase is arranged is to prevent the longitudinal joining surfaces of the permanent formwork / reinforcing members 3 and 3 arranged facing each other from being linear. This is because if the longitudinal joint surfaces are aligned in a straight line, it becomes brittle against stress during an earthquake.

  A crimping nut 12 in which a spacing male screw member 10 having a male screw formed over its entire length through a hole 7 formed in the main body part 4 of the permanent mold and reinforcement member 3 is disposed in the main body part 4 of the permanent mold and reinforcement member 3 at its tip. Is inserted until the tip end portion to which the crimping nut 12 is screwed contacts the surface of the concrete column 1. The rear part of the interval holding male screw member 10 has a length protruding from the outer periphery of the permanent formwork / reinforcing member in order to rotate the interval holding male screw member 10 with a rotary tool.

  The spacing male screw member 10 is rotated with a rotary tool, and the crimping nut 12 screwed to the spacing male screw member 10 is raised to a position where it comes into contact with the inner surface of the main body 4 of the permanent mold and reinforcement member 3. By positioning the crimping nut 12 so as to be in contact with the inner surface of the main body 4 of the permanent mold / reinforcement member 3, the concrete pillar 1 and the permanent mold / reinforcement are not deformed without deforming the thin permanent mold / reinforcement member 3. It is possible to keep the distance from the member 3 substantially constant.

  As shown in FIG. 5, after the crimping nut 12 screwed to the spacing male screw member 10 is positioned on the inner surface of the main body 4 of the permanent mold / reinforcement member 3, the permanent mold / strengthening of the spacing male screw member 10 is performed. The portion protruding from the surface of the member 3 is cut so that the cut surface is flush with the surface of the permanent mold and reinforcing member 3. The continuous fiber sheet 14 is disposed on the surface of the permanent mold and reinforcing member 3 having a smooth surface using an adhesive. By disposing the continuous fiber sheet 14, it is possible to improve the energy attenuation and the tensile strength at the time of an earthquake.

  When the arrangement of the continuous fiber sheet 14 is completed on the outer periphery of the permanent mold / reinforcement member 3, the gap between the concrete column 1 and the permanent mold / reinforcement member 3 is filled with a solidifying material 13 such as concrete mortar and solidified.

  The interval holding male screw member 10 has a function of making the interval between the concrete column 1 and the permanent formwork / reinforcing member 3 substantially constant even if there is unevenness in the concrete column 1. It is possible to prevent a gap from being generated between the frame / reinforcing member 3 and the solidifying material 13.

  Since the male screw member 10 is formed with a male screw over its entire length, it has a good fixing property with the solidified material, and can exhibit an anchor function for integrating the permanent formwork / reinforcing member 3 and the concrete column 1. .

  FIG. 4 is a view showing an embodiment in which a permanent formwork / reinforcing member 3 is arranged around the concrete pillar 2. A pair of permanent mold and reinforcement members 3 and 3 are arranged facing each other around the concrete pillar 1, and a pair of permanent mold and reinforcement members 3 and 3 are arranged side by side in the lateral direction. Other configurations are the same as those of the embodiment of the concrete pillar 1 shown in FIGS.

  As described above, according to the concrete structure seismic reinforcement structure and the concrete structure seismic reinforcement structure construction method of the present invention, it is easy to assemble and connect, and the concrete column or the concrete beam surface is not landed despite the presence of unevenness. The distance between the column or concrete and the beam and the permanent formwork / reinforcement member can be kept almost constant, and after the solidifying material is solidified, a gap is generated between the concrete column or concrete beam and the permanent formwork / reinforcement member. It is possible to prevent the gap between the fixed male member and the solid member fixed on the solid support, and to provide an anchor function between the permanent formwork / reinforcing member and the concrete column or concrete beam. It becomes possible.

  1: Concrete column, 2: Concrete beam, 3: Permanent formwork and reinforcing member, 4: Body part, 5: Upper flange part, 5a: Hole, 6: Lower flange part, 6a: Hole, 7: Hole, 8: Positioning claw for continuous installation, 9: Positioning claw for facing, 10: Spacing male screw member, 12: Crimp nut, 13: Solidified material, 14: Continuous fiber sheet

Claims (4)

A horizontal cut surface is formed on the upper and lower sides of the U-shaped main body part, and the upper and lower flange parts extend horizontally inward, and holes are formed on the front and side surfaces of the main body part to face each other around the concrete column or concrete beam in the vertical direction or A permanent formwork and reinforcing member arranged continuously in the lateral direction;
Permanent formwork / reinforcing member and concrete column inserted through holes formed in the body part of the permanent formwork / reinforcement member, the tip is in contact with the surface of the concrete pillar or concrete beam, and the rear part protrudes from the body part, and the external thread is formed Or a spacing male screw member that keeps the spacing between the concrete beams constant,
A crimp nut positioned within the permanent mold and reinforcement member, screwed to the spacing male screw member and in contact with the inner surface of the main body of the permanent mold and reinforcement member;
A solidified material filled in a gap between the permanent formwork and reinforcing member and the concrete column or concrete beam;
A seismic reinforcement structure for a concrete structure characterized by comprising:   The seismic reinforcement structure for a concrete structure according to claim 1, further comprising a positioning claw for continuous installation fixed to any one of the upper and lower flange portions.   The concrete structure seismic reinforcement structure according to claim 1 or 2, further comprising a continuous fiber sheet disposed on an outer periphery of the permanent formwork / reinforcement member via an adhesive. A step of arranging the permanent formwork / reinforcing member according to claim 1 or 2 around the concrete pillar or the concrete beam in a vertical or horizontal direction,
A crimp nut placed in the permanent mold and reinforcement member is screwed onto the end of the gap retaining male screw member that has a male screw formed entirely from the hole formed in the main body of the permanent mold and reinforcement member. Or inserting until it touches the surface of the concrete beam;
Rotating the spacing male screw member and raising the crimping nut to a position where it comes into contact with the inner surface of the main body of the permanent mold and reinforcing member;
A step of cutting and removing a portion protruding from the surface of the permanent mold and reinforcing member of the male screw member for spacing and supporting fixing so that the cut surface is flush with the surface of the permanent mold and reinforcing member; and
Arranging a continuous fiber sheet on the outer periphery of the permanent mold and reinforcing member via an adhesive;
Filling the space between the concrete pillar or concrete beam and the permanent formwork / reinforcing member with a solidifying material, and solidifying the solidifying material;
A concrete structure earthquake-proof structure construction method characterized by comprising:

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