JPH09287298A - Aseismatic performance reinforcing method for building and aseismatic block - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the on-site work, shorten the construction period, allow an air current and light to pass through a plane of structure surrounded by columns and beams, and increase the aseismatic property. SOLUTION: Many aseismatic blocks 3 each having a quadrilateral with the prescribed thickness and formed with junctions 4 at four comers are prepared, and many aseismatic blocks 3 are erected on a plane of structure surrounded by the columns 1 and beams 2 of a building while two diagonal lines of each aseismatic block 3 are individually directed to the vertical direction and horizontal direction and the junctions 4 of the adjacent aseismatic blocks 3 are located nearby. The junctions 4 located nearby are connected together, the columns 1 or beams 2 and the junctions 4 near them are connected together, and the open feeling, ventilation property, and light transmission property are applied to the plane of structure via window-like holes 8 in the aseismatic blocks 3 and transmission holes 9 between the aseismatic blocks 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for strengthening seismic performance by arranging seismic resistant blocks on a construction surface surrounded by columns and beams in a building to improve seismic performance of the building, and a seismic resistant block used for the method.

[0002]

2. Description of the Related Art As a conventional method for improving the seismic performance of a building by providing a seismic wall on the structure surrounded by columns and beams of the building, for example, it is described in Japanese Patent Publication No. 60-1470. There is something like

That is, according to this prior art, the surfaces of the columns and beams of the existing building are mounted, and
A large number of anchor reinforcements are projected in a row at predetermined intervals toward the premises of the column / beam frame, and the anchor reinforcements are used to arrange reinforcements over the entire surface of the construction, so that the reinforcements are covered. It is intended to improve the seismic performance of the building by temporarily constructing a formwork on the entire surface of the structure and placing cast-in-place concrete to construct an earthquake resistant wall that covers the entire surface of the structure.

[0004]

However, according to the above-mentioned conventional technique, it is necessary to drive the concrete on site so as to fill the entire surface of the column-beam frame in the construction of concrete. There is a drawback that the construction period is long because there are many temporary materials.

Further, according to the above-mentioned conventional technique, since the entire structure surrounded by the columns and beams of the building is closed,
It also has a drawback that it cannot be installed in a place where the passage of airflow and light is required.

Therefore, the present invention has been made in view of the above problems, and it is an object of the present invention to provide a method for strengthening seismic performance of a building and a seismic resistant block capable of improving seismic performance by simple field work. I am trying.

[0007]

In order to solve the above-mentioned problems, the method for strengthening seismic resistance of a building according to claim 1 of the present invention comprises a plurality of seismic resistant blocks each having at least three connecting portions on the outer periphery thereof. Prepare and arrange the seismic resistant blocks on the structure surrounded by the pillars and beams of the building, with their postures along the structure and with the connecting parts of adjacent seismic blocks facing each other. , The opposing connecting portions,
And a column or a beam and a connecting portion of the seismic resistant block facing the column or the beam, respectively.

"Making the connecting parts face each other" means that the connecting parts are in a state before they are connected to each other by bolts and nuts. A conventional means is used as the connecting means, but depending on the connecting means, a small gap is provided between the connecting portions,
Further, the connecting portions may be brought into contact with each other depending on another connecting means.

Each seismic resistant block may be connected to the connecting part of another seismic resistant block adjacent to the seismic resistant block each time the seismic resistant block is arranged, or the connecting parts facing each other after disposing a plurality of seismic resistant blocks. May be connected. The connection between the connecting portions may be performed using other connecting tools such as bolts and nuts, or may be performed using only the connecting tools provided in the connecting portions.

Next, the invention according to claim 2 is the invention according to claim 1, wherein the seismic resistant block has a shape of a main body of a substantially quadrilateral shape having a predetermined thickness, and a connecting portion at each of four corners. It is a precast member, and is characterized in that each of the seismic resistant blocks is arranged in a posture in which diagonal lines are directed in the vertical direction and the horizontal direction.

Since the quadrilateral seismic resistant blocks are connected at the four corners in a posture in which the diagonal lines are directed in the vertical and horizontal directions, a quadrilateral space is formed between the seismic resistant blocks. In this way, since a large number of transmission holes are formed in the construction surface, there is a feeling of openness and the airflow and light can be transmitted.

Next, the invention described in claim 3 is the same as claim 1
The present invention relates to an earthquake-resistant block used for carrying out the invention, and is characterized in that it has at least three connecting portions on its outer peripheral portion.

Here, the shape of the seismic resistant block is not limited, and a block such as a circle or a polygon can be used.
Next, the invention described in claim 4 also relates to an earthquake-resistant block used only for carrying out the invention of claim 1, which has a quadrangle of a predetermined thickness and is provided with connection portions at four corners,
It is characterized in that it has an opening penetrating the front and back in the central portion.

Since this seismic resistant block has a rectangular shape, a plurality of seismic resistant blocks can be arranged vertically and horizontally within the construction plane by arranging two diagonal lines so as to be vertical and horizontal. become.

Further, since an opening penetrating the front and back is formed in the central portion, a large number of the perforation holes between the seismic blocks and the opening of the seismic block are provided in the construction surface. Therefore, the feeling of liberation is increased and sufficient airflow and light transmission are possible.

Next, the earthquake-resistant block according to claim 5 is
The seismic resistant block according to claim 4, wherein a quadrangular frame-shaped steel frame is used as a core, and a reinforcing bar is arranged around the steel frame outer periphery of the side part and concrete is injected, so that the side part has a steel frame reinforced concrete structure and a corner. It is characterized in that the corner portion is a joint portion and the steel frame exposed at the corner portion is a connection piece.

According to the present invention, the compressive load is mainly carried by the concrete portion, and the tensile load is mainly carried by the steel frame portion which is the core. Next, the invention according to claim 6 is the same as claim 5
In contrast to the configuration described in (1) above, the seismic resistant block is divided into two with one diagonal line of the quadrangle as a boundary, and is composed of two substantially V-shaped seismic resistant blocks. It is a thing.

Next, the invention described in claim 7 is the same as claim 5.
In contrast to the configuration described in (1), the seismic resistant block is characterized by being composed of four bar-shaped seismic resistant blocks divided into four with two diagonal lines of the quadrangle as boundaries.

According to the invention of claim 6 or 7, the size of one seismic block is reduced, and the work of suspending the block for transportation and mounting becomes easier. Also,
Such a seismic resistant block is convenient when connecting the space between the seismic resistant block group arranged on the surface of the column-beam structure and the relevant pillar-beam.

Next, the method for strengthening the seismic performance of a building according to the invention of claim 8 is the same as that of claim 1.
A plurality of seismic blocks are stacked by sequentially stacking at least one seismic block according to claim 5 to claim 7 while connecting the connecting pieces to each other so that the diagonal lines face the vertical direction and the horizontal direction. The construction is characterized in that the connection piece of the seismic resistant block facing the pillar or the beam is joined to the pillar or the beam while being arranged on the entire area of the structure surrounded by the pillar and the beam of the building.

According to the present invention, the sides of each seismic resistant block and the axis of the block member are set in an oblique direction, so that the sides of the steel core are coaxially continuous and installed between the columns and beams in an oblique lattice pattern. It

Next, the invention according to claim 9 relates to claim 8
In contrast to the configuration described in, the connection between the connection pieces of the seismic resistant block is performed by causing the connection pieces to face each other along the construction surface and bolting the facing connection pieces to each other through a connecting plate. It is characterized by being called.

Next, the invention according to claim 10 is different from the structure according to claim 8 or 9 in that after connecting the connecting pieces of the seismic resistant block to each other with bolts, a reinforcing bar is arranged at the connecting portion. It is characterized in that it is filled with mortar or concrete and connects adjacent seismic blocks.

Next, in the invention described in claim 11, in addition to the structure described in any one of claims 8 to 10, the connection between the pillar or the beam and the connecting piece of the seismic resistant block is
The rail-shaped fixing hardware is fixed to the pillar or the beam along the extending direction, and the rail-shaped fixing hardware and the connecting piece of the seismic resistant block are bolted to each other. .

Next, in the invention described in claim 12, in addition to the structure described in claim 11, after connecting the connecting piece of the seismic resistant block and the fixing metal member by bolts, at least the connecting portion is provided with a reinforcing bar, It is characterized in that the seismic resistant block is connected to the column or beam by filling with mortar or concrete.

[0026]

Next, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, the present embodiment will be described in a form in which a seismic resistant block 3 is arranged on a construction surface surrounded by columns 1 and beams 2 in an existing building to enhance the seismic performance of the building. Of course, it can be used for a new building as well.

Here, in FIG. 1, only one seismic resistant block 3 is conspicuously displayed, but in reality, all blocks have the same color. Further, the pillar 1 and the beam 2 are either of steel-reinforced concrete construction, reinforced concrete construction, or steel-framed reinforced concrete construction, and the vicinity of the upper surface of the lower beam 2 is the floor level FL of the floor as shown in FIG. ing.

As shown in FIG. 2, which is a perspective view, the seismic resistant block 3 has a square shape in which four sides 3a having the same length are crossed at a right angle, and four corners which are part of the outer peripheral portion are formed. The notch 3b is formed by notching. Then, a connection piece 3c made of a steel plate is projected from the cutout portion 3b, and the connection portion 4 is formed by the connection piece 3c and the cutout portion 3b.

Since the four connecting portions 4 are formed at the four corners of the main body of the square seismic resistant block 3, they are arranged at equal intervals along the same circumference. FIG. 7 shows that the connection centers 4a of the connection portions 4 are arranged at equal intervals on the circumference 11 shown by the chain line.

One of the connecting pieces 3c may be provided in one notch 3b, or a plurality of the connecting pieces 3c may be provided. This connecting piece 3c is 2 in FIG.
In addition, one provided in FIG. 4 is illustrated as an example. Further, the shape and the structure of the connecting piece 3c are appropriately selected from the commonly used types according to the connecting means adopted.
It shall be selected and used.

The cross section of the side 3a of the seismic resistant block 3 is shown in FIG. 3. The seismic resistant block 3 is formed by placing concrete with the main frame 6 and the stirrup 7 arranged around the steel frame 5 as the core. Is an integrally formed precast member, and an opening 8 penetrating the front and back is formed in the central portion.

Further, as shown in FIG. 1, a peripheral frame 12 is provided inside the left and right pillars 1 and the upper and lower beams 2 which are frame-shaped as a whole.
Is provided. As shown in FIG. 5, which is a cross-sectional view of the lower beam 2, the peripheral frame 12 includes each pillar 1 and each beam 2.
The anchor bars 13 that are planted in two rows along these longitudinal directions, the main bars 14 that are installed so as to extend in the longitudinal direction, the stirrups 15 that connect them, and the reinforcing bars It consists of cast-in-place concrete 16 that is cast to cover 13, 14 and 15.

As will be described later, the concrete 16 is placed after the seismic resistant block 3 located at least in the vicinity of the pillar 1 and the beam 2 is disposed, and by the time the disposition of the seismic resistant block 3 is completed. The anchor muscles 13 are at least in a reinforced state.

Next, a procedure for arranging the seismic resistant block 3 in the construction plane surrounded by the columns 1 and the beams 2 will be described. First, the anchor bar 13, the main bar 14, and the bar bar 15 for forming the peripheral frame 12 are applied to the column 1 and the beam 2.

In this state, the seismic resistant block 3 is arranged on the peripheral frame 12 above the lower beam 2 with two diagonal lines being vertical and horizontal. In the example of FIG. 1, the bottommost six seismic resistant blocks 3 are arranged side by side, but between the seismic resistant blocks 3, the connecting portions 4 are opposed to each other along the construction surface and temporarily fixed. In addition, the connecting portion 4 located below each seismic block 3
Then, the connection piece 3c is fixed to at least one of the reinforcing bars 13, 14, 15 of the peripheral frame 12 by using a metal fitting (not shown). The connection piece 3c is similarly fixed to the peripheral frame 12 inside the pillar 1.

In this way, in the case of FIG. 1, the seismic resistant blocks 3 are stacked in three stages, and the connecting pieces 3c are connected between adjacent seismic resistant blocks 3 and the inside of the pillar 1 and the bottom of the upper beam 2 are connected. The connection piece 3c is fixed to the peripheral frame 12 on the side in the same manner as described above, and each connection portion is finally stopped.

After that, the above-mentioned anchor bar 1 of the pillar 1 and the beam 2
3, molds (not shown) are arranged on the front and back of the main bar 14 and the band 15, that is, on both sides of the pillar 1 and the beam 2 in the width direction, and the cast-in-place concrete 16 is cast here. With this concrete 16, the seismic block 3 is attached to the peripheral frame 1
2 and the connecting part 4 of each seismic block 3
Cement mortar is filled in the notch 3b.

The above procedure is merely an example, and it goes without saying that other procedures may be adopted. For example, the work of permanently stopping the connection between the seismic resistant blocks 3 may be performed every time one seismic resistant block 3 is built, or every several seismic resistant blocks 3 are built.

As shown in FIG. 7, the seismic resistant block 3 has the connecting center 4a of the connecting portion 4 set at the position where the center line 3d in the width direction of the side 3a intersects. The center line 3d on each side is continuous on a straight line. Therefore, since the center line 3d has an angle of 45 degrees with respect to the horizontal plane, the series of sides 3a between the upper beam 2 and the lower beam 2 or between the beam 2 and the pillar 1 is braceed. The seismic performance is improved.

Further, by making the center line 3d continuous on a straight line as described above, the dimensions of the opening 8 and the transmission hole 9 are the same, and a uniform open hole is formed on the entire structure surface. In addition, when the strength of the pillar 1 and the beam 2 is relatively large and the strength of the seismic resistant block 3 may be relatively low, as shown in FIG. The steel frame can be omitted.

In both of the above embodiments, the seismic resistant block 3 is provided with the opening 8. However, the seismic resistant block of claim 1 is not limited to the presence or absence of the opening 8. Therefore, the opening 8 is present. It may be a seismic resistant block, or even if the opening 8 is present, its shape is not a square as described above, but a shape similar to a circle, another polygon, or the shape of something. Good. When the opening 8 is provided, the construction surface surrounded by the pillar 1 and the beam 2 is added with the opening 8 in addition to the transmission hole 9 formed between the earthquake-resistant blocks 3.
Not only does the feeling of openness increase, but the amount of airflow and light passing through also increases.

Further, since the seismic resistant block 3 is made of precast concrete, it is produced at the factory, so that it is not necessary to install a formwork on the entire construction surface at the site and to place cast concrete in the formwork. In addition, since it is possible to reduce the number of temporary materials such as the ends that support the formwork, the construction is simplified and the construction period is shortened.

FIG. 8 is a diagram showing another embodiment of the seismic resistant block 3, which is an example in which the front shape of the seismic resistant block 3 is an equilateral triangle. A connecting portion 4 is provided at each vertex of this equilateral triangle. Therefore, also in the seismic resistant block 3, the connecting portions 4 are arranged on the same circumference and at equal intervals.

FIG. 9 is a view showing still another embodiment of the seismic resistant block 3, in which the seismic resistant block 3 has a circular front shape and four connecting portions 4 are provided on the outer periphery thereof to form one seismic resistant block 3. By connecting four seismic resistant blocks 3 to the outer periphery of, the seismic resistant blocks 3 are connected in the vertical and horizontal directions of the construction plane. In this example, four connecting portions 4 are provided on one seismic resistant block 3 and four joint portions 4 are arranged so as to face each other vertically and horizontally, but each four joint portions are arranged in an oblique direction. It is preferable to dispose the seismic blocks so that they face each other. This is because the force transmission in the diagonal direction becomes smooth.

Similarly, if the seismic resistant block 3 is rotated from the state shown in FIG. 9 to the left or right and each connecting portion 4 (or 41) is moved to the circumferential direction, the seismic resistant blocks connected to each other can be connected. The continuous direction of 3 can be changed from the above vertical and horizontal directions.

As the shape of the seismic resistant block 3, it is also possible to appropriately adopt a regular pentagon, a regular hexagon, a star or the like in addition to the above examples. Then, depending on the shape of the seismic resistant block 3, the transmission holes 9 formed between the seismic resistant blocks 3 are formed.
Of course, the shape of changes. 8 and 9
In the embodiment described above, the opening 8 shown in FIGS. 1 and 2 is not formed in each seismic resistant block 3, but it is needless to say that the opening 8 may be formed.

Next, a second embodiment will be described with reference to the drawings. The same members as those in the above embodiment will be described with the same reference numerals. As shown in FIG. 10, this embodiment will also be described with an example in which the seismic resistant block 3 is arranged on the construction surface surrounded by the columns 1 and the beams 2 in the existing building to enhance the seismic performance of the building. Of course, it can be used for a newly built building as well. Here, FIG. 10 shows a front view after completion of earthquake-resistant construction.

As shown in FIG. 11 which is a perspective view, the seismic resistant block 3 of this embodiment is also a square lattice type block in which four sides 3a of equal length are crossed at a right angle,
The four corners, which are a part of the outer peripheral portion, respectively configure the connecting portion 4.

As shown in FIG. 12, the seismic resistant block 3 has a rectangular frame-shaped steel frame (steel plate) 50 as a core, and the outer periphery of the four side portions of the frame made of the core steel frame 50 is
Main reinforcing bars (not shown) arranged in parallel with the core steel frame 50
And a plurality of stirrups arranged in the extending direction of the steel frame (not shown)
Is placed and concrete 51 is cast to form a rectangular rod.

Further, the four corners of the core steel frame 50 are notched obliquely to form a connecting piece 3c. Here, this cutout line is set so that the end surface of the connecting piece 3c becomes a horizontal surface or a vertical surface when the seismic resistant block 3 is in a posture in which the diagonal lines of the four sides 3a formed by the seismic resistant block 3 are oriented vertically and horizontally. Has been done. That is, it is cut out at an inclination of 45 degrees.

Since the four connecting portions 4 are formed at the four corners of the square shape, they are located at equal intervals along the same circumference. As described above, the seismic resistant block 3 is a precast member that is wholly integrated, and as a result, an opening that penetrates the front and back is formed in the central portion.

Further, a rail-shaped fixing hardware is used to join the seismic resistant block 3 to the pillar 1 and the beam 2. The following two types are used as the fixing hardware. One is Figure 1
3 and FIG. 14, which is an elongated rail-shaped fixing hardware 52 (hereinafter referred to as a rail-shaped fixing hardware), the horizontal portion 52a arranged in parallel with the pillar 1 or the beam 2 to be attached.
And a vertical portion 52b projecting upward from the center of the horizontal portion 52a in the width direction, and has an inverted T-shaped cross section. Further, anchor bolts 52c are planted in the vertical portion 52b along the extending direction thereof. However, the anchor bolt 52c is not provided in the vertical portion 52b of the portion that is joined to the seismic resistant block 3, but the joining bolt hole 52d is provided.

Another, that is, the second fixing hardware 53 is
As shown in FIG. 15, a short rail-shaped fixing hardware,
The main body has a horizontal plate 53a arranged parallel to the column 1 or the beam 2 to be attached, and a vertical plate 53b protruding upward from the widthwise center of the horizontal plate 53a to form an inverted T-shaped cross section. There is. Then, two rebars 53c are respectively extended from the vertical plate 53b in the extending direction of the beam 2. In addition, the horizontal plate 53a, the bolt hole 53d through which the bolt is inserted
And a vertical plate 53b also has a bolt hole 53e through which a bolt is inserted. Further, in the second fixing hardware 53 arranged at the corners, the vertical plate 53b is L-shaped as shown in FIG. This L-shaped portion is arranged along the corner portion of the column beam 2.

Next, the procedure for arranging the seismic resistant block 33 in the construction plane surrounded by the columns 1 and the beams 2 will be described. First, the lower surface of the upper beam 2b, the upper surface of the lower beam 2 and the surfaces of the two columns 1 facing each other are respectively removed to remove the finish, and then the anchors are attached to the respective surfaces. A large number of reinforcing bars (not shown) are driven in the extending direction so as to project. Also,
Regarding the left pillar 1b and the upper beam 2b, stud bolts are attached to the portions where the second fixing hardware 53 is installed (see FIG. 18).

Although FIG. 18 shows the seismic resistant block 3 as a V-shaped block member that is divided into two parts, in the case of the integral rectangular frame-shaped seismic resistant block 3 up to the position of the one-dot chain line. There is concrete on the side 3a.

Further, a chain block for suspending the seismic resistant block 3 is installed while being supported by the upper beam 2b or the like. Next, the rail-shaped fixing hardware 52 is attached along the lower beam 2a and the right pillar 1a. As shown in FIG. 14, the rail-shaped fixing hardware 52 is installed with a predetermined distance from the surface of the projecting pillar 1 or beam 2 and supported by ultra-fast mortar or metal, and the seismic resistant block 3 is installed. It also functions as a positioning ruler when installing.

Thus, the lower beam 2a and the right pillar 1 are
By installing the rail-shaped fixing hardware 52 that is continuous along a, the mounting accuracy of the seismic resistant block 3 is improved and the construction stability is secured.

However, in consideration of the distance between the actual columns 1 and the error in the actual mounting dimensions, the continuous rail-shaped fixing hardware 52 is not provided on the upper beam 2b and the left column 1b. , It is a relief for mounting.

Then, as shown in FIG. 17, the second fixing hardware 53 is provided on the left pillar 1b and the upper beam 2b.
Have been installed. In this installation, as shown in FIG. 18, the bolt 55 projecting from the beam 2 is passed through the bolt hole 52d provided in the horizontal portion 52a, and the nuts 56 are provided on both sides of the horizontal plate 53a. 53a is sandwiched and fixed to the bolt 55, and the nuts 5
By rotating 6 the distance of the second fixing hardware 53 from the beam 2 can be adjusted. As a result, a relief is secured when the seismic resistant block 3 is actually assembled.

Next, as shown in FIG. 13, a plurality of base-stage seismic resistant blocks 33 are installed along the rail-shaped fixing hardware 52 on the lower beam 2a. Each seismic block 3 is arranged in a posture in which two diagonal lines are vertical and horizontal, and the lower connecting portion 4 is opposed to the vertical portion 52b of the rail-shaped fixing hardware 52 in the vertical direction along the construction surface, In addition, the connecting portion 4 facing in the horizontal direction is opposed to the connecting portion 4 of the other adjacent rail-shaped fixing hardware 52 in the horizontal direction along the construction surface.

At this time, as shown in FIG. 19, the connection between each seismic resistant block 3 and the rail-shaped fixing hardware 52 is such that it extends over the connecting piece 3c of the seismic resistant block 3 and the vertical portion 52b of the rail-shaped fixing hardware 52. And the connecting plate 58 along the construction surface.
Is abutted, and the connection piece 3c, the vertical portion 52b, and the connection plate 58 are sequentially adjusted in accuracy and temporarily tightened. Two connecting plates 58 are used and are installed so as to sandwich the connecting piece 3c and the vertical portion 52b from both the front side and the back side.

The connecting piece 3c of the seismic block 3 adjacent to each other
As shown in FIG. 20, a connecting plate 59 having a cruciform shape in front view is prepared to connect the connecting plates 59 to both connecting pieces 3c so as to straddle the two connecting pieces 3c with respect to the back surface and the front surface. Abut so as to straddle, and adjust the accuracy one after another, then
As shown in FIG. 21, each connecting piece 3c and connecting plate 59
And are temporarily tightened with bolts to connect.

Further, the seismic block 3 adjacent to the right pillar 1
Connection piece 3c and rail-shaped fixing hardware 5 attached to the pillar 1
In the same manner as described above, bolts are also connected to the two via the connecting plate 58 (see FIG. 19).

Here, the seismic resistant block 3 is attached sequentially from the right side of the pillar 1a. And the joining of the connection piece 3c facing the left column 1b of the leftmost seismic block 3 and the left column 1b through the second fixing hardware 53 is
After the nut 56 is rotated to adjust the position of the second fixing metal piece 53, the nut 56 is connected to the vertical plate 53b of the second fixing metal piece 53 via the connecting plate 58 by bolting (see FIG. 18).

Next, the seismic resistant block 3 of the second stage is attached. This is to hang the seismic resistant block 3 in sequence with a chain block, stack it on the base seismic resistant block 3 installed earlier, and in the same way as described above, connect the connecting pieces 3c that face each other along the construction surface in a cross shape. And the connection piece 3c of the rightmost seismic block 3 is bolted to the opposing right rail-shaped fixing hardware 52 through the connection plate 58 by the same means as described above. .

Also in this case, the seismic resistant block 3 should be attached as follows.
The process is sequentially performed from the right side column 1a side. Then, the connection piece 3c facing the left column 1b of the leftmost seismic block 3 and the left column 1b through the second fixing hardware 53 are joined together by rotating the bolt to form the second column. After the position of the fixing metal piece 53 is adjusted, the fixing metal piece 53 is connected to the vertical plate 53b of the second fixing metal piece 53 via the connecting plate 58 by bolting.

Next, the seismic resistant block 3 of the third stage is attached. This is the same as the installation of the seismic resistant block 3 in the second step above.
Are hung up and stacked on the second-stage seismic resistant block 3 installed earlier, and the connecting pieces 3c facing each other along the joint surface are bolted to each other via the cross-shaped connecting plate 59 in the same manner as described above. At the same time, the connecting piece 3c of the rightmost seismic block 3 is bolted to the opposing right rail fixing metal piece 52 through the connecting plate 58 by the same means as described above.

Further, the connecting piece 3 of the seismic resistant block 3 at the leftmost end
The c is attached to the opposite left side pillar 1b through the second fixing hardware 53 and the connecting plate 58. Furthermore, after adjusting the position of the second fixing hardware 53 that fixes the connecting piece 3c of each earthquake-resistant block 3 to the upper beam 2b, the second fixing hardware 53 is connected via the connecting plate 58. To be temporarily fixed to the upper beam 2b.

After the final position adjustment and tilt adjustment of each seismic resistant block 3, the bolts temporarily tightened at each connecting portion 4 are finally tightened. This completes the installation of the seismic resistant block 3 on the structural surface of the beam / column 2 frame.

The tilt adjustment of the seismic resistant block 3 to be loaded can be realized by supporting it with a metal fitting for scaffolding that extends horizontally from a column temporarily provided on the back surface of the beam-column structure. This also serves to prevent the loaded seismic blocks 3 from falling.

Next, reinforcement of the peripheral 3a frame is performed (see FIG. 14). That is, the main rebar 61 along the pillar 1 and the beam 2
And the hoop reinforcement 60 is arranged. The hoop muscle 60 is formed by combining U-shaped reinforcing bars from the front and rear to form a band. Further, a portion where the pitch of the hoop muscle 60 cannot be taken around the connection portion with the connection piece 3c is adjusted by increasing the bar arrangement density by shifting. Further, the reinforcing bar 53 extending to the left and right of the second fixing hardware 53.
Fasten c to the hoop muscle and fix it. Here, FIG.
In the figure, reference numeral 62 denotes an anchor rebar projecting from each surface of the column beam structure.

Then, a mold is assembled to the peripheral 3a frame and mortar is cast to construct the peripheral 3a frame portion 12. In parallel with the construction of the peripheral frame portion 12, the construction of the connecting portion 4 between the seismic resistant blocks 3 is also performed. That is, concrete is placed by arranging reinforcing bars for the connecting portions 4 having a square shape in a front view, which are formed by joining the facing connecting portions 4 to each other as described above.

The rebar to be installed is formed into a shape as shown in FIG. 22, which is a perspective view, and is composed of two rod-shaped rebars 64.
Are arranged in parallel, and the U-shaped reinforcing bars 64 (hoop bars) are straddled over both ends of the two reinforcing bars 64, and the contact portions are joined together by welding or the like. Two sets of reinforcing bar members 66 are prepared, and as shown in FIG. 22 and FIG. 23 described above, four rod-shaped reinforcing bars 64 are formed in a cross beam shape, and the foot portion 65a of each U-shaped reinforcing bar 65 is Connection part 4
It is placed through the gap formed in the corner of the. Do this from the opposite side, and let the U-shaped rebar 6 penetrated from both sides.
5 (hoop muscles) of the foot portions 65a are bound together to form the connecting portion 4
The bar arrangement is completed.

Subsequently, a mold is attached so as to close both sides of the connecting portion 4, and the connecting portion 4 is filled with mortar. As for the filling of mortar, there is a gap between the two sides 3a of the seismic resistant block 3 which intersect at right angles. Therefore, the mortar may be filled from this gap, or a filling hole may be provided in the formwork itself. You may fill from.

As the mortar filled in the peripheral frame portion 12, for example, non-shrink mortar is used. In terms of cost, we use a non-shrink mortar of on-site mixing type, and place a premixed non-shrink mortar with excellent filling properties at the end with the top 5 cm as a guide.
If a gap is created at the top, non-shrink mortar is re-injected with a hand pump.

In addition, since the filling amount of the connecting portion 4 between the seismic resistant blocks 3 is small and the members are crowded,
Premix non-shrink mortar is poured from the upper side, and the V-shaped valley is semi-cured and finished with gold levers.
Since mortar is a structure, a test piece is sampled and inspected.

After the above mortar has hardened, the formwork is removed and plaster repair work is performed. After that, paint finish is performed.
This completes the installation of the seismic wall using the seismic block 3.

The above procedure is merely an example, and it goes without saying that another procedure may be adopted. For example, the work of permanently stopping the connection between the seismic resistant blocks 3 may be performed every time one seismic resistant block 3 is built, or every several seismic resistant blocks 3 are built.

Even when the seismic resistant block 3 is installed, since the connection center of the connecting portion 44 is set at the position where the widthwise centerlines of the sides 3a intersect, the centerline of each side 3a of each connected seismic resistant block 3 is Continue in a straight line. Therefore, since the center line has an angle of 45 degrees with respect to the horizontal plane, the series of sides 3a is a brace between the upper beam 2 and the lower beam 2 or between the beam 2 and the pillar 1. Seismic performance is improved.

The tensile force acting on each connecting portion 4 is entirely borne by the core steel frame 50 and the high-strength bolt. Then, the tensile force input from the beam 2 is borne by the core steel frame 50, and the compressive force is borne by concrete.

Further, by making the center line continuous on a straight line as described above, the dimensions of the opening 8 and the transmission hole 9 are the same, and a uniform open hole is formed on the entire structure surface. In the above embodiment, the seismic resistant block 3 is provided with the opening 8. However, since the seismic resistant block 3 of claim 1 is not limited to the presence or absence of the opening 8, the seismic resistant block having no opening 8 is present. It may be 3.

Further, since the seismic resistant block 3 is made of precast concrete, it is manufactured at the factory, so that it is not necessary to install a formwork on the entire construction surface at the site, and to cast cast concrete into it. In addition, since it is possible to reduce the number of temporary materials such as the ends that support the formwork, the construction is simplified and the construction period is shortened.

Here, in the above description, it is explained that the seismic resistant blocks 3 which are integrally formed in the rectangular frame shape are simply stacked, but as shown in FIG. 3 is divided into two diagonal lines on one side and is used in combination with a block-shaped block member 70 (seismic resistant block) or used as a part of the seismic resistant block 3 to be arranged in the frame of the beam / column 2 frame. May be.

When the doglegged block member 70 is used, the weight can be reduced during transportation and lifting. Moreover, when combining with the above-mentioned seismic resistant block 3, this doglegged block 7 is mainly provided in the part facing the pillar beam 2.
0 is used.

The V-shaped block member 70 shown in FIG. 24 has a shape in which concrete at both end portions is cut out obliquely in consideration of the connection with the pillar beam 2, but the two are used in combination. If not, use one that has not been cut out. That is, there is concrete on the side up to the position indicated by the alternate long and short dash line in FIG.

At this time, the end portion of the block member is the column beam 2
In some cases, the vertical plate 53b of the second fixing hardware 53 is L-shaped.
A character type (see FIG. 16) may be used.

Further, as shown in FIG. 25, the rectangular frame-shaped seismic resistant block 3 may be arranged in a diagonal lattice by combining rod-shaped block members 71 which are divided into 40% with two diagonals as boundaries. .

Further, in order to change the appearance of the oblique grid, as shown in FIG. 26, the side 3a of the seismic resistant block 3 may be arranged to be rotated by 45 degrees around the central axis. Further, the shape of the opening 8 formed in the central portion by connecting the sides 3a to each other is circular or cruciform as shown in FIGS. 27 and 28, and the shape of the opening 8 is arbitrary. Good as

Furthermore, the contour of the outer peripheral side of the side 3a is also uneven or curved, and the cross-sectional shape of the transmission hole 9 formed between the adjacent seismic resistant blocks 3 joined is not rectangular.
You may set so that it may become circular shape.

Further, in the above-mentioned embodiment, the frame of the core iron frame 50 serving as the core of the seismic resistant block 3 is described as a square, but as shown in FIG. 29, it may have a rhombic shape or a rectangular shape. . Note that FIG. 29 shows an example in which the block member is formed of two doglegs.

However, the side 3a of each seismic resistant block 3 placed
Set so that the central axes of the parts are coaxial. In addition, in the said embodiment, although the example which installs the seismic resistant block 3 on the whole structure surface of the pillar beam 2 frame | frame and improves seismic resistance is demonstrated, for example, one pillar 1 and the seismic resistant block 3 are joined. Instead, it may be designed to provide a space between the pillar 1 and the seismic resistant block 3.

[0092]

According to the invention of claim 1, since a large number of seismic resistant blocks prepared in advance are built on the structural surface surrounded by columns and beams, the seismic performance of a new or existing building is strengthened. Installing a formwork on the entire surface and eliminating the work of placing cast-in-place concrete inside it reduces the work on site and reduces the temporary materials such as the joists supporting the formwork. Because it can be done, the construction is simple and the construction period is shortened.

According to the second aspect of the present invention, the seismic resistant block has a quadrilateral having a predetermined thickness and connection portions are formed at the four corners, and the two diagonal lines of the quadrilateral are individually provided in the vertical direction and the horizontal direction. Since the seismic blocks are connected in the four corners, the quadrilateral space is formed between the seismic blocks. For this reason, since a large number of transmission holes 9 are opened in the construction surface, in addition to the above effect of the first aspect, there is a feeling of openness, and airflow and light can be transmitted.

According to a third aspect of the present invention, the seismic resistant block has at least three connecting portions formed on the outer peripheral portion thereof.
The method for enhancing seismic performance of claim 1 is realized, whereby
The same effect as that of the invention of FIG.

According to the seismic resistant block of the invention of claim 4,
Since the front shape is square, the sides of a plurality of seismic blocks are continuous at an angle of 45 degrees in the construction plane by building them so that the two diagonals are vertical and horizontal.
For this reason, the pillars function as braces within the structure surrounded by the beams, which can greatly contribute to the enhancement of seismic performance. In addition to the transmission holes 9 formed between the seismic resistant blocks, the seismic resistant block itself has the openings 8 formed therein, so that a feeling of liberation can be obtained on the above-mentioned construction surface, and airflow and light can be passed through. It is convenient for air conditioning and lighting.

According to the seismic resistant block of the invention of claim 5,
The core of the block is made of an integrated core steel frame, and the proof stress of the seismic resistant block itself can be improved. According to the earthquake-resistant block of the invention of claim 6, each block member becomes light in weight, ready for transportation and hanging, and the workability is improved.

According to the seismic resistant block of the invention of claim 7,
Furthermore, the weight of each block member is reduced, making it easier to carry and hang up, thus improving workability. Further, according to the earthquake-resistant block of the inventions of claims 6 and 7, only a part of the rectangular frame-shaped earthquake-resistant block can be arranged in accordance with the space of the mounting portion.

According to the method for enhancing seismic performance of a building of claim 8 of the present invention, the side portions of the cores of the seismic blocks are joined obliquely and coaxially, which simplifies the on-site construction and reduces the space between pillars and beams. It is possible to provide the same strength as seismic reinforcement by arranging a long core steel member as a brace.

At this time, if the invention of claim 9 is adopted,
The tensile force can be smoothly transmitted between the core steel frames of the seismic block. Further, by adopting the invention of claim 10,
The concrete on the sides of adjacent seismic blocks can also be completely integrated to enable smooth transmission of compressive force.

According to the invention of claim 11, the seismic resistant block and the beam can be joined by the rail-shaped fixing metal object, and the seismic resistant block arranged by the rail-shaped anchoring metal object can be easily positioned, so that the seismic resistance can be achieved. The block mounting accuracy is improved.

According to the twelfth aspect of the invention, there is an effect that the seismic resistant block group and the column-beam frame structure are surely integrated.

[Brief description of drawings]

FIG. 1 is a front view showing a column-beam frame structure according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing an example of an earthquake-resistant block according to the first embodiment of the present invention.

FIG. 3 is a cross-sectional view of a side of the seismic block in FIG.

FIG. 4 is a perspective view showing a state in which seismic resistant blocks having different numbers of connection sides of a connection portion are assembled facing each other.

5 is a vertical cross-sectional view showing a connection state of the lower beam, the peripheral frame above it and the seismic block in FIG.

FIG. 6 is a cross-sectional view showing another example of the sides of the seismic block shown in FIG.

FIG. 7 is an explanatory diagram showing a relationship between a center line in a width direction of a side of the earthquake-resistant block, a center position of a connection portion, and a circumference according to the first embodiment of the present invention.

FIG. 8 is a front view showing another embodiment according to the first embodiment of the present invention.

FIG. 9 is a front view showing another embodiment according to the first embodiment of the present invention.

FIG. 10 is a front view showing a beam-column structure according to a second embodiment of the present invention.

FIG. 11 is a perspective view showing an earthquake-resistant block according to a second embodiment of the present invention.

FIG. 12 is a diagram showing a core steel frame of an earthquake-resistant block according to a second embodiment of the present invention.

FIG. 13 is a diagram showing a facing arrangement relationship between an earthquake-resistant block and a rail-shaped fixing hardware according to a second embodiment of the present invention.

FIG. 14 is a cross-sectional view showing a coupling between an earthquake-resistant block and a rail-shaped fixing hardware according to a second embodiment of the present invention.

FIG. 15 is a perspective view showing a second fixing hardware according to the second embodiment of the present invention.

FIG. 16 is a perspective view showing another example of the second fixing hardware according to the second embodiment of the invention.

FIG. 17 is a view showing a facing arrangement relationship between an earthquake-resistant block and a second fixing member according to the second embodiment of the present invention.

FIG. 18 is a cross-sectional view showing the connection between the seismic block and the second fixing hardware according to the second embodiment of the present invention.

FIG. 19 is a cross-sectional view showing the connection between the seismic block and the rail-shaped fixing hardware according to the second embodiment of the present invention.

FIG. 20 is a front view showing the joining of the connecting portions of the seismic resistant block according to the second embodiment of the present invention.

FIG. 21 is a perspective view showing the joining of the connecting portions of the seismic resistant block according to the second embodiment of the present invention.

FIG. 22 is a perspective view showing a reinforcing bar member used for connecting the connecting portions according to the second embodiment of the present invention.

FIG. 23 is a view for explaining the arrangement of the reinforcing bar members at the joints according to the second embodiment of the present invention.

FIG. 24 is a diagram showing a dogleg-shaped block member according to a second embodiment of the present invention.

FIG. 25 is a diagram showing a rod-shaped block member according to a second embodiment of the present invention.

FIG. 26 is a diagram for explaining another example of the seismic resistant block according to the second embodiment of the present invention.

FIG. 27 is a diagram for explaining another example of the earthquake-resistant block according to the second embodiment of the present invention.

FIG. 28 is a diagram for explaining another example of the earthquake-resistant block according to the second embodiment of the present invention.

FIG. 29 is a diagram for explaining another example of the seismic resistant block according to the second embodiment of the present invention.

[Explanation of symbols]

 1 column 1a right column 1b left column 2 beam 2a lower beam 2b upper beam 3 seismic block 3a side 3b notch 3c connecting piece 3d center line 4 connecting part 4a connecting center 8 opening 9 transparent hole 11 circumference 12 Peripheral frame 41 Connection part 50 Core steel frame 51 Concrete 52 Rail-shaped fixing hardware 52a Horizontal part 52b Vertical part 53 Second fixing hardware 53a Horizontal plate 53b Vertical plate 58 Connecting plate 59 Connecting plate 66 Reinforcing bar member 70 V-shaped block member 71 Bar block member

Claims (12)

[Claims] 1. A plurality of seismic resistant blocks having at least three connecting portions on the outer periphery are prepared, and the seismic resistant blocks are placed on a structure surrounded by columns and beams of a building, and their postures are set on the structure. It is characterized in that the connecting portions of the seismic resistant blocks that are arranged alongside each other are arranged in a state of being opposed to each other, and that the opposing connecting portions are connected to each other, and the pillar or the beam and the connecting portion of the seismic resistant block that faces this are respectively joined. A method for strengthening the seismic performance of buildings. 2. The seismic resistant block is a precast member whose main body is a substantially quadrangular shape having a predetermined thickness and which is provided with a connecting portion at each of four corners.
The method for enhancing seismic performance of a building according to claim 1, wherein the diagonal lines are arranged in a posture in which the diagonal lines are oriented in the vertical direction and the horizontal direction. 3. A seismic resistant block having at least three connecting portions on its outer periphery. 4. A seismic block, which has a quadrangle having a predetermined thickness, is provided with connection portions at four corners, and has an opening portion penetrating the front and back sides in the central portion. 5. A quadrilateral frame-shaped steel frame is used as a core, and a reinforcing bar is arranged around the steel frame outer periphery of the side part to drive concrete into the steel frame, so that the side part has a steel frame reinforced concrete structure and a corner part is joined. The seismic resistant block according to claim 4, wherein the steel frame exposed at the corner portion is used as a connecting piece. 6. The seismic resistant block is composed of two V-shaped seismic resistant blocks that are substantially V-shaped and are divided into two at one diagonal of a quadrangle. Seismic block described in 5. 7. The seismic resistant block according to claim 5, wherein the seismic resistant block is composed of four bar-shaped seismic resistant blocks divided into four at two diagonals of a quadrangle. 8. By stacking at least one seismic block according to claim 5 to claim 7 in such a manner that diagonal lines are directed vertically and horizontally while joining connecting pieces to each other, A plurality of seismic resistant blocks are arranged on the entire area of a structure surrounded by columns and beams of a building, and connecting pieces of the seismic resistant blocks facing the columns or beams are joined to the columns or beams. Item 1. A method for enhancing seismic performance of a building according to item 1. 9. The joint between the connecting pieces of the seismic resistant block,
9. The method for enhancing seismic performance of a building according to claim 8, wherein the connecting pieces are opposed to each other along the joint surface, and the opposed connecting pieces are bolted to each other via a connecting plate. 10. The seismic block connecting pieces are bolt-joined to each other, and then reinforcing bars are arranged at the joints, and mortar or concrete is filled to connect adjacent seismic blocks. Alternatively, the method for enhancing seismic performance of a building according to claim 9. 11. The connection between the pillar or the beam and the connecting piece of the seismic resistant block is performed by fixing the rail-shaped fixing hardware to the pillar or the beam along the extending direction thereof, and the rail-shaped fixing hardware and the seismic block. The method for enhancing seismic performance of a building according to any one of claims 8 to 10, characterized in that the method is carried out by bolting the connecting piece of (1) to. 12. The seismic block is connected to the pillar or beam by bolting the connecting piece of the seismic block and the fixing hardware, and arranging a reinforcing bar at least in the joint part and filling mortar or concrete with the seismic block. The method for enhancing seismic performance of a building according to claim 11.