JP4658006B2 - Seismic isolation method for existing buildings and temporary seismic control panel - Google Patents

Description

  The present invention relates to a seismic isolation method for an existing building and a temporary seismic control panel used in the existing building that can safely perform seismic isolation while maintaining the use environment of the existing building.

  Patent Document 1 is known as a seismic isolation method for an existing building. The “Seismic Isolation Method” in Patent Document 1 is a seismic isolation method for seismic isolation by installing a seismic isolation device in an existing building, and each of a predetermined number of columns among a plurality of columns in an existing building. In addition, the weight of the existing building borne by the pillar is received by a temporary material, the pillar is cut and a seismic isolation device is installed at the cut location, and then the existing building borne by the column is installed in the seismic isolation device installed. By transferring the weight from the temporary material and repeatedly removing the temporary material, seismic isolation devices are sequentially installed on all of the plurality of pillars and the temporary material is sequentially removed. In addition, during the process of installing seismic isolation devices for all of these pillars and removing temporary materials in sequence, prior to transferring the weight of the existing building from the temporary materials to each seismic isolation device Order the individual horizontal displacement restraining means around each seismic isolation device. By going installed by individual by horizontal displacement restraining means, so as to restrain the horizontal displacement of the upper portion than places to install a seismic isolation device of an existing building.

In addition, a method of restraining horizontal displacement more reliably by providing a compression brace or a panel-like restraining material as shown in Patent Document 2 between existing columns is also known.
Japanese Patent No. 3760306 JP 2005-36525 A

  According to Patent Document 1, “in the process of installing seismic isolation devices sequentially and removing temporary materials sequentially, prior to transferring the weight of the existing building from the temporary materials to each seismic isolation device. The individual horizontal displacement restraint means are sequentially installed around each seismic isolation device. With this procedure, unless a special restraining member is used, the weight of the existing building is transferred to the seismic isolation device, so that it is clear to the individual horizontal displacement restraining means to be installed before that. A load will be applied. For this reason, initial strain and initial stress are generated in the individual horizontal displacement restraining means. If the seismic isolation device sinks due to the transfer of the weight of the existing building, the initial strain and initial stress generated in the individual horizontal displacement restraining means will be even greater. In this way, the individual horizontal displacement restraining means that is attached from before the weight transfer and causes initial strain or the like due to the transfer cannot exhibit the restraint performance according to the design value, and functions as a safety device. There was a problem that there was a risk that it could not be fulfilled sufficiently. Also, when the individual horizontal displacement restraint means is attached with bolts, etc., it becomes difficult to remove at the time of removal due to load or strain, and movement is allowed if a long hole is taken into account in consideration of sinking in advance. Therefore, the safety device is not used, and it is necessary to fix it again.

  In addition, in the method in which the braces are inserted between the existing columns, the horizontal force is concentrated on the braces because the brace has higher rigidity in the horizontal direction than the columns. For this reason, it is necessary to increase the number of brace installation locations or to increase the cross-sectional area of the brace member. Furthermore, since the length of the brace varies depending on the distance between the existing columns and the length between the beams of the existing columns, it is difficult to divert the brace material, and it is necessary to prepare a new brace material for each construction. These cause an increase in construction costs. In addition, since the opening between the columns cannot be used due to the braces, there is a disadvantage that the environment of use is greatly restricted when the building is used for seismic isolation.

  Although the panel-like constraining material in Patent Document 2 can be diverted, the beam material component crosses the lower part of the opening between the columns, so the use environment is restricted when seismic isolation is performed while using an existing building Inconvenience occurs.

  The present invention was devised in view of the above-described conventional problems, and can ensure safety during construction without significantly increasing construction costs, and can be seismically isolated without significantly impairing the use environment of existing buildings. The purpose is to provide a seismic isolation method for existing buildings and a temporary seismic control panel that can be used.

The temporary seismic control panel used for the seismic isolation method of the existing building according to the present invention transfers the column load from the pillar on the predetermined floor of the existing building to the temporary support material arranged around the pillar, This is used in the seismic isolation method of existing buildings where the seismic isolation device is inserted and installed by cutting and removing the middle part of the building before cutting the column burden load from the column to be cut to the temporary support material. Temporary seismic control panel that is installed between the beam on the floor where the pillar is located and the beam on the lower floor, and absorbs vibration energy in the horizontal direction, and is detachable from the beam on the floor where the pillar to be cut is located An upper panel, a lower panel that can be attached to and detached from the beam on the lower floor directly below the beam to which the upper panel is attached, and a lower strength than the upper and lower panels, and is attached between the upper and lower panels. It consists of an intermediate panel and each panel It is composed of a plate material and a steel flange provided on the peripheral edge thereof, and the upper panel, the intermediate panel, and the intermediate panel and the lower panel are made stronger than the steel plate material of these panels. It is characterized by being connected by being clamped with a bolt sandwiched between splice plates having high rigidity.

The intermediate panel is formed thinner than the upper and lower panels.

A decorative material is applied to the front and back surfaces of the temporary seismic control panel.

  Using the above-mentioned temporary seismic control panel used in the seismic isolation method for an existing building, the temporary support material disposed around the pillar from one to a plurality of pillars on a predetermined floor of the existing building After transferring the column load, cutting and removing the middle part of the column and inserting and installing the seismic isolation device, the column load is transferred from the temporary support material to the seismic isolation device, and then the temporary support material is This is a seismic isolation method for an existing building that will be completed in order to remove all of the pillars on the same floor in sequence or as many as necessary, and transfer the column load from the pillar to be cut to the temporary support material. Before installing the temporary seismic control panel between the beam on the floor where the pillar to be cut is located and the beam on the lower floor, and the column load from the temporary support material to the seismic isolation device After the transfer, the restraining means for attaching the restraining means for restraining the horizontal displacement of the seismic isolation device is provided. A step, after removing the above temporary support with completing the restraining means mounting step, characterized by comprising a panel removal step of removing the temporary seismic control panel.

  The temporary seismic control panel is installed at an intermediate position between any one of a pair of columns on the floor where the column is located, and is appropriately spaced from the pair of columns.

  The seismic isolation method for an existing building according to the present invention and the temporary seismic control panel used therein can ensure safety during construction without significantly increasing the construction cost, and the environment of use of the existing building The seismic isolation work can be done without significantly damaging.

  Hereinafter, a preferred embodiment of an existing building seismic isolation method according to the present invention and a temporary seismic control panel used for the method will be described in detail with reference to the accompanying drawings. The seismic isolation method for an existing building according to the present embodiment is basically applied to the temporary support material 2 disposed around the pillar 1 to the pillar 1 on the predetermined floor of the existing building as shown in FIGS. After the column load is transferred, the middle part 3 of the column 1 is cut and removed, and the seismic isolation device 4 is inserted and installed, and then the column 1 inserted with the seismic isolation device 4 from the temporary support material 2 and the seismic isolation device are installed. Seismic isolation of existing buildings, where the column load is transferred to the seismic device 4 and then the temporary support material 2 is removed, one by one or all of the columns 1 on the same floor. In the chemical method, before transferring the column load from the column 1 to be cut to the temporary support member 2, the vibration energy in the horizontal direction is absorbed between the beam 5 on the lower floor and the beam 6 on the floor where the column is located. The panel installation process for attaching the temporary seismic control panel 7, and the seismic isolation device 4 is inserted and installed from the temporary support material 2. After transferring the column burden load to the column 1 and the seismic isolation device 4, the restraining means installation step for attaching the restraining means 8 for restraining the horizontal displacement of the seismic isolation device 4 and the restraining means installation step are completed. A seismic isolation method for an existing building comprising a panel removal step of removing the temporary seismic control panel 7 after removing the temporary support material 2.

  More specifically, the first step of installing the temporary seismic control panel 7 on the floor (hereinafter referred to as “predetermined floor”) where the pillar 1 (hereinafter referred to as “column 1”) where the seismic isolation device 4 is inserted and installed is located; The second step of reinforcing the frame around the column 1, the third step of transferring the column load from the column 1 to the temporary support material 2, and the column 1 to form the installation space S of the seismic isolation device 4 The fourth step of cutting and removing the middle part, the fifth step of installing the seismic isolation device 4 in the installation space S of the seismic isolation device 4, the column 1 in which the seismic isolation device 4 is installed from the temporary support material 2 and the immunity After the sixth step of transferring the column burden load to the seismic device 4 and the column burden load being transferred to the column 1 and the seismic isolation device 4 in which the seismic isolation device 4 is installed, the restraining means 8 is attached to the column 1. A seventh step of attaching and removing the temporary support material 2 as appropriate; an eighth step of removing the temporary seismic control panel 7; And a ninth step of removing the restraining means 8 is adapted to continue to complete at least the first step construction of the seventh step, sequentially for each one or appropriate number of all columns 1.

  In the present embodiment, the pre-cutting pillar 1 (hereinafter referred to as “unconstructed pillar 1”) for which the seismic isolation work has not yet been performed with respect to the horizontal force at the time of earthquake acting during the base isolation work on the predetermined floor. ), A bearing wall, a column 1 in which the seismic isolation device 4 has already been inserted and the restraining means 8 is attached (hereinafter referred to as “constructed column 1”), and the resistance elements of the temporary seismic control panel 7. That is, the temporary seismic control panel 7 resists horizontal force by restoring force and absorbs vibration energy of a predetermined floor by its history. It is a seismic isolation method that uses these comprehensive actions to accurately respond to earthquakes that are undergoing seismic isolation.

  The seismic isolation method for existing buildings according to the present embodiment is applied not only to columns of low-rise and middle-rise buildings, but also to columns on appropriate floors of high-rise and super-high-rise buildings. In addition, as the pillars to be constructed, the above steps may be repeated sequentially for the pillars selected as appropriate from among all the pillars of the building plan. In this embodiment, the existing building of RC structure is illustrated, but it is constructed for the existing building of SRC structure, S structure, steel pipe concrete structure, and mixed structure such as S structure and RC structure. Also good.

  FIGS. 1 to 10 show an existing building having a frame composed of a beam 6, a pillar 1, a floor 9, and a beam 5 on a lower floor on a predetermined floor. In the present embodiment, the beam 5 on the lower floor means a beam that supports the floor 9 on the predetermined floor, and the beam 6 on the predetermined floor means a beam installed on the upper part of the pillar 1 on the predetermined floor.

  The seismic isolation method will be applied to this existing building. The first step is a panel installation step. As shown in FIG. 1A as a first step, a temporary seismic control panel 7 is first installed.

  The temporary seismic control panel 7 is installed in a frame including the pillar 1, the beam 6 on the predetermined floor, and the beam 5 on the lower floor, and as a hysteretic vibration energy absorbing device, absorbs vibration energy in the horizontal direction of the predetermined floor based on the history. To do.

  The temporary seismic control panel 7 of the present embodiment is provided at an intermediate position between the columns 1, that is, at a central portion between the columns 1. The temporary seismic control panel 7 is provided between the floor on which the pillar 1 on which the seismic isolation device 4 is installed, that is, the beam 6 on the predetermined floor and the beam 5 on the lower floor located immediately below the beam 6. In this embodiment, the space between the beam 6 on the predetermined floor and the column 1 between the beam 5 on the lower floor means the upper surface of the floor 9 immediately above the beam 5 from the beam bottom of the beam 6. Further, the beam 5 itself may be set up to the upper surface of the floor 9. An appropriate space is provided between the temporary seismic control panel 7 and the pillars 1 on both sides. As an “appropriate interval” in the present embodiment, the interval between the end of the temporary seismic control panel 7 and the column 1 ensures at least a dimension that allows a person to walk.

  As shown in FIGS. 5 and 6, the temporary vibration control panel 7 includes a panel upper fixing member 60 provided on the beam 6 on a predetermined floor and an upper surface portion (hereinafter simply referred to as “floor 9”) on the floor 9, that is, the lower floor beam 5. It is fixed by a panel lower fixing member 90 provided on the upper side).

  The panel upper fixing member 60 is a horizontally long U-shaped steel plate member, and is attached so as to surround both side surfaces and the bottom surface of the beam 6. Both side surfaces 61 of the panel upper fixing member 60 are fixed to the side surfaces of the beam 6 with bolts. The width of the bottom surface 62 of the panel upper fixing member 60 is wider than the beam width. The upper surface of the temporary seismic control panel 7 is fixed to the bottom surface 62 with bolts. The panel upper fixing member 60 has a function of integrating the beam 6 and the temporary seismic control panel 7 and transmitting a horizontal force from the beam 6 such as seismic force to the temporary seismic control panel 7 as a hysteretic vibration energy absorbing device. is doing.

  The panel lower fixing member 90 is composed of lower panel fixing bolts 91 that penetrate the floor 9 from the lower floor and project on the floor 9. The lower part of the temporary vibration control panel 7 is fixed to the floor 9 by the lower panel fixing bolt 91. The panel lower fixing member 90 integrates the floor 9, that is, the beam 5 and the temporary vibration control panel 7, and transmits a horizontal force from the floor 9 such as a seismic force to the temporary vibration control panel 7 as a hysteretic vibration energy absorbing device. Have.

  The temporary seismic control panel 7 is formed as a single panel by connecting an upper panel 7a, an intermediate panel 7b, and a lower panel 7c that are horizontally long rectangles in the vertical direction. Each panel 7a, 7b, 7c of the temporary seismic control panel 7 is a rectangular steel plate panel member. Each panel 7a, 7b, 7c is set so that the length dimension of a horizontal direction becomes substantially the same.

  The upper panel 7a is a member for transmitting a horizontal force from the beam 6 to the intermediate panel 7b, and is configured with a steel plate material 70a as a main material. A reinforcing upper edge flange 71 and a flange 73 are provided on the surface side periphery of the steel plate material 70a. A steel reinforcing material 74 is provided at the center of the back surface of the steel plate material 70a.

  The upper edge flange 71 of the steel plate material 70 a is a steel plate member having substantially the same shape as the bottom surface 62 of the panel upper fixing member 60. The upper edge flange 71 is attached to the upper edge end of the steel plate material 70a in a T-shaped cross section. The upper edge flange 71 has a function of connecting the upper panel 7a and the panel upper fixing member 60 in addition to the reinforcing function of the steel plate material 70a. That is, the upper edge flange 71 and the bottom surface 62 are fixed with bolts to connect the steel plate material 70a and the panel upper fixing member 60, and the upper panel 7a and the beam 6 are integrated. Thereby, the horizontal force from the beam 6 can be transmitted to the intermediate panel 7b.

  The flange 73 of the steel plate material 70a is an elongated thin plate member made of steel. The flange 73 is attached to the side edge and lower edge surface of the steel plate material 70a in a substantially L-shaped cross section substantially perpendicularly. The reinforcing material 74 is a steel thin and thin plate-like member, and a plurality of reinforcing materials 74 are provided in the lateral direction at the center of the back surface of the steel plate material 70a.

  The lower panel 7c is a member for transmitting a horizontal force from the floor 9, that is, the beam 5, to the intermediate panel 7b, and is configured with a steel plate material 70c as a main material. The material and thickness of the steel plate material 70c in this embodiment are the same as the steel plate material 70a of the upper panel 7a.

  The lower edge flange 72 of the steel plate material 70c is a steel plate member attached to the lower edge end portion of the steel plate material 70c in a T-shaped cross section. The lower edge flange 72 has a function of connecting the lower panel 7c and the floor 9, that is, the beam 5, in addition to the reinforcing function of the steel plate material 70c. That is, the lower panel 7 c and the beam 5 are integrated by connecting the lower edge flange 72 to the floor 9, that is, the beam 5 by the lower panel fixing bolt 91. Thereby, the horizontal force from the beam 5 can be transmitted to the intermediate panel 7b.

  A substantially triangular reinforcing flange 77 is provided below the steel plate material 70c in the present embodiment. The reinforcing flange 77 is provided between the steel plate material 70 c and the lower edge flange 72, and is orthogonal to the steel plate material 70 c and the lower edge flange 72. As a result, the connecting portion of the lower panel 7c with the floor 9, that is, the beam 5, is reinforced, and the horizontal force from the floor 9, that is, the beam 5, is reliably transmitted to the intermediate panel 7b.

  The intermediate panel 7b is a main member of the temporary seismic control panel 7 as a hysteretic vibration energy absorbing device. The intermediate panel 7b is composed mainly of a steel plate material 70b, and has a function of resisting horizontal force such as seismic force by a restoring force in an elastic region and a function of absorbing vibration energy by a history in an elastic-plastic region. I have.

  In this embodiment, the member thickness of the steel plate material 70b is formed with lower strength (easily plastically deformed) than the steel plate material 70a of the upper panel 7a and the steel plate material 70c of the lower panel 7c. Specifically, it is made thin or formed of a low-strength steel material. As a result, in the temporary seismic control panel 7, the intermediate panel 7b is elastically plastically deformed before the upper panel 7a and the lower panel 7c, and can absorb the vibration energy in the horizontal direction acting on the predetermined floor. The function of the temporary seismic control panel 7 as an energy absorbing device is reliably achieved.

  The steel plate material 70b in this embodiment is a rectangular steel plate material, and the shape dimension is substantially the same as the external shape of the upper panel 7a. A steel flange 73 for reinforcement is provided on the surface side periphery of the steel plate material 70b. A steel reinforcing material 74 is provided at the center of the back surface of the steel plate material 70b. These functions, materials, and shapes are the same as those in the upper panel 7a.

  The temporary seismic control panel 7 is configured such that the flanges 73 of the panels 7a, 7b, and 7c face each other, and the reinforcing members 74 of the steel plate materials 70a, 70b, and 70c are aligned and connected to the same side. In this connection, each steel plate material 70a, 70b, 70c is sandwiched between splice plates 76 from both sides around the flange 73 and fixed with bolts.

  At this time, the intermediate panel 7b and the upper panel 7a are connected to each other with a clearance, or the intermediate panel 7b and the lower panel 7c are connected to both flanges 73 with a clearance. In order to form the clearance, a spacer member is sandwiched between the flanges 73.

  Further, the splice plate 76 and the bolt used for connection between the panels have sufficient strength and rigidity, and at least have higher strength and rigidity than the steel plate material 70b of the intermediate panel 7b.

  A decorative material 75 is provided on the flange 73 side (hereinafter “front surface”) and the reinforcing material 74 side (hereinafter “back surface”) of the temporary vibration control panel 7 so as to face the steel plate materials 70a, 70b, and 70c. . In the present embodiment, the decorative material 75 is applied to the entire surface of the temporary seismic control panel 7 in a state where the panels 7a, 7b, and 7c are connected. The surface of the decorative material 75 is given the same pattern color as the interior material of the wall or the finishing material of the outer wall. With the decorative material 75, the steel plate materials 70a, 70b, and 70c, the flange 73, and the reinforcing material 74 become invisible, and the environment of the room in use can be kept good.

  For fixing the temporary seismic control panel 7, the upper edge flange 71 of the upper panel 7 a and the bottom surface 62 of the panel upper fixing member 60 of the beam 6 are connected by bolts. The lower part of the temporary seismic control panel 7 is fixed by passing a lower panel fixing bolt 91 through the lower edge flange 72 of the lower panel 7c and fastening with a nut. For this reason, the temporary seismic control panel 7 can be attached to and detached from the beam 6 and the floor 9, that is, the beam 5 by removing bolts.

  In the present embodiment, the upper and lower portions of the temporary seismic control panel 7 and the intermediate panel 7b and the upper panel 7a, the lower panel 7c are firmly joined to each other by the splice plate 76 and the bolt, and the strength of the intermediate panel 7b is The upper panel 7a and the lower panel 7c are lower, or the thickness of the steel plate material 70b is thinner than the steel plate materials 70a and 70c of the upper panel 7a and the lower panel 7c. For this reason, the upper panel 7a and the beam 6 and the lower panel 7c and the floor 9 behave integrally by a horizontal force such as seismic force, and the horizontal force is transmitted to the intermediate panel 7b. As a result, the steel plate material 70b of the intermediate panel 7b can be elastically deformed without buckling to absorb the vibration energy in the horizontal direction due to an earthquake or the like and to resist the horizontal force.

  In the present embodiment, the connection between the upper and lower panels 7a, 7c and the intermediate panel 7b is bolt-bonded with at least one of them with appropriate clearance, but may be welded by being brought into close contact with each other.

  As a 2nd process, frame reinforcement is performed to the circumference | surroundings of the pillar 1 used as the object which incorporates seismic isolation apparatuses 4, such as laminated rubber. (See FIG. 1B).

  Thereafter, the frame structure around the pillar 1 is reinforced. When reinforcing the frame, avoid the installation location of the seismic isolation device 4 and form the additional portion 11 in the form of expanding the beam width and the beam width on the beam 6 around the pillar 1 and widening the pillar 1 in the form of widening. A portion 12 is formed. In the illustrated example, the widened portion 12 is formed up to the floor 9 over the entire installation position of the seismic isolation device 4, but the widened portion 12 may be formed to the minimum necessary, and needs to be formed up to the floor 9. There is no need to form the column 1 halfway in the height direction.

  In the third step, an operation of transferring the column burden load from the column 1 to the jack 2a that is the temporary support member 2 is performed. In this step, as shown in FIG. 1 (C), an appropriate number of extendable jacks 2a as temporary support members 2 are arranged around the columns 1 in the column height direction, and these jacks 2a are stretched. The upper end is brought into contact with the additional portion 11 from below. Therefore, the additional portion 11 of the beam 6 on the predetermined floor is formed with a size that can contact at least the upper end of the jack 2a. The jack 2a supports the column burden load via the additional portion 11 of the beam 6 on the predetermined floor by taking a support reaction force on the beam 5 on the lower floor. Thereby, the building load borne by the pillar 1 is transferred to the jack 2a.

  The lower floor beam 5 that bears the support reaction force of the jack 2a is reinforced as necessary, or a separate jack is installed under the lower floor beam 5, and the support reaction force is also applied from the lower floor beam. You may make it take. Moreover, the stress from the temporary seismic control panel 7 bearing the horizontal force acting on the building is also borne by the beam 5 on the lower floor. As described above, the temporary seismic control panel 7 is composed of the column 1 because the lower reaction beam 5 connected to the column 1 bears the support reaction force of the jack 2a and the stress from the temporary seismic control panel 7 together. It is preferable to install on a different pillar. In addition, by installing the temporary seismic control panel 7 on a pillar different from the pillar 1, it is possible to secure a wide work space for the above-mentioned frame reinforcement and the like.

  In the present embodiment, the horizontal force is resisted by the resistance elements of the unconstructed pillar 1, the existing bearing wall, the constructed pillar 1, and the temporary seismic control panel 7, and the jack 2a is burdened with the horizontal force. There is no need to perform operations such as rigidly joining the upper and lower sides of the jack 2a to the floor 9 or the additional portion 11. Thereby, the attachment structure of the jack 2a can be simplified, and both the attachment work and the removal work can be facilitated.

  In a 4th process, the work which cuts pillar 1 and forms installation space S of seismic isolation device 4 is carried out. In this step, as shown in FIG. 2 (D), the pillar 1 is cut at two upper and lower portions between the additional portion 11 and the widened portion 12 for reinforcing the frame, and the excised portion 13 between these cut portions is changed to the pillar. Remove from 1. Thereby, the installation space S of the seismic isolation device 4 is formed in the pillar 1 position of the predetermined floor in the state supported by the jack 2a.

  In the fifth step, the seismic isolation device 4 is inserted and installed in the installation space S. In this step, as shown in FIG. 2 (E), the seismic isolation device 4 is inserted and installed in the installation space S of the pillar 1 from which the cut portion 13 has been removed. Although this mounting operation is not shown, first, the seismic isolation device 4 is inserted into the installation space S, and the fixing members projecting from the upper base plate 4a and the lower base plate 4b that are detachably joined to the upper and lower flange plates of the seismic isolation device 4, respectively. 4c is arrange | positioned so that it may face the cut surface of the pillar 1, respectively. Next, the periphery of the pillar 1 is surrounded by a mold so as to surround the fixing member 4c. Thereafter, the seismic isolation device 4 is fixed to the column 1 by a method such as filling a grout material such as concrete or mortar into the mold. After the concrete has developed the necessary strength, the formwork is removed. Thereby, the seismic isolation device 4 is installed between the upper pillar part 1a and the lower pillar part 1b of the pillar 1.

  In the sixth step, the work of transferring the column load is transferred from the jack 2a to the seismic isolation device 4. In this step, as shown in FIG. 2 (F), the jack 2 a is contracted and the upper end thereof is detached from the additional portion 11. As a result, the column burden load that has been supported by the jack 2a is transferred to the upper column portion 1a, the seismic isolation device 4 and the lower column portion 1b, whereby the column burden load is isolated from the upper column portion 1a. It is transmitted to the lower column 1b through the device 4.

  The seventh step is a restraining means installation step. That is, it is a step of installing the restraining means 8 that restrains the seismic isolation action of the seismic isolation device 4. In the seventh step, after the column load is transferred from the jack 2a to the column 1 where the seismic isolation device 4 is installed and to the seismic isolation device 4, the column load is inserted into the column 1 where the seismic isolation device 4 is installed. After the transfer to the seismic isolation device 4 is completed, the restraining means 8 is attached to the pillar 1 and the jack 2a is removed as appropriate. The restraining means 8 of this embodiment is composed of a seismic isolation restraining plate 8a.

  Here, after transferring the column load from the jack 2a to the column 1 and the seismic isolation device 4 in which the seismic isolation device 4 is installed, that is, “the column 1 in which the seismic isolation device 4 is inserted and installed from the temporary support material 2”. "The column burden load is transferred to the seismic isolation device 4, and after that" all the column load loads are completely transferred from the jack 2a to the column 1 and the seismic isolation device 4 in which the seismic isolation device 4 is installed. That is, the jack 2a is not subjected to any building load, and thus the jack 2a can be removed.

  In that sense, the seventh step includes a state in which the upper end of the jack 2a shown in FIG. In other words, the column burden load transfer operation in the sixth step refers to an operation stage in which the column burden load is gradually transferred from the jack 2a to the column 1 and the seismic isolation device 4 in which the seismic isolation device 4 is inserted. Step 7 is a stage after the state in which the jack 2a can be removed at any time.

  As shown in FIGS. 3 (G) to (I) and FIG. 5, the state in which the jack 2a is removed is of course the seventh step.

  Regardless of whether the jack 2a is actually removed or not, after the building load no longer acts on the jack 2a, the seismic isolation plate 8a surrounds the seismic isolation device 4 and the upper base plate 4a. It is attached between the lower base plate 4b.

  The seismic isolation action restraint plate 8a restrains the horizontal displacement of the seismic isolation device 4 between the upper upper column portion 1a and the lower lower column portion 1b of the seismic isolation device 4, and Regulate direction deformation. At the stage where all the column load is completely transferred from the jack 2a to the seismic isolation device 4, the seismic isolation device 4 is slightly submerged by the column load. In this embodiment, the seismic isolation device 4 is attached with the seismic isolation action restraint plate 8a after considerable deformation is caused by bearing the column load.

  Therefore, when the seismic isolation action restraint plate 8a is attached, it can be installed on the column 1 without causing any initial strain or initial stress. Therefore, the seismic isolation action restraint plate 8a appropriately restrains the horizontal displacement in the column 1 according to the design value, and the seismic isolation device 4 is deformed (moves in the horizontal direction) even if the horizontal force acts on the existing building. It resists the horizontal force generated in the building due to an earthquake, strong wind, etc. together with the unconstructed pillar 1, the existing bearing wall, the constructed pillar 1, and the temporary seismic control panel 7, thereby ensuring the safety of construction.

  FIG. 7 shows how the seismic isolation restraint plate 8a is attached. The seismic isolation restraint plate 8a shown in FIG. 7 is such that two pieces of plate pieces 19 bolted to the upper base plate 4a and the lower base plate 4b are bolted to each other in the installation space S of the seismic isolation device 4. It is.

  In the seismic isolation method for an existing building according to the present embodiment, as shown in FIG. 3, at least the third to seventh steps described above are applied to one of all the pillars 1 or the appropriate number. Each is completed sequentially. For example, in the case of one, the column load is transferred to the jack 2a for the one pillar 1, the work is performed according to the above procedure, the jack 2a is removed, and then the seismic isolation action restraining plate 8a is attached. The work is completed, and then the process of transferring the work to another pillar 1 is repeated.

  In the case of an appropriate number, the construction for these pillars 1 is advanced in parallel, and when the construction is completed, the same construction is repeated for the next appropriate number of pillars 1. That is, if the work procedure in the seismic isolation method for the existing building according to the present embodiment is not a construction form in which at least all the pillars 1 are jacked down at once, even if the pillars are constructed one by one in order, The construction for the number of pillars 1 may be sequentially repeated, whereby the jack 2a can be diverted and the necessary number of jacks can be reduced as much as possible.

  After the construction up to the seventh step is performed on the total number of pillars 1 on the predetermined floor, the operations of the eighth step and the ninth step are sequentially performed. The eighth step is a panel removal step for removing the temporary seismic control panel 7 as shown in FIG.

  Thereafter, in the ninth step, the seismic isolation action restraint plate 8a is removed. Thereby, the seismic isolation apparatus 4 installed in the desired pillar 1 of the existing building can be made to fully function, and the construction of the seismic isolation method according to this embodiment is completed.

  In the above-described embodiment, the embodiment related to the seismic isolation work in which the entire predetermined floor is one construction area and the seismic isolation device 4 is inserted and installed in the column 1 has been described. Further, an embodiment in which the predetermined floor is divided into a plurality of regions and the first to seventh steps are sequentially performed on each region will be described below.

  As shown in FIGS. 8 to 10, the existing building is divided into three areas A, B, and C, and the seismic isolation device 4 is installed for each area.

  In the seismic isolation work in each region, the number and position of the temporary seismic control panels 7 arranged for a predetermined floor are the horizontal vibration energy to be absorbed by the temporary seismic control panel 7 as a hysteretic vibration energy absorbing device, It is determined in consideration of the resistance to the horizontal force of the unconstructed pillar 1 and the bearing wall and the already constructed pillar 1. Further, the position of the temporary seismic control panel 7 is determined so that the center of gravity and the rigid center of the predetermined floor coincide as much as possible.

  The planar shape of the predetermined floor of the existing building is formed in an L shape in the illustrated example. The L-shape is divided into a vertical portion, a corner portion, and a horizontal portion, and the vertical portion is set as an A region, the corner portion is set as a B region, and the horizontal portion is set as a C region.

  The A area is set to an area of 2 spans in the X direction and 3 spans in the Y direction. Adjacent B regions are set with one side in the X direction of the A region as a boundary. The B area is set to an area of 2 spans in the X direction and 3 spans in the Y direction. The C area is set with one side in the Y direction of the B area as a boundary. The C area is set to an area of 3 spans in the X direction and 3 spans in the Y direction.

  In the seismic isolation work for the existing building on the L-shaped plane, the seismic isolation device 4 is inserted and installed in the pillar 1 in each region in the order of the A region, the B region, and the C region. In each region, the construction from the first step to at least the seventh step is performed.

  The seismic isolation work for existing buildings will be carried out in sequence starting from pillar 1 in area A. The first step is a panel installation step.

  Regarding the placement of the temporary seismic control panel 7 in the A region, the vibration energy to be absorbed by the temporary seismic control panel 7 in the state where the column 1 is cut during the seismic isolation work in the A region, the B region, the C Determined in consideration of resistance to horizontal force of unconstructed pillar 1 in the area. In addition, consideration should be given to reducing the deviation between the center of gravity and the center of gravity of the entire existing building. Thereby, the twist action by a horizontal force can be reduced. For example, the required number of temporary seismic control panels 7 is calculated by seismic response analysis, and the installation position of the temporary seismic control panel 7 in the area A is determined by stress analysis.

  In this embodiment, the temporary seismic control panels 7 are provided at a total of four locations between the columns 1 on the outer wall side in the X direction and Y direction of the A region (hereinafter referred to as “span”). Two temporary seismic control panels 7 are arranged in the X direction and two in the Y direction. Temporary seismic control panels 710 and 720 are respectively installed in two spans on one side of the outer wall side in the X direction. Temporary seismic control panels 730 and 740 are installed on the center spans of the two sides on the outer wall side in the Y direction.

  Each temporary seismic control panel 710, 720, 730, 740 is attached to the middle position of each span by performing fine adjustment of the height or the like according to the existing under-beam dimensions.

  The surface of the temporary seismic control panels 710 to 740 on the outer wall side is provided with a decorative material 75 having a pattern or the like that matches the pattern of the outer wall surface, and the surface on the A region side has a pattern or the like similar to the interior of the wall. A decorative material 75 is provided. Thereby, when using area | region A, indoor environment can be kept favorable and it can avoid impairing the external appearance of a building.

  Since the construction procedure in each process from the second step to the seventh step in the region A is the same as that described above, the description thereof is omitted.

  The eighth step in the A area, that is, the removal of the temporary seismic control panel 7 is performed after considering the seismic isolation work in the B area. In other words, after considering the already constructed pillar 1 in the A area, the number and arrangement of temporary seismic control panels in the seismic isolation work in the B area were examined, and the unnecessary temporary damping panel 7 in the A area was removed. To do.

  In this embodiment, the temporary seismic control panel 7 is not removed, and all the temporary seismic control panels 710 to 740 are left.

  The 1st process in B area | region is implemented and the temporary seismic control panel 7 is provided. Regarding the number and arrangement of the temporary seismic control panels 7 to be installed in the B area, the vibration energy to be absorbed by the temporary seismic control panel 7 in the state where the pillar 1 is cut during the seismic isolation work in the B area, It is determined in consideration of the resistance to the horizontal force of the non-constructed pillar 1 in the C region and the constructed pillar 1 in the A region. In addition, consideration should be given to reducing the deviation between the rigid center and the center of gravity of the existing building as a whole. As in the case of the A region, the necessary number of temporary seismic control panels 7 is calculated by an earthquake response analysis, and the installation position of the temporary seismic control panel 7 in the B region is determined by a stress analysis.

  Three temporary seismic control panels 7 are installed in connection with the insertion and installation of the seismic isolation device 4 to the pillar 1 in the region B of the present embodiment. Temporary seismic control panels 750 and 760 are provided in each direction in the vicinity of the outer wall intersections in the X direction and Y direction of the protruding corners of the L-shaped reference floor 20. In addition, a temporary seismic control panel 770 is provided in the X direction A region on the boundary side between the B region and the A region.

  Each temporary seismic control panel 750, 760, 770 is attached to the middle position of each span by finely adjusting the height in accordance with the existing under-beam dimensions. A decorative material 75 that harmonizes with the outer wall is provided on the outer wall side surface of each temporary vibration control panel 750, 760, and 770, and a decorative material 75 that harmonizes with the interior is provided on the indoor side.

  Since the second process to the seventh process in the region B are the same as described above, the description thereof is omitted.

  The concept of the removal step of the temporary seismic control panel 7 as the eighth step in the B region is the same as in the A region. In other words, considering the number and arrangement of the temporary seismic control panels 7 in the C region in consideration of the pillars 1 and the temporary seismic control panels 7 in the A region and the B region, the extra in the A and B regions The temporary seismic control panel 7 is removed.

  In the present embodiment, the temporary seismic control panel 770 in the A region X direction is removed. The removed temporary seismic control panel 770 is diverted to the temporary seismic control panel 7 in the C region.

  Next, we will start seismic isolation work in C area. Since the procedure, method, and concept are the same as those of the A region and the B region, description thereof is omitted.

  In the present embodiment, the temporary seismic control panels 7 are provided at a total of three locations on the outer wall side spans in the X and Y directions surrounding the C region. A temporary seismic control panel 800 is installed on the center span on the outer wall side in the X direction. Temporary seismic control panels 810 and 820 are installed in two spans on the outer wall side in the Y direction, respectively. As the temporary seismic control panel 810, the removed temporary seismic control panel 770 of the area A is used.

  With respect to the temporary seismic control panel 800, the temporary seismic control panel 770 in the area A is diverted, so that it is necessary to change the height and adjust the structural function. In this case, adjustment is performed by replacing the intermediate panel 7b of the temporary seismic control panel 770, and the temporary seismic control panel 800 is diverted.

  Further, a decorative material 75 is appropriately provided on each temporary seismic control panel 800 to 820. Since C area | region is the last construction area | region of a predetermined floor, the temporary seismic control panels 800-820 are removed in the panel removal process of the 8th process of C area | region. At the same time, the temporary seismic control panels 710, 720, 730, 750, and 760 left in the A region and the B region are also removed, and the panel removing step in the eighth step is completed. Subsequent to the eighth step, as a ninth step, the seismic isolation restraint plate 8a attached to the pillar 1 in the regions A, B, and C is removed and the construction is completed.

  The temporary seismic control panel may be removed after removing the seismic isolation action restraint plate by reversing the procedures of the 8th and 9th steps in this embodiment. In other words, the seismic isolation device can be operated, and the temporary seismic control panel can be removed while the function of absorbing the vibration energy by the remaining temporary seismic control panel is activated during the removal work of the temporary seismic control panel.

  In the seismic isolation method for an existing building according to the present embodiment described above, after the column load is transferred from the temporary support material 2 to the seismic isolation device 4, the seismic isolation action restraining plate 8 a is attached to the column 1. It is the installation procedure. Therefore, when the seismic isolation restraint plate 8a is attached, since the seismic isolation device 4 has undergone deformation caused by the transfer of the column load, any initial strain or strain is applied to the seismic isolation restraint plate 8a. No initial stress is generated, the restraint performance according to the design value can be demonstrated, the function as a safety device at the time of construction can be sufficiently performed, and the construction safety can be assured highly. .

  In the present embodiment, each of the resistance elements of the unstructured pillar 1, the bearing wall, the already constructed pillar 1, and the temporary seismic control panel 7 with respect to the horizontal force at the time of earthquake acting during the seismic isolation work on the predetermined floor It corresponds by. That is, the temporary seismic control panel 7 resists horizontal force by restoring force and absorbs vibration energy of a predetermined floor by its history. Since these are functioning comprehensively and responding to earthquakes that are undergoing seismic isolation work, they are compatible with all types of seismic isolation work and are highly safe.

  By using the temporary vibration control panel 7 as a hysteretic vibration energy absorbing device, vibration energy can be absorbed, thereby making it possible to reduce temporary reinforcement.

  In this embodiment, since the temporary seismic control panel 7 as a hysteretic vibration energy absorbing device is used, it is not necessary to restrain with the left and right columns like a brace, and the space between the column 1 and the temporary seismic control panel 7 is eliminated. A passage can be secured. The seismic isolation work can be performed while staying at the predetermined floor, that is, while being used, and the burden on the building user can be reduced.

  In addition, by installing the temporary seismic control panel 7 at the middle position of the span, shear and bending stress to the beam 5, the beam 6 and the existing column 1 when the horizontal force is input to the temporary seismic control panel 7 are reduced. Safe construction is possible.

  In this embodiment, the temporary seismic control panel 7 includes an upper panel 7a, an intermediate panel 7b, and a lower panel 7c. The fact that the temporary seismic control panel 7 is divided into three parts makes it possible to adjust the functional surface required for the temporary seismic control panel 7 depending on the attachment location, and can easily cope with diversion.

  That is, in the present embodiment, the steel plate material 70b of the intermediate panel 7b of the temporary seismic control panel 7 is thinner than the steel plate materials 70a and 70c of the other panels or has a lower strength. The characteristics of the temporary seismic control panel 7 can be determined by the steel plate material 70b of the intermediate panel 7b.

  Moreover, the connection between each panel of the temporary seismic control panel 7, the upper panel 7a and the beam 6, and the lower panel 7c and the beam 5 are made by bolts. For this reason, the panel can be easily attached, disassembled and removed by attaching and detaching bolts.

  Furthermore, when the intermediate panel 7b is connected to the upper panel 7a and the lower panel 7c, some clearance is provided, so that the seismic isolation device 4 is affected by the subsidence caused by the transfer of the column load. Even so, the intermediate panel 7b, the upper panel 7a, and the lower panel 7c can be disassembled relatively easily.

  Further, when the temporary seismic control panel 7 is diverted and used, even if the diversion destination has different dimensions, it can be easily handled. That is, by using the upper panel 7a and the lower panel 7c in common at each installation location and changing only the height of the intermediate panel 7b, it can be easily accommodated to any height and is economical.

  Furthermore, only the intermediate panel 7b corresponding to the diversion position of the temporary seismic control panel 7 is prepared in advance, or conversely, only the upper panel 7a and the lower panel 7c are diverted in advance, and the adjusted intermediate The panel 7b can be attached later, and efficient diversion becomes possible.

  Such attachment of the temporary seismic control panel 7, ease of disassembly, and ease of function change are particularly advantageous when the predetermined floor is divided into regions and the seismic isolation work is advanced for each region. That is, for each construction area, it is necessary to determine the placement of the temporary seismic control panel 7 in consideration of changes in the pre-construction pillar 1, the construction-completed pillar 1, the rigid position of the entire existing building, and the like. In this case, the temporary seismic control panel 7 can be installed and moved in detail, and safe and economical construction is possible.

  Furthermore, performing seismic isolation work by dividing the predetermined floor into areas can provide flexibility in construction management, and the required number of jacks can be increased when jacking up or down the entire building at once. Compared to, it can be reduced.

  In addition, the temporary seismic control panel 7 is installed before the transfer of the column load to the temporary support material 2 and is installed after the load is transferred to the seismic isolation device 4, so that it can cope with the horizontal force throughout the construction period. Safety is ensured.

  In the present embodiment, since the decorative material 75 is provided on the front and back surfaces of the temporary seismic control panel 7, comfortable continuous use is possible without impairing the usage environment of the predetermined floor.

  The present embodiment is not limited to the above-described form. In the present embodiment, the installation process of the temporary seismic control panel 7 in the first process is performed prior to the reinforcement of the housing in the second process. However, even if the first process is performed after the second process, both processes are performed in parallel. May be implemented. At least before the start of the third step, it is sufficient that the installation of the temporary seismic control panel 7, which is the first step, is completed.

  The second step may be applied to all the pillars 1 at a time, or may be applied sequentially to several pillars 1 and further to each pillar one by one. .

  The decorative material 75 of the temporary seismic control panel 7 may be provided only on one side of the temporary seismic control panel 7 depending on the mounting position of the temporary seismic control panel 7. Further, the decorative material 75 may be provided not only on the entire front and back surfaces of the temporary seismic control panel 7 but also on a part thereof.

  The decorative material 75 may be provided for each panel, or may be provided on the temporary seismic control panel 7 in a state where the panels 7a, 7b, and 7c are connected. Further, the pattern or the like of the decorative material 75 is not necessarily matched with the pattern of the wall or the outer wall, and an appropriate pattern or the like for the indoor environment may be selected. For example, it may be a landscape photograph, a white board or a bulletin board.

It is a figure explaining until it transfers a column burden load to a temporary support material among the procedures of the seismic isolation method in this suitable embodiment concerning this invention. It is a figure explaining until it transfers a column burden load to a seismic isolation apparatus among the procedures of the seismic isolation method in this suitable embodiment concerning this invention. It is a figure explaining the process until a temporary seismic control panel is removed among the procedures of the seismic isolation method in this suitable embodiment concerning this invention. It is a flowchart which shows the procedure of the seismic isolation construction method in suitable embodiment concerning this invention. It is a suitable embodiment of the temporary seismic control panel used for the seismic isolation method of the existing building concerning this invention, Comprising: It is an elevation view which shows the installation condition of the temporary seismic control panel which does not have a makeup | decoration material. It is sectional drawing which shows the longitudinal cross-section of the temporary seismic control panel of FIG. 4 in the state which provided the decorative material. It is an elevation view which shows the attachment condition of the horizontal displacement restraint means to a seismic isolation apparatus. It is an arrangement top view of a temporary seismic control panel at the time of seismic isolation construction of A field in the case of constructing a predetermined floor divided into areas. It is an arrangement top view of the temporary seismic control panel at the time of seismic isolation construction of B area when constructing by dividing a predetermined floor into areas. It is an arrangement top view of the temporary seismic control panel at the time of seismic isolation construction of C area when constructing by dividing a predetermined floor into areas.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Column 2 Temporary support material 3 Middle part of column 4 Seismic isolation device 5 Beam of lower floor 6 Beam of floor where column is located 7 Temporary seismic control panel 8 Constraining means

Claims (5)

  The existing building is exempted by transferring the column load from the pillar on the predetermined floor of the existing building to the temporary support material arranged around the pillar, cutting and removing the middle part of the pillar and inserting the seismic isolation device. Used in the seismic construction method,
  Before transferring the column load from the column to be cut to the temporary support material, it is attached between the beam on the floor where the column to be cut is located and the beam on the lower floor to absorb the vibration energy in the horizontal direction. A temporary seismic control panel,
  An upper panel removable from the beam on the floor where the pillar to be cut is located;
  A lower panel that can be attached to and detached from the beam on the lower floor directly below the beam to which the upper panel is attached;
  It is formed with a lower strength than these upper and lower panels, and is composed of an intermediate panel attached between these upper and lower panels,
  Each panel is composed of a steel plate material and a steel flange provided on the periphery thereof,
  The upper panel, the intermediate panel, and the intermediate panel and the lower panel are fastened with bolts by sandwiching the steel flanges with a splice plate having higher strength and rigidity than the steel plate material of these panels. Temporary seismic control panel used in seismic isolation methods for existing buildings, characterized by being connected.   The temporary seismic control panel used in the existing building seismic isolation method according to claim 1, wherein the intermediate panel is formed thinner than the upper and lower panels.   The temporary seismic control panel used for the seismic isolation method of the existing building according to claim 1 or 2, wherein a decorative material is applied to the front and back surfaces of the temporary seismic control panel.   Using the temporary seismic control panel used for the seismic isolation method of the existing building according to any one of claims 1 to 3,
  For each of one or more pillars on a given floor of an existing building, the column load is transferred from the pillars to a temporary support material arranged around the pillars, and the middle part of the pillars is cut and removed to eliminate seismic isolation. After inserting and installing the device, transfer the column burden load from the temporary support material to the seismic isolation device, and then remove the temporary support material one by one for all the columns on the same floor or as appropriate It is a seismic isolation method for existing buildings
  Panel installation in which the temporary seismic control panel is attached between the beam on the floor where the column to be cut is located and the beam on the lower floor before the column load is transferred from the column to be cut to the temporary support material. Process,
  After transferring the column load from the temporary support material to the seismic isolation device, a restraining means installation step for attaching a restraining means for restraining the horizontal displacement of the seismic isolation device;
  A seismic isolation method for an existing building, comprising: a panel removal step of removing the temporary seismic control panel after completing the restraining means installation step and removing the temporary support material.   5. The existing building according to claim 4, wherein the temporary seismic control panel is installed at an intermediate position between any of a pair of columns on the floor where the column is located, with an appropriate interval from the pair of columns. Seismic isolation method.

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