JP4572535B2 - Building seismic control structure - Google Patents

Description

  The present invention relates to a building vibration control structure and a building vibration control method.

  Conventionally, high-rise buildings are subject to large horizontal deformations when large horizontal forces due to seismic forces or wind loads are input, so the number of columns and beams can be increased, or the cross-section can be increased. The horizontal force was borne by adopting a structure in which a multi-layer earthquake-resistant wall as an earthquake-resistant element was installed in the frame. However, if the number of columns or 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-story shear wall that bears a large force is adopted, the cross section of the shear wall becomes large, and as described above, it has become an obstacle to the plan and cross section plans of buildings.

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. I was able to increase.
Japanese Unexamined Patent Publication No. 7-26786

However, in such a structure, the top girder and the multistory earthquake-resistant wall that constitute the core must be configured to have a considerably large cross section, and there is a problem that the cost for the construction of a high-rise building increases.
An object of the present invention is to provide a seismic control structure for a building capable of reducing cost by reducing the number of members constituting the building, while sufficiently securing the seismic performance of the building and the floor plan of the building. The purpose is to provide a vibration control method for buildings.

The present invention is a seismic control structure of a building, and the building is a frame that constitutes the building, and an independent member element that is a multi-layer earthquake-resistant wall or a brace frame provided in the frame independently from the frame. The frame and the independent member element have different vibration characteristics and are connected to each other through a vibration control device at one or a plurality of locations, and the independent member element has a horizontal direction within the plane. It is possible to move in the vertical direction, and the movement in the out-of-plane direction is constrained by the frame .
Here, as the frame and the independent member element having different vibration characteristics, the following cases can be considered. That is, in the case of a ramen frame and multi-story earthquake-resistant wall, in the case of a steel frame and brace frame or a steel plate earthquake-resistant wall frame.
Moreover, as a damping device, a viscous damper, a viscoelastic damper, a friction damper, a hysteresis type damper, an oil damper, and other damping devices can be adopted. Moreover, it is good also as what combined these damping devices.

  According to the present invention, the frame and the independent member element having different vibration characteristics and the independent member element provided independently of the frame in the frame are provided. Each of them shows a different deformation mode. For this reason, for example, it is a configuration in which the vibration control device is simply arranged and connected at a location where the deformation difference between the frame and the independent member element is relatively large. The horizontal deformation of the building can be kept small. That is, sufficient seismic performance can be imparted to 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 making up the frame can be reduced, so that the degree of freedom in building plan planning can be sufficiently secured, and the building The cost of construction can be reduced.

Here, before Symbol Damping device is preferably a friction damper or historical damper.
Moreover, it is preferable that the said vibration control apparatus is 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, since the horizontal deformation of the building can be efficiently attenuated, the number of installed vibration control devices can be reduced, so that further cost reduction can be achieved.

Further, the frame and the independent member element may be directly coupled to each other at a location different from the location connected via the vibration control device.
According to such a structure, the building rigidity which affects the natural period of a building can be freely set by a designer's intention by selecting a connection location arbitrarily. For this reason, for example, it is input to the building by adjusting the natural period of the building including the frame and the independent member element so that the building does not resonate with the period of earthquake motion that is highly likely to occur in the construction site. External force can be reduced. Moreover, since the ratio of the horizontal force which a frame and an independent member element bear can be changed freely by selecting a coupling | bond part suitably, the freedom degree of building design can be improved.

  According to the building seismic control structure of the present invention, the seismic performance of the building and the degree of freedom of the floor plan of the building can be sufficiently secured, and the cost can be reduced by reducing the number of members constituting the building. There is an effect.

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 longitudinal sectional view schematically showing a building vibration control structure according to an embodiment of the present invention. FIG. 2 is a cross-sectional view schematically showing the vibration control structure of the building. 3 is an enlarged cross-sectional view of a portion A surrounded by a broken line in FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG.
As shown in FIG. 1, the vibration control structure 2 of the building 1 is provided with a ramen frame 10 as a frame composed of columns 11 and beams 12, and is provided in the ramen frame 10 independently of the ramen frame 10. In addition, a multi-layer seismic wall 20 as an independent member element, and a friction damper 30 as a seismic control device for connecting the rigid frame 10 and the multi-layer seismic wall 20 at a plurality of locations are provided.

  The ramen frame 10 constituting the building 1 is configured to have a lower rigidity than the multi-layer earthquake resistant wall 20. That is, the ramen frame 10 is formed with smaller dimensions of the columns 11 and beams 12 and the number of points of these columns 11 and beams 12 compared to a conventional general frame structure. As a result, a sufficient space in the building such as a living room space provided in the ramen frame 10 is secured, and the degree of freedom in space design is improved. In addition, as shown in FIG. 2, in the rigid frame 10, a floor plate 13 is provided in a rectangular plane 10 </ b> A formed by adjacent columns 11 and beams 12. Thus, since the rigidities of the rigid frame 10 and the multi-layer earthquake resistant wall 20 are different, the rigid frame 10 and the multi-layer earthquake resistant wall 20 have different vibration characteristics with respect to external force.

  As shown in FIGS. 2 and 3, the multi-layer seismic wall 20 is configured to be separated from the ramen frame 10 and independently inside the ramen frame 10 constituting the building 1. Specifically, as shown in the detailed structure in FIG. 4, in the building 1, two small beams 14, 14 are spanned between adjacent beams 12, 12 (FIG. 3), and these small beams 14, 14. The floor board 13 is supported above. Then, by forming a multi-layer seismic wall 20 independent of the rigid frame 10 between the floor plates 13, 13, the multi-layer seismic wall 20 independent of the rigid frame 10 is formed. With such a configuration, the multi-layer seismic wall 20 can move in the wall width direction (vertical direction in FIG. 2) and in the vertical direction (perpendicular direction in FIG. 2), but in the wall thickness direction (horizontal direction in FIG. 2). ) Movement is restricted.

  Further, as shown in FIG. 1, the rigid frame 10 and the multistory earthquake-resistant wall 20 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.

The friction damper 30 is appropriately installed at a location where the deformation difference between the ramen frame 10 and the multistory seismic wall 20 is maximized in the building 1 after the natural cycle adjustment in consideration of the natural cycle adjustment by the coupling point 40 described above. ing.
As shown in FIG. 3, the friction damper 30 is disposed between the floor plate 13 and the front and back surfaces 20 </ b> A and 20 </ b> B of the multistory earthquake resistant wall 20. More specifically, as shown in FIG. 4, the friction damper 30 includes a base plate 31 joined to the front and back surfaces 20 </ b> A and 20 </ b> B of the multi-layer earthquake resistant wall 20, and the surface 31 </ b> A of each base plate 31 and the small beam 14. The friction plate 32 having an L-shaped cross section that abuts on the upper surface 14A, the rib member 33 that connects the surface 32A of the friction plate 32 and the end portion 13A of the floor plate 13, and the base plate 31 and the friction with the multi-layer earthquake resistant wall 20 interposed therebetween. A disc spring 34 for fastening the plate 32 is provided. When an external force is input to the multi-layer seismic wall 20, the contact portion between the base plate 31 and the friction plate 32 slides in the direction perpendicular to the paper surface in FIG. 4 and the vertical direction in FIG. The building 1 can cope with deformation in the horizontal direction and deformation in the vertical direction.

  In the seismic control structure 2 of the building 1 as described above, when external force such as seismic force is input, the vibration characteristics of the ramen frame 10 and the multistory shear wall 20 are different. 20 shows the following behavior. That is, the frame structure 10 is deformed in the horizontal direction according to the shearing force applied to the building 1, so that a large interlayer horizontal deformation occurs in the low-rise part and a horizontal interlayer deformation becomes small in the high-rise part. On the other hand, the multistory earthquake-resistant wall 20 has a small interlayer deformation at the lower layer part and a large interlayer deformation by a bending deformation at the higher layer part. Here, since the ramen frame 10 and the multistory shear wall 20 are configured independently, the multistory seismic wall 20 is not affected by the surrounding ramen frame 10. Horizontal interlayer deformation becomes even greater. In addition, when the frame structure 10 is deformed to the right side due to the difference in vibration characteristics, the multistory earthquake-resistant wall 20 may be deformed to the left side. Since the friction damper 30 is disposed in such a large deformation difference, a large deformation occurs in the friction damper 30 to increase the damping effect, and the building 1 is provided with a sufficient damping function.

The present embodiment has the following effects.
(1) Since the rigid frame 10 and the multistory earthquake-resistant wall 20 having different vibration characteristics are configured independently, the rigid frame 10 and the multistory earthquake-resistant wall 20 exhibit different deformation modes. At this time, since the friction damper 30 is disposed at a position where the difference in vibration characteristics between the rigid frame 10 and the multi-layer seismic wall 20 is the largest, that is, the deformation difference between the rigid frame 10 and the multi-layer seismic wall 20 is maximum. Even with a small number of friction dampers 30, an effective vibration control effect can be exhibited, and deformation of the building 1 can be suppressed to a small level. Since sufficient seismic performance can be secured with such a relatively simple configuration, the number of members used and the dimensions of the members constituting the rigid frame 10 and the multi-layer seismic wall 20 can be reduced. Sufficiently secured and cost for construction of the building 1 can be suppressed.

  (2) Since the friction damper 30 that slides in the horizontal direction and the vertical direction is installed between the front and back surfaces 20A and 20B of the multi-layer earthquake resistant wall 20 and the floor plates 13 and 13, the building 1 is installed in the horizontal direction. In addition to deformation, it can also handle vertical deformation.

  (3) Since the joint 40 is appropriately formed and joined between the rigid frame 10 and the multi-layer 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, Other structures etc. which can achieve the objective of this invention are included, The deformation | transformation etc. which are shown below are also contained in this invention. For example, in the above-described embodiment, the vibration characteristics of the rigid frame 10 and the multi-layer earthquake resistant wall 20 are adjusted by partially connecting the rigid frame 10 and the multi-layer earthquake resistant wall 20 at a plurality of locations. The vibration characteristics of the rigid frame 10 and the multistory seismic wall 20 may be adjusted by changing the top configuration to change the top stiffness. Specifically, for example, as shown in FIG. 5, an extension part 101 is formed by extending the top part of the multi-layer earthquake resistant wall 20 to the outer periphery, and the extension part 101 and the rigid frame 10 are connected to the friction damper 30. The structure which joins via can be employ | adopted. Further, for example, as shown in FIG. 6, the top of the building 1 includes a ramen frame 10 and a multistory earthquake resistant wall 20, and a friction damper 30 is provided between the top of such a configuration and the top of the multistory earthquake resistant wall 20. It is good also as a structure joined via.

  In the above embodiment, the friction damper is adopted as the damping device. However, the invention is not limited thereto, and for example, a viscous damper, a viscoelastic damper, a hysteretic damper, an oil damper, and other damping devices can be adopted. A configuration in which a plurality of seismic control devices are selected and combined can also be employed. Specifically, as shown in FIG. 7 and FIG. 8, as the seismic control structure 2 of the building 1, a base plate 31 is joined to the front and back surfaces 20 </ b> A and 20 </ b> B of the multi-layer seismic wall 20. A viscoelastic body or viscous body 102 is disposed at 31A, and a plate member 103 having an L-shaped cross section is disposed to be joined to the viscoelastic body or viscous body 102 and the upper surface 14A of the small beams 14 and 14, and a floor panel is disposed on the plate member 103. 13 is installed. Furthermore, as shown in FIG. 7, the structure which joins between the both ends 20X and 20Y of the multi-layer earthquake-resistant wall 20 and the pillars 11 and 11 with the viscoelastic body or the viscous body 102 is employable. Even in such a configuration, the same effects as those of the above-described embodiment can be obtained.

  Further, as shown in FIG. 9, as the seismic control structure 2 of the building 1, two multi-layer earthquake resistant walls 20 are joined to the front and rear surfaces 12A and 12B of the beam 12 via the viscoelastic body 104. The structure which joins the surface of the layer earthquake-resistant wall 20 and the floor board 13 via the viscoelastic body 104 is employable. Even in such a configuration, the same effects as those of the above-described embodiment can be obtained.

Further, in the above embodiment it has an independent member elements as Frame ramen Frame 10 and Shear wall 20 is not limited to this, for example, and iron bone forming and braced frames or steel shear wall Frames structure It is good.

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 which shows typically the vibration control structure of the said building. It is a cross-sectional view which expands and shows the part A enclosed with the broken line of FIG. FIG. 4 is a sectional view taken along line IV-IV in FIG. 3. It is a longitudinal cross-sectional view which shows the modification of the damping structure of the said building partially. It is a longitudinal cross-sectional view partially showing another modification of the vibration control structure of the building It is a cross-sectional view partially showing another modification of the vibration control structure of the building It is sectional drawing of IX-IX of FIG. It is a cross-sectional view partially showing another modification of the vibration control structure of the building

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Building 2 Damping structure 10 Ramen frame as a frame which comprises a building 20 Multistory earthquake-resistant wall as an independent member element 30 Friction damper which is a damping device 40 Joint location

Claims (4)

The building's seismic control structure,
The building includes a frame that constitutes the building, and an independent member element that is a multi-layer seismic wall or a braced frame provided independently from the frame in 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 is movable in a horizontal direction and a vertical direction in the plane thereof, and is configured such that movement in the out-of-plane direction is restricted by the frame. . In the building vibration control structure according to claim 1 ,
The seismic control structure of a building is a friction damper or a hysteretic damper. In the vibration control structure of the building according to claim 1 or 2 ,
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. In the building vibration control structure according to claim 3 ,
The building seismic damping structure, wherein the frame and the independent member element are directly coupled to each other at a place different from a place where the frame and the independent member element are connected via the damping device.