JP7787673B2 - How to replace or reinforce construction structures - Google Patents

Description

The present invention relates to a method for replacing or reinforcing a construction structure.

One conventional technique proposed for replacing multiple seismic isolation devices installed in a building involves installing a jack device between the upper and lower structures located around each seismic isolation device, and replacing each device while changing the height of the jack device (see Patent Document 1).

JP 2018-084038 A

Here, in the above-mentioned conventional technology, for example, when replacing two or more of a plurality of seismic isolation devices simultaneously, if the replacement is attempted without considering the relative positions of the two or more seismic isolation devices, an imbalance in the seismic isolation function of the seismic isolation devices throughout the building will occur. Therefore, if an external force, such as an earthquake or typhoon, acts on the building during the replacement, a torsional response that was not anticipated in the structural design will occur in the building, making it difficult to ensure the seismic isolation function of the multiple seismic isolation devices. Therefore, there is room for improvement in terms of quickly replacing or reinforcing a construction structure while ensuring the functions of multiple construction structures, such as the seismic isolation function of multiple seismic isolation devices.

The present invention was made in consideration of the above, and aims to provide a method for replacing or reinforcing a construction structure that enables the construction structure to be quickly replaced or reinforced while maintaining its functionality.

In order to solve the above-mentioned problems and achieve the objectives, the method for replacing/reinforcing a construction structure described in claim 1 is a method for replacing or reinforcing a plurality of construction structures that are installed on a structure and are capable of bearing at least the horizontal load of the structure, and includes a first step of simultaneously replacing or reinforcing a pair of construction structures among the plurality of construction structures that are positioned approximately symmetrically about a point, and the center of the approximately symmetrical point is the center of gravity of the structure or a position nearby.

The method for replacing or reinforcing a construction structure described in claim 2 is the method for replacing or reinforcing a construction structure described in claim 1, wherein, in the first step, of the pair of construction structures that are in the approximately point-symmetric positional relationship, the pair that is located farthest from the center of gravity of the structure is preferentially replaced or reinforced.

The method for replacing or reinforcing a construction structure described in claim 3 is the method for replacing or reinforcing a construction structure described in claim 1 or 2, wherein in the first step, pairs of construction structures that are positioned approximately point-symmetrically are sequentially replaced or reinforced around an axis whose central axis is the center of gravity of the structure.

The method for replacing or reinforcing a construction structure described in claim 4 is the method for replacing or reinforcing a construction structure described in any one of claims 1 to 3, and further includes, after the first step, a second step of simultaneously replacing or reinforcing a pair of construction structures that are positioned approximately line-symmetrically among the plurality of construction structures.

The method for replacing or reinforcing a construction structure described in claim 5 is a method for replacing or reinforcing a construction structure described in any one of claims 1 to 4, wherein the construction structure includes a seismic isolation device, a seismic control device, a column material, a brace material, a slab material, a beam material, and/or a pile material.

The method for replacing/reinforcing a construction structure described in claim 6 is the method for replacing/reinforcing a construction structure described in claim 5, wherein the seismic isolation devices include sliding bearings, and includes a third step of individually replacing the sliding bearings without being influenced by either the positional relationship of approximately point symmetry or approximately line symmetry with other seismic isolation devices.

The method for replacing or reinforcing a construction structure described in claim 1 includes a first step of simultaneously replacing or reinforcing a pair of construction structures that are positioned approximately point-symmetrically among a plurality of construction structures. Therefore, when simultaneously replacing or reinforcing a pair of construction structures, imbalances in the functionality of the plurality of construction structures can be prevented, and the plurality of construction structures can be quickly replaced or reinforced while maintaining their functionality.

According to the method for replacing or reinforcing a construction structure described in claim 2, in the first step, of a pair of construction structures that are positioned approximately point-symmetrically, the pair that is located farthest from the center of gravity of the structure is replaced or reinforced preferentially. This makes it possible to prevent imbalances in the functionality of multiple construction structures when replacing or reinforcing them, and makes it easier to ensure the functionality of multiple construction structures, compared to when the pair that is closest to the center of gravity of the structure is replaced or reinforced preferentially.

According to the method for replacing or reinforcing a construction structure described in claim 3, in the first step, a pair of construction structures that are positioned approximately point-symmetrically are replaced or reinforced sequentially around an axis whose central axis is the center of gravity of the structure, thereby enabling the replacement or reinforcement work of the construction structure to be carried out efficiently and improving the workability of the replacement or reinforcement work.

According to the method for replacing or reinforcing a construction structure described in claim 4, after the first step, a second step is further included in which a pair of construction structures that are positioned approximately line-symmetrically among the multiple construction structures are simultaneously replaced or reinforced. Therefore, compared to replacing or reinforcing a pair of construction structures after the first step without being influenced by their positional relationship, it is possible to prevent imbalances in the functionality of the multiple construction structures when replacing or reinforcing the construction structures, and it is possible to more quickly replace or reinforce the multiple construction structures while maintaining their functionality.

According to the method for replacing or reinforcing a construction structure described in claim 5, the construction structure includes seismic isolation devices, seismic control devices, pillars, braces, slabs, beams, and/or piles. Therefore, when a pair of seismic isolation devices, seismic control devices, pillars, braces, slabs, beams, and/or piles are replaced or reinforced simultaneously, imbalances in the functionality of multiple seismic isolation devices, etc. can be prevented, and multiple seismic isolation devices, etc. can be quickly replaced or reinforced while maintaining their functionality.

The construction structure replacement/reinforcement method described in claim 6 includes a third step in which sliding bearings are individually replaced without being influenced by their positional relationship with other seismic isolation devices, either approximately point-symmetric or approximately line-symmetric. This allows sliding bearings to be replaced without being influenced by their positional relationship with other seismic isolation devices, making it easier to replace sliding bearings according to the situation.

1 is a plan view (partially shown in cross section) of a floor of a structure according to an embodiment of the present invention, on which a seismic isolation device is installed. 2 is a cross-sectional view taken along the line AA in FIG. 1 (partially omitted). FIG. 2 is a diagram showing a method for replacing and reinforcing a construction structure, showing an area corresponding to FIG. 1 .

The following describes in detail an embodiment of the method for replacing and reinforcing a construction structure according to the present invention, with reference to the accompanying drawings. First, [I] the basic concept of the embodiment will be explained, followed by [II] specific details of the embodiment, and finally, [III] modified examples of the embodiment will be explained. However, the present invention is not limited to the embodiment.

[I] Basic Concept of the Embodiment First, the basic concept of the embodiment will be described. The embodiment generally relates to a replacement/reinforcement method for replacing or reinforcing a plurality of construction structures that are installed on a structure and are capable of bearing at least a horizontal load of the structure.

Here, the specific structure and type of "structure" can be any, but the concept includes, for example, architectural structures such as office buildings, commercial facilities, public facilities, and apartment complexes such as apartment buildings and condominiums, as well as civil engineering structures such as bridges and tunnels. In this embodiment, however, we will describe it as a multi-story office building under construction.

Furthermore, the term "construction structure" refers to a structure installed in a structure, and is a concept that includes, for example, seismic isolation devices, seismic control devices, pillar materials, brace materials, slab materials, beam materials, and/or pile materials. However, in the embodiment, it is described as a seismic isolation device (specifically, laminated rubber bearing) that can withstand the horizontal and vertical loads of a structure.

Also, "replacement" means replacing an existing construction structure with a new construction structure.

Furthermore, "reinforcement" means repairing or correcting defects in a construction structure, preventing or mitigating predicted future defects in a construction structure, or improving the strength of a construction structure. For example, this includes adding new members (such as reinforcing members) to an existing construction structure, or replacing some members (such as defective members) of an existing construction structure with other members.

In the following embodiments, we will explain the case where the replacement/reinforcement method is applied to replacing an existing seismic isolation device installed in a structure with a new seismic isolation device.

[II] Specific Contents of the Embodiment Next, specific contents of the embodiment will be described.

(composition)
First, the configuration of a structure to which the replacement/reinforcement method according to the embodiment is applied will be described.

Figure 1 is a plan view (partially cross-sectional) of a floor of a structure according to an embodiment of the present invention, on which a seismic isolation device is installed. Figure 2 is a cross-sectional view taken along the line A-A in Figure 1 (partially omitted).

In the following explanation, the X direction in Figure 1 will be referred to as the left-right or width direction of the structure (the -X direction will be the left direction of the structure, and the +X direction will be the right direction of the structure), the Y direction in Figure 1 will be referred to as the front-to-back direction of the structure (the +Y direction will be the front direction of the structure, and the -Y direction will be the rear direction of the structure), and the Z direction in Figure 2 will be referred to as the up-down direction of the structure (the +Z direction will be the top direction of the structure, and the -Z direction will be the bottom direction of the structure).

The structure 1 is, for example, a steel-framed (or reinforced concrete) building structure (specifically, a multi-story office building under construction), and as shown in Figures 1 and 2, it comprises flooring 2, columns (not shown), beams 4, wall materials 5, and a seismic isolation device 10.

(Composition - Flooring)
The floor materials 2 constitute the floors of the structure 1, and a plurality of them are arranged side by side in the vertical direction at intervals from each other.

In the following, of the multiple floor materials 2, the floor material 2a in Figure 2 located directly below the seismic isolation device 10 will be referred to as the "foundation floor material 2a."

As shown in FIG. 2, a first structure 6 is provided on the foundation floor material 2a. The first structure 6 is a lower foundation material for installing the seismic isolation devices 10. This first structure 6 is constructed, for example, using a known foundation material (for example, a concrete foundation material), is formed integrally with the foundation floor material 2a, and is provided in portions of the foundation floor material 2a corresponding to each seismic isolation device 10 (i.e., multiple structures are provided on the foundation floor material 2a).

(Structure - pillar material)
The pillars support the floor materials 2, and a plurality of pillars are provided between the floor materials 2 (i.e., in the space between each floor of the structure 1).

(Composition - Beams)
The beams 4 support the floor materials 2, and are provided in multiple positions so as to be able to abut against the underside of each floor material 2, or are provided between floor materials 2 on the same floor.

In the following, where necessary, of the multiple beams 4, the beam 4a in Figure 2 located directly above the seismic isolation device 10 will be referred to as the "upper foundation beam 4a," and the beam 4b in Figure 2 located directly below the seismic isolation device 10 and connected to the foundation floor material 2a will be referred to as the "lower foundation beam 4b."

As shown in Figure 2, a second structure 7 is provided on the upper foundation beam 4a. The second structure 7 is an upper foundation material for installing the seismic isolation devices 10. This second structure 7 is constructed using, for example, a known foundation material (for example, a concrete foundation material), is formed integrally with the upper foundation beam 4a and the column material, and is provided in the portions of the upper foundation beam 4a corresponding to each seismic isolation device 10 (i.e., multiple structures are provided on the upper foundation beam 4a).

(Composition - Wall material)
The wall material 5 is used to separate the floor materials 2 from one another, and a plurality of wall materials 5 are provided between the floor materials 2, etc.

(Configuration - Seismic isolation device)
Returning to Fig. 1, the seismic isolation device 10 is a construction structure that is installed on the structure 1 and can withstand the horizontal and vertical loads of the structure 1, and is a device that prevents earthquake vibrations from being directly transmitted to the structure 1. This seismic isolation device 10 is provided between each of the first frames 6 and each of the second frames 7 (i.e., a plurality of such devices are provided).

Specifically, as shown in Figure 1, multiple rows are provided at intervals in the left-right and front-to-back directions (in Figure 1, there are seven rows in the left-right direction and two to four rows in the front-to-back direction).

As shown in Figure 2, each seismic isolation device 10 includes a seismic isolation device main body 20, an upper flange plate 21a, a lower flange plate 21b, an upper base plate 22a, a lower base plate 22b, and a base portion 23.

In the following, where necessary, of the multiple seismic isolation devices 10, the seismic isolation devices 11a to 11d in the first row from the left in Figure 1 (seismic isolation devices 11a to 11d are arranged in order from front to rear in Figure 1; the same applies to the seismic isolation devices in the other rows) will be referred to as the "first seismic isolation device 11a," "second seismic isolation device 11b," "third seismic isolation device 11c," and "fourth seismic isolation device 11d." Furthermore, the seismic isolation devices 12a to 12c in the second row from the left in Figure 1 will be referred to as the "fifth seismic isolation device 12a," "sixth seismic isolation device 12b," and "seventh seismic isolation device 12c." Furthermore, the seismic isolation devices 13a to 13c in the third row from the left in Figure 1 will be referred to as the "eighth seismic isolation device 13a," "ninth seismic isolation device 13b," and "tenth seismic isolation device 13c." Furthermore, the seismic isolation devices 14a to 14b in the fourth row from the left in FIG. 1 will be referred to as the "eleventh seismic isolation device 14a" and "twelfth seismic isolation device 14b." Furthermore, the seismic isolation devices 15a to 15b in the fifth row from the left in FIG. 1 will be referred to as the "thirteenth seismic isolation device 15a" and "fourteenth seismic isolation device 15b." Furthermore, the seismic isolation devices 16a to 16c in the sixth row from the left in FIG. 1 will be referred to as the "fifteenth seismic isolation device 16a," "sixteenth seismic isolation device 16b," and "seventeenth seismic isolation device 16c." Furthermore, the seismic isolation devices 17a to 17c in the seventh row from the left in FIG. 1 will be referred to as the "eighteenth seismic isolation device 17a," "nineteenth seismic isolation device 17b," and "twentieth seismic isolation device 17c."

(Configuration - Seismic isolation device - Seismic isolation device body)
The seismic isolation device main body 20 is the basic structure of the seismic isolation device 10, and is constructed using, for example, a known seismic isolation laminated rubber bearing (for example, a cylindrical seismic isolation laminated bearing with a diameter of approximately 650 mm).

(Configuration - Seismic isolation device - Upper flange plate, lower flange plate)
The upper flange plate 21a and the lower flange plate 21b are plates attached to the seismic isolation device main body 20. The upper flange plate 21a and the lower flange plate 21b are formed, for example, from a rectangular steel plate (for example, a substantially circular plate with a diameter of about 1000 mm) whose planar dimensions are larger than those of the seismic isolation device main body 20. As shown in Fig. 2, the upper flange plate 21a is attached to the upper end of the seismic isolation device main body 20 by a fastener or the like (not shown), and the lower flange plate 21b is attached to the lower end of the seismic isolation device main body 20 by a fastener or the like (not shown).

(Configuration - Seismic isolation device - Upper base plate, lower base plate)
The upper base plate 22a is a plate for attaching the upper flange plate 21a to the second body 7, and is formed, for example, from a rectangular steel plate (e.g., a substantially circular plate with a diameter of about 1000 mm) whose planar dimensions are approximately the same as those of the upper flange plate 21a, and is attached to the lower end of the second body 7 by a fixing device or the like (not shown) as shown in Figure 2.

The lower base plate 22b is a plate for attaching the lower flange plate 21b to the first body 6, and is formed, for example, from a rectangular steel plate (e.g., a substantially circular plate with a diameter of approximately 1200 mm) whose planar dimensions are larger than those of the lower flange plate 21b. As shown in Figure 2, the lower base plate 22b is attached to the upper end of the first body 6 using fasteners (not shown).

(Configuration - Seismic isolation device - Base)
The base 23 is intended to fill the gap between the lower flange plate 21 b and the lower base plate 22 b, and is formed, for example, from a rectangular concrete plate (e.g., a substantially square plate with sides of about 1000 mm) whose planar dimensions are substantially the same as those of the lower flange plate 21 b, and is provided between the lower flange plate 21 b and the lower base plate 22 b as shown in FIG.

(Configuration - Seismic isolation device - Other configurations)
Furthermore, the method of fixing the seismic isolation device 10 is arbitrary, but in the embodiment, as shown in Figure 2, it is fixed to a mounting hole (not shown) formed in the second body 7 by an upper fixing device 24a (e.g., a bolt with a double eccentric ring, etc.) via insertion holes (not shown) formed in the upper flange plate 21a and the upper base plate 22a, and is fixed to a mounting hole (not shown) formed in the first body 6 by a lower fixing device 24b (e.g., a bolt, etc.) via insertion holes (not shown) formed in the lower flange plate 21b, the lower base plate 22b, and the base portion 23.

(Methods for replacing and reinforcing construction structures)
Next, a method for replacing and reinforcing a construction structure (specifically, a seismic isolation device) will be described.

Figure 3 is a diagram showing a method for replacing or reinforcing a construction structure, and shows the area corresponding to Figure 1. The replacement or reinforcing method according to the embodiment includes a first step and a second step.

(Method for replacing and reinforcing construction structures - Step 1)
First, the first step will be described.

The first step is to simultaneously replace or reinforce a pair of seismic isolation devices 10 that are positioned approximately point-symmetrically among multiple seismic isolation devices 10.

Here, "substantially point-symmetric positional relationship" in the embodiment means a positional relationship in which the position of one of the pair of seismic isolation devices 10 when rotated approximately 180 degrees around the center of gravity CG of the structure 1 (or a position nearby) as the center of rotation approximately coincides with the position of the other of the pair of seismic isolation devices 10.

Specifically, as shown in FIG. 3, among the pairs of seismic isolation devices 10 that are positioned approximately point-symmetrically as described above, there are a pair PG1 of the fourth seismic isolation device 11d and the eighteenth seismic isolation device 17a (hereinafter referred to as the "first point-symmetric group PG1"), a pair PG2 of the first seismic isolation device 11a and the twentieth seismic isolation device 17c (hereinafter referred to as the "second point-symmetric group PG2"), and a pair PG3 of the third seismic isolation device 11c and the fifteenth seismic isolation device 16a (hereinafter referred to as the "fifteenth point-symmetric group PG3"). , referred to as the "third point symmetric group PG3"), the group PG4 of the seventh seismic isolation device 12c and the thirteenth seismic isolation device 15a (hereinafter referred to as the "fourth point symmetric group PG4"), the group PG5 of the second seismic isolation device 11b and the nineteenth seismic isolation device 17b (hereinafter referred to as the "fifth point symmetric group PG5"), and the group PG6 of the fifth seismic isolation device 12a and the seventeenth seismic isolation device 16c (hereinafter referred to as the "sixth point symmetric group PG6") are exchanged.

Furthermore, the method for replacing the first point-symmetric group PG1 to the sixth point-symmetric group PG6 is arbitrary, but in this embodiment, of the pairs of seismic isolation devices 10 that are in the above-mentioned approximately point-symmetric positional relationship, the group that is located farthest from the center of gravity CG of the structure 1 is replaced preferentially.

Specifically, these pairs are exchanged in the following order: first point symmetric pair PG1, second point symmetric pair PG2, third point symmetric pair PG3, fourth point symmetric pair PG4, fifth point symmetric pair PG5, and sixth point symmetric pair PG6.

This makes it possible to prevent imbalances in the functionality of multiple seismic isolation devices 10 when replacing them, compared to when priority is given to replacing the set closest to the center of gravity CG of the structure 1, making it easier to ensure the functionality of multiple seismic isolation devices 10.

However, this is not limiting, and for example, pairs of seismic isolation devices 10 that are positioned approximately point-symmetrically as described above may be exchanged sequentially around an axis whose central axis is the center of gravity CG of the structure 1. As an example, these sets may be exchanged in the order of the third point-symmetric set PG3, the first point-symmetric set PG1, the fourth point-symmetric set PG4, the sixth point-symmetric set PG6, the second point-symmetric set PG2, and the fifth point-symmetric set PG5.

Alternatively, pairs of seismic isolation devices 10 that are positioned approximately point-symmetrically as described above may be replaced sequentially around an axis whose central axis is the center of gravity CG of the structure 1, with priority given to the pair that is farthest from the center of gravity CG of the structure 1. As an example, these pairs may be replaced in the order of the first point-symmetric pair PG1, the fourth point-symmetric pair PG4, the sixth point-symmetric pair PG6, the second point-symmetric pair PG2, the fifth point-symmetric pair PG5, and the third point-symmetric pair PG3.

This allows the replacement work of the seismic isolation device 10 to be carried out efficiently, improving the workability of the replacement work.

Furthermore, the method for replacing each seismic isolation device 10 is arbitrary, but for example, it may be replaced as follows (the same applies to the method for replacing each seismic isolation device 10 in the second step).

That is, first, the upper fixing device 24a and the lower fixing device 24b that secure the existing seismic isolation device 10 are removed. Next, multiple load-receiving parts (e.g., hydraulic jacks, etc.) (not shown) are installed around the existing seismic isolation device 10, and the load-receiving parts are jacked up so that the bearing pressure (i.e., the axial force of the seismic isolation device 10) received by the second structure 7 on the seismic isolation device 10 is zero, thereby supporting the load of the upper foundation beam 4a (specifically, the weight of the upper foundation beam 4a). In this case, the height position of the upper foundation beam 4a is raised by a predetermined amount (e.g., approximately 1 mm), and therefore the height positions of components (e.g., pillars, flooring 2, etc.) directly or indirectly connected to the upper foundation beam 4a are also raised by the same predetermined amount. Next, a cooling unit (e.g., a cooler capable of injecting liquid nitrogen) not shown is used to cool the rubber portion of the existing seismic isolation device 10, thereby reducing the vertical length of the existing seismic isolation device 10. After that, a moving unit (e.g., a chain block, etc.) not shown is used to move the existing seismic isolation device 10 (specifically, the seismic isolation device main body 20, the upper flange plate 21a, and the lower flange plate 21b) from between the first body 6 and the second body 7 to a predetermined position, thereby removing the existing seismic isolation device 10. Next, the moving unit is used to position the new seismic isolation device 10 (specifically, the seismic isolation device main body 20, the upper flange plate 21a, and the lower flange plate 21b) between the first body 6 and the second body 7, and the new seismic isolation device 10 is then fixed to the first body 6 and the second body 7 by the upper fixing device 24a and the lower fixing device 24b. Next, the load-receiving portion is unloaded so that the new seismic isolation device 10 can receive bearing pressure from the second body 7. In this case, the height position of the upper foundation beam 4a is lowered by a predetermined amount (for example, about 1 mm), and the height positions of the components directly or indirectly connected to the upper foundation beam 4a (for example, columns and flooring 2) are also lowered by the same predetermined amount. This allows the height positions of the upper foundation beam 4a and the connected components to be returned to approximately the positions they were in before the existing seismic isolation device 10 was removed. The load-receiving portion is then removed to its predetermined position.

This first step prevents imbalances in the functionality of multiple seismic isolation devices 10 when a pair of seismic isolation devices 10 are replaced simultaneously, making it possible to quickly replace multiple seismic isolation devices 10 while maintaining their functionality.

(Method for replacing and reinforcing construction structures - Step 2)
Next, the second step will be described.

The second step is a step that follows the first step and involves simultaneously replacing or reinforcing a pair of seismic isolation devices 10 that are positioned approximately symmetrically among the multiple seismic isolation devices 10.

Here, "substantially line-symmetrical positional relationship" in this embodiment means a positional relationship in which the position of one of the pair of seismic isolation devices 10 when flipped around the first axis of symmetry AS1 or the second axis of symmetry AS2 in Figure 3 as the rotation axis substantially coincides with the position of the other of the pair of seismic isolation devices 10.

The "first axis of symmetry AS1" is a horizontal axis that overlaps with the center of gravity CG of the structure 1 (or a position nearby), and is described in Figure 3 as a horizontal axis extending in the left-right direction. The "second axis of symmetry AS2" is a horizontal axis that overlaps with the center of gravity CG of the structure 1 (or a position nearby) and is approximately perpendicular to the first axis of symmetry AS1, and is described in Figure 3 as a horizontal axis extending in the front-to-rear direction.

Specifically, as shown in FIG. 3, of the pairs of seismic isolation devices 10 that are positioned approximately axisymmetrically as described above, the following are exchanged: the pair LG1 of the sixth seismic isolation device 12b and the sixteenth seismic isolation device 16b (hereinafter referred to as the "first axisymmetric group LG1"), the pair LG2 of the tenth seismic isolation device 13c and the eleventh seismic isolation device 14a (hereinafter referred to as the "second axisymmetric group LG2"), the pair LG3 of the ninth seismic isolation device 13b and the fourteenth seismic isolation device 15b (hereinafter referred to as the "third axisymmetric group LG3"), and the pair LG4 of the eighth seismic isolation device 13a and the twelfth seismic isolation device 14b (hereinafter referred to as the "fourth axisymmetric group LG4").

Furthermore, the method for replacing the first axisymmetric group LG1 to the fourth axisymmetric group LG4 is arbitrary, but in this embodiment, of the pairs of seismic isolation devices 10 that are in the above-mentioned approximately axisymmetric positional relationship, the pair that is located farthest from the center of gravity CG of the structure 1 is replaced preferentially.

Specifically, these pairs are exchanged in the order of the first axisymmetric pair LG1, the second axisymmetric pair LG2, the third axisymmetric pair LG3, and the fourth axisymmetric pair LG4.

This makes it possible to prevent imbalances in the functionality of multiple seismic isolation devices 10 when replacing them, compared to when priority is given to replacing the set closest to the center of gravity CG of the structure 1, making it easier to ensure the functionality of multiple seismic isolation devices 10.

This second step prevents imbalances in the functionality of multiple seismic isolation devices 10 when they are replaced, compared to replacing a pair of seismic isolation devices 10 after the first step without being influenced by their relative positions. This makes it possible to replace multiple seismic isolation devices 10 more quickly while maintaining their functionality.

(Effects of the embodiment)
According to this embodiment, the method includes a first step of simultaneously replacing a pair of construction structures that are positioned approximately point-symmetrically among the multiple construction structures.This prevents imbalances in the functions of the multiple construction structures when simultaneously replacing a pair of construction structures, and makes it possible to quickly replace the multiple construction structures while maintaining their functions.

In addition, in the first step, of the pairs of construction structures that are positioned approximately point-symmetrically, the pair that is located farthest from the center of gravity CG of structure 1 is replaced preferentially. This makes it possible to prevent imbalances in the functions of multiple construction structures when replacing the construction structures, making it easier to ensure the functions of multiple construction structures, compared to when the pair that is closest to the center of gravity CG of structure 1 is replaced preferentially.

In addition, in the first step, a pair of construction structures that are positioned approximately point-symmetrically are sequentially replaced around an axis whose central axis is the center of gravity CG of the structure 1, which allows the construction structure replacement work to be carried out efficiently and improves the workability of the replacement work.

Furthermore, the method further includes a second step after the first step of simultaneously replacing a pair of construction structures that are positioned approximately line-symmetrically among the multiple construction structures. This prevents imbalances in the functionality of the multiple construction structures when they are replaced, compared to replacing a pair of construction structures after the first step without being influenced by their positional relationship, and makes it possible to more quickly replace the multiple construction structures while maintaining their functionality.

Furthermore, because the construction structure includes seismic isolation devices 10, it is possible to prevent imbalances in the functionality of multiple seismic isolation devices 10 when a pair of seismic isolation devices 10 are replaced simultaneously, making it possible to quickly replace multiple seismic isolation devices 10 while maintaining their functionality.

[III] Modifications to the Embodiments The embodiments of the present invention have been described above, but the specific configurations and means of the present invention can be modified and improved as desired within the scope of the technical ideas of each invention as set forth in the claims. Such modifications will be described below.

(About the problem to be solved and the effects of the invention)
First, the problems that the invention aims to solve and the effects of the invention are not limited to those described above, and the present invention may solve problems that are not described above or achieve effects that are not described above, or may solve only some of the problems that are described or achieve only some of the effects that are described.

(shape, numbers, structure, time series)
The components illustrated in the embodiments and drawings may be modified and improved as desired within the scope of the technical concept of the present invention in terms of shape, numerical value, or the structure or chronological relationship of multiple components.

(About construction structures)
In the above embodiment, the construction structure is described as the seismic isolation device 10 capable of receiving both the horizontal load and the vertical load of the structure 1, but is not limited to this. For example, the construction structure may be a seismic control device (an oil damper, for example) capable of receiving only the horizontal load of the structure 1.

In addition, in the above embodiment, the construction structure was described as the seismic isolation device 10 to be replaced, but this is not limited to this. For example, it may be a structure to be reinforced (for example, a column, brace, slab, beam 4, and/or pile).

In this case, for example, if the construction structure is a pillar, a pair of pillars that are positioned approximately point-symmetrically may be reinforced simultaneously in the first step of the construction structure replacement/reinforcement method (for example, reinforcing members may be attached to the existing pillars and/or some of the existing pillars may be replaced with other members). Furthermore, a pair of pillars that are positioned approximately line-symmetrically may be reinforced simultaneously in the second step of the construction structure replacement/reinforcement method. This replacement/reinforcement method can prevent imbalances in the functionality of multiple pillars when simultaneously reinforcing a pair of pillars, making it possible to quickly reinforce the pillars while maintaining their functionality.

(Regarding seismic isolation devices)
In the above embodiment, the seismic isolation device 10 has been described as including the upper flange plate 21 a, the lower flange plate 21 b, the upper base plate 22 a, the lower base plate 22 b, and the base portion 23, but this is not limitative. For example, either the upper flange plate 21 a or the upper base plate 22 a may be omitted. Alternatively, either one or two of the lower flange plate 21 b, the lower base plate 22 b, or the base portion 23 may be omitted.

(Methods for replacing and reinforcing construction structures)
In the above embodiment, the method for replacing and reinforcing a construction structure has been described as including the first and second steps, but is not limited thereto. For example, if all of the seismic isolation devices 10 to be replaced can be replaced by the first step, the second step may be omitted.

Furthermore, if the multiple seismic isolation devices 10 include at least one sliding bearing, in addition to steps 1 and 2, a third step may be included in which the sliding bearings are individually replaced without being affected by their positional relationship with the other seismic isolation devices 10, which is approximately point-symmetric or approximately line-symmetric. As an example, if the second seismic isolation device 11b and the 19th seismic isolation device 17b of the seismic isolation devices 10 shown in FIG. 1 are sliding bearings, the second seismic isolation device 11b and the 19th seismic isolation device 17b may be individually replaced at the same time or at different times before step 1, after step 1, or after step 2. This third step allows the sliding bearings to be replaced without being affected by their positional relationship with the other seismic isolation devices 10, making it easier to replace the sliding bearings according to the situation.

Furthermore, if there are any seismic isolation devices 10 that have not been replaced even after steps 1 and 2 have been performed, a fourth step may be included in which the seismic isolation device 10 that is located farthest from the center of gravity CG of the structure 1 is replaced preferentially, or the seismic isolation devices 10 are replaced randomly.

Furthermore, in the above embodiment, the method for replacing and reinforcing a construction structure was described as replacing all of the multiple seismic isolation devices 10, but this is not limited to this. For example, it is also possible to replace only some of the multiple seismic isolation devices 10 (as an example, the seismic isolation devices 10 of the first axisymmetric group LG1, the second axisymmetric group LG2, and the third axisymmetric group LG3).

(Regarding the first step)
In the above embodiment, it has been described that in the first step, of a pair of seismic isolation devices 10 positioned in a substantially point-symmetric relationship, the pair farthest from the center of gravity CG of the structure 1 is preferentially replaced, but this is not limiting. For example, the pair closest to the center of gravity CG of the structure 1 may be preferentially replaced, or a pair of seismic isolation devices 10 positioned in a substantially point-symmetric relationship may be replaced randomly (note that the same applies to the second step).

In addition, in the above embodiment, the newly installed seismic isolation device 10 is described as comprising the seismic isolation device main body 20, upper flange plate 21a, and lower flange plate 21b in the first step, but this is not limited to this. For example, from the perspective of improving the ease of installation of the newly installed seismic isolation device 10, it may further comprise a filler (specifically, a filler filled with grout, etc.) for filling the gap between the first body 6 or second body 7 and the newly installed seismic isolation device 10, and a sealing portion for holding the filler in place.

(Additional Note)
The method for replacing or reinforcing a construction structure of Appendix 1 is a method for replacing or reinforcing a plurality of construction structures that are installed on a structure and are capable of bearing at least the horizontal load of the structure, and includes a first step of simultaneously replacing or reinforcing a pair of construction structures that are positioned approximately point-symmetrically among the plurality of construction structures.

The construction structure replacement/reinforcement method of Appendix 2 is the construction structure replacement/reinforcement method described in Appendix 1, in which, in the first step, of the pair of construction structures that are in the approximately point-symmetric positional relationship, the pair that is located farthest from the center of gravity of the structure is preferentially replaced or reinforced.

The construction structure replacement/reinforcement method of Appendix 3 is the construction structure replacement/reinforcement method described in Appendix 1 or 2, in which, in the first step, pairs of construction structures that are positioned approximately point-symmetrically are sequentially replaced or reinforced around an axis whose central axis is the center of gravity of the structure.

The construction structure replacement/reinforcement method of Supplementary Note 4 is a construction structure replacement/reinforcement method described in any one of Supplementary Notes 1 to 3, which further includes, after the first step, a second step of simultaneously replacing or reinforcing a pair of construction structures that are positioned approximately line-symmetrically among the plurality of construction structures.

The construction structure replacement/reinforcement method of Appendix 5 is a construction structure replacement/reinforcement method described in any one of Appendixes 1 to 4, in which the construction structure includes a seismic isolation device, a seismic control device, a column material, a brace material, a slab material, a beam material, and/or a pile material.

The construction structure replacement/reinforcement method of Appendix 6 is the construction structure replacement/reinforcement method described in Appendix 5, wherein the seismic isolation devices include sliding bearings, and includes a third step of individually replacing the sliding bearings without being affected by either the approximately point-symmetric or approximately line-symmetric positional relationship with other seismic isolation devices.

(Effect of supplementary notes)
According to the method for replacing or reinforcing a construction structure described in Appendix 1, a first step is included in which a pair of construction structures among a plurality of construction structures that are positioned approximately point-symmetrically is simultaneously replaced or reinforced. Therefore, when a pair of construction structures is simultaneously replaced or reinforced, imbalances in the functions of the plurality of construction structures can be suppressed, and the plurality of construction structures can be quickly replaced or reinforced while maintaining their functions.

According to the method for replacing or reinforcing a construction structure described in Appendix 2, in the first step, of a pair of construction structures that are positioned approximately point-symmetrically, the pair that is farthest from the center of gravity of the structure is replaced or reinforced preferentially. This makes it possible to prevent imbalances in the functionality of multiple construction structures when replacing or reinforcing them, and makes it easier to ensure the functionality of multiple construction structures, compared to when the pair that is closest to the center of gravity of the structure is replaced or reinforced preferentially.

According to the method for replacing or reinforcing a construction structure described in Appendix 3, in the first step, a pair of construction structures that are positioned approximately point-symmetrically are replaced or reinforced sequentially around an axis whose central axis is the center of gravity of the structure, thereby enabling the replacement or reinforcement work of the construction structure to be carried out efficiently and improving the workability of the replacement or reinforcement work.

The method for replacing or reinforcing a construction structure described in Appendix 4 further includes, after the first step, a second step of simultaneously replacing or reinforcing a pair of construction structures that are positioned approximately line-symmetrically among the multiple construction structures. This makes it possible to prevent imbalances in the functionality of the multiple construction structures when replacing or reinforcing the construction structures, compared to when the pair of construction structures are replaced or reinforced after the first step without being influenced by their positional relationship, and makes it possible to replace or reinforce the multiple construction structures more quickly while maintaining their functionality.

According to the method for replacing or reinforcing a construction structure described in Appendix 5, the construction structure includes seismic isolation devices, seismic control devices, pillars, braces, slabs, beams, and/or piles. Therefore, when a pair of seismic isolation devices, seismic control devices, pillars, braces, slabs, beams, and/or piles are replaced or reinforced simultaneously, imbalances in the functionality of multiple seismic isolation devices, etc. can be prevented, and multiple seismic isolation devices, etc. can be quickly replaced or reinforced while maintaining their functionality.

The construction structure replacement/reinforcement method described in Appendix 6 includes a third step in which sliding bearings are individually replaced without being affected by their positional relationship with other seismic isolation devices, either approximately point-symmetric or approximately line-symmetric. This allows sliding bearings to be replaced without being affected by their positional relationship with other seismic isolation devices, making it easier to replace sliding bearings according to the situation.

REFERENCE SIGNS LIST 1 Structure 2 Floor material 2a Foundation floor material 4 Beam material 4a Upper foundation beam material 4b Lower foundation beam material 5 Wall material 6 First body 7 Second body 10 Seismic isolation device 11a First seismic isolation device 11b Second seismic isolation device 11c Third seismic isolation device 11d Fourth seismic isolation device 12a Fifth seismic isolation device 12b Sixth seismic isolation device 12c Seventh seismic isolation device 13a Eighth seismic isolation device 13b Ninth seismic isolation device 13c Tenth seismic isolation device 14a Eleventh seismic isolation device 14b Twelfth seismic isolation device 15a Thirteenth seismic isolation device 15b Fourteenth seismic isolation device 16a Fifteenth seismic isolation device 16b Sixteenth seismic isolation device 16c Seventeenth seismic isolation device 17a Eighteenth seismic isolation device 17b 19th seismic isolation device 17c 20th seismic isolation device 20 Seismic isolation device body 21a Upper flange plate 21b Lower flange plate 22a Upper base plate 22b Lower base plate 23 Base portion 24a Upper fixing fixture 24b Lower fixing fixture CG Center of gravity LG1 First line symmetrical set LG2 Second line symmetrical set LG3 Third line symmetrical set LG4 Fourth line symmetrical set PG1 First point symmetrical set PG2 Second point symmetrical set PG3 Third point symmetrical set PG4 Fourth point symmetrical set PG5 Fifth point symmetrical set PG6 Sixth point symmetrical set

Claims (6)

A replacement/reinforcement method for replacing or reinforcing a plurality of construction structures that are installed on a structure and are capable of bearing at least a horizontal load of the structure, comprising:
A first step of simultaneously replacing or reinforcing a pair of construction structures that are positioned approximately point-symmetrically among the plurality of construction structures ,
The center of the approximate point symmetry is the center of gravity of the structure or a position near the center of gravity.
How to replace or reinforce construction structures. In the first step, of the pair of construction structures that are in a positional relationship of approximately point symmetry, the pair that is located farthest from the center of gravity of the structure is preferentially replaced or reinforced.
The method for replacing or reinforcing a construction structure according to claim 1. In the first step, the pair of construction structures in the substantially point-symmetrical positional relationship are sequentially replaced or reinforced around an axis having the center of gravity of the structure as a central axis.
The method for replacing or reinforcing a construction structure according to claim 1 or 2. The method further includes, after the first step, a second step of simultaneously replacing or reinforcing a pair of construction structures that are in a substantially line-symmetrical positional relationship among the plurality of construction structures.
The method for replacing or reinforcing a construction structure according to any one of claims 1 to 3. The construction structure includes a seismic isolation device, a seismic control device, a column material, a brace material, a slab material, a beam material, and/or a pile material.
The method for replacing or reinforcing a construction structure according to any one of claims 1 to 4. The seismic isolation device includes a sliding bearing,
and a third step of individually replacing the sliding bearings without being affected by the positional relationship of the sliding bearings with other seismic isolation devices that is approximately point symmetric or line symmetric.
The method for replacing or reinforcing a construction structure according to claim 5.