JP6338563B2 - Tower structure - Google Patents

Description

  The present invention includes a first structure such as a chimney cylinder extending in the vertical direction from the ground, a steel tower that is disposed at least partially around the first structure and is connected to the ground to support the first structure. And a second structural body.

  Conventionally, for example, in a seismic isolation type tower shown in Patent Document 1, a seismic isolation device is interposed between each leg of a tower having a plurality of legs and a lower structure such as a building that supports the tower. Has been.

  Moreover, for example, the seismic isolation device for a steel tower shown in Patent Document 2 is a seismic isolation device equipped between a plurality of legs of a steel tower and a lower structure such as a building in which the steel tower is erected.

  Further, for example, an internal smoke cylinder suspension support type chimney disclosed in Patent Document 3 supports the upper part of the internal smoke cylinder in a suspension support type by a load support means having a seismic isolation member interposed in the outer support structure, and the internal smoke cylinder Is supported by the side support means of the outer support structure so as to be slidable in the vertical direction, and at least the horizontal side surface of the inner smoke tube is vibrated between the support positions by the load support means and the side support means. It is connected to the outer support structure via an attenuator that absorbs energy.

JP 2001-182371 A JP 2002-030830 A JP 2000-064661 A

  Patent Documents 1 and 2 mentioned above are not tower-like structures that support the cylinder body by a steel tower, but a steel tower installed on the roof of a lower structure such as a building or a building, between the legs of the steel tower and the lower structure. Has a seismic isolation device.

  In addition, Patent Document 3 described above is a tower-like structure that supports a cylinder by a steel tower, but the lower end of the cylinder is not fixed and a smoke exhaust duct is connected, and the upper end and the side of the cylinder are connected. Is supported by a seismic control structure against the steel tower.

  By the way, the first structure such as a cylinder extending vertically from the ground is greatly shaken by vibration such as an earthquake because the lower end is connected to the ground and the upper end is free. For this reason, a tower-like structure provided with a first structure and a second structure such as a steel tower that is arranged at least partially around the first structure and is connected to the ground and supports the first structure. Generally known.

  In recent years, a design earthquake external force has been set large for such a tower-like structure. In this case, in a generally known tower-like structure, the wall thickness of the cylindrical body as the first structure is increased, or the legs and beams of the steel tower as the second structure are increased to increase the strength. And there is a problem that the manufacturing cost increases because the number of main members increases.

  Therefore, for the above tower-like structure, for example, a seismic isolation device as shown in Patent Documents 1 and 2 is provided between the ground and the lower end of the chimney cylinder, and between the ground and the lower end of the steel tower. Because the entire chimney cylinder is relatively displaced in the horizontal direction with respect to the ground, the relative displacement of the chimney cylinder at the connection between the chimney cylinder and the smoke exhaust duct connected to the chimney cylinder or at the exhaust duct itself An expansion joint that absorbs water is required.

  Further, for example, when a damping structure as shown in Patent Document 3 is applied between the chimney cylinder and the steel tower, the external force of the earthquake can be absorbed with respect to the tower-like structure. It is difficult to absorb the design seismic external force.

  The present invention solves the above-described problem, and is arranged in a first structure body such as a chimney cylinder extending vertically from the ground and at least part of the periphery of the first structure and connected to the ground. An object of the present invention is to provide a tower-like structure including a second structure such as a steel tower that supports one structure, which can absorb a large earthquake external force.

  In order to achieve the above-described object, the tower-like structure of the present invention is configured to support the first structure by being arranged at least in a part around the first structure extending in the vertical direction and the first structure. A second base that connects the lower end of the first structure to the ground, a second base that connects the lower end of the second structure to the ground, the second structure, and the A seismic isolation device provided between the second base portion and the second base portion.

  According to this tower-like structure, the horizontal displacement due to the seismic external force with respect to the first structure is absorbed by the seismic isolation device via the second structure, so even if the seismic external force is greatly designed, the second structure side Can be absorbed. In addition, since the first structure is fixed to the first foundation only at the lower end, the natural vibrations are relatively long from the beginning, and the seismic isolation device allows horizontal displacement due to external forces on the second structure. The suppression of the natural vibration of the original first structure is eased to make the natural vibration longer. In other words, the seismic response is reduced by a countermeasure for extending the period with the seismic isolation device for the level 3 scale earthquake motion that is larger than the level 2 scale earthquake motion in the seismic design. As a result, the main members constituting the first structure and the second structure can be reduced, and the manufacturing cost can be reduced. In addition, conventionally, the tower-like structure of the present invention is isolated only from the second structure, while performing isolation from the entire structure (first structure + second structure). An equivalent seismic isolation effect can be obtained, and an expansion joint that is conventionally required when piping or the like is connected to the first structure is not required.

  Further, in the tower-like structure of the present invention, the second foundation part includes a foundation frame in which a lower end of the second structure is fixed, and a foundation body fixed to the ground, and the seismic isolation device Is provided between the foundation housing and the foundation body.

  According to this tower-like structure, when a horizontal displacement due to an earthquake external force occurs in the second structure, a pulling force is applied to the second structure in the vertical direction. It can be suppressed by the foundation frame to which the lower end of is fixed. Moreover, the horizontal displacement due to the seismic external force can be absorbed by the seismic isolation device provided between the foundation frame and the foundation body.

  In the tower-like structure of the present invention, the seismic isolation device supports the second structure so that the second structure can be moved in the horizontal direction with respect to the second foundation, the second foundation, and the A restoring force mechanism for applying a restoring force between the second structure and a damping force mechanism for applying a damping force between the second base portion and the second structure. .

  According to this tower-like structure, the effect of absorbing the horizontal displacement due to the earthquake external force can be remarkably obtained with respect to the first structure.

  In the tower-like structure of the present invention, the seismic isolation device supports the second structure so as to be movable in the horizontal direction with respect to the second base portion, and the second base portion and the second base portion. It includes a bearing for applying a restoring force between the structure and a damping force mechanism for applying a damping force between the second base portion and the second structure.

  According to this tower-like structure, the function of supporting the second structure so as to be movable in the horizontal direction with respect to the second foundation by support and the restoring force between the second foundation and the second structure are provided. The seismic isolation device can be downsized and the installation range of the seismic isolation device can be reduced.

  In the tower-like structure of the present invention, the seismic isolation device supports the second structure so as to be movable in the horizontal direction with respect to the second base portion, and the second base portion and the second base portion. A damping rubber bearing is provided that applies a damping force between the second base portion and the second structure while applying a restoring force to the structure.

  According to this tower-like structure, the function of supporting the second structure so as to be movable in the horizontal direction with respect to the second foundation by the damping rubber support, and the restoration between the second foundation and the second structure. The function of applying a force and the function of applying a damping force between the second foundation and the second structure can be achieved, and the seismic isolation device can be reduced in size, and The installation range can be reduced.

  Moreover, the tower-like structure according to the present invention further includes a vibration control device provided between the first structure and the second structure.

  According to this tower-like structure, in addition to the effects described above, excessive vibration of the first structure can be suppressed.

  According to the present invention, a large earthquake external force can be absorbed.

FIG. 1 is a side view of a tower-like structure according to an embodiment of the present invention. FIG. 2 is a plan view of the tower-like structure according to the embodiment of the present invention. FIG. 3 is an enlarged cross-sectional view of another example of the seismic isolation device in the tower structure according to the embodiment of the present invention. FIG. 4 is an enlarged plan view of another example of the seismic isolation device in the tower structure according to the embodiment of the present invention. FIG. 5 is an enlarged cross-sectional view of another example of the seismic isolation device in the tower structure according to the embodiment of the present invention. FIG. 6 is an enlarged cross-sectional view of another example of the seismic isolation device in the tower structure according to the embodiment of the present invention. FIG. 7 is an enlarged cross-sectional view of another example of the seismic isolation device in the tower structure according to the embodiment of the present invention. FIG. 8 is a side view of another example of the tower-like structure according to the embodiment of the present invention.

  Embodiments according to the present invention will be described below in detail with reference to the drawings. In addition, this invention is not limited by this embodiment. In addition, constituent elements in the following embodiments include those that can be easily replaced by those skilled in the art or those that are substantially the same.

  FIG. 1 is a side view of a tower-like structure according to this embodiment. FIG. 2 is a plan view of the tower-like structure according to the present embodiment.

  In FIG. 1, a tower-like structure 1 of the present embodiment includes a first structure 2 that extends in the vertical direction, and a first structure 2 that is disposed at least partially around the first structure 2 and supports the first structure 2. Two structures 3.

  The first structure 2 includes, for example, a cylinder. The second structure 3 includes, for example, a steel tower. In the following description, the first structure 2 is appropriately referred to as a cylinder 2, and the second structure 3 is appropriately referred to as a steel tower 3. The first structure 2 may be, for example, a columnar structure or a towerable structure that can be inhabited.

  The lower end of the tube body 2 is fixed to the first base portion 4. The first foundation portion 4 connects the lower end of the tubular body 2 to the ground G, and includes a pile 4 a made of concrete and driven into the ground G.

  The tube body 2 is provided so as to rise from the first base portion 4 in the vertical direction. The cylinder body 2 is long so as to extend in the vertical direction. The cylinder 2 is, for example, a chimney cylinder. The cylinder 2 has a smoke exhaust duct 5 connected to a lower end portion thereof, and discharges gas sent from the smoke exhaust duct 5 from the upper end portion through the inside. The cylinder 2 may be a single member or may include a plurality of members.

  The lower end of the steel tower 3 is fixed to the second foundation part 6. The 2nd foundation part 6 connects the lower end of the steel tower 3 to the ground G, and includes the pile 6a comprised mainly by concrete and driven into the ground G. The detailed configuration of the second base portion 6 will be described later.

  The steel tower 3 is provided so as to rise in the vertical direction from the second base portion 6. The steel tower 3 is arranged around the cylindrical body 2. In the present embodiment, the steel tower 3 includes a trust structure. The steel tower 3 includes a plurality of vertical members 3a adjacent to the cylindrical body 2, a horizontal member 3b connected between the vertical members 3a, and a diagonal member 3c connected to at least one of the vertical member 3a and the horizontal member 3b. Including.

  A plurality of vertical members 3 a are arranged around the cylindrical body 2. The vertical member 3a is long so as to extend in the vertical direction. In the present embodiment, four vertical members 3 a are arranged around the cylinder 2 with the cylinder 2 as the center. The lower end of the vertical member 3 a becomes the lower end of the steel tower 3 and is fixed to the second foundation portion 6. The vertical member 3a includes a steel pipe. In addition, the vertical member 3a may include a shape steel.

  The cross member 3b is disposed so as to connect the vertical members 3a and 3a adjacent to each other in the horizontal direction. The cross member 3b is disposed so as to be parallel to the horizontal direction. In the horizontal direction, the cross member 3b is disposed so as to surround the cylindrical body 2. The cross member 3b includes a shape steel. The cross member 3b may include a steel pipe. A plurality of cross members 3b are arranged in the vertical direction, and in the present embodiment, seven (seven steps) are arranged in the vertical direction.

  The diagonal member 3c is disposed to be inclined with respect to the vertical member 3a and the horizontal member 3b. The diagonal member 3c is disposed so as to connect the vertical member 3a and the horizontal member 3b adjacent to each other in the vertical direction (vertical direction). The diagonal member 3c is arranged so as to connect the other diagonal member 3c and the vertical member 3a or the horizontal member 3b. The diagonal material 3c may be arranged so as to connect the vertical material 3a and the vertical material 3a adjacent in the horizontal direction. The diagonal member 3c may be disposed so as to connect the cross member 3b and the cross member 3b adjacent in the vertical direction (vertical direction). The diagonal 3c includes a section steel. The diagonal member 3c may include a steel pipe.

  The steel tower 3 configured in this manner is connected to at least a part of the side portion of the cylinder 2 and supports the cylinder 2 so as to suppress displacement in the horizontal direction. The steel tower 3 and the tube body 2 are connected by, for example, connecting the vertical member 3a or the cross member 3b and the side part of the tube body 2 in the horizontal direction in which the cross member 3b is provided by a shape steel or a steel pipe extending in the horizontal direction. .

  In the tower-like structure 1 described above, the seismic isolation device 7 is provided between the steel tower 3 that is the second structure and the second base portion 6.

  Here, as shown in FIGS. 1 and 2, the second foundation portion 6 includes a foundation body 6 </ b> A and a foundation housing 6 </ b> B.

  The base body 6A is made of concrete, and a bottom board 6Aa arranged in the horizontal direction and a standing wall 6Ab provided upright in the vertical direction at the periphery of the bottom board 6Aa are integrally formed. In the present embodiment, the bottom plate 6Aa is formed in a rectangular shape with the center removed so as to surround the first base portion 4 that fixes the tubular body 2 to the ground G. The upright wall 6Ab is provided continuously upward in the vertical direction and continuously to the entire inner periphery and the outer periphery of the bottom board 6Aa. Therefore, the base body 6A is formed in a box shape with the center coming off and the periphery opened upward by the bottom board 6Aa and the standing wall 6Ab. The foundation main body 6A is fixed to the ground G with the open end, which is the upper end of the standing wall 6Ab, buried in the ground G toward the surface (ground) of the ground G, and the pile 6a is provided on the lower surface of the bottom 6Aa.

  The foundation frame 6B is made of concrete and formed into a block shape, and is disposed inside the box-like body of the foundation body 6A. A plurality of foundation housings 6B are provided corresponding to the respective vertical members 3a of the steel tower 3, and the lower ends of the vertical members 3a are respectively fixed. In the present embodiment, four vertical members 3 a are arranged around the cylinder 2 around the cylinder 2, so that the foundation housing 6 </ b> B is around the first foundation 4 around the first foundation 4. Four are arranged in the horizontal direction. In addition, in the foundation chassis 6B, the foundation chassis 6B and the foundation chassis 6B adjacent in the horizontal direction are connected by a connecting material 6C. The connecting member 6C is arranged so as to surround the first base portion 4 in the horizontal direction in the box-shaped inside of the base body 6A. The connecting material 6C includes a shape steel and a steel pipe.

  The seismic isolation device 7 is provided between the foundation main body 6A and each foundation housing 6B in the second foundation portion 6. The seismic isolation device 7 has a restoring force between the base body 6A and the base housing 6B (steel tower 3), and a moving mechanism 7A that supports the base body 6B (steel tower 3) so as to move in the horizontal direction with respect to the base body 6A And a damping force mechanism 7C that applies a damping force between the foundation main body 6A and the foundation frame 6B (steel tower 3).

  The moving mechanism 7A is provided while the bottom plate 6Aa of the foundation main body 6A and the lower surface of the foundation chassis 6B are opposed to each other, receives the load in the vertical direction of the foundation chassis 6B (steel tower 3), and is provided with the foundation chassis 6B (iron tower 3). ) Is movably supported in the horizontal direction. For example, as shown in FIG. 2, the moving mechanism 7A is fixed to the upper surface of the bottom plate 6Aa of the base body 6A and extends in the horizontal direction, and is fixed to the lower surface of the base housing 6B in the horizontal direction. A so-called sliding bearing is applied in which a second rail member 7Ab extending long perpendicularly to the first rail member 7Aa is slidably provided in the extending direction. The moving mechanism 7A includes a sliding bearing and a rolling bearing having a configuration other than that shown in FIG. In addition, the moving mechanism 7A is configured to receive a pulling force generated on the foundation housing 6B side on the foundation body 6A side. For example, the first rail member 7Aa and the second rail member 7Ab move in the vertical direction. It is regulated.

  The restoring force mechanism 7B applies a restoring force that returns the foundation body 6A and the foundation frame 6B (steel tower 3) to the reference position. As shown in FIGS. 1 and 2, for example, a spring member that connects the standing wall 6Ab of the base body 6A and the side surface of the base housing 6B is applied to the restoring force mechanism 7B. This spring member is provided corresponding to each foundation housing 6B, and is arranged so as to generate elastic force (compression force or tensile force) in at least two directions orthogonal to each other in the horizontal direction. The spring member is based on the position where the relative displacement (displacement of movement by the moving mechanism 7A) between the foundation body 6A and the foundation frame 6B (steel tower 3) is stationary due to the balance of the respective elastic forces (compression force or tensile force). When the displacement is caused by the moving mechanism 7A, a restoring force is applied to return the displacement to the reference position by an elastic force. The spring member is fixed to each of the fixing members 6D (in the horizontal direction facing the base body 6A and the base housing 6B) while the bottom plate 6Aa of the base body 6A and the bottom surface of the base housing 6B are opposed to each other. (See FIG. 3).

  The damping force mechanism 7C applies a damping force that attenuates the relative displacement (displacement of movement by the moving mechanism 7A) between the foundation main body 6A and the foundation frame 6B (steel tower 3). For example, as shown in FIGS. 1 and 2, the damping force mechanism 7 </ b> C is a damper that connects the standing wall 6 </ b> Ab of the foundation body 6 </ b> A and the side surface of the foundation housing 6 </ b> B. An oil damper or a viscous damper is applied to the damper shown in FIGS. This damper is provided corresponding to each foundation housing 6B, and is disposed so as to generate a damping force in at least two directions orthogonal to each other in the horizontal direction.

  3 and 5 to 7 are enlarged cross-sectional views of other examples of the seismic isolation device in the tower structure according to the present embodiment. FIG. 4 is an enlarged plan view of another example of the seismic isolation device in the tower structure according to the present embodiment.

  3-7 has shown the example by which the seismic isolation apparatus 7 was arrange | positioned between the bottom board 6Aa of 6 A of foundation main bodies, and the lower surface of the foundation housing 6B.

  The seismic isolation device 7 shown in FIGS. 3 to 6 includes a support 7D and a damping force mechanism (damper) 7C.

  The bearing 7D shown in FIGS. 3 and 5 also serves as the moving mechanism 7A and the restoring force mechanism 7B described above, and is provided in the horizontal direction while the bottom panel 6Aa of the basic body 6A and the lower surface of the basic casing 6B face each other. This is a laminated rubber bearing in which rubber plates and steel plates are alternately laminated in the vertical direction.

  A bearing 7D shown in FIG. 6 serves as both the moving mechanism 7A and the restoring force mechanism 7B described above, and each steel plate facing in the vertical direction while the bottom panel 6Aa of the foundation body 6A and the lower surface of the foundation casing 6B are opposed to each other. This is a curved surface type ball rolling bearing in which a steel ball 7Db is sandwiched between the concave curved surface 7Da.

  The bearings 7D are arranged at a plurality of locations (four locations in FIG. 4) between the bottom plate 6Aa of the foundation main body 6A and the lower surface of the foundation casing 6B, and directly below the lower ends of the vertical members 3a so as to receive the load of the steel tower 3 evenly. It is preferable to arrange so as to surround the position.

  The damping force mechanism (damper) 7C shown in FIGS. 3, 4, and 6 is horizontal to the base body 6A side and the base housing 6B side while the bottom plate 6Aa of the base body 6A and the lower surface of the base housing 6B face each other. The fixing members 6D provided to face each other are connected to each other. An oil damper or a viscous damper is applied to the damping force mechanism (damper) 7C shown in FIGS. The damper is disposed so as to generate a damping force in at least two directions orthogonal to each other in the horizontal direction.

  The damping force mechanism (damper) 7C shown in FIG. 5 is a steel rod that is curved in advance on the base body 6A side and the base housing 6B side while the bottom plate 6Aa of the base body 6A and the lower surface of the base housing 6B face each other. It is a steel bar damper provided by being interposed and connected. Although not clearly shown in the drawing, the damping force mechanism (damper) 7C is curved in advance between the base body 6A side and the base housing 6B side while the bottom plate 6Aa of the base body 6A and the lower surface of the base housing 6B face each other. It may be a lead damper provided by being connected via a lead column. These steel bar dampers and lead dampers generate a damping force by plastic deformation. The steel bar damper and the lead damper include the combined use with the curved ball rolling bearing of FIG.

  The seismic isolation device 7 shown in FIG. 7 includes a damping rubber bearing 7E. The damping rubber bearing 7E serves as the moving mechanism 7A, the restoring force mechanism 7B, and the damping force mechanism 7C, and is provided by connecting the base body 6A side and the base housing 6B side. The damping rubber support 7E has, for example, a configuration in which a lead damper is inserted into a laminated rubber in which rubber plates provided in the horizontal direction are laminated in the vertical direction. The damping rubber bearings 7E are arranged at a plurality of locations (for example, four locations as in the bearing 7D shown in FIG. 4) between the bottom plate 6Aa of the foundation main body 6A and the lower surface of the foundation casing 6B, and the load on the tower 3 is evenly distributed. It is preferable to arrange so as to surround a position directly below the lower end of the longitudinal member 3a so as to receive.

  As described above, the tower-like structure 1 of the present embodiment is a cylinder 2 as a first structure extending in the vertical direction, and a second structure that is disposed at least partially around the cylinder 2 and supports the cylinder 2. The steel tower 3 as a two-structure body, the first foundation part 4 connecting the lower end of the cylinder 2 to the ground, the second foundation part 6 connecting the lower end of the tower 3 to the ground, the tower 3 and the second foundation part 6 And a seismic isolation device 7 provided between the two.

  According to this tower-like structure 1, the horizontal displacement due to the seismic external force with respect to the barrel 2 is absorbed by the seismic isolation device 7 through the steel tower 3, so that even a greatly designed earthquake external force is absorbed on the steel tower 3 side. can do. Moreover, since the tube body 2 is fixed to the first base portion 4 only at the lower end, the natural vibration is relatively long from the beginning, and the seismic isolation device 7 allows horizontal displacement due to the seismic external force on the tower 3. The suppression of the natural vibration of the original tube body 2 is eased to make the natural vibration longer. In other words, the seismic response is reduced by a countermeasure for extending the period with the seismic isolation device for the level 3 scale earthquake motion that is larger than the level 2 scale earthquake motion in the seismic design. In addition, if the lower end of the steel tower 3 is fixed to the 2nd foundation part 6 without providing the seismic isolation apparatus 7, the natural vibration of the cylinder 2 will shorten a period. As a result, the main members constituting the tube body 2 and the steel tower 3 can be reduced. Specifically, for example, the wall thickness of the cylindrical body 2 can be reduced, and the vertical members 3a, horizontal members 3b, and diagonal members 3c of the steel tower 3 can be thinned. Can be reduced in size and the manufacturing cost can be reduced. Moreover, conventionally, the tower-like structure of the present invention has an equivalent seismic isolation effect by isolating only the tower 3 while performing the base isolation for the entire structure (cylinder 2 + steel tower 3). An expansion joint that is conventionally required when piping or the like is connected to the tube body 2 can be obtained.

  Moreover, in the tower-like structure 1 of the present embodiment, the second foundation portion 6 includes a foundation frame 6B to which the lower end of the steel tower 3 is fixed, and a foundation body 6A that is fixed to the ground G. 7 is preferably provided between the foundation housing 6B and the foundation body 6A.

  According to this tower-like structure 1, when a horizontal displacement due to an earthquake external force occurs in the steel tower 3, a pulling force is applied to the steel tower 3 in the vertical direction, but this pulling force fixes the lower end of the steel tower 3. This can be suppressed by the foundation frame 6B. Moreover, the horizontal displacement due to the seismic external force can be absorbed by the seismic isolation device 7 provided between the foundation housing 6B and the foundation body 6A.

  Moreover, in the tower-like structure 1 of this embodiment, the seismic isolation device 7 includes the moving mechanism 7A that supports the steel tower 3 so as to be movable in the horizontal direction with respect to the second base part 6, and the second base part 6 and the steel tower. It is preferable to include a restoring force mechanism 7 </ b> B that applies a restoring force to 3, and a damping force mechanism 7 </ b> C that applies a damping force between the second foundation portion 6 and the steel tower 3.

  According to the tower-like structure 1, the effect of absorbing the horizontal displacement due to the earthquake external force with respect to the cylindrical body 2 can be remarkably obtained.

  Moreover, in the tower-like structure 1 of the present embodiment, the seismic isolation device 7 supports the steel tower 3 so as to be movable in the horizontal direction with respect to the second base part 6, and the second base part 6 and the steel tower 3. It is preferable to include a support 7 </ b> D that applies a restoring force therebetween and a damping force mechanism 7 </ b> C that applies a damping force between the second foundation portion 6 and the steel tower 3.

  According to this tower-like structure 1, the function of supporting the steel tower 3 so as to be movable in the horizontal direction with respect to the second base portion 6 by the support 7 </ b> D, and a restoring force between the second base portion 6 and the steel tower 3 are provided. The seismic isolation device 7 can be miniaturized and the installation range of the seismic isolation device 7 can be reduced.

  Moreover, in the tower-like structure 1 of this embodiment, the seismic isolation device 7 supports the steel tower 3 so as to be movable in the horizontal direction with respect to the second foundation part 6, and between the second foundation part 6 and the steel tower 3. It is preferable to include a damping rubber bearing 7E that applies a damping force between the second base portion 6 and the steel tower 3 while applying a restoring force to the steel tower 3.

  According to this tower-like structure 1, the function of supporting the steel tower 3 so as to be movable in the horizontal direction with respect to the second base part 6 by the damping rubber support 7 </ b> E, and the restoration between the second base part 6 and the steel tower 3. The function of applying a force and the function of applying a damping force between the second base portion 6 and the steel tower 3 can be achieved, the seismic isolation device 7 can be reduced in size, and the seismic isolation device 7 can be achieved. The installation range can be reduced.

  FIG. 8 is a side view of another example of the tower-like structure according to the present embodiment. As shown in FIG. 8, it is preferable that the tower-like structure 1 further includes a vibration control device 8 provided between the cylindrical body 2 as the first structure and the steel tower 3 as the second structure.

  The seismic control device 8 has the same configuration as the seismic isolation device 7 described above, and has a function of supporting the barrel 2 and the steel tower 3 so as to be relatively movable in the horizontal direction, and between the barrel 2 and the steel tower 3. And a function of applying a damping force between the tubular body 2 and the steel tower 3. As shown in FIG. 8, the seismic control device 8 is preferably provided at the upper end (top) of the steel tower 3 as shown in FIG. 8, but the seismic control performance is remarkable even when provided in the middle of the vertical direction. It is good in getting to.

  According to this tower-like structure 1, in addition to the above effects, excessive vibration of the cylinder 2 can be suppressed.

1 tower-like structure 2 cylinder (first structure)
3 Steel tower (second structure)
4 1st foundation part 6 2nd foundation part 6A foundation main body 6B foundation frame 7 Seismic isolation device 7A Movement mechanism 7B Restoring force mechanism 7C Damping force mechanism 7D Bearing 7E Damping rubber bearing 8 Damping device G Ground

Claims (6)

A first structure extending in a vertical direction;
A second structure that is disposed on at least a part of the periphery of the first structure and supports the first structure;
A first foundation connecting the lower end of the first structure to the ground; and
A second base portion connecting the lower end of the second structure to the ground;
A seismic isolation device provided between the second structure and the second foundation,
A tower-like structure comprising:   The second foundation part includes a foundation chassis in which a lower end of the second structure is fixed, and a foundation body fixed to the ground, and the seismic isolation device includes the foundation chassis and the foundation body. The tower-like structure according to claim 1, wherein the tower-like structure is provided between them.   The seismic isolation device provides a restoring force between the second base portion and the second structure, and a moving mechanism that supports the second structure so as to be movable in the horizontal direction with respect to the second base portion. The tower-like structure according to claim 1, comprising: a restoring force mechanism that acts; and a damping force mechanism that acts a damping force between the second base portion and the second structure. object.   The seismic isolation device supports the second structure movably in the horizontal direction with respect to the second base portion, and causes a restoring force to act between the second base portion and the second structure body. The tower-like structure according to claim 1, further comprising a support and a damping force mechanism that applies a damping force between the second base portion and the second structure.   The seismic isolation device supports the second structure so as to be movable in the horizontal direction with respect to the second foundation, and causes a restoring force to act between the second foundation and the second structure. However, the tower-like structure according to claim 1, further comprising a damping rubber bearing that applies a damping force between the second base portion and the second structure.   The tower structure according to claim 1, further comprising a vibration control device provided between the first structure and the second structure.

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