JP2008267058A - Aseismatic reinforcing structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an aseismatic reinforcing structure for improving an earthquake resistant performance of a structure while forming a structural plane superior in design so as to produce an attractive space. <P>SOLUTION: The aseismatic reinforcing structure for improving an earthquake resistant performance of a structure having a column/beam frame 1 is composed of a semi-arcuate-shaped brace material 4 which is provided within a structural plane 2 of the column/beam frame 2 and an annular-shaped buckling prevention material 5 which is provided at a corner of the structural plane 2 of the column/beam frame 2 and is also connected to a middle portion of the brace material 4 for preventing the brace material 4 from buckling. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a seismic reinforcement structure for a structure including a column beam frame.

  Conventionally, in order to improve the seismic performance of a structure, there is a technique of installing a steel brace in the surface of a column beam frame. As the steel brace, a straight steel frame material is usually used, and it is often installed in a K shape or an X shape in the construction surface. Conventionally, a mansard type steel brace may be used. This mansard-shaped steel brace has a shape in which the middle part is refracted. For this reason, the space between the left and right steel braces is widened, and the area of the opening formed between the steel braces can be increased (see, for example, Patent Document 1).

In recent years, a technique has been proposed in which a curved steel brace is installed in the surface of a column beam frame. According to this curved steel brace, since the steel brace exhibits a sticky bending property, the proof stress and toughness of the structure can be improved (see, for example, Patent Document 2).
Japanese Patent Laid-Open No. 11-324342 Japanese Patent Laid-Open No. 10-30274

  However, the conventional technology using the above-described K-shaped, X-shaped, or Mansard-shaped steel brace greatly restricts and affects the elevation design of the surface. For this reason, there is a problem that the seismic performance is improved and improved from a structural point of view, but is often negative from a design point of view.

  Moreover, in the conventional technique using the above-described curved steel brace, the steel brace may be buckled. When the steel brace is buckled, there arises a problem that the earthquake resistance due to the steel brace cannot be expected.

  The present invention takes the above-mentioned conventional problems into consideration and improves seismic performance of the structure, and also provides seismic reinforcement capable of producing an attractive space by forming a structural surface with excellent design. Its purpose is to provide a structure.

  The seismic reinforcement structure according to the present invention is a seismic reinforcement structure that improves the seismic performance of a structure including a column beam frame. The semi-arc-shaped brace material provided in the surface of the column beam frame, and the column beam An annular buckling prevention material disposed at a corner of the frame construction surface and joined to an intermediate portion of the brace material to prevent buckling of the brace material is provided. Yes.

  With such a feature, the column beam frame is reinforced with the brace material, and the buckling of the brace material is prevented by the buckling prevention material. In addition, a semicircular opening is formed in the construction surface of the column beam frame by the semicircular arc-shaped brace material, and circular openings are formed at both corners of the construction surface by the annular buckling prevention material. .

  The seismic reinforcement structure according to the present invention includes a rectangular frame member provided in the structural surface and joined to the column beam frame via a grout, and the brace material is inscribed in the frame member. It is preferable that the buckling prevention material is inscribed in a substantially triangular frame corner made of the vertical member, the horizontal member, and the brace member of the frame member.

  Thereby, the brace material and the buckling prevention material are installed in the construction surface of the concrete column beam structure.

  In the earthquake-proof reinforcement structure according to the present invention, it is preferable that at least one of the inside of the buckling prevention material and the outside of the buckling prevention material in the corner is hollow.

  Thus, not only the corners of the composition surface are decorated, but also lighting from the corners of the composition surface or ventilation at the corners of the composition surface is possible.

  According to the seismic reinforcement structure according to the present invention, the semi-arc-shaped brace material and the ring-shaped buckling prevention material can improve the seismic performance of the structure and form a structure with excellent design. And you can produce an attractive space.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a seismic reinforcement structure according to the present invention will be described with reference to the drawings.
FIG. 1 is an elevational view showing the seismic reinforcement structure in the present embodiment, FIG. 2 is a cross-sectional view between AA shown in FIG. 1, and FIG. 3 is a cross-sectional view between BB, FIG. 4 is a cross-sectional view taken along the line C-C.
In the present embodiment, the left side in FIG. 2 is the indoor side, and the right side is the outdoor side.

  As shown in FIGS. 1 to 4, the seismic reinforcement structure in the present embodiment is a reinforcement structure constructed in order to improve the seismic performance of an existing structure, and the surface 2 of the column beam frame 1 of the structure. Built in. More specifically, this seismic reinforcement structure has a structure in which a seismic reinforcement frame 9 composed of a frame material 3, a brace material 4, and a buckling prevention material 5 is incorporated in the structural surface 2 of the column beam frame 1. ing. The column beam frame 1 is a concrete frame, and is composed of upper and lower beams 10 and 10 and left and right columns 11 and 11. In addition, under the upper and lower beams 10, 10, reinforced concrete structure increased hitting portions 10 a, 10 b integrated with the existing beams 10, 10 are formed, respectively.

  The frame member 3 is a rectangular steel frame provided in the structural surface 2 of the column beam frame 1. The frame member 3 extends horizontally along the beams 10 and 10 and the columns 11 and 11. It is comprised from the vertical members 32 and 32 extended perpendicularly | vertically along. The steel frame material constituting the frame material 3 is made of H-shaped steel with a flange 3 a extending along the surface 2 of the column beam frame 1. More specifically, the steel frame has a configuration in which a portion on the outer peripheral side of the web 3b is cut out of one flange (a room side) of the H-shaped steel. Mounting plates 3c and 3c arranged on the extended line of the web 4b of the brace material 4 are welded to the central portion of the upper horizontal member 31. In addition, attachment plates 3d and 3d arranged on the extended line of the web 4b of the brace material 4 are welded to the lower portions of the vertical members 32 on both sides. Further, on the web 3b of the frame member 3, a plurality of stud divels 30 are provided at predetermined intervals so as to protrude from the outer circumferential web surface. A plurality of the stud dowels 30 are arranged in parallel over the entire circumference of the frame member 3.

  Further, a grout 6 such as a non-shrink mortar is filled between the web 3 b of the frame member 3 and the inner peripheral surface 1 a of the column beam frame 1 facing the web 3 b, and the frame member 3 is interposed via the grout 6. It is joined to the column beam frame 1. In the grout 6, the plurality of stud dowels 30 are embedded. In addition, a plurality of anchors 7 projecting from the inner peripheral surface 1a of the column beam frame 1 are arranged at a predetermined interval, and these anchors 7 are embedded in the grout 6, respectively. ing. The anchor 7 provided on the lower beam 10A and the pillars 11 on both sides is a post-installed anchor such as a chemical anchor. On the other hand, the anchor 7 protruding from the upper beam 10A is a pre-installed anchor that is arranged in advance before the concrete placement of the increased hitting portion 10a and is fixed in the beam 10A. A post-installed anchor can be used as the anchor 7 provided on the upper beam 10A.

  Further, split reinforcing bars 8A and 8B are embedded in the grout 6 to prevent the grout 6 from being split. More specifically, a ladder bar 8A is arranged between the beam 10 and the horizontal member 31, and a spiral line 8B is arranged between the column 11 and the vertical member 32. Yes.

  The brace material 4 is a steel brace provided on the inner side of the frame material 3 (in the construction surface 2 of the column beam frame 1), and is curved in a semicircular arc shape centering on the center in the length direction of the lower horizontal frame member 31. It has been done. The brace material 4 is inscribed in the frame material 3, and the central portion of the brace material 4 in the axial direction is connected to the center of the upper beam 10 </ b> A via the frame material 3 and the grout 6. The both ends of the brace material 4 are connected to the pillars 11 on both sides via the frame material 3 and the grout 6.

  If it demonstrates in detail, the brace material 4 will consist of H-section steel in which the flange 4a extends along the construction surface 2 of the column beam frame 1. The center portion of the brace material 4 has its flange 4a butt welded to the flange 3a of the upper horizontal member 31, and its web 4b is butt welded to the mounting plate 3c described above, so that the upper horizontal member It is joined to the center of 31. Further, both ends of the brace material 4 are welded to the flanges 3a of the vertical members 32, 32 on both sides, and the web 4b is butt welded to the mounting plate 3d. Are joined to lower portions of the vertical members 32, 32, respectively.

  The buckling prevention member 5 is a member that is joined to the intermediate portion of the brace member 4 to prevent the brace member 4 from buckling. The buckling prevention member 5 is provided at each of the upper corners in the construction surface 2 of the column beam frame 1. This is an annular steel frame material. The buckling prevention member 5 is configured to be inscribed in a substantially triangular frame corner 33 formed by the upper horizontal member 31, the vertical member 32, and the brace member 4, and the frame member 3 and the grout 6. Are connected to the upper beam 10 </ b> A and the column 11 via the brace 4 and to the brace material 4. That is, the buckling prevention material 5 is interposed between the column beam frame 1 (upper beam 10A and column 11) and the brace material 4.

  If it demonstrates in detail, the buckling prevention material 5 will consist of H-section steel in which the flange 5a extends along the construction surface 2 of the column beam frame 1. FIG. The flange 5a of the buckling prevention material 5 is butt welded to the flange 3a of the upper horizontal member 31, the flange 3a of the vertical member 32, and the flange 4a of the brace material 4, respectively. It is joined to the longitudinal member 32 and the brace material 4, respectively.

  Further, the inside of the annular buckling prevention material 5 and the outside of the buckling prevention material 5 in the upper corners (frame corner portions 33 on both sides) of the frame material 3 on which the buckling prevention material 5 is arranged are , Each is hollow. Both ends of the frame corner portion 33 in the depth direction (direction perpendicular to the construction surface 2) are open to the indoor side and the outdoor side, respectively.

  Next, the construction method of the seismic reinforcement structure which consists of an above-described structure is demonstrated.

First, in a factory or the like, the frame material 3, the brace material 4 and the buckling prevention material 5 are integrally manufactured, and the process of manufacturing the seismic reinforcement frame 9 is performed.
On the other hand, in the column beam frame 1, a preparatory process for forming an earthquake-proof reinforcement structure is performed. More specifically, the increased hitting portions 10a and 10b are formed below the upper and lower beams 10 and 10, and the anchors 7 are installed on the inner peripheral surface 1a of the column beam frame 1.

  Next, the process of carrying the seismic reinforcement frame 9 into the site and placing it in the construction surface 2 of the column beam frame 1 is performed. At this time, the seismic reinforcement frame 9 is positioned at a predetermined position in the construction surface 2 of the column beam frame 1 and temporarily supported by a temporary receiving material (not shown).

  Next, the step of welding the stud gibels 30 ... to the web 3b of the frame member 3 and arranging the split reinforcing bars 8A, 8B between the web 3b of the frame member 3 and the inner peripheral surface 1a of the column beam frame 1 is performed. I do. At this time, the outer peripheral side half of the flange 3a on the indoor side of the frame member 3 is cut off, so that the side surface on the indoor side of the space between the web 3b of the frame member 3 and the inner peripheral surface 1a of the column beam frame 1 is opened. Therefore, the stud gibber 30... Is welded and the split reinforcing bars 8A and 8B are arranged from the open indoor side surface.

  Next, the process of filling the grout 6 in the space between the web 3b of the frame member 3 and the inner peripheral surface 1a of the column beam frame 1 is performed. More specifically, after a retaining frame (not shown) is built on the side surface of the indoor side where the space is open, the grout 6 is injected inside the retaining frame by a known method. After the grout 6 is solidified, the retaining frame is disassembled and removed.

  According to the seismic reinforcement structure having the above-described configuration, the column beam frame 1 is reinforced by the brace material 4, so that the seismic performance of the structure can be improved. Moreover, since the buckling prevention material 5 prevents buckling of the brace material 4, the seismic performance of the structure can be greatly improved.

  Further, the semicircular arc-shaped brace material 4 forms a semicircular opening in the structural surface 2 of the column beam frame 1, and the annular buckling prevention material 5 forms both upper corners of the structural surface 2. Since the circular opening is formed, it is possible to produce an attractive space by forming the composition surface 2 having excellent design.

For example, as shown in FIG. 5, a glass screen 20 is installed on the outdoor side of the column beam frame 1. As a result, a large-area semi-circular window reminiscent of a circular window often found in a tea room or the like is formed on the structural surface 2 of the column beam frame 1, and a Japanese-style space can be produced. It is also possible to fit a semicircular glass inside the semicircular arc shaped brace material 4.
Further, the horizontal member 31 on the lower side of the frame member 3 is covered with a top plate 21 and a waist plate 22 made of, for example, granite. Thereby, the designability of the construction surface 2 of the column beam frame 1 is further improved.
Furthermore, both ends of the frame corner 33 in the depth direction are closed with the decorative plate 23, respectively. The decorative plate 23 has a design-shaped opening 23a. As a result, the light is taken from the opening 23a described above, and at this time, a circular shape reminiscent of a circular window is raised by the annular buckling prevention material 5, and the design of the construction surface 2 is improved.

  Moreover, according to the earthquake-proof reinforcement structure which consists of an above-described structure, the rectangular frame material 3 joined to the column beam frame 1 via the grout 6 is provided, the brace material 4 is inscribed in the frame material 3, and the frame Since the buckling prevention material 5 is inscribed in the frame corner 33 of the material 3, the brace material 4 and the buckling prevention material 5 are easily and reliably installed in the construction surface 2 of the concrete column beam frame 1. be able to.

  Moreover, according to the earthquake-proof reinforcement structure which consists of an above-described structure, in the inside of the annular buckling prevention material 5, and in the both corners (frame corner part 33 of the frame material 3) of the construction surface 2 of the column beam frame 1 Since the outside of the buckling prevention material 5 is hollow, not only the corners of the construction surface 2 are decorated and the design is improved, but also the lighting from the corners of the construction surface 2 as shown in FIG. Or can be ventilated at the corners of the construction surface 2.

  As mentioned above, although embodiment of the earthquake-proof reinforcement structure which concerns on this invention was described, this invention is not limited to above-described embodiment, In the range which does not deviate from the meaning, it can change suitably. For example, in the above-described embodiment, the brace material 4 has a semicircular arc shape that swells upward, the central portion of the brace material 4 is connected to the center of the upper beam 10A, and both end portions of the brace material 4 are on both sides. Although connected with the lower part of the pillars 11 and 11, the present invention may be provided with a brace material obtained by inverting the above-described brace material 4 up and down. That is, the brace material has a semicircular arc shape that swells downward, the central portion of the brace material is connected to the center of the lower beam 10B, and both end portions of the brace material are connected to the upper portions of the columns 11 and 11 on both sides. It may be a configured.

  In the embodiment described above, both ends of the brace material 4 are connected to the lower portions of the pillars 11 and 11 on both sides. However, in the present invention, both ends of the brace material 4 are connected to both ends of the lower beam 10B. The structure connected, or the structure connected with the junction part of the lower beam 10B and the pillar 11 may be sufficient. Of course, the same applies to the case of the brace material inverted upside down as described above, and both ends of the semicircular arc-shaped brace material bulging downward are connected to both ends of the upper beam 10A, or The structure connected with the junction part of 10 A of upper beams and the pillar 11 may be sufficient.

  In the above-described embodiment, the buckling prevention material 5 is joined to the upper horizontal member 31, the vertical member 32, and the brace material 4, respectively, and the upper beam 10A, the column 11, and the brace material 4 are joined. However, the present invention may be configured such that a buckling prevention material 5 is interposed between one of the beam 10 and the column 11 and the brace material 4. . For example, the buckling prevention material 5 may not be joined to the vertical member 32 but may be joined to the upper horizontal member 31 and the brace material 4, or the upper horizontal member 31. It may be the structure joined to the vertical member 32 and the brace material 4, respectively.

  Moreover, in the above-described embodiment, the seismic reinforcement structure is constructed for the existing column beam frame 1, but the seismic reinforcement structure according to the present invention is constructed in the column beam frame when newly constructing a structure. It is also possible.

  Further, in the above-described embodiment, the frame member 3 has a shape surrounded by a square, but the present invention is a portal frame member without the horizontal member 31 along the lower (other) beam 10B. There may be. That is, it is also possible to use a frame member made up of the horizontal member 31 on one side to which the central portion of the brace material 4 is joined and the vertical members 32, 32 on both sides. It is also possible to use a frame material having a configuration in which a part of the other horizontal member 31 is cut off.

  In the above-described embodiment, the seismic reinforcement structure for the concrete column beam frame 1 is described. However, the seismic reinforcement structure according to the present invention can be applied to column beam frames of other structures. It is. For example, the present invention can be applied to a steel beam-column frame.

  In the above-described embodiment, the brace material 4 and the buckling prevention material 5 are provided in the frame material 3, and the frame material 3 is joined to the column beam frame 1 via the grout 6. In the present invention, the frame material 3 and the grout 6 may be omitted, and the brace material 4 and the buckling prevention material 5 may be installed in the construction surface 2 of the column beam frame 1. For example, in the case of the column beam frame 1 including a steel beam and a steel column, the brace material 4 and the buckling prevention material 5 may be welded or bolted to the steel beam or the steel column.

  Further, in the above-described embodiment, the inside of the annular buckling prevention material 5 and the outside of the buckling prevention material 5 in the corner of the construction surface 2 of the column beam frame 1 are hollow, In the present invention, only one of the inside of the annular buckling prevention material 5 and the outside of the buckling prevention material 5 in the corner of the construction surface 2 of the column beam frame 1 is hollow. Also good. Furthermore, in the present invention, both the inside and outside of the buckling prevention material described above may not be hollow. For example, a structure in which concrete or mortar or the like is filled inside the buckling prevention material 5 may be used, or a structure in which concrete or mortar or the like is filled in the frame corner portion 33 outside the buckling prevention material 5 may be used. Good.

  Further, in the above-described embodiment, the buckling prevention materials 5 and 5 are respectively disposed at both corners of the column beam frame 1, but the present invention is any one of both corners of the column beam frame 1. The buckling prevention material 5 may be disposed only on the surface.

  In addition, in the range which does not deviate from the main point of this invention, it is possible to replace suitably the component in above-mentioned embodiment with a well-known component, and you may combine the above-mentioned modification suitably.

It is an elevation view for explaining an embodiment of the present invention. It is sectional drawing between AA shown in FIG. It is sectional drawing between BB shown in FIG. It is sectional drawing between CC shown in FIG. It is a perspective view for demonstrating embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Column beam frame 2 Frame 3 Frame material 4 Brace material 5 Buckling prevention material 10 Beam 10A Upper beam (one beam)
10B Lower beam (the other beam)
11 Pillar 31 Horizontal member 32 Vertical member 33 Corner of frame

Claims (3)

In the seismic reinforcement structure that improves the seismic performance of structures with column beam frames,
A semicircular arc shaped brace material provided in the surface of the column beam frame;
An annular buckling prevention material disposed at a corner of the surface of the column beam frame and joined to an intermediate portion of the brace material to prevent buckling of the brace material;
Seismic reinforcement structure characterized by being equipped with. In the earthquake-proof reinforcement structure according to claim 1,
A rectangular frame material provided in the construction surface and joined to the column beam frame via a grout is provided,
The brace material is inscribed in the frame material,
An anti-seismic reinforcing structure, wherein the buckling prevention material is inscribed at a corner portion of a substantially triangular frame comprising the vertical member, the horizontal member and the brace member of the frame member. In the earthquake-proof reinforcement structure according to claim 1 or 2,
At least one of the inner side of the buckling prevention material and the outer side of the buckling prevention material in the corner is hollow.

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