JP5089946B2 - Seismic control structure of a connected building - Google Patents

Description

  The present invention belongs to the technical field of a seismic control structure for a connected building formed by connecting a plurality of buildings to each other by connecting beams.

  When vertical (vertical) earthquake motion acts on a building, tensile force is generated on the pillars and piles of the building. To cope with this, it was necessary to construct a high-strength structure such as increasing the cross section of pillars and piles. In addition, if the building has a seismic isolation structure, tensile force is generated in the seismic isolation layer. To cope with this, there is a technology that uses a laminated rubber body for long-term loads that supports the weight of the building and a laminated rubber body for preventing overturning that resists pulling due to the overturning moment in the seismic isolation layer. However (see, for example, Patent Documents 1 and 2), the tensile force acts on the pillars and foundations of the building, and the pillars and foundations need to be constructed to a certain degree of strength.

  Thus, in order to cope with vertical ground motion, the building must be uniformly constructed with a high-strength structure, and the design is performed when the cost is very high and excessive tensile force is applied. The reality is that more economical and safer countermeasures are desired, such as being impossible. However, the technology for constructing individual buildings with high-strength structures is naturally limited in terms of cost and structural mechanics.

  Then, the technique which concerns on the connection building which connects the building of several buildings via a connection material attracts attention (for example, refer patent document 3). This patent document 3 discloses a technique that effectively exhibits a damping effect against vibration in a horizontal plane in an arbitrary direction by connecting adjacent buildings with an energy absorbing mechanism such as an oil damper. .

  In this way, if the vertical ground motion acting on the building can be reduced by using the connecting material, it is not necessary to enlarge the cross section of the pillars and piles more than necessary. It is obvious that it is possible to provide a safer building in terms of structural design as well as contributing to reduction.

Japanese Patent No. 2631486 Japanese Utility Model Publication No. 6-18996 JP 11-270188 A

Japanese Patent No. 2631486 Japanese Utility Model Publication No. 6-18996 Japanese Patent Laid-Open No. 11-270188

  It is an object of the present invention to reduce (suppress) vertical seismic motion acting on the building by devising the structure of the connecting beam that connects the buildings, in terms of economy, safety, and comfort. It is to provide an excellent seismic control structure for connected buildings.

As means for solving the problems of the background art, the vibration control structure for a linked building according to the invention described in claim 1 is:
It is a vibration control structure of a connected building that consists of multiple buildings connected to each other by connecting beams,
The connecting beam has a natural period in the vertical direction matched to a natural period in the vertical direction of the building, and has a mass and rigidity that easily resonates with the building. A damper member is provided that absorbs energy due to vertical deformation of the connecting beam accompanying the vertical earthquake motion of the building.

  According to a second aspect of the present invention, in the vibration control structure for a connected building according to the first aspect, the connecting beam is formed of a truss structure, and corresponds to a lower chord member or an upper chord member at both ends of the truss structure. A damper member is provided at the site.

  According to a third aspect of the present invention, in the vibration control structure for a connected building according to the first or second aspect, a plurality of connecting beams are provided at intervals in the height direction of the building.

  According to a fourth aspect of the present invention, in the vibration-damping structure for a connected building according to any one of the first to third aspects, the damper member is small in an oil damper, a steel damper, a viscoelastic damper, or a damper for large amplitude. It is a composite damper formed by connecting amplitude dampers in series.

  The invention described in claim 5 is the seismic structure of the linked building according to any one of claims 1 to 4, wherein each of the buildings of the plurality of buildings is configured as a base isolation structure. Features.

The seismic structure of a connected building according to any one of claims 1 to 5 includes a connecting beam 2 (12 associated with a vertical earthquake motion of the building 1 at a connecting portion between the end of the connecting beam 2 (12) and the building 1. The damper member 3 for absorbing energy due to the deformation in the vertical direction is provided, and the connecting beam 2 has a weight and rigidity to act as a mass damper. Therefore, when the vertical period of the connecting beam 2 is adjusted to the natural period of each vertical direction of the building 1, when the vertical ground motion acts on the building, the connecting beam 2 shakes more than the building 1, and the connecting beam The damper members 3, 3... Provided between the building 2 and the building 1 can resonate according to the vibration of the building by alternately repeating expansion and contraction, and as a result, act on the building 1. It can absorb and reduce (suppress) vertical ground motion.
Therefore, it is not necessary to build a structural frame consisting of columns, beams, etc. with high strength compared to the prior art, which can contribute to cost reduction and provide a safer building in terms of structural design. . Therefore, it is excellent in economic efficiency and safety. In addition, along with this, pillars, beams, core frames, etc. can be slimmed down, so that a living space with excellent viewability and daylighting can be realized.

  The seismic control structure for a linked building according to the present invention is implemented as follows in order to achieve the above-described effects.

1A and 1B schematically show a seismic control structure for a linked building according to claim 1 in a simplified manner. This connected building seismic control structure is a connected building seismic control structure in which a plurality of buildings 1 and 1 are connected to each other by a connecting beam 2. The connecting beam 2 is shown in FIGS. Thus, the natural period in the vertical direction is matched to the natural period in the vertical direction of the building 1 and has mass and rigidity that easily resonates with the building 1, and at the connecting portion between the end and the building 1, A damper member 3 is provided that absorbs energy due to vertical deformation of the connecting beam 2 accompanying the vertical earthquake motion of the building 1 (invention according to claim 1).
In addition, although the said building 1 is implemented with a high-rise building, it can implement similarly in a low-rise building. Incidentally, in the illustrated example, a building having a width dimension (site area) of about 20 m × 20 m and a height of about 140 m is assumed.

  The seismic control structure according to the illustrated example is an example of two buildings 1 and 1, and as shown in FIGS. 1A and 1B, when the side surfaces of the two buildings 1 and 1 are viewed in a planar direction. Are connected by a pair of parallel connecting beams 2 and 2. Further, when viewed in the front direction, the pair of connecting beams 2 and 2 are provided with a plurality (three in the illustrated example) at predetermined intervals in the height direction of the buildings 1 and 1 (invoice). Item 3). The arrangement and the number of the connecting beams 2 are not limited to the illustrated example, and can be appropriately changed depending on the rigidity and shape of the building 1 or the performance of the damper member 3 to be used. By the way, in this embodiment, a 42-story building 1 is assumed, and the connecting beam 2 is provided on the 15th, 26th and 37th floors. In addition, the place where the connecting beam 2 is provided is to provide a resident's rest space by constructing a concrete floor using the connecting beam 2 and providing planting, a garden, etc. For example, the weight and rigidity necessary for the connecting beam 2 to act as a mass damper are given to the space.

As shown in FIGS. 2A and 2B, the connecting beam 2 according to the present embodiment has a truss structure, and a damper member 3 is provided at a portion corresponding to the lower chord material at both ends of the truss structure. (Invention of Claim 2). The portion except the damper member 3 in the truss structure is implemented by a steel member 4 such as H-section steel. Therefore, one end of the damper member 3 is firmly rigidly connected to a column beam joint (or a steel column or steel beam) on the side surface of the building 1 by a joining means such as a bolt or welding. The part is also firmly rigidly connected to the end of the steel frame member 4 by a joining means such as a bolt or welding (not shown).
The connecting beam 2 uses a total of four damper members 3 for each connecting beam 2. However, the number of the connecting beams 2 is not limited to this, and the number is appropriately increased or decreased depending on the structure of the connecting beam 2. Is possible. In the present embodiment, the connecting beam 2 is implemented with a truss structure. However, the present invention is not limited to this, and a connecting beam having no truss structure composed of H-shaped steel or the like can be implemented in substantially the same manner. The same technical idea applies to Example 2 below.

  Further, the connecting beam 2 is preferably implemented by a structural design having a weight and rigidity so that the vertical period of the connecting beam 2 substantially matches the vertical period of the buildings 1 and 1. As for the structural design of the connecting beam 2, it is most effective to match the natural period in the vertical direction of the buildings 1, 1 and the vertical period of the connecting beam 2. It should be noted that the structure is designed so that the period matches the period that tends to resonate with the buildings 1 and 1 (easy to shake).

  The damper member 3 according to the present embodiment uses an oil damper. In addition to the oil damper, a composite type in which a small amplitude damper is connected in series to a steel damper, a viscoelastic damper, or a large amplitude damper. It is preferable that the damper is appropriately selected and applied according to the structural design (the invention according to claim 4).

  Therefore, according to the seismic control structure of the connected building having the above configuration, when vertical ground motion acts on the connected buildings 1 and 1, the buildings 1 and 1 swing up and down, and the connecting beam 2 is shown in FIGS. As described above, the damper members 3 and 3 provided at the portions corresponding to the lower chord members at both ends can resonate in response to the vibration in the vertical direction of the building by alternately repeating expansion and contraction, and as a result The vertical ground motion acting on the building 1 can be absorbed and reduced (suppressed). Therefore, it is not necessary to build a structural frame consisting of columns, beams, etc. with high strength compared to the prior art, which can contribute to cost reduction and provide a safer building in terms of structural design. . Therefore, it is excellent in economic efficiency and safety. In addition, along with this, the pillars, beams, or core frame can be slimmed (see FIG. 4B), so that it is possible to realize a living space with excellent viewability and daylighting.

  In addition, although illustration is abbreviate | omitted, about the said connection beam 2, although the damper member 3 is provided and implemented in the site | part corresponded to the lower chord material in the both ends of a truss structure in this Example, it is not limited to this, By changing the design of the mounting position of the structural member 4 of the truss structure, the damper member 3 can be provided in the portion corresponding to the upper chord material at both ends of the truss structure, and substantially the same operational effects are obtained (claims). Item 2).

FIG. 5 shows a different embodiment of the seismic control structure for a linked building according to claim 1. The seismic control structure of this connected building is mainly different from the first embodiment in that three buildings 1 are provided.
That is, the seismic control structure of a connected building according to the second embodiment is a connected building seismic control structure in which three buildings 1 are connected to each other by a connecting beam 12, and is shown in a plan view in FIG. As described above, the connecting beam 12 is provided with a damper member 3 at the connecting portion between the end of the connecting beam 12 and the building 1 to absorb energy caused by the vertical deformation of the connecting beam 12 caused by the vertical earthquake motion of the building 1. In addition, it has a weight and rigidity to act as a mass damper (invention of claim 1). Incidentally, the code | symbol 5 in FIG. 5A has shown the reinforcement beam which connected the adjacent connection beams 12 and 12 with sufficient balance.

  As shown in FIG. 5, the seismic structure for a linked building according to the second embodiment is implemented by arranging three buildings 1 in a balanced manner at a portion substantially corresponding to the apex of an equilateral triangle. The building 1 is assumed to be a building 1 having a width (site area) of about 20 m × 20 m and a height of about 140 m, as in the first embodiment. Also in this second embodiment, assuming a 42-story building 1, the connecting beams 12 are provided on the 15th, 26th, and 37th floors (see FIG. 1B). In addition, the place where the connecting beam 2 is provided is a construction of a concrete floor using the connecting beam 12, providing a space for residents to relax, such as planting or gardening, or installing equipment. For example, the weight and rigidity necessary for the connecting beam 12 to act as a mass damper are given to the space. Further, in this second embodiment, a vast concrete floor having a substantially regular hexagonal shape can be constructed by effectively using the connecting beam 12 and the reinforcing beam 5, and therefore, a larger occupant compared to the first embodiment. A relaxing space can be provided.

  The connecting beam 12 according to the present embodiment is configured by a truss structure as in the first embodiment, and the damper member 3 is provided at a portion corresponding to the lower chord material at both ends of the truss structure (claim). Item 2). In addition, since the method etc. which connect the said damper member 3 and the building 1 are the same as that of the said Example 1, the description is omitted.

  However, as shown in FIG. 5, the connecting beam 12 according to the second embodiment is different in the length of the left and right truss structures because the three buildings are connected in a symmetrical manner in a balanced manner. We are carrying out. Among them, the long-side connecting beam 12a is implemented with the configuration shown in FIG. 6A, and a small-amplitude damper is connected in series to a large-amplitude damper as a damper member 3 at positions corresponding to lower chords at both ends. It is carried out by a composite damper (so-called broadband damper) 3 that is coupled to the above. On the other hand, the short-side connecting beam 12b is implemented by the configuration shown in FIG. 6B, and is implemented by the oil damper 3 as the damper member 3 at positions corresponding to the lower chord material at both ends thereof. In addition, the damper member 3 can be applied by appropriately selecting a steel damper and a viscoelastic damper according to the structural design in the same manner as in the first embodiment (the invention according to claim 4).

  Therefore, according to the seismic control structure of the connected building having the above configuration, when vertical ground motion acts on the connected buildings 1, 1, 1, the buildings 1, 1, 1 swing up and down, and adjacent buildings in the building 1. The connecting beam 12 connecting the 1 and 1 behaves substantially as shown in FIGS. 3A and 3B, as in the first embodiment. That is, the damper members 3, 3... Provided at the portions corresponding to the lower chord members at both ends of the connecting beam 12 can resonate in response to vibrations in the vertical direction of the building by alternately repeating expansion and contraction. As a result, the vertical ground motion acting on the building 1 can be absorbed and reduced (suppressed). Further, the seismic control structure of the connected building connecting the three buildings according to the second embodiment is structural mechanical compared to the control structure of the connecting building connecting the two buildings according to the first embodiment. In addition, a more stable structural frame can be realized. Therefore, it is not necessary to build a structural frame consisting of pillars, beams, etc. with high strength compared to the conventional technology, so it can greatly contribute to cost reduction and provide a safer building in terms of structural design. it can. Therefore, it is excellent in economic efficiency and safety. In addition, along with this, the pillars, beams, or core frame can be slimmed (see FIG. 4B), so that it is possible to realize a living space with excellent viewability and daylighting.

  The embodiments have been described with reference to the drawings. However, the present invention is not limited to the illustrated embodiments, and design modifications and application variations that are usually made by those skilled in the art are within the scope of the technical idea of the invention. Note that it includes the range.

  For example, in the first and second embodiments, the vibration control structure of a connected building in which two or three buildings are connected is used, but the present invention is not limited to this. Even a seismic structure can be implemented in substantially the same manner by arranging the building symmetrically in a well-balanced manner.

  In addition, if each building 1 is provided with a base isolation layer on its foundation and an isolator such as laminated rubber and a metal or viscous damper is installed in the base isolation layer, it will be more stable. The above-described structural frame can be realized (the invention according to claim 5).

  Furthermore, in the present embodiment, the buildings 1, 1... Are implemented with substantially the same size and shape, so that the damper members 3 are provided at both ends of the connecting member 2 (12). When the deformation of the building is different in each building, such as when the structural weight of any one of the inventions is significantly increased, the damper member 3 is provided only at the end of the building on which the deformation is large. In some cases, it may be sufficient to provide (the invention of claim 1).

A is the top view which showed schematically the vibration control structure of the connection building which concerns on Example 1, B is the same elevation. A is the front view which showed the connection beam which concerns on Example 1, B is B BB sectional view taken on the line of A. FIG. A and B are front views showing the behavior of the connecting beam when vertical deformation is applied to the building. FIG. 4A is a plan view illustrating a core frame according to the related art, and FIG. 4B is a plan view illustrating a core frame according to the first embodiment (second embodiment). It is the top view which showed the vibration control structure of the connection building which concerns on Example 2. FIG. A and B are front views showing a truss structure in the connecting beam according to the second embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Building 2 Connection beam 3 Damper member 4 Steel members, such as H-section steel (truss component)
5 Reinforcement beam 12 (12a, 12b) Connection beam

Claims (5)

It is a vibration control structure of a connected building that consists of multiple buildings connected to each other by connecting beams,
The connecting beam has a natural period in the vertical direction matched to a natural period in the vertical direction of the building, and has a mass and rigidity that easily resonates with the building. A seismic control structure for a connected building, characterized in that a damper member is provided to absorb energy due to vertical deformation of the connecting beam caused by vertical ground motion of the building.   The connecting building according to claim 1, wherein the connecting beam is configured by a truss structure, and damper members are provided at portions corresponding to the lower chord member or the upper chord member at both ends of the truss structure. Seismic control structure.   3. The vibration control structure for a connected building according to claim 1, wherein a plurality of connecting beams are provided at intervals in the height direction of the building.   4. The damper member according to claim 1, wherein the damper member is an oil damper, a steel damper, a viscoelastic damper, or a composite damper in which a small amplitude damper is connected in series to a large amplitude damper. Seismic control structure of a linked building described in 1.   The seismic control structure for a linked building according to any one of claims 1 to 4, wherein each of the buildings of the plurality of buildings has a base portion configured as a seismic isolation structure.

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