JP2009197501A - Vibration control structure for building - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration control structure for a building, which can positively improve the damping performance of the multistory building. <P>SOLUTION: The vibration control structure A is provided for the multistory building, and girders of a peripheral portion 6 on part or all of stories of the building are constituted of outrigger trusses 11 which are each arranged in a manner striding upward and downward a reference height H of a floor surface 12a of each story. Each outrigger truss 11 is formed by incorporating a vibration control damper 13 in a top chord 11a or a bottom chord 11b. Preferably the vibration control damper 13 of the outrigger truss 11 is arranged at an end of the top chord 11a or the bottom chord 11b connected to a column 10 of the building. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vibration control structure of a multi-layered building such as a condominium or an office building.

Conventionally, multi-layered buildings (high-rise buildings) such as condominiums and office buildings have a core part on the inside of the building that consists of reinforced concrete seismic walls and steel braces that bear most of the seismic force that acts during an earthquake, There exists what built the outer peripheral part as steel structure (for example, refer patent document 1).
Japanese Patent Laid-Open No. 11-44120

  However, in the building 1 constructed as described above, for example, as shown in FIG. 5, particularly when the core portion 2 is continuously formed from the upper layer to the lower layer (from the upper floor to the lower floor), When the seismic damper 3 is installed in order to suppress the deformation at the time of the earthquake and the seismic damper 3 is used as a seismic control frame, the arrangement of the seismic damper 3 is the core part 2 due to the restrictions on the building plan. Or it is often limited around the core part 2. For this reason, when a very large seismic force is applied, the burden on the core 2 or the damping damper 3 and the anti-seismic elements (steel braces, etc.) 4 installed around the core 2 increases, and the pillar 5 of the core 2 In addition, a large axial force acts on the edge portion and a large overall bending occurs in the core portion 2.

  That is, as shown in FIG. 6, extremely large vertical stress on the compression side acts on the lowermost column 5, and there is a possibility that the vertical stress on the tension side may lift. Further, in the upper layer, the entire bending deformation is dominant, and it becomes difficult to suppress the deformation by the core part 2 or the damping damper 3 installed around the core part 2 or the steel brace 4 of the anti-seismic element. . Therefore, considering that a very large seismic force acts, there is a limit to the seismic control structure that processes most of the seismic force only by the core portion 2. The anti-seismic element is, for example, a seismic control element that plastically deforms to exhibit an energy absorbing function when subjected to a predetermined axial force, and exhibits a proof strength by staying within the elastic deformation range even if the seismic control element is plastically deformed. This refers to those that have seismic elements.

  On the other hand, in the frame surface 6a of the outer peripheral portion 6 shown in FIG. 5, a damping damper 7 such as a stud damper 7 (see FIG. 7A), a brace damper 8 (see FIG. 8A), a beam end damper, or the like. , 8 are installed so as not to obstruct the view from the inside of the room, and the seismic dampers 7 and 8 are deformed together with the deformation of the frame in the event of an earthquake to absorb the seismic force (FIG. 7 (b), FIG. 8 ( b)), that is, it is conceivable to improve the seismic performance of the entire building 1 by applying the seismic force to the outer peripheral portion 6 as well. However, even in this case, as shown in FIG. 9, when the seismic force is applied, due to the influence of the deflection on the beam 9 side where the damping damper (intercolumn damper 7) is installed, The deformation contribution amount (deformation amount) of the vibration control damper 7 is reduced, and there is a problem that the vibration control effect is not sufficiently exhibited and the vibration control efficiency is poor.

  In view of the above circumstances, an object of the present invention is to provide a building vibration control structure capable of reliably improving the vibration control performance of a multilayer structure building.

  In order to achieve the above object, the present invention provides the following means.

  The vibration control structure of a building according to the present invention is a vibration control structure of a multi-layered structure, and a large beam on the outer peripheral portion of a part or all layers of the building is located above a reference height of a floor surface of each layer. And an outrigger truss provided so as to straddle the lower chord, and the outrigger truss is formed by providing a damping damper on the upper chord material or the lower chord material.

  In the present invention, by forming the large beam on the outer peripheral portion of a part or all of the layers (floors) of the building with the outrigger truss, the apparent beam formation is increased and the rigidity can be increased. And by providing an outrigger truss with a large beam and high rigidity in this way, the amount of deformation of the damping damper provided in the upper chord material or lower chord material of the outrigger truss with respect to the interlayer displacement during an earthquake ( The deformation contribution) can be increased, and the damping performance of the damping damper can be reliably exhibited. As a result, the seismic force is reliably borne by the seismic damper of the outrigger truss, that is, the seismic damper provided on the outer periphery, compared to the seismic control structure in which the seismic damper and anti-seismic elements are concentrated only in the core. It becomes possible.

  At this time, the outrigger truss is provided so as to straddle the upper and lower sides with the reference height of the floor surface of each layer interposed therebetween. By appropriately adjusting the beam formation of the outrigger truss, that is, the upper chord arranged in the upper layer By appropriately adjusting the position of the material and the position of the lower chord material arranged in the lower layer, the outrigger truss can be provided without obstructing the view from the upper layer or the lower layer room.

  In the building vibration control structure of the present invention, it is desirable that the vibration damper is provided at an end portion of the upper chord member or the lower chord member connected to the pillar of the building.

  In the present invention, it is possible to reliably prevent a large axial force from acting on the column by providing the damping damper at the end of the upper chord member or the lower chord member connected to the column.

  Furthermore, in the vibration control structure for a building according to the present invention, it is more desirable that the outrigger truss is disposed outside the outer wall of the building.

  In this invention, by arranging the outrigger truss on the outside of the outer wall, the indoor space of each layer is not interfered by the outrigger truss, and it is possible to suitably maintain the indoor environment and improve the vibration control performance. Become.

  According to the building vibration control structure of the present invention, the outer girder is composed of the outrigger truss equipped with the vibration damper, so that the vibration damper and anti-seismic elements are concentrated only on the core part. Compared with, the seismic damper of the outrigger truss can surely bear the seismic force, and the seismic performance of the building can be improved with certainty. Further, at this time, it becomes possible to disperse and arrange a large number of vibration control dampers, thereby improving the vibration control efficiency.

  Hereinafter, a vibration control structure according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3.

  First, the building 1 of this embodiment is a multi-layered building such as a condominium or an office building, for example, like the buildings shown in FIGS. 5 and 6, and the outer peripheral portion 6 has a pillar 10 as shown in FIG. 1. And a beam (large beam) are integrally formed, and a core portion 2 made of a reinforced concrete seismic wall, a steel brace, or the like is provided inside the outer peripheral portion 6. Further, a damping damper 3 and an anti-seismic element (such as a steel brace) 4 are installed around the core portion 2 or around the core portion 2.

  And in this embodiment, as shown in FIG.1 and FIG.2, the large beam of the outer peripheral part 6 of the one part or all the layers (floor) of the building 1 pinches | interposes the reference height H of the floor surface 12a of each layer. It is comprised by the outrigger truss 11 provided so that it might straddle upward and downward. That is, in the outer peripheral portion 6, the upper beam connected to the column 10 is an upper chord material 11 a, and the upper beam connected to the column 10 and the lower layer is a lower chord material 11 b, and the upper chord material 11 a and the lower chord An outrigger truss 11 formed by connecting the material 11b with the diagonal material 11c is installed. In addition, the outrigger truss 11 may be configured to include, in addition to the upper chord member 11a, the lower chord member 11b, and the diagonal member 11c, an intermediate pillar member that extends in the vertical direction and connects the upper chord member 11a and the lower chord member 11b.

  Further, the outrigger truss 11 is provided with a damping damper 13 on the lower chord member 11b, and the damping damper 13 is connected to both pillars 10 forming the frame surface 6a and provided at both ends of the lower chord member 11b. It has been.

  Further, in the present embodiment, as shown in FIG. 3, the beam formation of the outrigger truss 11 is appropriately adjusted, that is, the position of the upper chord material 11a arranged in the upper layer and the position of the lower chord material 11b arranged in the lower layer are set. The outrigger truss 11 is installed within a range that is appropriately adjusted and does not hinder the view from the upper and lower rooms.

  Further, in the building 1 according to this embodiment having the outer trigger 6 provided with the outer trigger truss 11 as described above, as shown in FIG. 3, the small beam 14 is connected to the column 10 at one end and extends inside the building 1. The floor plate 12 is provided so as to be supported by the small beam 14. Furthermore, in this embodiment, the outer wall 16 is installed outside the outrigger truss 11.

  And the core part 2, the damping damper 3 and the anti-seismic element 4 installed around the core part 2 or the core part 2, and the outrigger truss 11 provided with the damping damper 13 of the building of this embodiment The damping structure A is constructed.

  In the building vibration control structure A of the present embodiment configured as described above, a large beam of the outer peripheral portion 6 is formed by configuring the large beam of the outer peripheral portion 6 of a part or all of the layers of the building 1 with the outrigger truss 11. The beam formation of the (outrigger truss 11) is increased and the rigidity is increased. For this reason, the deformation amount (deformation contribution) of the damping damper 13 provided in the lower chord material 11b of the outrigger truss 11 becomes large with respect to the interlayer displacement due to the seismic force applied during the earthquake. As a result, the vibration control performance of the vibration control damper 13 of the outrigger truss 11 is surely exhibited, and compared with the conventional vibration control structure in which the vibration control damper 3 and the anti-seismic element 4 are concentrated only on the core 2. Then, the seismic force is surely absorbed by the damping damper 13 of the outrigger truss 11.

  At this time, since the damping damper 13 is provided at the end of the lower chord member 11b connected to the column 10, it is reliably prevented that a large axial force acts on the column 10.

  Therefore, according to the vibration control structure A of the building of the present embodiment, the large beam of the outer peripheral portion 6 is constituted by the outrigger truss 11 provided with the vibration control damper 13, so that the vibration control damper 3 and the antiseismic element 4 are cored. Compared with the seismic control structure concentrated only on the part 2, the seismic force can be reliably borne by the seismic damper 13 of the outrigger truss 11 as well. Thereby, it becomes possible to improve the damping performance of the building 1 reliably. Moreover, by providing the damping damper 13 on the outrigger truss 11 in this way, many damping dampers 13 can be dispersedly arranged not only around the core portion 2 or the core portion 2 of the building 1 but also around the outer peripheral portion 6. It becomes possible, and it becomes possible to improve seismic control efficiency.

  Further, by providing the outrigger truss 11 so as to straddle the upper and lower sides with the reference height H of the floor surface 12a of each layer interposed therebetween, the beam formation of the outrigger truss 11 is appropriately adjusted, that is, arranged in the upper layer. By appropriately adjusting the position of the upper chord material 11a and the position of the lower chord material 11b disposed in the lower layer, the outrigger truss 11 is provided to suppress the vibration control performance of the building 1 without obstructing the view from the upper and lower layer rooms. It becomes possible to improve.

  As mentioned above, although one Embodiment of the vibration control structure of the building which concerns on this invention was described, this invention is not limited to said embodiment, In the range which does not deviate from the meaning, it can change suitably. For example, in the present embodiment, the outer wall 16 is provided outside the outrigger truss 11, but the outrigger truss 11 may be provided outside the outer wall 16 as shown in FIG. In this case, the surface of the window glass installed on the outer wall 16 and the occupant can be brought closer to each other than in this embodiment, and the indoor space of each layer is not interfered by the outrigger truss 11, It becomes possible to maintain the environment suitably and improve the vibration control performance.

  Moreover, in this embodiment, although the damping damper 13 of the outrigger truss 11 shall be provided in the edge part of the lower chord material 11b, you may provide in the edge part of the upper chord material 11a. Furthermore, if it is possible to improve the vibration control performance with certainty, it is not necessary to limit to the end portions of the upper chord material 11a and the lower chord material 11b.

It is a figure which shows the damping structure of the building which concerns on one Embodiment of this invention. It is the figure which expanded the outrigger truss of the vibration control structure of the building shown in FIG. FIG. 3 is a view taken along line X1-X1 in FIG. It is a figure which shows the modification of the damping structure of the building which concerns on one Embodiment of this invention which installed the outrigger truss in the outer side of the outer wall. It is a figure which shows the damping structure of the conventional building which installed the damping damper or the anti-seismic element in the core part. It is a figure which shows the bending deformation of a core part, and the action state of axial force at the time of an earthquake force acting on the damping structure of the conventional building which installed the damping damper or the anti-seismic element in the core part. It is a figure which shows the state which installed the stud pillar damper in the frame of the conventional outer peripheral part. It is a figure which shows the state which installed the cane damper on the frame of the conventional outer peripheral part. It is a figure which shows the state of a deformation | transformation at the time of the earthquake of the stud damper installed in the frame of the conventional outer peripheral part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Building 2 Core part 3 Damping damper of core part 4 Anti-seismic element of core part 5 Column of core part 6 Peripheral part 6a Construction surface 7 Intermediary pillar damper 8 Brace damper 9 Beam of outer part (large beam)
DESCRIPTION OF SYMBOLS 10 Outer peripheral pillar 11 Outrigger truss 11a Upper chord material 11b Lower chord material 11c Diagonal material 12 Floor board 12a Floor 13 Outrigger truss damping damper 14 Beam 15 Orthogonal beam 16 Outer wall A Building damping structure H Reference height

Claims (3)

It is a seismic control structure for multi-layered buildings,
The outer girder of the outer periphery of a part or all the layers of the building is composed of an outrigger truss provided so as to straddle the upper and lower sides across the reference height of the floor surface of each layer,
A seismic damping structure for a building, wherein the outrigger truss is formed with a damping damper on an upper chord member or a lower chord member. In the vibration control structure of a building according to claim 1,
A building damping structure, wherein the damping damper is provided at an end of the upper chord member or the lower chord member connected to the pillar of the building. In the vibration control structure of the building according to claim 1 or 2,
A building vibration control structure, wherein the outrigger truss is disposed outside an outer wall of the building.

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