JP3776330B2 - Seismic walls of existing buildings and construction methods - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a seismic wall of an existing building and a construction method thereof.
[0002]
[Prior art]
In recent years, many buildings have been damaged by earthquakes that frequently occur, and some buildings can be destroyed by earthquakes, so new buildings have been designed with consideration for earthquake resistance. On the other hand, since many existing buildings are inferior in earthquake resistance, they are currently retrofitted with earthquake resistance. FIG. 6 shows an example of the seismic wall 28, and a reinforcing frame 30 is fixed to the outer wall surface 29 from the outside by a post-construction anchor 31 not from the inside of the building so as not to disturb daily work and life.
[0003]
[Problems to be solved by the invention]
However, the above-mentioned seismic wall has a reinforcing frame fixed by external work, but the work of hanging the finished surface and the noise and vibration during construction of post-installed anchors are intense, and daily work and life are done as usual. It was difficult.
[0004]
The present invention has been made in view of these problems, and an object of the present invention is to provide a seismic wall for an existing building that can be seismically strengthened without interfering with daily work or life in the existing building, and a method for constructing the same. It is.
[0005]
[Means for Solving the Problems]
The earthquake-resistant wall of the existing building of the present invention for solving the above problems is provided with an appropriate interval so that the joining plate of the one end protrudes the connecting cotter of the tubular body to the column surface and the beam surface of the outer wall in the existing building , The connecting plate is joined to a steel frame reinforcing frame attached to the column surface and the beam surface, and mortar is filled between the reinforcing frame joining surface and the column surface and the beam surface. In addition, the connection cotter on the beam surface includes that the lower end is located inside the stirrup.
In addition, the method of constructing the seismic wall of the existing building is to provide pipe connection cotters on the column surface and beam surface of the outer wall in the existing building with an appropriate interval so that the joining plate at one end protrudes, and the connection plate is connected to the column surface. The steel frame is bonded to a reinforcing frame made of steel frame attached to the beam surface, and mortar is filled between the bonding surface of the reinforcing frame and the column surface and the beam surface .
[0006]
The connection cotter has a large shear resistance, and the reinforcing frame is firmly bonded to the column surface and the beam surface. The reinforcing frame can be joined to the column and the beam surface without generating noise, vibration, dust and the like. The reinforcing frame can be joined to the column surface and the beam surface without interfering with daily work and life in the existing building. Since the reinforcing frame can be joined while leaving the finished surface in the existing building, the generation of industrial waste can be suppressed.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a seismic wall of an existing building and a construction method thereof according to the present invention will be described in detail with reference to the drawings. First, an embodiment of a seismic wall of an existing building will be described, and then an embodiment of a method for constructing the seismic wall will be described. In each embodiment, the same components are described with the same reference numerals, and different configurations Only different reference numerals are used for explanation.
[0008]
1 and 2 show a seismic wall 1 of an existing building according to the first embodiment. The seismic wall 1 is configured by attaching a reinforcing frame 5 to a column surface 3 and a beam surface 4 of an outer wall surface having an opening 2 by a connection cotter 6. The reinforcing frame 5 is composed of a vertical member 7, a horizontal member 8 and a brace 9, which are formed of a steel frame 10 and a reinforced concrete 11 covering the periphery thereof, and an end 8 a of the horizontal member and an end 9 a of the brace are formed. It is covered with mortar (or cast-in-place concrete) 12. The mortar (or cast-in-place concrete) 12 is also filled in the concave portion 13 on the joining surface side of the vertical member 7 and the horizontal member 8 and bonded to the column surface 3 and the beam surface 4. On the other hand, the connection cotter 6 is made of steel pipe, and the tip end side is inserted into the through hole 14 of the vertical member 7 and the horizontal member 8, and the rear end side is inserted into the insertion groove 15 of the column surface 3 and the beam surface 4 with an adhesive 16. It is joined. Further, the rear end side of the connection cotter 6 is in contact with the band 3a at the column, but is located inside the rib 4a at the beam. The connection cotter 6 can also be formed of a precast concrete column.
[0009]
3 and 4 show the earthquake resistant wall 17 of the existing building of the second embodiment. This seismic wall 17 has a steel frame reinforcing frame 18 bolted to the connection cotter 6 and has the same configuration as that of the seismic wall 17 except for this. The connecting cotter 6 is provided with a joining plate 19 on the upper surface, and the joining plate 19 is joined to the reinforcing frame 18 with bolts 20. The joining surface side of the reinforcing frame 18 is filled with mortar (or in-situ concrete) 12 and bonded to the column surface 3 and the beam surface 4.
[0010]
FIG. 5 shows a seismic wall 21 of an existing building according to the third embodiment. A reinforcing frame 25 in which a main bar 23 and a hoop bar 24 are arranged on a web 22 is a connecting cotter 6 and a beam surface 4 and It is configured to be attached to the column surface 3. The reinforcing frame 25 is attached so that the flange 26 is perpendicular to the column surface 3 or the beam surface 4. A part of the connection cotter 6 protruding from the column surface 3 or the beam surface 4 is formed by the flange 26 and the web 22. Arranged in an enclosed recess 27, the recess 27 is filled with mortar (or in-situ concrete) 12.
[0011]
Next, the construction method of the earthquake-resistant wall 1 of 1st Embodiment is demonstrated based on FIG. First, the reinforcing frame 5 in which the through hole 14 for inserting the connection cotter is provided in advance is manufactured on site or in a factory. Next, the insertion groove 15 of the connection cotter is opened at appropriate intervals on the column surface 3 and the beam surface 4 with a core drill. become. Next, the reinforcing frame 5 is lifted by a crane, and the connection cotter 6 is inserted into the through hole 14 to be temporarily joined. Then, a mold (not shown) is assembled and formed at the intersection of both ends 8a of the horizontal member and both ends 9a of the brace. The mortar 12 is filled from the through hole 14. And after this mortar 12 hardens | cures, if the said formwork is disassembled, the earthquake-resistant wall 1 as shown in FIG. 1 will be constructed | assembled. The seismic walls 17 and 21 of the second and third embodiments are also constructed in substantially the same manner as described above.
[0012]
【The invention's effect】
The connection cotter has a large shear resistance, and the reinforcing frame can be firmly joined to the column surface and the beam surface.
[0013]
The reinforcing frame can be joined to the column surface and the beam surface without generating noise, vibration, dust or the like.
[0014]
Reinforcement frames can be joined to columns and beam surfaces without interfering with daily work and life in existing buildings.
[0015]
Since the reinforcing frame can be joined while leaving the finished surface in the existing building (the work of hanging the finished surface is eliminated), the generation of industrial waste can be suppressed.
[Brief description of the drawings]
FIG. 1 is a front view of a seismic wall according to a first embodiment.
2 is a cross-sectional view taken along line AA of FIG. 1, FIG. 2 is an enlarged cross-sectional view of (1), and FIG. 2 is a cross-sectional view taken along line BB of FIG.
FIG. 3 is a front view of a seismic wall according to a second embodiment.
4 is a cross-sectional view taken along line CC in FIG. 3, and FIG. 4 is a cross-sectional view taken along line DD in FIG.
FIG. 5 is a cross-sectional view of a seismic wall according to a third embodiment.
FIG. 6 is a cross-sectional view of a conventional earthquake resistant wall.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1, 17, 21, 28 Earthquake-resistant wall 2 Opening part 3 Column surface 4 Beam surface 5 , 18 , 2, 5 , 30 Reinforcement frame 6 Connection cotter 7 Vertical material 8 Horizontal material 9 Brace 10 Steel frame 11 Reinforced concrete 12 Mortar 13, 27 Recessed part 14 Through hole 15 Insertion groove 16 Adhesive 19 Bonding plate 20 Bolt 22 Web 23 Main bar 24 Hoop bar 26 Flange 29 Outer wall 31 Post-installed anchor

Claims (3)

A steel connection frame is attached to the column surface and beam surface of the outer wall of an existing building with appropriate intervals so that the joint plate at one end protrudes, and the connection plate is attached to the steel frame reinforcement frame attached to the column surface and beam surface. A seismic wall of an existing building, which is joined and mortar is filled between a joint surface of the reinforcing frame and a column surface and a beam surface . The seismic wall of an existing building according to claim 1, wherein the connecting cotter on the beam surface has a lower end located inside the stirrup . A steel frame reinforced frame in which pipe connection cotters are provided at appropriate intervals on the column and beam surfaces of the outer wall of an existing building so that the joint plate at one end protrudes, and the connection plate is attached to the column and beam surfaces. And a mortar is filled between the joint surface of the reinforcing frame, the column surface, and the beam surface .

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