JP2006241783A - Damping structure for building - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a damping structure for a building which can suppress costs by sufficiently securing a freedom degree of a floor plan of a building and by reducing the number of members constituting the building, and also, can secure sufficient damping performance. <P>SOLUTION: The building 1 is provided with a rigid frame structure 10 constituting the building 1 and a continuous-layer earthquake resisting wall 20 provided in the rigid frame structure 10 independently from the rigid frame structure 10. The rigid frame structure 10 and the continuous-layer earthquake resisting wall 20 each have different vibration characteristics and are coupled with each other at one part or a plurality of parts via a damping device 50. The continuous-layer earthquake resisting wall 20 is provided with a vertically extended body part 21 and a projection part 22 projected from the body part 21 to the outer periphery. The lower face of the projection part 22 and the upper face on the outer peripheral side of the rigid frame structure 10 are coupled with each other by a rolling bearing 60 allowing both of them to relatively move in the horizontal direction and constraining the relative movement in the vertical direction. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a building vibration control structure, and more particularly to a building vibration control structure capable of ensuring sufficient earthquake resistance.

  Conventionally, in a high-rise building, when a large horizontal force due to seismic force or wind load is input, a large deformation occurs in the horizontal direction. Therefore, the number of columns and beams is increased, the cross section is enlarged, The horizontal force is borne by adopting the structure in which the multistory shear walls as elements are provided in the frame. However, if the number of pillars and beams is increased or the section is increased in this way, there is a problem that the room space in the building becomes narrow, which obstructs the plan and section plans of the building. In addition, even if a multi-layer earthquake resistant wall that bears a large force is adopted, the cross section of the earthquake resistant wall becomes large, which becomes an obstacle to the plan and sectional plans of the building as described above.

On the other hand, for example, in Patent Document 1, a giant beam called a top girder that induces bending deformation of a multi-layer earthquake-resistant wall is formed at the top of a core having a multi-layer earthquake-resistant wall. A structure is disclosed in which a top portion of an outer peripheral wall disposed around a core is connected via a vibration control device. According to such a structure, when an external force such as an earthquake is input, the core including the top girder bears the input external force on the lower floor, but bends and deforms on the upper floor. The seismic control device can absorb the building's seismic performance sufficiently, and the core absorbs much of the external force. Can be increased.
Japanese Unexamined Patent Publication No. 7-26786

  However, in such a structure, there is a problem that the top girder and the multistory earthquake-resistant wall constituting the core have to be considerably large in cross section, which increases the cost. On the other hand, the inventor of the present application proposes to connect a frame and a multi-layer earthquake-resistant wall via a vibration control device in a building having a frame and a multi-layer earthquake-resistant wall having different vibration characteristics ( Japanese Patent Application No. 2003-424525). According to such a building, since the frame and the multistory shear wall show different deformation modes, for example, by installing a vibration control device at a location where the deformation difference is large, the horizontal direction of the building can be efficiently Deformation can be suppressed to a small size, and the size and number of beams and columns constituting the frame can be reduced, thereby reducing the cost. However, for example, when the height of the building becomes very large, both the frame and the multistory shear wall may be bent in the same deformation mode. The damping effect is not always sufficient.

  The object of the present invention is to secure a sufficient degree of freedom in the floor plan of a building, to reduce the number of members constituting the building, to suppress the cost, and to suppress the vibration of the building that can secure sufficient vibration control performance. To provide a structure.

  The present invention provides a vibration control structure for a building, and the building includes a frame that constitutes the building, and an independent member element that is provided in the frame independently from the frame, and is independent from the frame. The member element has different vibration characteristics and is connected through a vibration control device at one or a plurality of locations, and the independent member element includes a main body portion extending in a vertical direction and an overhang projecting from the main body portion to the outer periphery. The lower surface of the overhanging portion and the upper surface of the frame are connected by a support device that allows relative movement in the horizontal direction and restrains relative movement in the vertical direction. Features.

  Here, for the frame and independent member elements having different vibration characteristics, for example, the following combinations are conceivable. That is, a combination of a rigid frame and a multistory earthquake resistant wall, a combination of a steel structure and a reinforced concrete structure or a steel reinforced concrete structure, a combination of rigid frame structures having different rigidity, and the like. Moreover, the combination of a steel frame and a brace frame or a steel plate earthquake-resistant wall frame is also conceivable. In addition, as the vibration control device, a vibration control device such as a viscous damper, a viscoelastic damper, a friction damper, or a hysteretic damper can be used. Moreover, it is good also as what combined these damping devices. Moreover, as said support apparatus, a rolling bearing (roller) is applicable, for example.

  According to the present invention, the support device that allows relative movement in the horizontal direction and restrains relative movement in the vertical direction between the lower surface of the projecting portion that projects from the main body portion to the outer periphery and the upper surface of the frame. Since they are connected, the vibration mode of the frame and the independent member element can be surely different. For this reason, for example, even if the number of seismic control devices is small, the seismic control effect can be efficiently achieved simply by placing and connecting seismic control devices at locations where the deformation difference between the frame and the independent member element is relatively large. It is possible to suppress the horizontal deformation of the building. In this way, sufficient seismic performance can be ensured with a relatively simple structure, so the dimensions and number of beams and pillars that make up the frame can be reduced, the degree of freedom in planning the building can be secured sufficiently, and the cost can be reduced. Can be suppressed.

  Here, the overhang portion may be provided on the top portion of the main body portion. Moreover, the said support apparatus is good also as arrange | positioning between the lower surface of the outer peripheral side edge part of the said overhang | projection part, and the upper surface of the outer peripheral side of the said frame. Moreover, the said vibration control apparatus may be installed in the location where the deformation | transformation difference of the said frame and the said independent member element becomes large when external force is input. According to such a configuration, the horizontal deformation of the building can be efficiently attenuated.

  According to the vibration control structure of a building of the present invention, it is possible to reduce costs by reducing the number of members constituting the building while ensuring a sufficient degree of freedom in building plan planning. There is an effect that seismic performance can be secured.

Hereinafter, a building vibration control structure according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a vertical cross-sectional view schematically showing a vibration control structure of a building according to the present embodiment. 2 is a cross-sectional view taken along the line II-II in FIG. FIG. 3 is a plan view of the building as viewed from above. 4 is an enlarged cross-sectional view showing a portion A of FIG. As shown in FIG. 1, a building 1 includes a ramen frame 10 as a frame composed of columns 11 and beams 12, and a multi-layer earthquake resistance as an independent member element provided in the ramen frame 10 and independent of the ramen frame 10. And a wall 20.

  As shown in FIG. 2, the frame structure 10 includes a column 11 and a beam 12, and a floor plate 13 is provided in a rectangular plane 10 </ b> A formed by the adjacent column 11 and beam 12. The ramen frame 10 is formed such that the dimensions of the columns 11 and the beams 12 are smaller than those of a conventional general frame structure, and the number of the columns 11 and the beams 12 is reduced. For this reason, the room space etc. which are provided in the ramen frame 10 can be sufficiently secured, and the degree of freedom in space design is improved. The rigid frame 10 is constructed so as to be less rigid than the multi-layer seismic wall 20, and the rigid frame 10 and multi-layer seismic wall 20 have different vibration characteristics with respect to external forces.

  As shown in FIGS. 1 and 3, the multistory seismic wall 20 includes a main body portion 21 extending in the vertical direction and an overhang portion 22 projecting to the outer periphery at the top of the main body portion 21. Further, as shown in FIG. 1, the main body 21 and the rigid frame 10 are directly coupled to each other at a coupling point 40. The coupling point 40 is provided for the purpose of adjusting the natural period of the building 1 so that the building 1 does not resonate with the period of earthquake motion that is likely to occur in the construction site where the building 1 is constructed. In addition, as shown in FIG. 4, a vibration control device 50 is attached between the rigid frame 10 and the main body 21. The seismic control device 50 is installed at a location where the deformation difference between the rigid frame 10 and the main body portion 21 is maximized in the building 1 after the natural period adjustment in consideration of the natural period adjustment by the coupling point 40.

  FIG. 5 is an enlarged longitudinal sectional view showing a portion where the rigid frame 10 and the main body 21 are coupled via the vibration control device 50. As shown in FIG. 5, between the rigid frame 10 and the main body portion 21, there are provided a non-bonded portion A that is independent of each other and is connected to each other via a vibration control device 50. It has been. In the unbonded portion A, the main body portion 21 is formed with beam portions 21X that protrude from the front and back surfaces 21A and 21B, and the floor plate 13A is adjacent to the beam portions 12 and 12 that are separated from the beam portion 21X. It is supported by two small beams 14 and 14 which are bridged between them. In addition, in the joint portion B, the beam portion 15 is integrally formed on the floor plate 13B.

  The vibration control device 50 includes an oil damper 51 disposed between the beam portion 15 provided on the upper floor plate 13B and the beam portion 21X of the main body portion 21 and the adjacent upper floor plate 13B via the main body portion 21. A sliding bearing 52 is provided so as to connect them together, and rolling bearings 53 are disposed between the front and back surfaces 21A, 21B of the main body 21 and the beam section 15, respectively.

  The oil damper 51 is configured to be extendable and contractible in the vertical direction, and has a function of attenuating vibrations caused by seismic force or wind load. The sliding support 52 is formed on the main body 21, an angle member 521 attached to the upper surface of the adjacent floor plate 13 </ b> B, a sliding member 522 disposed between the vertical portion 521 </ b> A of the angle member 521 and the main body 21. A disc spring 523 that tightens the angle member 521 and the sliding member 522 across the main body 21 via the long hole is provided. The long hole is formed so as to extend in a direction orthogonal to the paper surface of FIG. The disc spring 523 can appropriately determine the slip strength of the sliding member 522 by appropriately changing the tightening force. The rolling support 53 is slidable along the front and back surfaces 21A and 21B of the main body 21, and does not slide in the direction orthogonal to the front and back surfaces 21A and 21B, that is, in the left-right direction in FIG. It is configured to transmit force in the direction.

  Further, as shown in FIG. 1, between the lower surface of the overhanging portion 22 and the upper surface of the outer peripheral portion of the rigid frame 10, for example, a rolling bearing 60 as a supporting device having the same configuration as the rolling bearing 53 described above. Is provided. The rolling bearing 60 can be freely slid only in the horizontal direction and is not slid in the vertical direction. For this reason, it is comprised so that the force to a perpendicular direction can be transmitted.

  When a small horizontal force such as a wind load is applied to such a building 1, the clamping force by the disc spring 523 is set in advance as desired, so that the magnitude up to the set slip resistance is set. Because the sliding member 522 does not slip and the rigid frame 10 and the multistory seismic wall 20 are integrated to improve the rigidity of the building 1, the building 1 does not have minute vibrations and has sufficient housing. Can be secured. On the other hand, when a horizontal force such as strong wind or seismic force greater than the slip resistance by the disc spring 523 is applied, the sliding member 522 starts to slide, so that the ramen frame 10 and the multi-layer earthquake resistant wall 20 are independent. It vibrates in different deformation modes (vibration characteristics). At this time, since the rolling support 53 is installed between the main body portion 21 and the beam portion 15 of the floor plate 13B, and the left and right floor plates 13B adjacent to each other are connected via the main body portion 21, the horizontal direction is set. Power can be transmitted reliably. For this reason, the pressing force which acts on the sliding material 522 can be stabilized.

  FIG. 6 is a diagram schematically showing a deformation mode of the multistory shear wall 20 when an earthquake force acts on the building. FIG. 6A restricts sliding in the vertical direction by the rolling bearing 60. (B) has shown the case where the sliding to the vertical direction by the rolling bearing 60 is restrained. As shown in FIG. 6 (A), when the rolling bearing 60 is not provided, the multi-layer seismic wall 20 is deformed with great bending deformation when a large horizontal force such as seismic force acts on the building 1. It becomes a mode. On the other hand, as shown in FIG. 6B, when the rolling bearing 60 is provided to restrain the fluctuation in the vertical direction, the multi-layer seismic wall 20 has a deformation mode having an antipolar point in the middle portion in the height direction. It becomes. On the other hand, the ramen frame 10 exhibits a deformation mode in which bending deformation is large and excellent. For this reason, when a horizontal force such as seismic force acts on the building 1, the frame structure 10 and the multistory seismic wall 20 show different deformation modes, so that they are installed at locations where the deformation difference is the largest. The vibration control device 50 can effectively exert the vibration control function and can impart sufficient vibration control to the building 1.

  FIG. 7 is a diagram showing horizontal displacement (cm) on each floor when seismic force is applied to the building. (A) shows the building 1 and (B) shows the sliding support from the building 1. A comparison target with 60 removed is shown. As shown in FIG. 7, it can be seen that the building 1 has a small amount of displacement on almost all floors as compared with the comparison object, and can exhibit sufficient seismic control performance.

  FIG. 8 is a diagram showing the frequency (Hz) and acceleration (gal) in the direction horizontal to or perpendicular to the wind direction when a wind load is applied to the building. □) shows the case of the building 1, and (◯) in the figure shows the case of the comparison target with the sliding bearing 52 removed from the building 1. As shown in FIG. 8, in the wind load in the direction perpendicular to the wind direction, the building 1 is 3.1 gal and the habitability evaluation is H2, whereas the comparison target is 4.5 gal and the habitability evaluation is H3. Yes. Moreover, in the wind load in the direction parallel to the wind direction, the building 1 is 2.15 gal and the habitability evaluation is H1, while the comparison target is 3.2 gal and the habitability evaluation is H2. For this reason, it turns out that the building 1 can ensure sufficient amenity with respect to the wind load of any direction.

According to this embodiment, there are the following effects.
(1) After the ramen frame 10 and the multistory earthquake-resistant wall 20 are configured to have different vibration characteristics, an overhanging part 22 projecting to the outer periphery is formed on the multistory earthquake-resistant wall 20, and the bottom surface of the overhanging part 22 The rolling support 60 is installed between the outer frame and the upper surface of the outer frame of the rigid frame 10 so that the horizontal frame is allowed to slide while the vertical frame is restrained. The deformation mode of the multistory seismic wall 20 can be made different. At this time, since the vibration control device 50 is installed at a location where the deformation difference between the rigid frame 10 and the multistory shear wall 20 becomes large, even with a small number of vibration control devices 50, an effective vibration control effect can be exhibited, and the deformation of the building 1 Can be kept small. In this way, sufficient seismic performance can be ensured with a relatively simple configuration, so that the number of use points and dimensions of the members constituting the ramen frame 10 and the multistory seismic wall 20 can be reduced, and the degree of freedom in plan planning of the building 1 can be reduced. Sufficiently secured and cost for construction of the building 1 can be suppressed.

  (2) Since the rolling support 60 is installed between the lower surface of the outer peripheral side end portion of the overhanging portion 22 and the upper surface of the outer peripheral side of the rigid frame structure 10, the deformation difference between the rigid frame structure 10 and the multi-layer earthquake resistant wall 20 is the greatest. Therefore, the horizontal deformation of the building 1 can be efficiently attenuated.

  (3) Since the sliding bearing 52 and the oil damper 51 are installed in parallel between the rigid frame 10 and the multistory shear wall 20, the sliding bearing 52 acts on a small horizontal force such as wind load. The oil damper 51 acts on a large horizontal force such as an earthquake force. For this reason, while the habitability of the building 1 with respect to a wind load can be improved, the seismic force input into the ramen frame 10 can fully be reduced.

  (4) Since the rolling bearings 53 are installed between the front and back surfaces 21A, 21B of the main body 21 constituting the multi-layer earthquake-resistant wall 20 and the floor boards 13B, the force introduced into the sliding bearings 52 is made substantially constant. As a result, the vibration control performance of the building 1 can function as designed.

  (5) Since the joint 40 is appropriately formed and joined between the rigid frame 10 and the multistory earthquake-resistant wall 20 so that the building 1 does not resonate with the period of earthquake motion that is likely to occur in the construction site. The external force input to the building 1 can be reduced. Moreover, since the ratio of the horizontal force which the frame structure 10 and the multistory earthquake-resistant wall 20 bear can be changed freely by setting the coupling | bond part 40 suitably, the freedom degree of design of the building 1 can be improved.

  In addition, this invention is not limited to the said embodiment. For example, in the above-described embodiment, the oil damper and the sliding bearing are employed in the vibration control device 50. However, the present invention is not limited to this, for example, a viscous damper other than the oil damper, a viscoelastic damper, a hysteretic damper, or a combination thereof. A seismic control device such as a bowl can be used.

  Further, in the embodiment, the frame and the independent member element are the ramen frame 10 and the multistory earthquake-resistant wall 20, but not limited thereto, for example, a structure of steel structure and reinforced concrete structure or steel reinforced concrete structure, Low rigid frame structure and high rigid frame structure can be adopted. Moreover, it is good also as a structure made into a steel frame and a brace frame or a steel plate earthquake-resistant wall frame.

  Moreover, as shown in FIG. 9, you may employ | adopt the damping device 100 of the structure which removed the rolling support 53 from the damping device 50. FIG. The vibration control device 100 includes an oil damper 51 and a sliding bearing 110. The sliding support 110 is formed on the floor plate 13B, the angle member 521 attached to the upper surface of the adjacent floor plate 13B, the sliding member 522 disposed between the horizontal portion 521B of the angle member 521 and the upper surface of the floor plate 13B. A disc spring 523 that tightens the angle member 521 and the sliding member 522 through a long hole is provided. The long hole is formed so as to extend in a direction perpendicular to the paper surface of FIG. The disc spring 523 can appropriately determine the slip strength of the sliding member 522 by appropriately changing the tightening force. By adopting such a configuration, the oil damper 51 and the sliding bearing 110 can be installed in parallel between the rigid frame 10 and the multistory earthquake-resistant wall 20, and therefore the same effect as (3) of the above embodiment. Can be played.

  In addition, in the said embodiment etc., in order to respond | correspond to a wind load etc., the slip support 52,110 was provided in the damping device 50, However It does not need to provide in particular. Moreover, in the said embodiment, you may install a seismic isolation apparatus in the bottom part of the ramen frame 10. FIG.

It is a longitudinal cross-sectional view which shows typically the vibration control structure of the building which concerns on embodiment of this invention. It is a cross-sectional view of II-II in FIG. It is the top view which looked at the said building from the upper part. It is a cross-sectional view which expands and shows the A section of FIG. It is a longitudinal cross-sectional view which shows the state with which the ramen frame and the main-body part were couple | bonded via the damping device. It is the figure which shows typically the deformation mode of the multistory shear wall when the seismic force acts on the building, (A) shows the case where the sliding to the vertical direction by the rolling bearing is not restrained (B) has shown the case where the sliding to the vertical direction by a rolling bearing is restrained. When a seismic force acts on a building, it is a figure which shows the displacement to the horizontal direction in each floor, (A) shows a building, (B) has shown the comparison object which removed the sliding bearing from the building. . It is a figure which shows the frequency and acceleration to a direction horizontal or perpendicular | vertical to a wind direction when a wind load acts on a building. It is a longitudinal cross-sectional view which shows the state with which the rigid frame and the main-body part were couple | bonded through the damping device which concerns on the modification of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Building 10 Ramen frame 10A Rectangular plane 11 Column 12 Beam 13 (13A, 13B) Floor board 14 Small beam 15, 21X Beam part 20 Multistory earthquake-resistant wall 21 Main body part 21A, 21B Front and back surface 22 Overhang part 40 Joint 50,100 Damping device 51 Oil damper 52 Sliding bearing 53 Rolling bearing 60,110 Rolling bearing (supporting device)
521 Angle material 521A Vertical portion 521B Horizontal portion 522 Sliding material 523 Belleville spring A Non-bonded portion B Combined portion

Claims (4)

The building's seismic control structure,
The building includes a frame constituting the building, and an independent member element provided in the frame independently from the frame,
The frame and the independent member element have different vibration characteristics and are connected via a vibration control device at one place or a plurality of places,
The independent member element includes a main body portion extending in a vertical direction, and a projecting portion projecting from the main body portion to the outer periphery,
The lower surface of the overhanging portion and the upper surface of the frame are connected by a support device that allows relative movement in the horizontal direction and restrains relative movement in the vertical direction. Damping structure. In the building vibration control structure according to claim 1,
The overhanging portion is provided at the top of the main body, and is a building vibration control structure. In the building vibration control structure according to claim 1 or 2,
The building control system according to claim 1, wherein the support device is arranged between a lower surface of an outer peripheral side end portion of the overhang portion and an upper surface of the outer peripheral side of the frame. In the earthquake-damping structure of the building according to any one of claims 1 to 3,
The building damping system according to claim 1, wherein the damping device is installed at a location where a deformation difference between the frame and the independent member element increases when an external force is input.

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