JP2012112152A - Structure bearing device, structure, and structure rebuilding method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure habitability of an upper structure and to prevent destruction of a lower structure.SOLUTION: Lower and upper structures 14 and 16 are connected to a pin bearing portion 22 that is provided between the lower and upper structures 14 and 16 and that transfers an axial load of the upper structure 16 to the lower structure 14. A structure bearing device comprises a shear pin 50 that makes the upper structure 16 turnable around the pin bearing portion 22 by releasing a connected state when a horizontal force equal to or greater than a preset horizontal force acts on the upper structure 16.

Description

  The present invention relates to a structure support device, a structure, and a rebuilding method of the structure.

  When building an upper structure on top of an existing underground structure, there is an upper limit on the bending moment and shear force that the underground structure can withstand, so it is necessary to construct an upper structure that matches the strength of the underground structure. There is.

  Also, as a method of constructing an upper structure that exceeds the yield strength of the underground structure, as shown in Patent Document 1, the axial load of the upper structure is transmitted to the underground structure between the underground structure and the upper structure. In addition, there is a method of providing a pin support device that does not transmit the bending moment from the upper structure to the underground structure.

JP 2006-118170 A

  However, in the method shown in Patent Document 1, since the bending moment is not transmitted to the underground structure, a large rigidity is required for the upper structure, and the comfortability of the upper structure is deteriorated due to the vibration caused by the slight vibration or the wind load at all times. .

  In view of the above facts, the present invention aims to ensure the habitability of the upper structure and prevent the lower structure from being destroyed.

  According to a first aspect of the present invention, there is provided a pin support portion that is provided between the lower structure and the upper structure, and transmits an axial load of the upper structure to the lower structure, and the lower structure and the upper structure. And a connecting member that releases the connected state when a horizontal force greater than a preset horizontal force acts on the upper structure, and allows the upper structure to rotate around the pin support portion. It is a body support device.

According to the first aspect of the present invention, when a horizontal force equal to or higher than a preset horizontal force acts on the upper structure and the connection state of the connecting member is released, the upper structure rotates around the pin support portion. As a result, a bending moment is not transmitted from the upper structure to the lower structure. Conversely, the connecting member connects the lower structure and the upper structure until a horizontal force equal to or greater than a preset horizontal force acts on the upper structure. For this reason, a bending moment is transmitted from the upper structure to the lower structure, and the upper structure does not rotate around the pin support portion, so that vibration of the upper structure is suppressed. Moreover, even if a horizontal force equal to or higher than a preset horizontal force acts on the upper structure, the lower structure does not cause brittle fracture.
Furthermore, a large-scale upper structure can be constructed as compared with the method of rigidly connecting the upper structure and the lower structure from the beginning.

  In the invention of the second aspect, the preset horizontal force is calculated based on a bending moment that the lower structure can withstand, and the connecting member has a horizontal force equal to or higher than the preset horizontal force. This is a structure support device that is a breaking pin that shears and breaks when acting on a structure.

  According to the invention described in the second aspect, when a horizontal force equal to or greater than the horizontal force calculated and set based on the bending moment that the lower structure can withstand is applied to the upper structure, the breaking pin is shear-ruptured, The connected state of the connecting member is released. Therefore, before the bending moment that the lower structure can withstand is transmitted from the upper structure, the transmission of the bending moment is suppressed, so that the lower structure does not undergo brittle fracture. Moreover, after the connection state of the connection member is released, the lower structure only has to bear the axial load of the upper structure.

  Furthermore, even if a horizontal force less than the horizontal force calculated and set based on the bending moment that the lower structure can withstand is applied, the fracture pin does not shear and the lower structure and the upper structure are Since it is in a connected state, it is possible to suppress shaking of the upper structure. Therefore, the habitability of the upper structure is not deteriorated by the vibration caused by the slight vibration, the slight earthquake or the wind load.

  According to a third aspect of the present invention, the pin support portion is rotatable by engaging an arc-shaped convex portion provided on a column upper portion of the lower structure and a convex portion provided on a column lower portion of the upper structure. And the connecting member is a structure support device that crosses a mating surface of the convex portion and the concave portion.

  According to the invention described in the third aspect, the lower structure and the upper structure can be easily connected as compared with the configuration in which the connecting member is provided at another location.

  The invention of a fourth aspect is provided with a lower structure constructed underground, an upper structure constructed on the lower structure, and between the lower structure and the upper structure, A pin support portion that transmits a body axial load to the lower structure, and the lower structure and the upper structure are connected to each other. When a horizontal force that is greater than a preset horizontal force acts on the upper structure, the connected state And a connecting member that allows the upper structure to rotate about the pin support, and a connection member that is provided on the upper structure and is released from the connection state by the connecting member, and then before the lower structure. And a fragile part that leads to fragile destruction.

  According to the invention described in the fourth aspect, the collapse mechanism of the lower structure already built underground is unknown, but the upper structure built on the lower structure is the new structure. Therefore, the collapse mechanism is clear. Therefore, by adopting the configuration of the fourth aspect, after a horizontal force greater than a preset horizontal force acts on the upper structure, the upper structure with a clear collapse mechanism breaks down before the lower structure. As a result, the entire structure collapses. For this reason, collapse of the whole structure can be predicted in advance, and the safety of the structure can be ensured.

  The invention of the fifth aspect includes a step of dismantling the upper structure built on the lower structure, and the structure according to any one of the first to third aspects on the lower structure. It is a rebuilding method of a structure including a step of providing a body support device and a step of constructing a new upper structure on the lower structure via the structure support device.

  According to the fifth aspect of the invention, even if a new upper structure is constructed on the existing lower structure, the structure support device is provided between them, so that the existing lower structure is excessively destroyed. It is possible to prevent the bending moment from being transmitted from the upper structure to the lower structure. Therefore, the soundness of the lower structure can be maintained even after the upper structure is reconstructed.

  According to the present invention, the habitability of the upper structure can be ensured and the lower structure can be prevented from being destroyed.

It is a figure showing the structure concerning a 1st embodiment of the present invention. It is a longitudinal cross-sectional view of the structure support apparatus which concerns on 1st Embodiment of this invention. It is a cross-sectional top view of the structure support apparatus which follows the AA line of FIG. It is a figure explaining the effect | action of the structure support apparatus which concerns on 1st Embodiment of this invention, Comprising: It is a cross-sectional perspective view of the structure support apparatus immediately after the predetermined horizontal force P2 acted on the upper structure. It is a figure explaining the collapse process of the structure concerning a 1st embodiment of the present invention. It is a longitudinal cross-sectional enlarged view of the structure support apparatus which concerns on 2nd Embodiment of this invention. It is a figure explaining the effect | action of the structure support apparatus which concerns on 2nd Embodiment of this invention, Comprising: (A) shows the structure support apparatus of the moment when the horizontal force more than the shear strength of a shear pin acted on the upper structure. (B) is a cross-sectional perspective view of the structure support device immediately after a predetermined horizontal force is applied to the upper structure.

  Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings. In addition, what has the substantially same function is attached | subjected and demonstrated through the whole figure, and the description may be abbreviate | omitted depending on the case.

<First Embodiment>
FIG. 1 is a diagram showing a structure according to a first embodiment of the present invention.

(overall structure)
In the structure 10 according to the first embodiment of the present invention, a lower structure 14 is provided in the basement 12. The lower structure 14 is an existing structure, and has a plurality of pillars 14A and spaces 14B, and is constructed as, for example, a substation or a residence.

  An upper structure 16 is constructed on the lower structure 14. The upper structure 16 is a new steel pure ramen structure in which a column member 16A and a beam member 16B are rigidly joined. A wall panel (not shown) is attached to at least one member of the column member 16A and the beam member 16B of the ramen structure, and the upper structure 16 is used as a residential building, for example.

  The upper structure 16 is supported on the lower structure 14 via a plurality of structure support devices 20.

(Configuration of structure support device)
FIG. 2 is a longitudinal sectional view of the structure support device 20 according to the first embodiment of the present invention. FIG. 3 is a cross-sectional plan view of the structure support device 20 along the line AA in FIG.

  The structure support device 20 according to the first embodiment of the present invention is provided between the lower structure 14 and the upper structure 16 and transmits the axial load of the upper structure 16 to the lower structure 14. have.

  The pin support portion 22 includes a lower collar 24 attached to the lower structure 14, an upper collar 26 attached to the upper structure 16, a hemispherical support projection 28 formed on the upper surface portion of the lower collar 24, It is formed on a lower surface portion of the upper collar 26, and includes a support recess 30 having a shape corresponding to the support protrusion 28, and an annular engagement body 32 that prevents the upper collar 26 from being lifted.

  Specifically, the lower rod 24 is a metal (for example, steel) disk, and is fixed to the upper surface portion 14C of the lower structure 14. At the center of the upper surface of the lower collar 24, a support convex portion 28 having a surface with a hemispherical surface having the same radius of curvature as the surface of the support concave portion 30 is formed. The support convex portion 28 is integrally formed with the lower collar 24 or is separated from the lower collar 24 and is fixed to the upper surface of the lower collar 24 by a fixing tool or by welding as appropriate. An opening 28 </ b> A into which a later-described shear pin 50 can be inserted is formed at the center of the support projection 28. The shape of the opening 28 </ b> A is a circular shape centered on a point on the vertical line L that passes through the rotation center C of the support recess 30, and has a diameter substantially the same as the diameter of the shear pin 50.

  A bearing recess 30 at the center of the lower surface of the upper collar 26 is engaged with the bearing projection 28 so as to be rotatable about the rotation center O from above. The shape of the support recess 30 is such that when the lower rod 24 and the upper rod 26 are rotated by relative rotation between the lower rod 24 and the upper rod 26 due to seismic force or the like, the lower rod 24 and the upper rod 26 interfere with each other. The gap S1 is formed so as not to occur.

  The upper rod 26 is a metal block having a circular horizontal cross section, and is fixed to the lower surface portion 16C of the column member 16A of the upper structure 16 by a plurality of bolts 34. An opening 26A having the same shape as the opening 28A is formed in the central portion of the upper collar 26 so as to communicate with the opening 28A formed in the support protrusion 28. The opening 26A is formed in the lower surface portion 16C of the column member 16A and communicates with the opening 16D having the same shape as the opening 28A.

  An engaging projection 36 is integrally formed on the outer periphery of the lower end of the upper collar 26. The engagement protrusion 36 is formed in an annular shape that is concentric with the support protrusion 28 and the support recess 30, and the engagement body 32 is engaged with the engagement protrusion 36 in a direction that prevents the upper collar 26 from being lifted. Is done.

  The engaging body 32 is a metal ring comprising an annular main body portion 38 and an annular engaging portion 40 projecting inwardly from the inner periphery of the upper end thereof, and includes a support convex portion 28, a support concave portion 30, and an engagement portion. It is concentric with the mating protrusion 36 and is attached to the upper surface portion of the lower collar 24 in a state where the lower surface of the engaging portion 40 is in close proximity to the upper surface of the engaging protrusion 36. The engagement body 32 is attached to the lower collar 24 by screwing a plurality of bolts 42 inserted through the main body portion 38 into the lower collar 24. As shown in FIG. 3, the plurality of bolts 42 are arranged in parallel at equal intervals in an annular region around the vertical line L that passes through the rotation center C of the support recess 30. A seal member 44 that seals the gap between the engagement body 32 and the upper collar 26 is provided to prevent foreign matter from entering between the engagement protrusion 36 and the engagement portion 40. ing.

  The pin support portion 22 as described above is provided with a cylindrical shear pin 50 constituting the structure support device 20 according to the first embodiment of the present invention.

  The shear pin 50 connects the lower structure 14 and the upper structure 16, and when a horizontal force higher than a preset horizontal force acts on the upper structure 16, the shear pin breaks and the connected state is released. It can be rotated around the pin support portion 22.

  Specifically, the shear pin 50 is inserted into the opening 16D in the lower surface portion 16C of the column member 16A, the opening 28A of the lower collar 28 in the pin support section 22 and the opening 26A of the upper collar 26, and the support convex section 28. And crossing the mating surface of the support recess 30. Thereby, the lower rod 24 and the upper rod 26 are fixed, and the lower structure 14 and the upper structure 16 are connected. Note that the lower end portion of the shear pin 50 is in contact with the lower rod 24, and the upper end portion protrudes toward the upper structure 16 side.

  The horizontal force at which the shear pin 50 shears and breaks (shear strength) is set in advance so that a bending moment greater than the bending moment that the lower structure 14 can withstand is not transmitted to the lower structure 14. In addition, the shear strength of the shear pin 50 is set to be high enough to prevent shear fracture even when a horizontal force caused by a slight vibration, a slight earthquake, or a wind load is constantly applied to the upper structure 16. The shear strength of the shear pin 50 can be set by selecting a cross-sectional area of the shear pin 50 and a material. Further, the bending moment that can be withstood by the lower structure 14 can be calculated by simulation based on the design drawing of the lower structure 14 or the like. The value of the shear strength of the shear pin 50 is not particularly limited as long as it meets the above purpose.

  The shear pin 50 may be made of any material having rigidity, and preferably has high rigidity. For example, high-strength steel such as SNCM439 and SCM440 can be reduced in weight because it has a small cross-section for realizing a predetermined breaking strength. Therefore, it is suitable as a material for the shear pin 50.

(Operation and effect of the first embodiment)
In the configuration as described above, a case is assumed in which the horizontal force P1 is applied to the upper structure 16 due to, for example, a constant vibration, a slight earthquake, or a wind load (see FIG. 2).

  In this case, since the shear strength of the shear pin 50 is set to be higher than the horizontal force P1, the shear pin 50 is not sheared, the lower rod 24 and the upper rod 26 are fixed, and the lower structure 14 and the upper structure 16 are rigidly fixed. Therefore, the upper structure 16 can be prevented from shaking. Therefore, the habitability of the upper structure 16 is not deteriorated by the vibration caused by the slight vibration, the slight earthquake, or the wind load.

  Next, as shown in FIG. 4, it is assumed that a horizontal force P <b> 2 that is greater than the shear strength of the shear pin 50 set in advance based on the strength of the lower structure 14 acts on the upper structure 16.

  In this case, the shear pin 50 is sheared and broken by the horizontal force P2, and the connection state between the lower structure 14 and the upper structure 16 by the shear pin 50 is released, and the support recess 30 rotates around the rotation center O, that is, the upper structure. The body 16 rotates around the pin support 22. Therefore, since the transmission of the bending moment is suppressed before the bending moment that the lower structure 14 can withstand is transmitted from the upper structure 16, the lower structure 14 does not undergo brittle fracture.

  Since the lower structure 14 does not break down, the upper structure 16 having a large scale can be constructed as compared with the method of rigidly connecting the upper structure 16 and the lower structure 14 from the beginning. Further, the lower structure 14 need not be reinforced for this construction. In particular, in the first embodiment, since the lower structure 14 is constructed in the basement 12 and the reinforcement work is difficult, the upper structure 16 having a large scale is formed without reinforcing the lower structure 14. It is effective to be able to construct.

In the first embodiment, since the lower structure 14 is an existing structure, its collapse mechanism is unknown, but since the upper structure 16 is a new structure, the collapse mechanism is clear.
Therefore, the upper structure 16 is connected to the structure support device 20 of the first embodiment by the column member 16A (fragile portion) that reaches the fragile fracture before the lower structure 14 after the connection state by the shear pin 50 is released. It is connected. For this reason, after a horizontal force P2 equal to or greater than a preset horizontal force is applied to the upper structure 16, the upper structure 16 having a clear collapse mechanism breaks before the lower structure 14 as shown in FIG. As a result, the entire structure 10 collapses. Therefore, the collapse of the entire structure 10 can be predicted in advance, and the safety of the structure 10 can be ensured.

  The structure 10 having the above-described configuration disassembles an existing upper structure (not shown) constructed on the lower structure 14, and a structure support device on the lower structure 14. 20 is provided, and it can be constructed through a rebuilding process for constructing a new upper structure 16 on the lower structure 14 via the structure support device 20.

  Through such a rebuilding process, even if a new upper structure 16 is constructed on the existing lower structure 14, the structure support device 20 is provided between them, so that the existing lower structure 14 is It is possible to prevent an excessive bending moment that causes destruction from being transmitted from the upper structure 16 to the lower structure 14. Therefore, the soundness of the lower structure 14 can be maintained even after the upper structure 16 is reconstructed.

Second Embodiment
Next, the structure support apparatus which concerns on 2nd Embodiment of this invention is demonstrated. In the description of the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals and will be appropriately omitted.

(Configuration of structure support device)
FIG. 6 is an enlarged vertical cross-sectional view of a structure support device according to a second embodiment of the present invention.

  A structure support device 100 according to the second embodiment of the present invention is configured by a pin support portion 102 and a shear pin 104.

  In the pin support portion 102, the opening 106A of the lower collar 106 into which the shear pin 104 is inserted penetrates to the lower structure 14 side, is formed on the upper surface portion 14D of the lower structure 14, and has the same shape as the opening 106A. It communicates with the through hole 108. In addition, a circular recess 112 is provided at the center of the support protrusion 110 of the lower collar 106, and a gap S <b> 2 is formed between the support protrusion 110 and the upper collar 26.

  The upper end portion of the shear pin 104 is provided with a flange portion 104A that protrudes along the circumferential direction to prevent the shear pin 104 from falling out from the through hole 108 toward the lower structure 14 side. Also, a notch 104B is formed along the circumferential direction at the boundary between the lower collar 106 and the upper collar 26 of the shear pin 104, and when the predetermined shearing force (horizontal force) is applied, the notch 104B. The shear pin 104 is ruptured at the position where is formed. Further, the shear pin 104 is set high enough not to be sheared or broken even when a horizontal force is always applied to the upper structure 16 due to a slight vibration, a slight earthquake, or a wind load.

(Operation and effect of the second embodiment)
In the configuration as described above, it is assumed that the horizontal force P3 is applied to the upper structure 16 due to, for example, microvibration, slight earthquake or wind load (see FIG. 6).

  In this case, since the shear strength of the shear pin 104 is set to be higher than the horizontal force P3, the shear rupture does not break, the lower ridge 106 and the upper ridge 26 are fixed, and the lower structure 14 and the upper structure 16 are rigidly fixed. Therefore, the upper structure 16 can be prevented from shaking. Therefore, the habitability of the upper structure 16 is not deteriorated by the vibration caused by the slight vibration, the slight earthquake, or the wind load.

  Next, it is assumed that a horizontal force equal to or greater than the shear strength of the shear pin 104 set in advance based on the yield strength of the lower structure 14 acts on the upper structure 16.

  FIG. 7 is a diagram for explaining the operation of the structural body support device 100 according to the second embodiment of the present invention. FIG. 7A shows that the horizontal force P4 equal to or greater than the shear strength of the shear pin 104 is applied to the upper structural body 16. FIG. 7B is a cross-sectional perspective view of the structure supporting apparatus 100 immediately after a predetermined horizontal force P4 is applied to the upper structure 16.

  As shown in FIG. 7, when the horizontal force P4 acts on the upper structure 16, the shear pin 104 shears and breaks at the position where the notch 104B is formed by the horizontal force P4 (see FIG. 7A). The connection state of the lower structure 14 and the upper structure 16 by the shear pin 104 is released, and the support recess 30 rotates around the support projection 110, that is, the upper structure 16 rotates around the pin support 102 (FIG. 7 ( B)). Therefore, since the transmission of the bending moment is suppressed before the bending moment that the lower structure 14 can withstand is transmitted from the upper structure 16, the lower structure 14 does not undergo brittle fracture.

  Here, in the second embodiment of the present invention, since the shear pin 104 is broken at the position where the notch 104B is formed, the connection state between the lower structure 14 and the upper structure 16 can be reliably released. The upper structure 16 can be smoothly rotated around the pin support portion 102.

  Then, the lower portion 104C of the shear pin 104 broken at the notch 104B falls out to the lower structure 14 side through the opening 106A and the through hole 108 (see FIG. 7B). For this reason, the fractured uneven surface 104D of the lower portion 104C of the fractured shear pin 104 does not interfere with the rotation of the support recess 30. Similarly, since the gap S2 is formed between the support convex portion 110 and the upper collar 26, the fractured uneven surface 104F of the upper portion 104E of the fractured shear pin 104 does not hinder the rotation of the support concave portion 30.

<Modification>
The present invention is not limited to the above-described embodiment, and various modifications, changes, and improvements can be made without departing from the gist of the present invention.

  For example, in the first embodiment, the case where the upper structure 16 is made of a steel framed ramen structure has been described. The present invention can be applied even when the structure has various structures and scales such as a mixed structure thereof. Moreover, the building after attaching a wall member to these ramen structures etc. may be sufficient.

  Further, the configuration in which the plurality of structure support devices 20 between the upper structure 16 and the lower structure 14 are all provided with the shear pins 50 has been described. However, some of the structure support devices 20 are provided with the shear pins 50. Anyway. Conversely, a plurality of shear pins 50 may be provided in one structure support device 20.

  Furthermore, the case where the shear pins 50 and 104 are provided in the structure support devices 20 and 100 so as to be positioned at the center of the support convex portions 28 and 110 has been described, but the positions of the shear pins 50 and 104 are particularly limited. For example, the shear pin 50 may be disposed around the support convex portion 28 so as to connect the engagement protrusion 36 of the upper collar 26 and the lower collar 24.

  Furthermore, a gap such as the gap S2 of the second embodiment may be provided around the shear fracture of the shear pin 50 according to the first embodiment. Further, the case where the openings 16D, 26A, 28A, 106A and the through-hole 108 have substantially the same diameter as the diameter of the shear pins 50, 104 has been described, but the diameter is larger than the diameter of the shear pins 50, 104. May be. In particular, in the second embodiment, if the diameter of the opening 106A and the through hole 108 is made larger than the diameter of the shear pin 104, the lower portion 104C of the broken shear pin 104 becomes the lower structure 14 side as shown in FIG. It becomes easy to fall into.

  Further, the case where the shear pin 50 is only fixed to the lower collar 24 but not fixed has been described. For example, a male screw portion is provided at the lower end portion of the shear pin 50 and a female screw portion is provided at the lower collar 24, so that the shear pin 50 is provided. The lower pin 24 may be screwed into the female screw portion, and the shear pin 50 and the lower rod 24 may be fixed.

  Further, the connecting member that connects the lower structure 14 and the upper structure 16 is not limited to the shear pins 50 and 104, and the connection state is released when a horizontal force that is higher than a preset horizontal force acts on the upper structure 16. As long as the upper structure 16 can be rotated, a screw, a stopper, a rod, or the like may be used.

  Furthermore, although the case where the upper structure 16 is a new structure has been described, the present invention can be applied even to an existing structure. Similarly, although the case where the lower structure 14 is an existing structure has been described, the present invention can be applied even to a new structure. Moreover, although the case where the lower structure 14 was provided in the underground 12 was demonstrated, you may make it provide on the ground.

  Further, the configuration of the pin support portions 22 and 102 is not particularly limited. For example, a support recess may be provided in the lower rod 24, and a support protrusion may be provided in the upper rod 26. The shape of 26 may be rectangular or triangular.

DESCRIPTION OF SYMBOLS 10 Structure 12 Basement 14 Lower structure 16 Upper structure 16A Column material (fragile part)
20,100 Structure support device 22,102 Pin support portion 28,110 Support convex portion (convex portion)
30 Bearing recess (recess)
50,104 Shear pin (connecting member, breaking pin)

Claims (5)

A pin support portion provided between the lower structure and the upper structure, for transmitting the axial load of the upper structure to the lower structure;
The lower structure and the upper structure are connected, and when a horizontal force greater than a preset horizontal force acts on the upper structure, the connected state is released and the upper structure is rotated around the pin support portion. A connecting member to enable;
A structure bearing device having The preset horizontal force is calculated based on a bending moment that the lower structure can withstand,
2. The structure support device according to claim 1, wherein the connecting member is a breaking pin that shears and breaks when a horizontal force greater than the preset horizontal force acts on the upper structure. 3. The pin support is
An arc-shaped convex portion provided on the upper portion of the column of the lower structure, and a concave portion provided on the lower portion of the column of the upper structure and engaged with the convex portion and rotatable.
The structure support device according to claim 1, wherein the connecting member crosses a mating surface of the convex portion and the concave portion. A substructure built underground,
An upper structure built on the lower structure;
A pin support portion provided between the lower structure and the upper structure, for transmitting an axial load of the upper structure to the lower structure;
The lower structure and the upper structure are connected, and when a horizontal force greater than a preset horizontal force acts on the upper structure, the connected state is released and the upper structure is rotated around the pin support portion. A connecting member to enable;
A fragile part that is provided in the upper structure, and after the connected state by the connecting member is released, reaches a fragile fracture before the lower structure,
A structure having Dismantling the upper structure built on the lower structure;
A step of providing the structure support device according to any one of claims 1 to 3 on the lower structure;
Building a new upper structure on the lower structure via the structure support device;
Reconstruction method of structure having

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