JP6388738B1 - Seismic reinforcement structure for concrete structures - Google Patents

Abstract

An object of the present invention is to provide a seismic reinforcing structure for a concrete structure that has a simple structure, the strength of the reinforcing member itself is high, the assembly and arrangement are easy, and the seismic performance can be increased.
A post-construction anchor 3 is fixed to a concrete column 1 and a concrete and a beam 2 and has a portion protruding forward, and a web is provided on the surface of the concrete column 1 and the concrete beam 2 on which the post-construction anchor 3 is installed. 1 and the H-shaped steel reinforcing member 4 composed of a flange and a web arranged so as to be parallel to the surface of the concrete beam 2, a bending reinforcing bar 5 arranged in a space surrounded by the web and the flange, and the concrete column 1 And the formwork member 6 disposed between the flanges on the opposite side of the concrete beam 2, the continuous fiber sheet 7 disposed on the surface of the formwork member 6 and the flange, the concrete pillar 1 and the concrete beam 2, and the flange and the web. And a solidified material 9 filled in the space surrounded by the flange and the web and the mold member 6.
[Selection] Figure 1

Description

  The present invention relates to a seismic reinforcement structure for a concrete structure composed of concrete columns and concrete beams of reinforced concrete (RC) or steel reinforced concrete (SRC).

  Conventionally, as a seismic reinforcement structure for concrete structures consisting of reinforced concrete (RC) or steel-framed reinforced concrete (SRC) concrete columns and concrete beams, reinforcing frames are placed on the surfaces of the concrete columns and concrete beams. An external seismic reinforcement method has been proposed in which the space between the concrete beam and the reinforcing frame is filled with a solidifying material such as concrete mortar and solidified to integrate the reinforcing frame, the concrete column, and the concrete beam.

  The external seismic retrofitting method can be constructed in the state where the building is used, is aesthetically pleasing, is highly economical, and demand is increasing.

Japanese Patent Laying-Open No. 2015-86690 Japanese Patent Laid-Open No. 2006-204844

  However, the conventional external seismic reinforcement method for concrete structures has a problem that the strength of the reinforcing frame itself is not sufficient, and measures such as increasing the number of reinforcing bars to be arranged are necessary to obtain the required seismic performance. Had.

  The present invention solves the problems of the prior art, and provides a seismic reinforcing structure for a concrete structure that has a simple structure, the strength of the reinforcing member itself is high, the assembly and arrangement are easy, and the seismic performance can be increased. The purpose is to do.

In order to solve the above problems, the seismic reinforcement structure for a concrete structure according to the present invention is a seismic reinforcement structure for a concrete structure composed of a concrete column and a concrete beam. The post-installed anchor and the surface of the concrete column and concrete beam where the post-installed anchor is installed are parallel to the surface of the concrete column and concrete beam, and both flange ends are in contact with the surface of the concrete column and concrete beam. An H-shaped steel reinforcing member composed of a flange and a web disposed in the web, a bending reinforcing bar disposed in a space surrounded by the web and the flange, and a flange disposed on the inner side of the flange opposite to the concrete column and the concrete beam. With two members that have parts that touch the inner surface of Made is, two folded ends of the member so as to overlap provided extending stepped parallel in opposite directions, the surface and the flange end surface of the end portion of the two members provided with a step extending parallel in opposite directions There was to become flush, and the mold member provided by stepped gaps to allow displacement of the end portion in the horizontal direction between the ends of the two members extending parallel to the opposite direction by providing a level difference, the mold A continuous fiber sheet disposed on the surface of the frame member and the flange, a space surrounded by the concrete pillar and the concrete beam, the flange and the web, and a solidified material filled in a space surrounded by the flange, the web and the formwork member, It is characterized by providing.

  Moreover, the seismic reinforcement structure for a concrete structure of the present invention is characterized in that a reinforcing plate is laminated on a continuous fiber sheet.

  The seismic reinforcement structure for a concrete structure according to the present invention has an L-shaped connecting member fixed to the surface of a concrete column and a concrete beam with an anchor bolt, and a flange of an H-shaped steel reinforcing member is fixed to the L-shaped connecting member with a connecting bolt. It is characterized by doing.

  Moreover, the seismic reinforcement structure for a concrete structure according to the present invention is characterized in that a steel column damping brace is arranged on a concrete column and a concrete beam that are seismically reinforced.

Also, seismic reinforcement structure of the concrete structure of the present invention, an obstacle to a plurality of surfaces of the concrete columns and concrete beams are exposed without concrete pole and the surface of the concrete beam, wherein the plurality of exposed surfaces The earthquake-proof reinforcement structure structure of any one of claim | item 1-4 is provided.

In the seismic reinforcement structure of concrete structures consisting of concrete columns and concrete beams, the surface of the concrete pillars and concrete beams where the post-construction anchors are fixed to the concrete pillars and the concrete beams and have portions protruding forward, and the concrete pillars and concrete beams on which the post-construction anchors are installed H-shaped steel reinforcing member consisting of a flange and a web arranged so that the web is parallel to the surface of the concrete column and the concrete beam, and both flange ends are in contact with the surface of the concrete column and the concrete beam, and the web and the flange It is formed of two members that have bending reinforcement reinforcing bars arranged in the enclosed space, and two members that are arranged inside the flange on the opposite side of the concrete column and the concrete beam and that respectively contact the inner surface of the flange. overlap provided extending stepped parallel in opposite directions to end Uni folding surface and the flange end surface of the end portion of the reverse two members provided with elongation step in parallel to the set to be flush with each other, the end of the two members extending parallel to the opposite direction by providing a level difference a mold member provided with stepped gaps to allow displacement of the end portion in the horizontal direction between the parts, a continuous fiber sheet disposed frame members and the flange surface, concrete columns and concrete beams and the flange and web And the solidified material filled in the space surrounded by the flange and the web and the formwork member, the H-shaped steel reinforcing member has independent bending resistance by the flange and shear resistance by the web. a structural member that is configured by, composite structure obtained by adding a reinforcing rebar bending solidifying material on this characteristic, both it is possible to dramatically increase the earthquake resistance together, with one another It is possible to step without placing continuous fiber sheet surface of the end portion of the two members having a parallel elongation step disposed on the surface because the surface one direction, of the frame members by the stress loaded on the earthquake Slip deformation occurs between the two members, and the seismic energy can be absorbed by frictional damping at that time.
It is possible to further improve the seismic performance by arranging the reinforcing plate on the continuous fiber sheet.
By fixing the L-shaped connecting member to the surface of the concrete column and the concrete beam with anchor bolts, and fixing the flange of the H-shaped steel reinforcing member to the L-shaped connecting member with the connecting bolt, the H-shaped steel reinforcing member is securely attached to the concrete column. And can be fixed to concrete beams.
It is possible to further improve the seismic performance by arranging steel-made damping braces on concrete columns and concrete beams that have been seismically reinforced.
5. The seismic reinforcement according to claim 1, wherein there are no obstacles on the plurality of surfaces of the concrete column and the concrete beam, and the surfaces of the concrete column and the concrete beam are exposed , and the exposed plurality of surfaces are exposed. By providing a structural structure , both strength and toughness can be dramatically increased.

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. 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 present invention will be described with reference to the drawings. 1, FIG. 2 and FIG. 3 are diagrams showing an embodiment of the seismic reinforcement structure for a concrete structure comprising a concrete column and a concrete beam according to the present invention.

  In order to perform external seismic reinforcement on the concrete column 1 and the concrete beam 2, the construction anchor 3 is installed on the concrete column 1 and the concrete beam 2 after the tips protrude from the surfaces of the concrete column 1 and the concrete beam 2.

  The H-shaped steel reinforcing member 4 including the web 4a and the flange 4b is disposed on the concrete column 1 and the concrete beam 2 on which the post-installed anchor 3 is installed so that the web 4a is parallel to the surfaces of the concrete column 1 and the concrete beam 2. . Bending reinforcement 5 is disposed in the space between the flange 4b and the web 4a where the projecting portion of the post-construction anchor 3 is located. A bending reinforcing bar 5 is arranged in the space between the flange 4b and the web 4a opposite to the concrete column 1 and the concrete beam 2.

  A formwork member 6 serving as a permanent formwork for sealing a space surrounded by the flanges 4b and 4b and the web 4a of the H-shaped steel reinforcing member 4 is installed. As shown in FIG. 5, the mold member 6 is composed of two members 6a and 6b whose ends are bent. The ends of the two bent members 6a and 6b are arranged so as to overlap horizontally, and a gap R that can be displaced in the horizontal direction is provided between the ends overlapped horizontally. In the displaceable gap R, slip deformation occurs between the two members 6a and 6b due to the stress applied during the earthquake, and it becomes possible to absorb the seismic energy by friction damping at that time.

  The continuous fiber sheet 7 is pasted on the mold member 6 and the flange 4b of the H-shaped steel reinforcing member 4 with an adhesive. The material of the continuous fiber sheet 7 is inorganic fiber such as carbon fiber, or organic fiber such as aramid fiber, polyethylene fiber, or polyarate fiber. The tensile strength of the fiber sheet of 1 direction and 2 directions formed with these fibers is as large as 5 to 180 ton / m. By sticking the continuous fiber sheet 7 on the formwork member 6 and the flange 4b of the H-shaped steel reinforcing member 4, an improvement in durability due to rust prevention is expected.

  The reinforcing plate 8 is laminated on the continuous fiber sheet 7 to further improve the earthquake resistance.

In the space surrounded by the concrete pillar 1 and the concrete beam 2 and the flange 4b and the web 4a of the H-shaped steel reinforcing member 4, and in the space surrounded by the flange 4b and the web 4a of the formwork member 6 and the H-shaped steel reinforcing member 4. A solidifying material 9 such as high-strength and high-fluidity concrete mortar is filled and solidified to integrate the concrete column 1 and the concrete beam 2 with the H-shaped steel reinforcing member 4. The post-construction anchor 3 is integrated with the H-shaped steel reinforcing member 4, the concrete column 1, and the concrete beam 2 by solidifying the solidified material filled in the space between the H-shaped steel reinforcing member 4, the concrete column 1, and the concrete beam 2. To improve earthquake resistance.

  The H-shaped steel reinforcing member 4 is a structural member in which the bending resistance by the flange 4b and the shearing resistance by the web 4a are independently configured. Together, it is possible to dramatically increase the seismic performance.

  As shown in FIG. 2, a steel frame damping brace 11 is incorporated through a gusset plate 10 into a frame in which an H-shaped steel reinforcing member 4 is arranged on a concrete column 1 and a concrete beam 2, thereby further strengthening the earthquake resistance. Performance can be obtained. In FIG. 2, 12 is a floor slab.

  FIG. 4 is a diagram showing another embodiment of the seismic reinforcement structure for a concrete structure including the concrete pillar 1 and the concrete beam 2.

  In order to perform external seismic reinforcement on the concrete column 1 and the concrete beam 2, the construction anchor 3 is installed on the concrete column 1 and the concrete beam 2 after the tips protrude from the surfaces of the concrete column 1 and the concrete beam 2.

  An L-shaped connecting member 13 is fixed to the concrete pillar 1 and the concrete beam 2 with anchor bolts 14. An H-shaped steel reinforcing member 4 comprising a web 4a and a flange 4b is arranged on the concrete column 1 and the concrete beam 2 so that the web 4a is parallel to the surfaces of the concrete column 1 and the concrete beam 2, and the flange 4b and the L-shaped cross section. The connecting member 13 is fixed with the connecting bolt 15.

  Bending reinforcement 5 is disposed in the space between the flange 4b and the web 4a where the projecting portion of the post-construction anchor 3 is located. A bending reinforcing bar 5 is arranged in the space between the flange 4b and the web 4a opposite to the concrete column 1 and the concrete beam 2.

  A formwork member 6 serving as a permanent formwork for sealing a space surrounded by the flanges 4b and 4b and the web 4a of the H-shaped steel reinforcing member 4 is installed. The continuous fiber sheet 7 is pasted on the mold member 6 and the flange 4b of the H-shaped steel reinforcing member 4 with an adhesive. The reinforcing plate 8 is laminated on the continuous fiber sheet 7 to further improve the earthquake resistance.

  In the space surrounded by the concrete pillar 1 and the concrete beam 2 and the flange 4b and the web 4a of the H-shaped steel reinforcing member 4, and in the space surrounded by the flange 4b and the web 4a of the formwork member 6 and the H-shaped steel reinforcing member 4. A solidifying material 9 such as high-strength and high-fluidity concrete mortar is filled and solidified to integrate the concrete column 1 and the concrete beam 2 with the H-shaped steel reinforcing member 4.

  In this embodiment, since the concrete pillar 1 and the concrete beam 2 and the H-shaped steel reinforcing member 4 are fixed via the L-shaped connecting member 13, the seismic performance is further improved.

  6, 7, and 8, when the plurality of outer surfaces of the concrete column 1 and the concrete beam 2 are exposed without an obstacle, the external type seismic reinforcement shown in FIGS. Perform on the outer surface. In particular, it is effective to apply to a plurality of outer surfaces of the concrete column 1.

  6 is a diagram showing an embodiment in which the two types of concrete pillar 1 and concrete beam 2 are subjected to the external type seismic reinforcement shown in FIGS. 3 and 4, and FIG. 7 shows the concrete pillar 1 and the concrete beam. FIG. 8 is a diagram showing an embodiment in which the external type seismic reinforcement shown in FIG. 3 and FIG. 4 is applied to the three surfaces of FIG. 2, and FIG. 3. It is a figure which shows embodiment which gave the external type earthquake-proof reinforcement shown by FIG. By applying seismic reinforcement to the outer surfaces of the plurality of concrete columns 1 and concrete beams 2, both strength and toughness are increased.

  As described above, according to the seismic reinforcement structure of a concrete structure of the present invention, the H-shaped steel reinforcement member is a structural member configured independently of the bending resistance by the flange and the shear resistance by the web, and this characteristic The composite structure to which the solidifying material and the bending reinforcing steel bar are added makes it possible to increase the seismic performance dramatically.

  1: concrete column, 2: concrete beam, 3: post-installed anchor, 4: H-shaped steel reinforcing member, 4a: web, 4b: flange, 5: bending reinforcement, 6: formwork member, 6a: bent Member, 6b: bent member, 7: continuous fiber sheet, 8: reinforcing plate, 9: solidified material, 10: gusset plate, 11: vibration damping brace, 12: floor slab, 13: L-shaped connecting member, 14: Anchor bolt, 15: Connecting bolt

Claims (5)

In the seismic reinforcement structure of concrete structures consisting of concrete columns and concrete beams,
A post-construction anchor having a portion that is fixed to a concrete column and a concrete beam and protrudes forward;
The flange is arranged so that the web is parallel to the surface of the concrete column and the concrete beam and the ends of both flanges are in contact with the surface of the concrete column and the concrete beam. An H-shaped steel reinforcing member made of a web;
Bending reinforcement bars placed in the space surrounded by the web and flange,
Located inside the flange on the opposite side of the concrete column and concrete beam, it is made up of two members each having a part that touches the inner surface of the flange. The two end surfaces of the two members, which are bent so as to overlap each other and extend in parallel in opposite directions, are flush with each other, and the end surfaces of the flanges are flush with each other. A formwork member provided with a gap between the end portions of the member so that the end portion can be displaced in the horizontal direction by the step ;
A continuous fiber sheet disposed on the mold member and the flange surface;
A space surrounded by a concrete column and a concrete beam and a flange and a web; and a solidified material filled in a space surrounded by the flange, the web and a formwork member;
An anti-seismic reinforcement structure for a concrete structure, comprising: 2. The seismic reinforcement structure for a concrete structure according to claim 1 , wherein a reinforcing plate is laminated on the continuous fiber sheet. The L-shaped coupling member is fixed with anchor bolts on the surface of the concrete column and the concrete beam, L-shaped connecting member according to claim 1 or 2, characterized in that to fix the flange of the H-shaped steel reinforcing member connecting bolts Seismic reinforcement structure for concrete structures.   The seismic reinforcement structure for a concrete structure according to any one of claims 1 to 3, wherein a steel-made vibration-damping brace is arranged on the concrete column and the concrete beam that are seismically reinforced. 5. The seismic reinforcement according to claim 1, wherein there are no obstacles on the plurality of surfaces of the concrete column and the concrete beam, and the surfaces of the concrete column and the concrete beam are exposed, and the exposed plurality of surfaces are exposed. A concrete structure with a structural structure.

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