JP2012052311A - Earthquake strengthening structure for concrete structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an earthquake strengthening structure capable of achieving excellent reinforcement and earthquake resistant effects by reinforcing a column section of a concrete structure while suppressing an increase in a thickness of a reinforcement member installed in an open area.SOLUTION: Reinforcement plates 7 are placed on both sides of a column section 3 in a thickness direction with a distance almost the same as the width of the column section 3. A solidification material is filled and hardened in a space between the opposing reinforcement plates 7. The column section 3 and the hardened solidification material are kept in a compressed state in the thickness direction by fastening binding members 9 penetrating the opposing reinforcement plates 7 and the hardening material. A composite reinforcement body 11 is constructed by placing pressure-bonding plates 13a on both surfaces of a reinforced concrete wall 12a in the thickness direction, and compressing the pressure-bonding plates 13a and the reinforced concrete wall 12a by fastening the bonding members 9 penetrating the pressure-bonding plates 13a and the reinforced concrete wall 12a in the thickness direction so as to keep the same in the compressed state. An upper portion of the composite reinforcement body 11 is fixed to a beam section 2 and a lower portion of the composite reinforcement body 11 is fixed to a floor section 4. The composite reinforcement body 11 has a thickness less than that of the column section 3 and a ratio of a width to a height of 10 to 40%.

Description

  The present invention relates to a seismic reinforcement structure for a concrete structure, and more particularly, the thickness of a reinforcing material installed in an open area surrounded by a pillar part, a beam part and a floor part while reinforcing the pillar part of the concrete structure. The present invention relates to a seismic reinforcement structure for a concrete structure capable of obtaining an excellent reinforcement effect and a seismic effect while suppressing the above.

  Various seismic reinforcement structures for concrete structures have been proposed. For example, a reinforcing plate is placed on both sides of the thickness of a column part, and a solidified material filled and solidified between the placed reinforcing plates, and a placed reinforcing plate. There is a structure that reinforces the column portion by tightening a fastening member penetrating through the column. Alternatively, the reinforcing plate is placed between the reinforcing plates so as to sandwich the concrete wall as a reinforcing material, and the reinforcing plate, the solidifying material, and the fastening member penetrating the concrete wall are tightened, and the column portion and the concrete wall are connected. There is also a reinforcing structure to be integrated (see, for example, Patent Document 1).

  As described above, in the reinforcing structure in which the pillar portion and the concrete wall are integrated, the thickness of the concrete wall is adjusted to the thickness of the pillar portion so that the thickness of the both is almost the same. Therefore, there has been a problem that the concrete wall becomes unnecessarily thick and excessively heavy. Therefore, the inventor of the present application arranges reinforcing plates on both sides in the thickness direction of a laminate in which a concrete wall and a lightweight wall member having an appropriate thickness are laminated, and a binding member that penetrates the opposed reinforcing plate and the laminate. The reinforcement structure which uses the synthetic wall which tightened up as a reinforcing material is proposed (refer patent document 2).

  In this proposed reinforcement structure, the concrete wall has an appropriate thickness, but the composite wall thickness is almost the same as the thickness of the column part, so there is room for improvement from the viewpoint of space saving. It was. After that, various experiments and researches led to a reinforcement structure with excellent reinforcement and earthquake resistance while suppressing the thickness of the reinforcement.

JP 2006-274783 A JP 2009-174148 A

  The object of the present invention is to reinforce the pillar portion of the concrete structure, while suppressing the thickness of the reinforcing material installed in the opening region surrounded by the pillar portion, the beam portion and the floor portion, An object of the present invention is to provide a seismic reinforcement structure for a concrete structure capable of obtaining an earthquake resistance effect.

  In order to achieve the above object, the seismic reinforcement structure for a concrete structure according to the present invention has an upper end fixed to a beam portion and a lower end portion in an opening area surrounded by a pillar portion, a beam portion and a floor portion of the concrete structure. In the seismic reinforcement structure of a concrete structure in which a reinforcing member fixed to the floor portion is installed, each column portion on both sides of the opening region is wound around three directions of the column portion and in the direction of the other column portion. Protruding, sandwiched between reinforcing plates facing each other at approximately the same distance as the thickness of the pillar part, and tightening the solidified material filled and solidified between the facing reinforcing plates and the fastening member that penetrates the facing reinforcing plate Thus, the reinforcing plate placed opposite to each other compresses both the pillar portion and the solidified material in the thickness direction so that prestress is applied, and the reinforcing material has a thickness of the reinforced concrete wall. Synthetic reinforcement body in which both sides in the direction are sandwiched between crimping plates, the fastening members that pass through these crimping plates and the reinforced concrete wall are tightened, and both sides in the thickness direction of the reinforced concrete wall are compressed by the crimping plate and prestressed Or a synthetic reinforcing body in which concrete is filled in a steel pipe, the thickness of the synthetic reinforcing body is thinner than the thickness of the column portion, and the ratio of the width to the height of the synthetic reinforcing body is 10% to It is characterized by 40%.

  Further, the seismic reinforcement structure of another concrete structure of the present invention has an upper end fixed to the beam portion and a lower end portion of the floor portion in an opening area surrounded by the pillar portion, beam portion and floor portion of the concrete structure. In the seismic reinforcement structure of a concrete structure in which a reinforcing member fixed to a wall is installed, each column part on both sides of the opening region protrudes on both sides in the width direction of the column part, and is approximately the same as the thickness of the column part. At the both sides in the width direction of the column part, tighten the solidified material filled and solidified between the opposed reinforcing plates and the fastening member that penetrates the opposed reinforcing plate, The both sides of the column part and the solidified material in the thickness direction are compressed by the opposed reinforcing plates so that prestress is applied, and the reinforcing material is a pressure-bonding plate on both sides of the reinforced concrete wall in the thickness direction. A synthetic reinforcement body that is sandwiched between the crimping plate and the reinforced concrete wall and tightened to compress the both sides in the thickness direction of the reinforced concrete wall and prestressed, or the inside of the steel pipe It is a synthetic reinforcement body filled with concrete, the thickness of the synthetic reinforcement body is thinner than the thickness of the column portion, and the ratio of the width to the height of the synthetic reinforcement body is 10% to 40%. Features.

  According to the present invention, the pillar portion of the opening region is sandwiched between the reinforcing plates facing each other at substantially the same interval as the thickness of the pillar portion, and the solidified material filled and solidified between the facing reinforcing plates and the facing reinforcement. Tightening member that penetrates the plate is tightened, and the opposing reinforcement plate compresses both the column part and the thickness direction of the solidified material in a prestressed state, so the active lateral restraint effect Can be obtained, and the column portion can be sufficiently reinforced.

  And as a reinforcing material to be installed in the opening area, both sides of the reinforced concrete wall in the thickness direction are sandwiched between the crimping plates, the fastening members that penetrate these crimping plates and the reinforced concrete wall are tightened, and the thickness of the reinforced concrete wall is secured by the crimping plate. Use a composite reinforcement body that has been prestressed by compressing both sides of the direction, or a composite reinforcement body that is filled with concrete inside the steel pipe, and the thickness of this composite reinforcement body is thinner than the thickness of the column part. In this way, weight reduction and space saving are attempted. Furthermore, by making the ratio of the width to the height of the synthetic reinforcing body 10% to 40%, the synthetic reinforcing body can function as a bending yield type damping material capable of absorbing a large plastic energy. it can. Therefore, in this invention, the outstanding reinforcement effect and the earthquake resistance effect can be acquired, suppressing the thickness of a reinforcing material.

It is a front view which illustrates an embodiment of the earthquake-proof reinforcement structure of the present invention. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is CC sectional drawing of FIG. It is sectional drawing which shows the modification of the attachment structure of the lower end part and floor part of the synthetic reinforcement body of FIG. It is sectional drawing which shows another modification of the attachment structure of the lower end part and floor part of the synthetic reinforcement body of FIG. It is a cross-sectional view which shows the modification of a synthetic reinforcement body. It is a cross-sectional view which shows the modification of the reinforcement structure of a pillar part. It is a cross-sectional view which shows another modification of the reinforcement structure of a column part. It is a front view which shows the example of arrangement | positioning of a synthetic reinforcement body. It is a front view which shows another example of arrangement | positioning of a synthetic reinforcement body. It is a front view which shows another example of arrangement | positioning of a synthetic reinforcement body. It is a front view which shows another example of arrangement | positioning of a synthetic reinforcement body. It is DD sectional drawing of FIG. It is a front view which illustrates the concrete structure before carrying out earthquake-proof reinforcement.

  Hereinafter, the seismic reinforcement structure of a concrete structure of the present invention will be described based on the embodiments shown in the drawings.

  As illustrated in FIG. 15, the concrete structure 1 to be subjected to the seismic reinforcement of the present invention has a beam portion 2 installed between the column portion 3 and the column portion 3 erected on the floor portion 4. It is a concrete structure 1 having a frame that opens an area surrounded by these.

  As shown in FIGS. 1 to 4, the seismic reinforcement structure for a concrete structure of the present invention has an opening region surrounded by the column part 3, the beam part 2 and the floor part 4, and an upper end part at the beam part 2. It has a structure in which a vertically long synthetic reinforcing body 11 having a lower end fixed to the floor portion 4 is installed. The synthetic reinforcing body 11 functions as a reinforcing material, and the number thereof is not particularly limited.

  In this embodiment, two synthetic reinforcing bodies 11 juxtaposed with a gap S1 in the width direction form one unit. Two units are arranged in the opening region with a gap in the width direction. The interval between the units is a passage.

  As illustrated in FIG. 2, the column portion 3 is formed of a reinforcing bar 5 and concrete 6. The reinforcing bar 5 is composed of a main reinforcing bar that is linearly extended in the vertical direction and a band reinforcing bar that is arranged so as to surround a plurality of main reinforcing bars. As illustrated in FIG. 3, the beam portion 2 is similarly formed of reinforced concrete.

  The column portion 3 is provided with a metal reinforcing plate channel 7 made of a steel plate or the like formed in a U-shaped cross section having a thickness of about 3 mm to 9 mm along its outer peripheral surface. As a result, the reinforcing plate channel 7 is wound around the three directions of the column portion 3 and the reinforcing plate protrudes in the direction of the other column portion 3 (right direction in FIG. 2). It is a structure that faces each other at the same interval. The column portions 3 on both sides are sandwiched in the thickness direction by the reinforcing plates disposed opposite to the reinforcing plate channel 7.

  The surface in three directions of the column part 3 and the reinforcing plate are separated by about 10 mm, and the column part 3 3 is formed by a grout (high strength cement paste material) or a solidifying material 16 such as mortar filled in the gap. The surface of the direction and the reinforcing plate are fixed integrally. In the present invention, the solidifying material 16 means concrete, mortar, grout (cement paste) and the like.

  A PC steel rod 9 passes through the solidified solidified material 16 and the opposed reinforcing plate, and the PC steel rod 9 is reinforced with the reinforcing plate channel 7 facing each other with fixing nuts 10 screwed to both ends thereof with a washer interposed. It is fixed to the plate.

  The PC steel rod 9 is tightened by retightening the fixing nut 10. By this tightened PC steel bar 9, both the thickness direction both sides of the column portion 3 and the solidified material 16 are compressed through the reinforcing plates disposed opposite to the reinforcing plate channel 7, and a prestress is applied. ing. In this way, the PC steel bar 9 functions as a fastening member that presses the reinforcing plate 8 facing the reinforcing plate channel 7 and the member between them. The binding member is not limited to the PC steel rod 9, and other metal rods can be used.

  The composite reinforcing body 11 is composed of a reinforced concrete wall 12a in which a reinforcing bar 5 is embedded, a crimping plate 13a, and a PC steel rod 9. The both sides in the thickness direction of the reinforced concrete wall 12a are sandwiched between the crimping plates 13a, the PC steel rod 9 passes through the crimping plate 13a and the reinforced concrete wall 12a, and the PC steel rod 9 is washed by the fixing nut 10 screwed to both ends thereof. It is being fixed to the crimping | compression-bonding plate 13a which faced through. The pressure-bonding plate 13a is a metal plate made of a steel plate or the like and has a thickness of about 3 mm to 9 mm. The PC steel rod 9 tightened by tightening the fixing nut 10 compresses both sides in the thickness direction of the reinforced concrete wall 12a through the pressure-bonding plate 13a so that prestress is applied.

  The thickness t of the synthetic reinforcing body 11 is thinner than the thickness T of the column portion 3. For example, the thickness t is about 20% to 80% of the thickness T. Further, the ratio of the width W to the height H of the synthetic reinforcing body 11 is 10% to 40%.

  As illustrated in FIG. 3, a reinforcing plate 8 made of a metal plate such as a steel plate having a thickness of about 3 mm to 9 mm is opposed to the beam portion 2 on both sides in the thickness direction. The upper end portion of the composite reinforcing body 11 located near the lower portion of the beam portion 2 and the beam portion 2 are sandwiched between the opposed reinforcing plates 8, and the solidifying material 16 is filled between the opposed reinforcing plates 8. It is in a solidified state.

  A PC steel rod 9 passes through the solidified material 16, the opposed reinforcing plate 8 and the beam portion 2, and this PC steel rod 9 is fixed to the reinforcing plate 8 with a washer interposed by fixing nuts 10 screwed to both ends thereof. ing. Further, the PC steel rod 9 penetrates through the upper ends of the solidifying material 16, the opposed reinforcing plate 8 and the synthetic reinforcing body 11, and this PC steel rod 9 has a washer interposed by fixing nuts 10 screwed to both ends thereof. The reinforcing plate 8 is fixed.

  By tightening the fixing nut 10, the PC steel bar 9 tightened up compresses the beam portion 2, the upper end portion of the composite reinforcing body 11, and both sides in the thickness direction of the solidified material 16 via the opposing reinforcing plates 8. In this state, prestress is applied, and the upper end portion of the composite reinforcing body 11 is fixed to the beam portion 2.

  As illustrated in FIG. 4, the lower end portion of the synthetic reinforcing body 11 is disposed on the bottom surface of the synthetic reinforcing body 11 and the leg crimping plate 14 a disposed with a gap on both sides in the thickness direction of the synthetic reinforcing body 11. A leg channel 14 comprising a bottom plate 14b is arranged. The leg crimping plate 14a and the bottom plate 14b are metal plates such as a steel plate having a thickness of about 3 mm to 9 mm.

  The PC steel rod 9 penetrates the solidified material 16 filled in the gap between the leg crimping plate 14a and the synthetic reinforcing member 11, the leg crimping plate 14a placed opposite to the lower end portion of the synthetic reinforcing member 11, and the PC steel rod. 9 is fixed to the leg crimping plate 14a with a washer interposed by fixing nuts 10 screwed to both ends thereof.

  By tightening the fixing nut 10, the PC steel bar 9 tightened up compresses the lower end portion of the synthetic reinforcing body 11 and both sides in the thickness direction of the solidified material 16 via the leg crimping plates 14 a disposed opposite to each other. In a state where prestress is applied. An anchor member 15 protruding from the floor portion 4 penetrates the bottom plate 14b and is embedded in the solidified material 16 filled in the gap between the leg crimping plate 14a and the synthetic reinforcing body 11, and the anchor member The lower end portion of the synthetic reinforcing body 11 is fixed to the floor portion 4 with a washer interposed by a fixing nut 10 screwed into the floor 15.

  Alternatively, as illustrated in FIG. 5, the bottom surface of the bottom plate 14 b of the leg channel 14 is bonded to the floor portion 4 with an adhesive 17 such as an epoxy resin, and the lower end portion of the synthetic reinforcing body 11 is fixed to the floor portion 4. You can also

  Alternatively, as illustrated in FIG. 6, without using the leg channel 14, a leg crimping plate 14 a disposed at the lower end of the synthetic reinforcing body 11 with a gap on both sides in the thickness direction of the synthetic reinforcing body 11. It is also possible to fix the lower end portion of the synthetic reinforcing body 11 to the floor portion 4.

  The PC steel rod 9 penetrates the solidified material 16 filled in the gap between the leg crimping plate 14a and the synthetic reinforcing member 11, the leg crimping plate 14a placed opposite to the lower end portion of the synthetic reinforcing member 11, and the PC steel rod. 9 is fixed to the leg crimping plate 14a with a washer interposed by fixing nuts 10 screwed to both ends thereof.

  By tightening the fixing nut 10, the PC steel bar 9 tightened up compresses the lower end portion of the synthetic reinforcing body 11 and both sides in the thickness direction of the solidified material 16 via the leg crimping plates 14 a disposed opposite to each other. In a state where prestress is applied. The anchor member 15 protruding from the floor portion 4 is embedded in the solidified material 16 filled in the gap between the leg crimping plate 14a and the synthetic reinforcing body 11, and fixes the lower end of the synthetic reinforcing body 11 And fix to the floor portion 4.

  In addition to the above-described structure, the synthetic reinforcing body 11 may be configured by a steel pipe 13b and concrete 12b filled therein, as illustrated in FIG. The synthetic reinforcing body 11 in FIG. 7A is a steel pipe 13b having a rectangular cross section filled with concrete 12. The synthetic reinforcement body 11 of FIG.7 (b) fills the concrete 12 in the steel pipe 13b of a circular cross section. Various shapes, such as a polygon and an ellipse, can be adopted for the cross section of the synthetic reinforcing body 11.

  Moreover, in the synthetic reinforcement 11 which filled the steel pipe 13b with the concrete 12b, since the steel pipe 13b exhibits the function of the reinforcing bar of a reinforced concrete, it is not necessary to embed a reinforcing bar in the concrete 12b, but the reinforcing bar was embedded as needed. It can also be a specification. The synthetic reinforcing body 11 may be a pre-manufactured product (precast material) manufactured in advance in a factory or the like, or may be manufactured by placing concrete in the field construction. When pre-manufactured products are used, construction time and labor on site can be reduced.

  In the reinforcement of the column part 3 and the beam part 2, the strength of the prestress to be applied is adjusted by adjusting the strength of the tightening of the fixing nut 10, for example, a strain strain of about 0.1% is applied to the PC steel bar 9. Then, the opposed reinforcing plates are pressure-bonded to members sandwiched between the reinforcing plates so as not to be displaced when subjected to a shearing force.

  The same applies to the case where prestress is applied to the reinforced concrete wall 12a by the crimping plate 13a. The same applies to the case where prestress is applied to the lower end portion of the synthetic reinforcing body 11 by the leg channel 14 (leg crimping plate 14a).

  The column part 3 is compressed by the reinforcing plate disposed opposite to the reinforcing plate channel 7 together with the solidified material 16 filled in the periphery of the column part 3 and prestressed. The beam portion 2 is compressed by the opposing reinforcing plate 8 together with the solidified material 16 filled in the periphery of the beam portion 2, and prestress is applied. Therefore, not only can the lateral toughness of the concrete structure 1 be improved and the horizontal proof stress increased by the passive lateral restraint effect (the restraint reaction force generated only when the concrete expands), but the active lateral restraint effect ( It is also possible to obtain a restraining force applied from the beginning irrespective of the expansion of the concrete. That is, the reinforcing strength is remarkably increased by securing a large horizontal shearing force and a high toughness while avoiding the protrusion, peeling, and peeling of the concrete 6 of the column portion 3 and the beam portion 2 during an earthquake. In addition, since the three directions of the column portion 3 are wound around the reinforcing plate channel 7 (reinforcing plate), the shear strength and toughness of the column portion 3 are improved.

  Therefore, the concrete structure 1 side to which the composite reinforcing body 11 is fixed has a structure that is difficult to be damaged during an earthquake, and the integrity of the composite reinforcing body 11 and the concrete structure 1 is also improved.

  In addition, since the thickness t of the synthetic reinforcing body 11 is appropriately adjusted to be thinner than the thickness T without unnecessarily adjusting the thickness t of the column portion 3, weight reduction and saving can be achieved. It is advantageous for space. Since the composite reinforcing body 11 is prestressed with the reinforced concrete wall 12a sandwiched between the crimping plates 13a, the horizontal shearing force and high toughness are avoided while preventing the concrete wall 12a from protruding, peeling off and peeling off during an earthquake. The reinforcing strength is remarkably increased.

  Furthermore, by making the ratio of the width W to the height H of the composite reinforcing body 11 10% to 40%, the synthetic reinforcing body 11 can be used as a bending yield type damping material capable of absorbing large plastic energy. It is functioning. In the case of installing a plurality of synthetic reinforcing bodies 11, a bending yield mechanism of the synthetic reinforcing body 11 is secured by opening a gap S1 in the width direction.

  Therefore, in the present invention, it is possible to obtain an excellent reinforcing effect and earthquake resistance effect while suppressing the thickness of the synthetic reinforcing body 11 that is a reinforcing material. When a larger horizontal proof stress is required, it can be dealt with by increasing the number of the synthetic reinforcing bodies 11.

  When a sleeve wall or a window frame is provided adjacent to the pillar portion 3 of the concrete structure 1 to be reinforced, the reinforcement plate (reinforcement plate channel 7) is attached to the pillar portion 3 as in the above embodiment. Cannot wind up in the direction. In such a case, the reinforcement structure of the column part 3 can be illustrated in FIG.

  In the reinforcing structure of FIG. 8, instead of the reinforcing plate channel 7 illustrated in FIG. 2, a facing reinforcing plate 8 is provided. The opposed reinforcing plate 8 is a metal plate such as a steel plate having a thickness of about 3 mm to 9 mm, protrudes on both sides in the width direction of the column part 3 (both sides in the left-right direction in FIG. 8), and is approximately the same as the thickness of the column part 3. Is arranged in.

  The reinforcing plate 8 placed between the both sides of the column part 3 in the width direction, and the solidified material 16 filled and solidified between the arranged reinforcing plates 8 on both sides of the column part 3 in the width direction, and the arranged reinforcing plate 8 The PC steel rod 9 penetrating through is tightened, and the opposing reinforcing plate 8 compresses both sides of the column portion 3 and the solidified material 16 in the thickness direction so that prestress is applied.

  The seismic reinforcement structure of the present invention can be applied not only to one span between two adjacent column portions 3 but also continuously over a plurality of spans. When the seismic reinforcement structure is constructed and installed over a plurality of spans, the pillar portion 3 located in the middle of the span has a reinforcement structure as illustrated in FIG.

  In the present invention, the synthetic reinforcing body 11 can be installed at an arbitrary position in the width direction between the pillar portions 3 on both sides. In FIG. 10, two composite reinforcing bodies 11 juxtaposed with a gap S <b> 1 in the width direction form one unit, and the one unit is installed at an intermediate position between the column portions 3 on both sides. In this installation example, a path can be formed between the reinforcing plate channel 7 that reinforces each column portion 3 and the synthetic reinforcing body 11 adjacent thereto.

  In FIG. 11, six synthetic reinforcing bodies 11 are installed so as to substantially close the space between the pillar portions 3 on both sides. A gap S <b> 1 is provided between the adjacent composite reinforcing bodies 11, and a gap S <b> 2 is also provided between the reinforcing plate channel 7 that reinforces each column portion 3 and the adjacent synthetic reinforcing body 11. .

  In FIG. 12, four synthetic reinforcing bodies 11 juxtaposed with a gap S <b> 1 in the width direction form a single unit, and the single unit is disposed on one side of the column portions 3 on both sides. A gap S <b> 2 is also provided between the reinforcing plate channel 7 that reinforces the column part 3 on one side and the synthetic reinforcing body 11 adjacent thereto. In this installation example, a path can be formed between the pillar portion 3 on the other side and the synthetic reinforcing body 11 adjacent thereto.

  In FIG. 13, the two composite reinforcing bodies 11 juxtaposed with a gap S <b> 1 in the width direction form one unit, and the two units are arranged with an interval in the width direction. The interval between the units is a passage. In this installation example, as illustrated in FIG. 14, the reinforcing plate of the reinforcing plate channel 7 in which one end portion in the width direction of the synthetic reinforcing body 11 disposed at the position closest to the column portion 3 faces the column portion 3. The PC steel rod 9 which is disposed between and penetrates the opposed reinforcing plates is also passed through the synthetic reinforcing body 11. And the one end part of this synthetic | combination reinforcement body 11 is fixed integrally with the reinforcement structure of the column part 3, giving prestress with the column part 3 together. In this way, a part of the synthetic reinforcing body 11 can be firmly integrated with the column portion 3.

  The present invention can be applied not only to the existing concrete structure 1 but also to a new construction of the concrete structure 1.

DESCRIPTION OF SYMBOLS 1 Concrete structure 2 Beam part 3 Column part 4 Floor part 5 Reinforcement 6 Concrete 7 Reinforcement plate channel 8 Reinforcement plate 9 PC steel bar (tightening member)
DESCRIPTION OF SYMBOLS 10 Fixing nut 11 Composite reinforcement body 12a Reinforced concrete wall 12b Concrete 13a Crimping plate 13b Steel pipe 14 Leg channel 14a Leg crimping plate 14b Bottom plate 15 Anchor member 16 Solidifying material 17 Adhesive S1, S2 Clearance

Claims (9)

Seismic reinforcement structure for concrete structures with a reinforcing material with the upper end fixed to the beam part and the lower end fixed to the floor part in the open area surrounded by the pillar part, beam part and floor part of the concrete structure In
Respective pillar portions on both sides of the opening region are sandwiched between reinforcing plates that are wound around the three sides of the pillar portion and project in the direction of the other pillar portion, and face each other at substantially the same interval as the thickness of the pillar portion; The solidified material filled and solidified between the opposed reinforcing plates and the fastening member penetrating the opposed reinforcing plates are tightened, and the thickness of both the pillar portion and the solidified material in the thickness direction is increased by the opposed reinforcing plates. Compress to prestressed state,
The reinforcing material is sandwiched between both sides in the thickness direction of the reinforced concrete wall with a crimping plate, tightens the fastening member passing through the crimping plate and the reinforced concrete wall, and compresses both sides in the thickness direction of the reinforced concrete wall with the pressure plate. It is a synthetic reinforcement body in a state where stress is applied, or a synthetic reinforcement body in which concrete is filled in a steel pipe, and the thickness of the synthetic reinforcement body is thinner than the thickness of the column portion, and the synthetic reinforcement body Seismic reinforcement structure for concrete structure, characterized in that the ratio of width to height is 10% to 40%. Seismic reinforcement structure for concrete structures with a reinforcing material with the upper end fixed to the beam part and the lower end fixed to the floor part in the open area surrounded by the pillar part, beam part and floor part of the concrete structure In
Each column part on both sides of the opening region protrudes on both sides in the width direction of the column part, and is sandwiched by reinforcing plates facing each other at substantially the same interval as the thickness of the column part. The solidified material filled and solidified between the opposing reinforcing plates and the fastening member that penetrates the opposing reinforcing plates are tightened, and the opposing reinforcing plates compress the both sides of the pillar part and the solidifying material in the thickness direction. In a prestressed state,
The reinforcing material is sandwiched between both sides in the thickness direction of the reinforced concrete wall with a crimping plate, tightens the fastening member passing through the crimping plate and the reinforced concrete wall, and compresses both sides in the thickness direction of the reinforced concrete wall with the pressure plate. It is a synthetic reinforcement body in a state where stress is applied, or a synthetic reinforcement body in which concrete is filled in a steel pipe, and the thickness of the synthetic reinforcement body is thinner than the thickness of the column portion, and the synthetic reinforcement body Seismic reinforcement structure for concrete structure, characterized in that the ratio of width to height is 10% to 40%.   The upper end portion of the composite reinforcing body located in the lower vicinity of the beam portion and both sides in the thickness direction of the beam portion are sandwiched between opposed reinforcing plates, and the solidified solidified material filled between the opposed reinforcing plates is disposed. The fastening member penetrating the reinforcing plate and the beam portion is tightened, and the solidifying material, the facing reinforcing plate and the fastening member penetrating the upper end portion of the composite reinforcing body are tightened, and the facing reinforcing plate allows the beam portion, The concrete structure according to claim 1 or 2, wherein the upper end portion of the synthetic reinforcing body and both sides in the thickness direction of the solidified material are compressed and prestressed, and the upper end portion of the synthetic reinforcing body is fixed to the beam portion. Seismic reinforcement structure.   A leg channel consisting of a leg crimping plate arranged with a gap on both sides in the thickness direction of the synthetic reinforcement and a bottom plate arranged on the bottom of the synthetic reinforcement is arranged at the lower end of the synthetic reinforcement. The solidified material filled in the gap between the leg crimping plate and the synthetic reinforcement, the leg crimping plate placed opposite to the fastening member penetrating the lower end of the synthetic reinforcement, and the leg crimping plate placed opposite to each other By compressing the both ends in the thickness direction of the synthetic reinforcing body and the solidified material in a prestressed state, the anchor member protruding from the floor portion is passed through the bottom plate and the leg crimping plate. The seismic reinforcement structure for a concrete structure according to any one of claims 1 to 3, wherein the structure is embedded in a solidified material filled with a gap between the composite reinforcement body and the lower end portion of the synthetic reinforcement body is fixed to the floor portion.   A leg channel consisting of a leg crimping plate arranged with a gap on both sides in the thickness direction of the synthetic reinforcement and a bottom plate arranged on the bottom of the synthetic reinforcement is arranged at the lower end of the synthetic reinforcement. The solidified material filled in the gap between the leg crimping plate and the synthetic reinforcement, the leg crimping plate placed opposite to the fastening member penetrating the lower end of the synthetic reinforcement, and the leg crimping plate placed opposite to each other By compressing both the lower end portion of the synthetic reinforcing body and the thickness direction both sides of the solidified material to give a prestress, and bonding the bottom surface of the bottom plate to the floor portion with an adhesive, the lower end portion of the synthetic reinforcing body The seismic reinforcement structure for a concrete structure according to any one of claims 1 to 3, wherein the structure is fixed to a floor portion.   At the lower end of the synthetic reinforcing body, a leg crimping plate was arranged with a gap on both sides in the thickness direction of the synthetic reinforcing body, and a solidified material filled in the gap between the leg crimping plate and the synthetic reinforcing body was placed. The fastening member penetrating the leg crimping plate and the lower end of the synthetic reinforcing member is tightened, and the lower end of the synthetic reinforcing member and both sides in the thickness direction of the solidified material are compressed by the opposed leg crimping plates. The anchor member protruding from the floor part under stress is embedded in the solidified material filled in the gap between the leg crimping plate and the synthetic reinforcement, and the lower end of the synthetic reinforcement is fixed to the floor part. The seismic reinforcement structure for a concrete structure according to any one of claims 1 to 3.   The seismic reinforcing structure for a concrete structure according to any one of claims 1 to 6, wherein a plurality of the synthetic reinforcing bodies are arranged with a gap in the width direction.   The gap in the width direction is provided between the synthetic reinforcing body arranged at a position closest to the pillar portion of the synthetic reinforcing bodies and the reinforcing plate facing the pillar portion. Seismic reinforcement structure for concrete structures as described in Crab.   Among the synthetic reinforcing bodies, one end portion in the width direction of the synthetic reinforcing body arranged at a position closest to the column portion is arranged between the reinforcing plates facing each other with the column portion interposed therebetween, and penetrates the arranged reinforcing plate. The seismic reinforcing structure for a concrete structure according to any one of claims 1 to 7, wherein the binding member is also passed through the synthetic reinforcing body.

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