JP2019100128A - Building reinforcement structure, building reinforcement method and column reinforcement member - Google Patents

Abstract

To provide a building reinforcement structure, a building reinforcement method and a column reinforcement member which can improve a design property of a building and a landscape from a building.SOLUTION: A building reinforcement structure comprises: a reinforcement portion 30 reinforcing a building column at an outside of the building; a fixing member 35 installed at a position corresponding to a column-beam joint portion of the building at an outside of the reinforcement portion 30; and a brace unit 40. The brace unit 40 is constituted of an annular deformation restricting member 41 fixed to the fixing member 35 that is integrated with an X-shaped restraining member 45 restricting deformation of the deformation restricting member 41 inside the deformation restricting member 41.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a building reinforcing structure for reinforcing an existing building, a building reinforcing method, and a column reinforcing member.

  In order to improve the earthquake resistance of a building, it is sometimes necessary to reinforce an existing building. In this case, there is disclosed a technique of additionally arranging a brace for obliquely connecting a joint of a column and a beam in a building (see, for example, Non-Patent Document 1). In the seismic reinforcement method of Non-Patent Document 1, a damper brace composed of an X-shaped brace and a damper provided at the center is used to absorb seismic energy by deforming the central damper and to absorb earthquake energy. Reduce vibration.

  Moreover, the reinforcement structure which provided the connection material (brace material) by pin connection diagonally at the beam-to-column connection part of the existing building is also examined (for example, refer patent document 1). In the reinforcing structure described in Patent Document 1, a base plate attached to the outer surface of a frame of a building, a solidifying material made of mortar or the like formed in a gap between the frame and the base plate, and the base plate A shaft pin set in the normal direction of the base plate, an outer cylinder portion fitted with the shaft pin and pivoted about the shaft pin, and a connection material for reinforcing the building having the outer cylinder portion at both ends . Then, the outer cylindrical portion provided with the connection material is fitted to the shaft pin, and the pair of shaft pins are pin-connected with the connection material.

JP, 2009-203764, A

Obayashi, "Aseismatic reinforcement method for viaduct Compression type steel damper brace method Reduces the vibration of viaduct without anchor", [online], [search on May 8, 2017], Internet, <URL: https: / /www.obayashi.co.jp/service_and_technology/related/tech_d079>

  As described in Patent Document 1, in order to reinforce a building, a thick diagonal member (reinforcement) and a square frame for attaching it are arranged on the outer wall surface. In this case, since the reinforcing member has a sense of presence, the overall design of the exterior of the building is not good. Moreover, since a thick reinforcement member is arrange | positioned on the outer side of the opening part of the building where a window etc. are arrange | positioned, the scenery from the inside of a building is not good.

  -A building reinforcing structure for solving the above problems is disposed outside the building and installed at a position corresponding to a reinforcing portion for reinforcing a pillar of the building and a beam-to-beam joint of the building outside the reinforcing portion. The fixed member, the annular deformation limiting member fixed to the fixed member, and the constraining member for enhancing the buckling resistance of the deformation limiting member inside the deformation limiting member. Thus, since the reinforcing portion is provided, the deformation performance of the building can be improved, and furthermore, the performance of the deformation restricting member can be exhibited as a reinforcement effect. In addition, since the buckling resistance and the rigidity of the ring-shaped deformation control member can be enhanced by the restraint member, the design of the building can be improved and the view from the building can be improved.

  -In the above-mentioned building reinforcement structure, it is preferred to fix a brace unit with which the above-mentioned deformation control member and the above-mentioned restraint member were unified to the above-mentioned fixed member. Thereby, a building reinforcement structure can be installed efficiently.

  -In the above-mentioned building reinforcement structure, it is preferred that the above-mentioned reinforcement part is constituted using a pillar reinforcement member provided with a reinforcement plate by which the above-mentioned fixed member was beforehand provided in the outside. Thereby, since the fixing member is also installed by the installation of the column reinforcing member, the fixing member can be efficiently fixed.

  -In the above-mentioned building reinforcement structure, it is preferred that the fixed member has a plate-shaped member which fixes a plurality of adjacent deformation control members. Thereby, a plurality of adjacent deformation control members can be fixed along both sides of the plate-like member.

  -A building reinforcement method for solving the above problems is to attach a column reinforcement member provided with a reinforcement plate to the outside of a pillar of a building to form a reinforcement part, and to a fixing member provided on the reinforcement plate, seat inside The ring-shaped deformation control member in which the restraint member which raises bending resistance is arranged was fixed. Thereby, while improving the designability of a building, the building reinforcement structure which can improve the scenery from a building can be installed efficiently.

  In the above-described method of reinforcing a building, it is preferable that the brace unit in which the deformation restricting member and the restraining member are integrated be fixed to the fixing member. Thereby, the deformation | transformation control member of a building reinforcement structure can be installed efficiently.

  The column reinforcing member for solving the above problems is a column reinforcing member attached to the outside of a column of a building to reinforce the column, and a reinforcing plate attached to the building and an outer surface of the reinforcing plate, And a fixing member for fixing an end of the annular deformation limiting member. Thereby, while improving the designability of a building, the building reinforcement structure which can improve the scenery from a building can be installed efficiently.

  -In the above-mentioned pillar reinforcement member, it is preferred that the above-mentioned reinforcement plate is attached to the outer wall of the above-mentioned building, and forms the space which fills up mortar. Thereby, mortar can be filled in the space formed by arranging the reinforcing plate on the outer wall of the building, and pillar reinforcement can be performed.

  According to the present invention, it is possible to improve the design of a building and to improve the landscape from the building.

BRIEF DESCRIPTION OF THE DRAWINGS The perspective view which shows the whole of the building reinforcement structure in embodiment. The perspective view which expanded the principal part of the building reinforcement structure in embodiment. It is an explanatory view explaining a brace unit used for a building reinforcement structure in an embodiment, and (a) is a front view, (b) is a side view. The perspective view explaining the pillar reinforcement member provided with the fixing member used for the building reinforcement structure in embodiment. It is explanatory drawing explaining the attachment state of the building reinforcement structure in embodiment, (a) is sectional drawing of the principal part of a reinforcement pillar, (b) is a front view of the principal part of a reinforcement pillar. The perspective view of the attachment part of the fixing member in embodiment, and a brace unit.

Hereinafter, one embodiment which materialized a building reinforcement structure, a building reinforcement method, and a pillar reinforcement member is explained using Drawings 1-6.
The building 10 shown in FIG. 1 includes a plurality of columns and beams, and is covered with an outer wall 15 having an opening. A window 13 is provided at the opening of the outer wall 15. A building reinforcing structure 20 is provided on the front of the building 10 so as to substantially cover the entire outer wall 15 of the building 10 except for the entrance and exit.

  The building reinforcing structure 20 includes a brace portion 21 and a reinforcing portion 30. The brace portion 21 of the present embodiment is configured by arranging lattice-shaped braces inside a rectangular outer peripheral frame. Specifically, the brace portion 21 includes a triangular end brace unit disposed at an end and a rhombus brace unit 40. Also, the brace portion 21 has a region 25 where the brace unit is not disposed.

  As shown in FIG. 2, the reinforcements 30 extend along the columns of the building 10 and reinforce the columns by being installed on the ground. The reinforcing portion 30 includes a column reinforcing member 31 having a concave cross section, and the concave portion of the column reinforcing member 31 is filled with mortar. On the outer surface of the reinforcing portion 30, a fixing member 35 is provided at a position corresponding to the vicinity of a joint (column-beam joint) between a column and a beam. In the present embodiment, in each reinforcing portion 30, one fixing member 35 is disposed between the floors. The fixing member 35 fixes an end portion of the brace unit 40 disposed vertically and horizontally.

<Structure of Brace Unit 40>
Next, the brace unit 40 will be described with reference to FIG. FIGS. 3A and 3B are a front view and a side view of the brace unit 40, respectively.

  As shown in FIG. 3, in the brace unit 40, an X-shaped restraint member 45 is integrated with the inside of the rhombus-shaped deformation restriction member 41. In the vicinity of each corner of the deformation restricting member 41, a through hole 42 is formed. In FIG. 3, the thicknesses of the deformation restricting member 41 and the restraining member 45 and the size of the through hole 42 are shown large.

  The restraint member 45 is constituted by four plate members having the same width as the deformation restricting member 41. When viewed from the front, the restraint member 45 is formed in an X shape in which the opposing plate members (the central portions of the plate members) of the deformation regulating member 41 are connected. In the present embodiment, the tip of the plate member of the restraint member 45 is welded to the inside of the deformation restricting member 41. Therefore, since the restraint member 45 regulates the bending direction of the deformation regulating member 41, the buckling resistance of the deformation regulating member is increased.

<Structure of Column Reinforcing Member 31>
Next, the column reinforcing member 31 will be described in detail with reference to FIG.
The column reinforcing member 31 includes a reinforcing plate 31a extending vertically and a base portion 31b welded to the lower end of the reinforcing plate 31a. The reinforcing plate 31a has a U-shaped cross section including a front plate and two side plates, and is formed of a steel plate of a long object having an opening on the building side (rear surface). The base 31b is placed on the ground. The plurality of fixing members 35 described above are fixed to the front surface (outside) of the reinforcing plate 31a.

  The fixing members 35 are discretely disposed in the vertical direction. The fixing member 35 has an X-shaped front shape, and one end sides of the four plate-shaped members 35 a are welded along the rhombus of the deformation restricting member 41 of the brace unit 40.

Further, the lower end fixing member 36 is fixed to the base portion 31 b. The lower end fixing member 36 has a shape (V shape) only on the upper side of the fixing member 35. Then, in the lower end fixing member 36, one end side portion of the two plate shaped members 36a is welded so that the lower end fixing member 36 has a shape along the two sides of the deformation restricting member 41 of the brace unit 40. There is.
Furthermore, through holes 35 h and 36 h are formed at the end of each plate-shaped member 35 a of the fixing member 35 and each plate-shaped member 36 a of the lower end fixing member 36.

<Structure of Reinforcement Portion 30>
Next, the reinforcement part 30 using the pillar reinforcement member 31 is demonstrated using Fig.5 (a). FIG. 5A is a cross-sectional view of the reinforcing portion 30 in which the column reinforcing member 31 is attached to the outer wall of the building 10. In FIG. 5A, the illustration of the brace unit 40 is omitted for the sake of explanation.

  A plurality of anchor bolts 33 are embedded outside the columns 11 of the building 10. A pillar reinforcing member 31 is disposed outside the outer wall 15 so as to surround the anchor bolt 33 projecting from the outer wall 15. A plurality of studs 34 are welded to the inner side surface of the column reinforcing member 31. A mortar 32 is filled in a space surrounded by the column reinforcing member 31 and the outer wall 15.

<Fixing brace unit 40>
Next, a method of fixing the brace unit 40 will be described with reference to FIGS. 2, 5 and 6.
As shown in FIG. 5B, the fixing members 35 fixed to the reinforcing portion 30 fix the end portions (corners) of the deformation restricting member 41 of the brace unit 40 disposed four in the vertical and horizontal directions.

  Furthermore, as shown in FIG. 2, an X-shaped connecting member 55 is disposed between the brace units 40 except for the fixing member 35. Similar to the fixing member 35, the connecting member 55 is formed by welding plate-shaped members so as to have a shape along two sides of the deformation restricting member 41 of the brace unit 40. Similar to the fixing member 35, through holes are formed at each end of the plate-shaped member.

  And as shown in FIG. 6, the cylindrical fitting member 48 in which the screw hole was formed in the center is fitted by 35 h of through-holes of the fixing member 35. As shown in FIG. The fixing bolt B1 is screwed into a position where the through hole 42 of the deformation restricting member 41 of the brace unit 40 and the screw hole of the fitting member 48 are aligned. Furthermore, the outer surface of the fixing bolt B1 is covered with a disc-shaped cap C1. Also, the fitting member 48 is fitted in the through hole of the connecting member 55, and the fixing bolt B1 and the cap C1 are disposed in the same manner as the through hole 35h of the fixing member 35.

<Installation Method of Building Reinforcement Structure 20>
Next, the installation method of the building reinforcement structure 20 which has the structure mentioned above is demonstrated using FIG.

First, in accordance with the structure of the building 10, the brace unit 40 and the column reinforcing member 31 are designed.
Specifically, the distance between the pillars 11 and the beams 12 of the building 10 is specified. Then, based on the reinforcing strength of the building 10, the range (position) to which the fixing members (35, 36) are attached is specified. Next, the size (width and height) of the deformation restricting member 41 of the brace unit 40 is determined according to the specified range and the distance between the column 11 and the beam 12. In this case, the size of the deformation restricting member 41 is determined such that the two ends of the deformation restricting member 41 of the brace unit 40 are attached to the fixing member 35. Then, in accordance with the size of the deformation restricting member 41, the length, angle, and arrangement of the restraining member 45 are determined.

Furthermore, the pillar reinforcing member 31 is designed in accordance with the mounting position of the fixing member 35. Furthermore, according to the shape of the fixing member 35 of the column reinforcing member 31 and the shape of the brace unit 40, the crossing angle of the plate-shaped members of the fixing member 35 and the connecting member 55 is determined to determine the shape.
Then, the brace unit 40 in which the restraint member 45 is welded to the deformation regulating member 41 is manufactured based on the design. Furthermore, depending on the size of the deformation restricting member 41, a triangular end brace is manufactured.

  Further, based on the design, the fixing member 35 is welded and fixed to the reinforcing plate 31 a of the column reinforcing member 31. In this case, the plate-shaped member 35a is welded at the determined crossing angle. Furthermore, the base portion 31 b to which the lower end fixing member 36 is welded is fixed to the column reinforcing member 31. Then, the fitting members 48 are fitted in the respective through holes 35 h and 36 h of the respective fixing members (35 and 36) and the respective through holes of the connecting member 55.

  Next, as shown to Fig.5 (a), the anchor bolt 33 is installed in the outer side (surface side) of the building 10. As shown in FIG. Then, the column reinforcing member 31 to which the plurality of studs 34 are attached is disposed so as to surround the anchor bolt 33. Then, a mortar 32 is filled in a space surrounded by the column reinforcing member 31 and the outer wall 15 of the building 10 to form a reinforcing portion 30. In this case, the fixing member 35 and the lower end fixing member 36 are disposed outside the reinforcing portion 30.

  Next, in the area where the brace unit 40 is disposed, the brace unit 40 is disposed on the left, right, upper and lower sides of each fixing member (35, 36). In this case, both sides of the X-shaped plate-shaped members 35a and 36a of the fixing members (35 and 36) are arranged so as to sandwich the deformation restricting members 41 of the brace units 40. Further, the connecting member 55 is disposed in a portion where the fixing members (35, 36) are not provided in a portion where the plurality of brace units 40 gather.

Then, the through holes 42 of the brace unit 40 are aligned with the screw holes of the fitting members 48 of the corresponding fixing members (35 and 36) and the connecting member 55. Then, the fixing bolt B1 is inserted into the through hole 42 of the brace unit 40 and screwed into the screw hole of the fitting member 48. As a result, the brace unit 40 is fixed to both sides of each plate-shaped member of each fixing member (35, 36) and each plate-shaped member 35 a, 36 a and the connecting member 55.
Then, the surface of the fixing bolt B1 is covered with the cap C1, and the building reinforcing structure 20 is completed.

According to the present embodiment, the following effects can be obtained.
(1) The building reinforcing structure 20 according to the present embodiment includes the reinforcing portion 30 for reinforcing the pillars 11 of the building 10 outside the building 10, the fixing member 35 installed outside the reinforcing portion 30, and the brace unit 40. Have. Thus, the building can be reinforced outside the building 10, and the influence on the inside of the building 10 can be reduced. Further, the load of the brace unit 40 can be supported by a structure in which the existing column 11 is reinforced by the reinforcing portion 30.

  (2) The building reinforcing structure 20 according to the present embodiment includes the annular deformation limiting member 41 fixed to the fixing member 35 and the constraining member 45 that raises the buckling resistance of the deformation regulating member 41 inside the deformation regulating member 41. And have. Therefore, the buckling resistance and the rigidity of the deformation restricting member 41 can be enhanced by the constraining member 45, and the deformation restricting member 41 can be thinned (the cross section of the member can be reduced). Therefore, while improving the designability of a building, the scenery from a building can be improved.

  (3) The brace unit 40 of the present embodiment is configured such that the restraint member 45 is integrated with the inside of the rhombus-shaped deformation control member 41. As a result, by fixing the end of the brace unit 40 to the fixing members (35, 36) and the connecting member 55, the deformation restricting member 41 and the restraining member 45 can be efficiently installed.

  (4) The constraining member 45 of the present embodiment has an X shape in which members connecting the opposite sides of the deformation restricting member 41 are connected in a straight line. As a result, the restraint member 45 can efficiently restrain the deformation of the deformation regulating member 41, and can increase the buckling resistance.

  (5) In the present embodiment, the fixing member 35 includes the plate-shaped member 35 a that fixes the plurality of adjacent deformation restricting members 41. Thereby, the two brace units 40 can be fixed on both sides of the plate-shaped member 35a.

  (6) In the present embodiment, the fixing member 35 is fixed to the reinforcing plate 31 a of the column reinforcing member 31. Thus, by providing the reinforcing portion 30, the fixing member 35 can be installed at the same time.

  (7) The reinforcing plate 31 a of the column reinforcing member 31 of the present embodiment has a U-shaped cross section that forms a space with the outer wall 15 of the building 10. Thus, the column reinforcing member 31 can be disposed outside the building, and the space formed between the column reinforcing member 31 and the outer wall 15 can be filled with mortar to form the reinforcing portion 30.

The above embodiment may be modified as follows.
In the embodiment described above, the deformation restricting member 41 of the brace unit 40 has a rhombus shape. The shape of the deformation control member 41 is not limited to the rhombus shape as long as it is an annular shape using a straight line, and may be, for example, a triangular shape.

  In the embodiment, the constraining member 45 of the brace unit 40 connects the plate members constituting each side in a straight line. The shape of the constraining member 45 is not limited to a linear shape, and may be a curved shape as long as the deformation of the brace unit 40 can be restricted. In this case, for example, a shape such as a decoration mark or a logo may be used.

  In the embodiment, the fixing member 35 and the connecting member 55 have an X shape that fixes the four brace units 40 vertically and horizontally. The fixing member for fixing the deformation restricting member 41 of the brace unit 40 may have any shape as long as the deformation restricting member 41 can be fixed. Further, the number of the deformation restricting members to which the fixing member and the connecting member are fixed is not limited to four, and one or two deformation restricting members may be four or more. For example, when fixing six brace units, the ends of the six plate-shaped members are welded. In this case, six brace units having a triangular deformation limiting member are fixed by one fixing member.

  In the above embodiment, the building reinforcing structure 20 is provided to cover the entire surface of the building 10 except for the entrance and the non-placed area 25. The building reinforcement structure 20 may be provided only in the portion where reinforcement is required. For example, in the building 10, when the reinforcement is required partially, the building reinforcement structure 20 is provided in the necessary area outside the outer wall of the building 10.

  -Although the brace unit 40 and the pillar reinforcement member 31 which were prepared beforehand are used in the said embodiment, the member used for a building reinforcement is not limited to these. For example, although the brace unit 40 in which the restraint member 45 is welded to the deformation regulating member 41 in advance is used, the restraint member 45 may be attached to the deformation regulating member 41 after the deformation regulating member 41 is fixed to the reinforcing portion 30. In addition, although the fixing member 35 is fixed to the reinforcing plate 31 a, the fixing member 35 may be attached to the reinforcing portion 30 after the reinforcing portion 30 is constructed.

  B1: Fixing bolt, C1: Cap, 10: Building, 11: Column, 12: Beam, 15: Outer wall, 20: Building reinforcement structure, 21: Brace part, 25: Area, 30: Reinforcement part, 31: Column reinforcement member , 31a: reinforcing plate, 31b: base portion, 32: mortar, 33: anchor bolt, 34: stud, 35: fixing member, 35a, 36a: plate-shaped member, 35h, 36h, 42: through hole, 36: lower end portion Fixing member, 40: brace unit, 41: deformation restricting member, 45: constraining member, 48: fitting member, 55: connecting member, 57: ridge portion.

Claims (8)

A reinforcement disposed on the outside of the building and reinforcing a pillar of the building;
A fixing member installed at a position corresponding to a beam-to-column joint of the building outside the reinforcing portion;
An annular deformation control member fixed to the fixing member;
A building reinforcing structure comprising: a constraining member that raises the buckling resistance of the deformation restricting member inside the deformation restricting member.   The building reinforcing structure according to claim 1, wherein a brace unit in which the deformation restricting member and the restraining member are integrated is fixed to the fixing member.   The building reinforcing structure according to claim 1 or 2, wherein the reinforcing portion is configured using a column reinforcing member provided with a reinforcing plate in which the fixing member is provided on the outer side in advance.   The building reinforcing structure according to any one of claims 1 to 3, wherein the fixing member has a plate-shaped member for fixing a plurality of adjacent deformation regulating members. Attach a column reinforcement member with a reinforcement plate to the outside of the column of the building to form a reinforcement,
A building reinforcing method characterized in that an annular deformation limiting member in which a constraining member for enhancing a buckling resistance is disposed inside is fixed to a fixing member provided on the reinforcing plate.   The building reinforcing method according to claim 5, wherein a brace unit in which the deformation restricting member and the restraining member are integrated is fixed to the fixing member. A pillar reinforcing member attached to the outside of a pillar of a building to reinforce the pillar,
A reinforcing plate attached to the building;
A pillar reinforcing member characterized in that a fixing member for fixing an end portion of an annular deformation controlling member is provided on an outer side surface of the reinforcing plate.   The column reinforcing member according to claim 7, wherein the reinforcing plate is attached to an outer wall of the building to form a space for filling a mortar.

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