JP4904382B2 - Seismic reinforcement method and structure for existing buildings - Google Patents

Description

  The present invention relates to a seismic reinforcement method and a seismic reinforcement structure for an existing building that improve the earthquake resistance of the existing building.

  For buildings built after the enforcement of the revised Building Standards Act of 1981, earthquake resistance is generally secured, but for buildings built before the enforcement of the revised Building Standards Act of 1986, earthquake resistance There are many things that are insufficient. In fact, most of the buildings that were greatly damaged by the Great Hanshin-Awaji Earthquake were built before the enforcement of the revised Building Standards Act of 1981, and were built after the enforcement of the revised Building Standards Act of 1981. There are reports that there was little damage to the buildings that were constructed.

  Based on the lessons learned from the Great Hanshin-Awaji Earthquake, the government office conducted seismic diagnosis and reinforcement for public buildings built before the enforcement of the revised Building Standards Act of 1981. We are taking measures to reduce damage. For example, the Ministry of Education, Culture, Sports, Science and Technology is promoting the earthquake resistance of public school facilities.

  In addition, in order to promote the earthquake resistance of existing private buildings, each local government has established a subsidy system for seismic diagnosis and reinforcement of existing private buildings.

  Under such circumstances, various methods for improving the earthquake resistance of existing buildings have been proposed to improve the earthquake resistance of existing buildings. For example, in the seismic reinforcement method for an existing building proposed in Patent Document 1, the reinforcing material is separated from the beams positioned at the upper and lower ends of the column on the outer periphery of the column constituting the frame of the existing building. Winding, placing a high-strength mortar between the reinforcing material and the beam, adding an earthquake-resistant element to the opening surrounded by the pillar and the beam, and between the earthquake-resistant element and the reinforcing material It is a method of joining.

Japanese Patent Laid-Open No. 2000-154651 (FIG. 1)

  Since the seismic reinforcement method for existing buildings proposed in Patent Document 1 adds seismic elements to the openings surrounded by pillars and beams, the construction range of the reinforcement work extends over a wide area, which makes the construction large. Had the problem of becoming.

  An object of this invention is to provide the earthquake-proof reinforcement method and earthquake-proof reinforcement structure of the existing building which construction is easy in view of said problem.

  In order to achieve the above object, the seismic reinforcement method for an existing building according to the present invention includes a through hole for filling material injection at a predetermined position around a floor column, and a predetermined area around the column on the upper surface of the floor. A floor steel plate provided with a filler inlet corresponding to the filler injection through-hole is disposed in a region where the upper surface of the floor is covered, and a predetermined vertical direction downward from the lower surface of the floor. A step of disposing an underfloor steel plate corresponding to the above-described steel plate at a position spaced apart, and a state in which the pillar is opened with a predetermined gap at a position spaced apart by a predetermined distance vertically downward from the lower surface of the beam supporting the floor A step of arranging a surrounding intermediate band, a step of arranging a reinforcing member for a beam around the joint between the beam and the column, and a lower surface of the lower band of the column is rolled up on an upper surface of the floor one floor below the floor Positions in contact with the top surface of other steel plates on the floor or The under-column that surrounds the column with a predetermined gap at a position spaced from the upper surface of another floor steel plate, the surface of which is arranged in a region where the upper surface of the floor is one floor below the floor A step of arranging a band; a step of arranging a column reinforcing member surrounding the column between the intermediate band and the under-column bunt; and after the arrangement is completed, a filler is injected from the filler inlet The process to do is provided. In the step of disposing the beam reinforcing member around the joint between the beam and the column, the lower portion of the beam reinforcing member is aligned with the upper surface of the intermediate band, and the upper portion of the beam reinforcing member is below the floor. You may make it also provide the process of arrange | positioning the connection member for connecting between the side-surface edge parts near the said column between the said reinforcement members for beams, inserting in the clearance gap between a steel plate and the said beam.

  In the seismic reinforcement method, the column reinforcing member may include a corner member disposed at a corner portion of the column and a connecting plate member for connecting the corner members to each other. Or in the said earthquake-proof reinforcement method, you may make it the said column reinforcement member have a plate member whose two cross sections are U-shaped.

  In order to achieve the above object, the seismic reinforcement structure of an existing building according to the present invention is a floor in which a through hole for filling material is formed at a predetermined position around a column, and a predetermined region around the column is punched on the upper surface. A floor steel plate disposed in a rolled area and provided with a filler inlet corresponding to the filler injection through hole, and a predetermined interval in the vertical downward direction from the bottom surface of the floor corresponding to the floor steel plate An under-floor steel plate disposed at a distant position and an intermediate band disposed so as to surround the column with a predetermined gap in a position vertically spaced downward from a lower surface of a beam supporting the floor. And a reinforcing member for a beam arranged around the joint between the beam and the column, and an upper surface of another steel plate on the floor arranged at a lower surface of the upper surface of the floor one floor below the floor. The contacted position or lower surface is located in the area where the upper surface of the floor is one floor below the floor. A lower band disposed so as to surround the column with a predetermined gap at a predetermined distance from the upper surface of the other steel plate on the floor, and between the intermediate band and the lower column bunt. A column reinforcing member disposed so as to surround the column, the column, the beam, and the floor, the steel plate on the floor, the steel plate under the floor, the intermediate band, the reinforcing member for the beam, the column bottom The band and the column reinforcing member are bonded by a filler injected from the filler injection port. Further, the lower part of the beam reinforcing member is aligned with the upper surface of the intermediate band, the upper part is inserted into the gap between the underfloor steel plate and the beam, and the side end of the beam reinforcing member closer to the column You may make it provide the connection member for connecting between parts.

  In the seismic reinforcement structure, the column reinforcing member may include a corner member disposed at a corner portion of the column and a connecting plate member for connecting the corner members to each other. Or in the said earthquake-proof reinforcement structure, you may make it the said column reinforcement member have a plate member whose two cross sections are U-shaped.

  According to the seismic strengthening method and seismic strengthening structure of an existing building according to the present invention, the construction range of the reinforcement work does not reach a wide range, so the construction is simple.

It is a fragmentary perspective view of the frame of the existing building which is the reinforcement object of the earthquake-proof reinforcement method which concerns on 1st Embodiment of this invention. It is a top view which shows the 1st process of the earthquake-proof reinforcement method which concerns on 1st Embodiment of this invention. It is a top view which shows the 2nd process of the earthquake-proof reinforcement method which concerns on 1st Embodiment of this invention. It is a bottom view which shows the 2nd process of the earthquake-proof reinforcement method which concerns on 1st Embodiment of this invention. It is a front view which shows the 3rd process of the earthquake-proof reinforcement method which concerns on 1st Embodiment of this invention. It is a bottom view which shows the 3rd process of the earthquake-proof reinforcement method which concerns on 1st Embodiment of this invention. It is a perspective view which shows the 4th process of the seismic reinforcement method which concerns on 1st Embodiment of this invention. It is a front view which shows the 5th process of the earthquake-proof reinforcement method which concerns on 1st Embodiment of this invention. It is a top view which shows the 5th process of the earthquake-proof reinforcement method which concerns on 1st Embodiment of this invention. It is a bottom view which shows the 5th process of the earthquake-proof reinforcement method which concerns on 1st Embodiment of this invention. It is a front view which shows the 6th process of the seismic reinforcement method which concerns on 1st Embodiment of this invention. It is a front view which shows the 7th process of the earthquake-proof reinforcement method which concerns on 1st Embodiment of this invention. It is a bottom view which shows the 7th process of the earthquake-proof reinforcement method which concerns on 1st Embodiment of this invention. It is a fragmentary perspective view of the frame of the existing building which is the reinforcement object of the seismic reinforcement method which concerns on 2nd Embodiment of this invention. It is a partial bottom view of the frame of the existing building which is the reinforcement object of the seismic reinforcement method which concerns on 2nd Embodiment of this invention. It is a top view which shows the 1st process of the earthquake-proof reinforcement method which concerns on 2nd Embodiment of this invention. It is a top view which shows the 2nd process of the earthquake-proof reinforcement method which concerns on 2nd Embodiment of this invention. It is a bottom view which shows the 2nd process of the earthquake-proof reinforcement method which concerns on 2nd Embodiment of this invention. It is a front view which shows the 3rd process of the earthquake-proof reinforcement method which concerns on 2nd Embodiment of this invention. It is a bottom view which shows the 3rd process of the earthquake-proof reinforcement method which concerns on 2nd Embodiment of this invention. It is a perspective view which shows the 4th process of the earthquake-proof reinforcement method which concerns on 2nd Embodiment of this invention. It is a front view which shows the 5th process of the earthquake-proof reinforcement method which concerns on 2nd Embodiment of this invention. It is a top view which shows the 5th process of the earthquake-proof reinforcement method which concerns on 2nd Embodiment of this invention. It is a bottom view which shows the 5th process of the earthquake-proof reinforcement method which concerns on 2nd Embodiment of this invention. It is a front view which shows the 6th process of the earthquake-proof reinforcement method which concerns on 2nd Embodiment of this invention. It is a bottom view which shows the 6th process of the earthquake-proof reinforcement method which concerns on 2nd Embodiment of this invention.

  Embodiments of the present invention will be described below with reference to the drawings. In the drawings, the same parts are denoted by the same reference numerals.

<First Embodiment>
A first embodiment of the present invention will be described. FIG. 1 is a partial perspective view of a frame of an existing building which is a reinforcement target of the seismic reinforcement method according to the first embodiment of the present invention. The beam 2 is assembled in a cross shape at the joint between the column 1 and the beam 2, and the beam 2 supports the floor 3.

  First, as pretreatment, roughening is performed on the filler contact surfaces of the column 1 and the beam 2. However, if the bonding strength between the filler contact surfaces of the columns 1 and 2 and the filler injected in the eighth step described later can be obtained without performing the roughening, the roughening is not performed. May be.

  Next, in the first step, as shown in the top view of FIG. 2, a plurality of through-holes 4 and a plurality of filler-injecting through-holes 5 are formed in the floor 3 along the vertical direction, and beam reinforcement described later is performed. A hole corresponding to the through hole of the member 13 is formed in the beam 2. Thereafter, the portion 6 of the floor 3 where the steel plate on the floor is disposed is rolled, for example, by 30 mm so that the top surface of the floor 3 and the top surface of the steel plate on the floor are substantially flush with each other when the steel plate on the floor is disposed.

  Next, in the second step, as shown in the top view of FIG. 3A and the bottom view of FIG.

  The steel plate on the floor is constituted by four divided plates 7A to 7D, and each divided plate 7A to 7D is filled with a through hole corresponding to the through hole 4 of the floor 3 and a plurality of filler injection through holes 5 of the floor 3. A material inlet 8 is provided. The underfloor steel plate is composed of four divided plates 9A to 9D, and each of the divided plates 9A to 9D is provided with a through hole corresponding to the through hole 4 of the floor 3.

  The steel plate on the floor made of the divided plates 7A to 7D is in contact with the place 6 on the floor 3 where the steel plate on the floor is disposed, and the steel plate on the floor made of the divided plates 9A to 9D is spaced apart from the lower surface of the floor 3 by a predetermined distance in the vertical downward direction. In the state, it is supported by a steel bolt 10A and a nut 10B. In addition, in the hypotenuse OL of each of the divided plates 9A to 9D in FIG. 3B, folding is provided in the vertical upward direction by the predetermined interval (see FIG. 5).

  Next, in the third step, an intermediate band is disposed as shown in the front view of FIG. 4A and the bottom view of FIG. 4B.

  The intermediate band is constituted by U-shaped steel divided parts 11A and 11B. As shown in FIG. 4B, the divided parts 11A and 11B are engaged with each other at the engagement portion 12 so that the gap between the pillar 1 and the intermediate band is 20 to 30 mm, for example. Thus, by providing a gap between the pillar 1 and the intermediate band, it is possible to cope with the case where the pillar 1 is distorted. A screw hole is formed obliquely with respect to the thickness direction of the intermediate band in the meshing portion 12, and not only meshing by the shape of the meshing portion 12 but also screwing by bolts when the divided parts 11 </ b> A and 11 </ b> B are meshed. Is desirable. Thereafter, the intermediate band is temporarily placed in a state of being spaced apart from the lower surface of the beam 2 vertically downward by using a construction scaffold.

  Next, in the fourth step, as shown in the perspective view of FIG. 5, four steel beam reinforcing members 13, four steel upper corner angles 14 having an L-shaped cross section, and eight steel seam members are provided. 15 is arranged. Each beam reinforcing member 13 is provided with 18 through holes. The lower part of the beam reinforcing member 13 is aligned with the upper surface of the intermediate band, and the upper part of the beam reinforcing member 13 is inserted into the gap between the underfloor steel plate and the beam 2. Then, the upper corner angle 14 and the seam member 15 are arranged. A side end opposite to the column 1 side of the beam reinforcing member 13 is provided with a small mouth stopper and caulking. When the beam reinforcing member 13 is in place, the intermediate band is fixed to the column 1 by a steel anchor (not shown).

  Next, in the fifth step, as shown in the front view of FIG. 6A, the top view of FIG. 6B, and the bottom view of FIG.

  The underband band is constituted by U-shaped steel divided parts 16A and 16B. As shown in FIGS. 6B and 6C, the divided parts 16A and 16B are engaged with each other at the engagement portion 17 so that the gap between the pillar 1 and the band below the pillar is 20 to 30 mm, for example. . Thus, by providing a gap between the column 1 and the band under the column, it is possible to cope with the case where the column 1 is distorted. A screw hole is formed at an angle with respect to the thickness direction of the band under the pillar in the engagement portion 17 so that not only engagement by the shape of the engagement portion 17 but also screwing by bolts is performed when the divided parts 16A and 16B are engaged. It is desirable. Thereafter, the lower band of the pillar is fixed to the pillar 1 by the anchor with the lower surface of the lower band in contact with the upper surface of the upper steel plate (only the upper floor is shown, the lower floor is not shown). In addition, the lower surface of the lower pillar band is separated from the upper surface of the upper steel sheet (only the upper floor is shown, the lower floor is not shown) as long as the outer periphery of the lower surface of the lower pillar band can be welded to the upper floor steel sheet. May be.

  Next, in the sixth step, as shown in the front view of FIG. 7, four steel lower corner angles 18 having four L-shaped cross sections are arranged. The length of the lower corner angle 18 in the longitudinal direction is slightly longer than the distance between the lower surface of the intermediate band and the upper surface of the lower band band. The angle 18 is moved up and down so that the upper end of the lower corner angle 18 is placed in the gap between the column 1 and the intermediate band, and the lower end of the lower corner angle 18 is placed in the gap between the column 1 and the band below the column. Here, a reinforcing bar may be arranged in the gap between the lower corner angle 18 and the column 1 according to the required seismic strength.

  Next, in the seventh step, as shown in the front view of FIG. 8, four steel plates 19 are arranged on each surface of the pillar 1. Here, reinforcing bars may be arranged in the gap between the steel plate 19 and the column 1 according to the required seismic strength. And the outer periphery of the lower surface of the pillar lower band mentioned above and the floor steel plate of a lower floor are weld-joined, Then, as shown in the bottom view of FIG. 9, the beam reinforcement member 13 is made with steel bolt 20A and nut 20B. Fix to beam 2. In addition, in order to prevent the filler from leaking into a place other than the gap between the existing pillar 1, beam 2 and floor 3 and the above-mentioned reinforcing parts in the next eighth step, filling is performed as necessary. It is better to caulk where the material is likely to leak.

  In the final eighth step, a filler (for example, concrete) is poured from the filler inlet 8 and the gaps between the existing pillar 1, beam 2 and floor 3 and the above-mentioned reinforcing parts are completely filled with the filler. Then, the existing pillar 1, beam 2, and floor 3 are bonded to the above-described reinforcing components.

  The seismic reinforcement structure obtained by the above-described seismic reinforcement method is simple in construction because the construction range of the reinforcement work does not reach a wide range.

Second Embodiment
A second embodiment of the present invention will be described. FIG. 10A is a partial perspective view of a frame of an existing building that is a reinforcement target of the seismic reinforcement method according to the second embodiment of the present invention, and FIG. 10B is a diagram of the seismic reinforcement method according to the second embodiment of the present invention. It is a partial bottom view of the frame of the existing building which is a reinforcement object. The beam 2 is assembled in a cross shape at the joint between the column 1 and the beam 2, and the beam 2 supports the floor 3. In this embodiment, the width of one beam is narrower than the other beams.

  First, as pretreatment, roughening is performed on the filler contact surfaces of the column 1 and the beam 2. However, if the bonding strength between the filler contact surfaces of the pillars 1 and 2 and the filler injected in the seventh step described later can be obtained without performing the roughening, the roughening is not performed. May be.

  Next, in the first step, as shown in the top view of FIG. 11, a plurality of through-holes 4 and a plurality of filler-injecting through-holes 5 are formed in the floor 3 along the vertical direction, and beam reinforcement described later is performed. A hole corresponding to the through hole of the member 13 is formed in the beam 2. Thereafter, the portion 6 of the floor 3 where the steel plate on the floor is disposed is rolled, for example, by 30 mm so that the top surface of the floor 3 and the top surface of the steel plate on the floor are substantially flush with each other when the steel plate on the floor is disposed.

  Next, in the second step, as shown in the top view of FIG. 12A and the bottom view of FIG.

  The steel plate on the floor is constituted by four divided plates 7A to 7D, and each divided plate 7A to 7D is filled with a through hole corresponding to the through hole 4 of the floor 3 and a plurality of filler injection through holes 5 of the floor 3. A material inlet 8 is provided. The underfloor steel plate is composed of four divided plates 9A to 9D, and each of the divided plates 9A to 9D is provided with a through hole corresponding to the through hole 4 of the floor 3. Note that the divided plate 9B has a different shape from the divided plates 9A, 9C, and 9D in order to cope with the fact that one beam has a narrower horizontal width than the other beams.

  The steel plate on the floor made of the divided plates 7A to 7D is in contact with the place 6 on the floor 3 where the steel plate on the floor is disposed, and the steel plate on the floor made of the divided plates 9A to 9D is spaced apart from the lower surface of the floor 3 by a predetermined distance in the vertical downward direction. In the state, it is supported by a steel bolt 10A and a nut 10B. In addition, in the hypotenuse OL of each of the divided plates 9A to 9D in FIG. 12B, folding is provided in the vertical upward direction by the predetermined interval (see FIG. 14).

  Next, in the third step, an intermediate band is disposed as shown in the front view of FIG. 13A and the bottom view of FIG. 13B.

  The intermediate band is constituted by U-shaped steel divided parts 11A and 11B. As shown in FIG. 13B, the divided parts 11A and 11B are assembled with each other so that the gap between the column 1 and the intermediate band is 20 to 30 mm, for example, and assembled into a square shape. Thus, by providing a gap between the pillar 1 and the intermediate band, it is possible to cope with the case where the pillar 1 is distorted. A screw hole is formed obliquely with respect to the thickness direction of the intermediate band in the meshing portion 12, and not only meshing by the shape of the meshing portion 12 but also screwing by bolts when the divided parts 11 </ b> A and 11 </ b> B are meshed. Is desirable. Thereafter, the intermediate band is temporarily placed in a state of being spaced apart from the lower surface of the beam 2 vertically downward by using a construction scaffold.

  Next, in the fourth step, as shown in the perspective view of FIG. 14, four steel beam reinforcing members 13, four steel upper corner angles 14 having an L-shaped cross section, and eight steel joint members 15 is arranged. Each beam reinforcing member 13 is provided with 18 through holes. Further, in order to cope with the fact that one beam has a narrower horizontal width than the other beams, one of the four beam reinforcing members 13 has a shape different from the other, One of the upper corner angles 14 has a different shape from the others. The lower part of the beam reinforcing member 13 is aligned with the upper surface of the intermediate band, and the upper part of the beam reinforcing member 13 is inserted into the gap between the underfloor steel plate and the beam 2. Then, the upper corner angle 14 and the seam member 15 are arranged. A side end opposite to the column 1 side of the beam reinforcing member 13 is provided with a small mouth stopper and caulking. When the beam reinforcing member 13 is in place, the intermediate band is fixed to the column 1 by a steel anchor (not shown).

  Next, in the fifth step, as shown in the front view of FIG. 15A, the top view of FIG. 15B, and the bottom view of FIG.

  The underband band is constituted by U-shaped steel divided parts 16A and 16B. As shown in FIGS. 15B and 15C, the divided parts 16A and 16B are engaged with each other at the engaging portion 17 so that the gap between the pillar 1 and the band below the pillar is 20 to 30 mm, for example. . Thus, by providing a gap between the column 1 and the band under the column, it is possible to cope with the case where the column 1 is distorted. A screw hole is formed at an angle with respect to the thickness direction of the band under the pillar in the engagement portion 17 so that not only engagement by the shape of the engagement portion 17 but also screwing by bolts is performed when the divided parts 16A and 16B are engaged. It is desirable. Thereafter, the lower band of the pillar is fixed to the pillar 1 by the anchor with the lower surface of the lower band in contact with the upper surface of the upper steel plate (only the upper floor is shown, the lower floor is not shown). In addition, the lower surface of the lower pillar band is separated from the upper surface of the upper steel sheet (only the upper floor is shown, the lower floor is not shown) as long as the outer periphery of the lower surface of the lower pillar band can be welded to the upper floor steel sheet. May be.

  Next, in the sixth step, as shown in the front view of FIG. 16, steel plates 19A and 19B having two U-shaped cross sections are arranged. The length in the longitudinal direction of the steel plates 19A and 19B is slightly longer than the distance between the lower surface of the intermediate band and the upper surface of the lower column band, and the steel plate 19A is utilized by utilizing the gap between the column 1, the intermediate band and the lower column band. And 19B are moved up and down, and the upper end portions of the steel plates 19A and 19B are stored in the gap between the column 1 and the intermediate band, and the lower end portions of the steel plates 19A and 19B are stored in the gap between the column 1 and the band below the column. Here, reinforcing bars may be arranged in the gaps between the steel plates 19A and 19B and the column 1 according to the required seismic strength. And the contact part of 19 A of steel plates and the steel plate 19 is weld-joined. Furthermore, the outer periphery of the lower surface of the pillar lower band described above and the floor steel plate on the lower floor are welded together, and then, as shown in the bottom view of FIG. 17, the beam reinforcing member 13 is attached by a steel bolt 20A and nut 20B. Fix to beam 2. In addition, in order to prevent the filler from leaking out to places other than the gaps between the existing pillar 1, beam 2 and floor 3 and the above-described reinforcing parts in the next seventh step, filling is performed as necessary. It is better to caulk where the material is likely to leak.

  In the final seventh step, a filler (for example, concrete) is poured from the filler inlet 8 to completely fill the gaps between the existing pillar 1, beam 2 and floor 3 and the above-mentioned reinforcing components with the filler. Then, the existing pillar 1, beam 2, and floor 3 are bonded to the above-described reinforcing components.

  The seismic reinforcement structure obtained by the above-described seismic reinforcement method is simple in construction because the construction range of the reinforcement work does not reach a wide range.

<Others>
In the above-described embodiment, the beam is assembled in a cross shape at the joint between the column and the beam. However, even if the beam is assembled in a T shape or an L shape, the number of beam reinforcing members or the like is adjusted. It is possible to cope with.

  In the above-described embodiment, the cross-sectional shape of the column is rectangular. However, when the cross-sectional shape of the column is not rectangular, this can be dealt with by replacing the upper corner angle and the lower corner angle with hinges.

  Further, if the shape of the beam reinforcing member is such that there is no gap between the side end portions of the beam reinforcing member close to the column 1, the space between the side end portions of the beam reinforcing member close to the column 1 is between There is no need to provide a connecting member for connection.

  Moreover, you may provide another band which surrounds the pillar 1 in the state which opened the predetermined gap between the intermediate | middle band and the band under a pillar.

  Further, when the shape of the beam reinforcing member 13 is such that there is no gap between the side end portions of the beam reinforcing members 13 on the side close to the column 1, the upper corner angle 14 and the seam member which are connecting members 15 can be omitted.

DESCRIPTION OF SYMBOLS 1 Pillar 2 Beam 3 Floor 4 Through-hole 5 Filler injection | pouring through-hole 6 The place where a floor top steel plate is arrange | positioned 7A-7D Split plate which comprises a floor steel plate 8 Filler inlet 9A-9D Split plate 10A which comprises a bottom steel plate Bolt 10B Nut 11A, 11B Divided parts constituting intermediate band 12 Interlocking portion of intermediate band 13 Beam reinforcing member 14 Upper corner angle (example of connecting member)
15 Seam member (example of connecting member)
16A, 16B Divided parts composing the under-column band 17 Interlocking portion of under-column band 18 Lower corner angle (example of column reinforcing member)
19, 19A, 19B Steel plate (example of column reinforcing member)
20A bolt 20B nut

Claims (8)

A through hole for filling the filler is formed at a predetermined position around the pillar of the floor, a predetermined region around the pillar on the upper surface of the floor is provided, and a filler inlet corresponding to the through hole for filling the filler is provided. Placing the steel sheet on the floor in the area where the upper surface of the floor is rolled,
A step of disposing an underfloor steel plate corresponding to the above-mentioned underfloor steel plate at a position spaced apart from the lower surface of the floor in a vertical downward direction; and
Arranging an intermediate band that surrounds the pillar in a state where a predetermined gap is left in a position vertically spaced from the lower surface of the beam supporting the floor; and
Arranging a beam reinforcing member around the joint between the beam and the column;
A position in which the lower surface of the underarm band is in contact with the upper surface of another steel plate on the floor located in the region where the upper surface of the floor one floor below the floor is located or the lower surface of the underband band is a floor one floor below the floor A step of disposing the under-column band that surrounds the column in a state where a predetermined gap is left at a position spaced apart from the upper surface of the other steel plate on the floor disposed in the region where the upper surface is rolled;
Disposing a column reinforcing member surrounding the column between the intermediate band and the under-column bunt;
A method for seismic reinforcement of an existing building, comprising a step of injecting a filler from the filler inlet after the arrangement is completed. In the step of disposing the beam reinforcing member around the joint between the beam and the column, the lower portion of the beam reinforcing member is aligned with the upper surface of the intermediate band, and the upper portion of the beam reinforcing member is the underfloor steel plate. Insert into the gap with the beam,
Furthermore, the earthquake-proof reinforcement method of the existing building of Claim 1 provided with the process of arrange | positioning the connection member for connecting between the side surface edge parts by the side of the said beam reinforcement members near the said pillar.   The seismic resistance of the existing building according to claim 1 or 2, wherein the column reinforcing member includes a corner member disposed at a corner portion of the column and a connecting plate member for connecting the corner members to each other. Reinforcement method.   The seismic reinforcement method for an existing building according to claim 1 or 2, wherein the column reinforcing member has a plate member having two U-shaped cross sections. Filler injection through-holes are formed at predetermined positions around the pillars, and the fillers are disposed in the area where the predetermined area around the pillars on the upper surface is rolled up and correspond to the through-holes for injection of fillers. A steel plate on the floor provided with an inlet,
Corresponding to the above-mentioned steel plate on the floor, under-floor steel plate arranged at a position spaced apart from the lower surface of the floor in the vertical downward direction,
An intermediate band disposed so as to surround the column with a predetermined gap at a position spaced apart from the lower surface of the beam supporting the floor in a vertical downward direction;
A reinforcing member for a beam disposed around the joint between the beam and the column;
A position where the lower surface is in contact with the upper surface of another floor steel plate arranged in a region where the upper surface of the floor one floor below the floor is in contact with or a region where the lower surface is in an area where the upper surface of the floor one floor below the floor is in contact A band below the pillar arranged so as to surround the pillar with a predetermined gap at a position spaced apart from the upper surface of the other steel sheet on the floor,
Between the intermediate band and the under-column bunt, comprising a column reinforcing member disposed so as to surround the column,
The column, the beam, and the floor, the steel plate on the floor, the steel plate under the floor, the intermediate band, the beam reinforcing member, the column lower band, and the column reinforcing member are injected from the filler inlet. A seismic reinforcement structure for existing buildings, which is bonded by a filler. The lower portion of the beam reinforcing member is aligned with the upper surface of the intermediate band, and the upper portion is inserted into the gap between the underfloor steel plate and the beam,
Furthermore, the earthquake-proof reinforcement structure of the existing building of Claim 5 provided with the connection member for connecting between the side surface edge parts by the side of the said beam reinforcement members near the said pillar.   The seismic resistance of the existing building according to claim 5 or 6, wherein the column reinforcing member has a corner member disposed at a corner portion of the column and a connecting plate member for connecting the corner members to each other. Reinforced structure.   The seismic reinforcing structure for an existing building according to claim 5 or 6, wherein the column reinforcing member has a plate member having two U-shaped cross sections.

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