JPH09228656A - Combination block and method for reinforcing concrete structure using the same - Google Patents

Abstract

(57) [Abstract] [Problem] By installing a combination block within a frame structure that requires reinforcement, the structure of a concrete structure capable of simplifying the work and shortening the construction period and having sufficient horizontal proof strength. Providing reinforcement methods. SOLUTION: A combination block 6 having a triangular shape of precast concrete is installed at four corners of a frame 5 with its facing surface 6b in contact with a beam member 3 and its rising surface 8 in contact with a column member 2 and each through hole. 9 Anchor bolt 7 inside
Is fastened to the beam member 3, and the combination block 6 of the same shape is fitted and fixed in a wedge shape between the slopes inside the slopes 6a of the combination blocks 6 facing each other. Further, a rectangular parallelepiped-shaped support block 11 is fixedly provided between the facing surfaces 6b of the installed combination block 6 facing each other in the horizontal direction so as to extend along the upper and lower beam members 3. Then, the fillers 13 and 14 are filled in the gaps caused by construction errors and the like.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention particularly relates to a method for reinforcing a concrete structure frame structure for reinforcing a column beam structure in an existing reinforced concrete (RC) structure to improve seismic performance.

[0002]

2. Description of the Related Art Conventionally, by reviewing the seismic strength based on the experience of damage such as a great earthquake, it is possible to improve the seismic performance of existing concrete structures, especially by adding or newly adding walls to replenish the amount of walls. It is considered to be effective in doing so. Specifically, anchor bars are installed on the columns and beam members around the frame that require reinforcement, and reinforcement is done, and formwork is installed and concrete is placed. Alternatively, by installing a precast concrete panel of a size that fits the frame and joining it to the pillar and beam members, the horizontal strength, which is equivalent to that of the earthquake resistant wall, is increased.

[0003]

SUMMARY OF THE INVENTION However,
Among the conventional methods of reinforcing concrete structures, in the method of placing concrete, the work is significantly lengthened by the arrangement of anchor bars, bar arrangement, formwork assembly, concrete placement and concrete curing, Especially when applied to an existing building in use, there was a problem that a major obstacle occurred. In addition, in the method of installing precast concrete panels, it is necessary to individually prepare precast concrete panels that match the span and floor height dimensions of the pillar / beam members, and accurately join them to the pillar / beam members. There is a problem that the production of the concrete panel becomes complicated and it takes time and effort to perform on-site alignment and fine adjustment, resulting in extremely low work efficiency.

Therefore, the present invention has been made by paying attention to the above-mentioned unsolved problems of the related art. By using standardized combination blocks, the blocks are combined and installed in a frame requiring reinforcement. It is an object of the present invention to provide a method for reinforcing a frame structure of a concrete structure, which simplifies the work, shortens the construction period, and has sufficient horizontal strength.

[0005]

In order to solve the above-mentioned problems, a combination block according to the present invention has a two-diagonal surface that is at a right angle and faces the two-diagonal surface at an inner angle of 45 degrees. It is characterized by having a cross-sectional shape surrounded by one facing surface and a rising surface that rises vertically at least at one end of the facing surface.

[0006] If a plurality of combination blocks made of standard products of the same shape are appropriately combined and arranged in the frame surface requiring reinforcement, the installation place is not determined by different floor heights and spans, and it can be used on any frame surface. Can respond. The rising surface may be provided at both ends of the facing surface. Further, when the hollow portion is provided inside the cross section, the combined block can be made lighter and the transportation and mounting work can be simplified.

On the other hand, when a through hole penetrating the combination block in the direction perpendicular to the facing surface is provided, the combination block and the pillar and beam members around the frame surface can be easily joined and integrated by using anchor bolts or the like. Can be converted. Further, the combination block may be made of precast concrete, and it is possible to provide a sufficient compressive strength equivalent to an earthquake resistant wall by making the work dry without performing concrete pouring or concrete curing on site.

A method for reinforcing a frame structure of a concrete structure using the combination block of the present invention is a method of reinforcing a plurality of the combination blocks in a frame structure surface surrounded by a column member and a beam member of the concrete structure, the opposing surfaces of the combination blocks. And the rising surface is fixed to the four corners of the frame surface by abutting, and the combination block is fixed between adjacent inner slopes of the combination blocks fixed to the adjacent corners, and the slope is wedge-shaped to be fixed. In addition, the opposing faces of the combination block are fixed to each other with a support block interposed.

Thus, a plurality of standardized combination blocks and support blocks are combined and installed integrally with the column / beam members, so that a plurality of combination blocks are not formed corresponding to the frame shape, but a plurality of combination blocks are not formed. It is applied to frame surfaces with different dimensions, eliminating the need for alignment and dimensional adjustment. Also,
The combined combination block and support block are
By arranging the beam-column joints that face each other in an oblique direction so that they connect to each other, the shearing force generated between the upper floor and the lower floor is directly transmitted to suppress interlayer displacement and improve horizontal yield strength. can do.

Further, the combination block is composed of two right-angled sloped surfaces, one facing surface facing each other at 45 degrees and a rising surface, so that the column-beam joints at the four corners of the frame surface needing reinforcement. When the facing surface and the rising surface are arranged so as to be in contact with each other, the angle formed by the oblique sides facing vertically or horizontally becomes a right angle, and a combination block fitted in a wedge shape can be installed between the inclined surfaces without a gap.

Further, a plurality of the combination blocks are fixedly mounted in a frame structure surface surrounded by the pillar members and beam members of the concrete structure, with their facing surfaces and rising surfaces abutting the four corners in the frame structure surface. , The combination block is fixed between adjacent inner slopes of the combination block fixed to the adjacent corners, the slopes are fixed in a wedge shape, and the opposite faces of the combination block are fixed to each other. There is a case.

Thus, for example, for a frame surface having a relatively small span or floor height, the filler is filled in the gaps between the support blocks without fixing the combination blocks facing each other with the support blocks interposed. You can also do it. Further, by filling the gap between the fixed combination blocks, a construction error generated between the installed combination blocks or the support blocks is compensated to bear a compressive force, and a shift or the like of each combination block is prevented.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a method for reinforcing a frame of a combined block and a concrete structure according to the present invention will be described below with reference to the drawings. In FIG. 1, 1 is a structure, which is made of reinforced concrete. In order to improve the seismic performance of the structure 1, here, the frame surface 5 surrounded by the column members 2 and the beam members 3 is appropriately made within the frame surface by a plurality of combination blocks 6 made of precast concrete and having the same shape. It is reinforced by combining them.

First, as shown in FIG. 2, the combination block 6 used here has a right-angled bi-sloping surface 6a and one facing surface that makes an angle of 45 degrees with the bi-sloping surface on the inner angle side of the bi-sloping surface 6a. It has a shape surrounded by a surface 6b and a rising surface 8 that rises vertically at least at one end of the facing surface 6b, and a hollow portion 7 of the same shape is formed in the center thereof, and both ends of the facing surface 6b are Rising surface 8 perpendicular to facing surface 6b
Are formed. Further, through holes 9 for attaching anchor bolts are formed at three locations in the center of the facing surface 6b.

The combination block 6 has a specific gravity of about 2.0 and is made of high-strength lightweight concrete. In addition, its specific size is 300
It is about mm (diameter) × 200 mm (thickness), and the axial compressive strength of each surface is set to about 90 tf. Then, as shown in FIG. 1, the construction procedure of the method for reinforcing the frame of the concrete structure is as follows.
Is abutted on the beam member 3 and the rising surface 8 is abutted on the pillar member 2 to be installed at the four corners of the frame surface 5, and the anchor bolt 7 is inserted into each through hole 9 and fastened to the beam member 3.

At this time, the combination block 6 is provided at the upper corner.
When the fixed block is fixedly installed, the combined block 6 is fastened by the anchor bolts 7 while the combined block 6 is supported at the corner using a hand lift or the like (not shown). Next, the binding block 10 is fitted in a wedge shape by using the above-mentioned hand lift or the like to fit and support the combination block 6 having the same shape between the slopes inside the slopes 6a of the combination blocks 6 that are installed vertically. Between the slopes 6a, 6a butted by
Here, it is fixed by fastening at two points.

At this time, the angle formed by the slopes 6a, 6a facing each other is 90 °, which coincides with the apex angle of the combination block 6, so that the slopes 6a of the combination block 6 can be brought into contact with each other without a gap. Further, a rectangular parallelepiped-shaped support block 11 is interposed between the facing surfaces 6b of the installed combination block 6 which are opposed to each other in the horizontal direction so as to be installed along the upper and lower beam members 3 and integrated.

The support block 11 is made of rectangular parallelepiped precast concrete having the same wall thickness as that of the combination block 6, and the distance L in the lengthwise direction is a dimension preset by the span. Further, through holes 12 are provided at four locations in the width direction of the support block 11, and anchor bolts 7 are inserted through the through holes 12 to fasten the support block 11 and the beam member 3.

The support block 1 installed between the facing surfaces 6b of the combination blocks 6 due to construction errors or the like.
The filler 13 is filled in the gaps formed between the combined block 6 and the beam members 3 and the support blocks 11. Mortar is used for the filler 13 here. Further, the filling material 14 is filled also in the gaps formed on the contact surfaces between the four corners of the frame surface 5 and the combination block 6 and the contact surfaces between the combination block 6 and the combination block 6.

An epoxy resin is used for the filler 14. The fillers 13 and 14 are not necessarily limited to this, and any filler other than this can be applied. Further, the construction procedure shown in the above embodiment is not necessarily limited to this, and it is needless to say that the construction can be appropriately changed in construction.

When an earthquake occurs in the structure reinforced in this way, as shown in FIG. 3, the shearing force generated in the column-beam joint A on the upper floor is applied to the facing surface 6b and the slope of the combination block 6. 6a is distributed and transmitted to the support block 11 as a horizontal force by the combination block 6 and further transmitted to the combination block 6 as an oblique force by the combination block 6 and then in an oblique direction of the frame surface 5. Can be transmitted to the column-beam joint B facing each other (in the direction of the arrow in the figure).

Thus, by the combination block 6,
In particular, by performing interlaminar shear reinforcement of the column-beam frame structure, the horizontal bearing capacity of the column-beam frame structure can be improved and the interlayer displacement can be suppressed, whereby the seismic performance can be significantly improved. Further, by reducing the weight of the combination block 6 to be used and appropriately arranging the combination blocks 6 having the same shape, it is possible to greatly simplify the work of manufacturing and carrying the members.

If the combination blocks 6 made of standard products of the same shape are moved horizontally so as to abut between the slopes 6a without setting the individual combination blocks 6 to the size corresponding to the frame, a wide range can be obtained. It is possible to adjust the floor height, and it is possible to eliminate the need for alignment and fine adjustment in the field without causing a dimensional error between the pillar member 2 and the beam member 3 and the combination block 6.

[0024] Furthermore, most of the dry construction method is for transporting and mounting work without performing concrete pouring work or curing, and even when working in a building in use, it is possible to work only on holidays. Can be completed and the use of the building is prevented from being impaired. The arrangement of the combination block 6 and the support block 11 in the above embodiment is not limited to this, and as shown in FIG. 4, when the span is shorter than the floor height, the combination block 6 and the support block 11 are arranged. The installation direction of 11 may be reversed in the vertical and horizontal directions.

A combination block 6 fixed in a wedge shape.
When the distance between the facing surfaces 6b and 6b of is extremely short, etc.,
It is also possible to directly fill mortar or the like without using the support block 11. Further, the material used for the combination block 6 and the support block 11 is not necessarily made of lightweight concrete, but can be made of any material such as ordinary concrete, heavy concrete, and steel material.

In the above embodiment, the case where the combination block is applied to the reinforced concrete structure has been described, but the present invention is not limited to this, and the frame surface of any concrete structure such as a steel reinforced concrete (SRC) structure. Of course, it can be applied to.

[0027]

As described above, according to the combination block of the present invention and the method for reinforcing a concrete structure using the combination block, the combination is performed in the frame surface surrounded by the pillar members and beam members of the concrete structure. Block
Abutment is fixed to the four corners in the frame surface, the combination block is fixed between adjacent inner slopes of the combination blocks fixed to the adjacent corners, and the slopes are fixed in a wedge shape. By combining and arranging support blocks between the facing surfaces of the combination blocks that face each other in an appropriate combination, the support blocks can be applied to a wide range of frame surfaces with different floor heights and spans and can be combined. The block transportation or installation work is simplified and the construction period is greatly shortened.

Further, if the reinforcing blocks are appropriately combined and installed inside the frame surface, the rigidity strength of the structure is improved by transmitting the stress between the column-beam member joints facing each other in the diagonal direction in the frame structure. To do. Furthermore, it is possible to easily improve the seismic performance of an existing concrete structure without performing a wet construction method such as complicated concrete placing and curing.

[Brief description of drawings]

FIG. 1 is a side view showing a structure applied to a concrete structure frame reinforcing method according to an embodiment of the present invention.

2A and 2B are diagrams showing a combination block according to the embodiment of the present invention, in which FIG. 2A is a plan view and FIG. 2B is a side sectional view.

FIG. 3 is a side view showing the operation of the method for reinforcing the frame of a concrete structure according to another embodiment of the present invention.

FIG. 4 is a side sectional view showing a modified example of a beam member joining method in a fiber sheet reinforcing method for a concrete member according to another embodiment of the present invention.

[Explanation of symbols]

 1 ... Structure 2 ... Column member 3 ... Beam member 5 ... Frame surface 6 ... Combination block 7 ... Anchor bolt 8 ... Rise surface 9 ... Through hole 10 ... Tightening band 11 ... Support block 12 ... Through hole 13 ... Filling material 14 ... Filling material

Claims (7)

[Claims] 1. A right-angled bi-slope, and one opposing surface facing the bi-slope at an angle of 45 degrees on the inner angle side of the bi-slope.
A combination block having a shape surrounded by a rising surface that rises vertically at least at one end of the facing surface. 2. The combination block according to claim 1, wherein a hollow portion is provided inside the cross section of the combination block. 3. The combination block according to claim 1, further comprising a through hole penetrating the combination block in a direction perpendicular to the facing surface. 4. The combination block according to claim 1, wherein the combination block is made of precast concrete. 5. A method of reinforcing a frame structure of a concrete structure using the combination block according to claim 1, wherein a plurality of the combination blocks are provided in a frame surface surrounded by a pillar member and a beam member of the concrete structure. The facing surface and the rising surface are abutted and fixed to the four corners in the frame surface, and the combination block is formed between the facing inner slopes of the combination blocks fixed to the adjacent corners, and the slope is formed into a wedge shape. A method for reinforcing a frame structure of a concrete structure, characterized in that the concrete blocks are fixed and fixed, and further, the facing surfaces of the combination block are fixed to each other with a support block interposed. 6. A method of reinforcing a frame structure of a concrete structure using the combination block according to claim 1, wherein a plurality of the combination blocks are provided in a frame surface surrounded by a pillar member and a beam member of the concrete structure, The facing surface and the rising surface are abutted and fixed to the four corners in the frame surface, and the combination block is formed between the facing inner slopes of the combination blocks fixed to the adjacent corners, and the slope is formed into a wedge shape. A method for reinforcing a frame structure of a concrete structure, characterized in that the concrete blocks are fitted and fixed, and further the facing surfaces of the combination block facing each other are fixed. 7. The method for reinforcing a concrete structure according to claim 5, wherein the gap between the fixed combination blocks is filled.