JP5032232B2 - Building - Google Patents

Description

  The present invention relates to an improvement of a building, and more particularly to a building having a plurality of floors, in which the horizontal rigidity of a lower floor is made smaller than the horizontal rigidity of an upper floor, and a damper device is provided on the lower floor.

The following has been proposed as a so-called soft fast story type building in which the horizontal rigidity of the lower floor is smaller than the horizontal rigidity of the upper floor supported by the lower floor.
Patent Document 1 discloses a vibration control frame structure that is arranged on the upper floor of a high-damping frame part and joined with a high-rigidity frame part having a plurality of floors, and the high-damping frame part is provided with an energy absorbing device. It is composed of a predetermined multiple floors, and a high-rigidity frame part is composed of a frame with multi-layered damping walls, and the horizontal rigidity of the high-rigidity frame part is larger than the horizontal rigidity of the high-damping frame part. ing.
Further, in Patent Document 2, in a building having a plurality of floors, the horizontal rigidity of the lower floor is made smaller than the horizontal rigidity of the upper floor supported by the lower floor, and the hardening type viscosity is applied to the lower floor. A building in which a damper is provided to absorb vibration energy is described.
Japanese Patent Laid-Open No. 2002-4628 JP 2006-316573 A

However, in the inventions of Patent Document 1 and Patent Document 2, the basic structure of the soft fast story type building in which the horizontal rigidity of the lower floor is made smaller than the horizontal rigidity of the upper floor and the vibration energy is absorbed in the lower floor. Although it is disclosed, there is a concrete disclosure on how to actually make the horizontal rigidity of the lower floor smaller than that of the upper floor, or how to arrange the damper for absorbing vibration energy. However, there is a demand for a technology that can realize such a soft fast story building with high efficiency. In addition, the conventional example described above is limited to the application of the soft fast story type to general buildings, and there is a technology that can realize a unique appearance as a building and a functional floor configuration on a lower floor. It is requested.
In view of the above, an object of the present invention is to efficiently construct a building having a high damping property by adopting a soft fast story and to realize a unique appearance and functional configuration.

The invention of claim 1 includes a plurality of floors, wherein the horizontal rigidity of the lower floors is made smaller than the horizontal rigidity of the upper floors, and a damper device is provided on the lower floors. At least one vertical plane arranged toward the lower floor, and a portion of the vertical plane that forms the lower floor is a vertical column erected on the ground as a structural member and the vertical column The damper device comprises a substantially Y-shaped column member comprising two oblique columns extending obliquely upward from the tip of the vertical composition plane and joined to a portion forming the upper floor, The base portion is connected to the vertical column standing portion on the ground, and is arranged obliquely upward in the vertical composition plane, and is connected to the lower end of the upper floor portion and arranged in a substantially V shape. A building characterized by two rod-shaped dampers Thing is.
In the present invention, in order to make the horizontal rigidity in the lower layer portion smaller than the horizontal rigidity in the upper floor, a substantially Y-shaped support member is disposed on the lower floor of the vertical construction surface. In addition, in order to efficiently attenuate the vibration of the building in both the compression and tension directions, two brace-type damper devices were arranged in a V-shape. Moreover, in order to make the external appearance of a building unique, it is possible to expose two brace-type damper devices arranged in a substantially Y shape on the outer wall of the building and in a V shape.
According to a second aspect of the present invention, in the building according to the first aspect, the upper floor of the vertical composition plane is provided with a diagonal column that connects the columns and beams constituting the vertical composition plane in a substantially X shape as structural members. It is characterized by that.
In the present invention, in order to efficiently increase the horizontal rigidity in the upper floor, a substantially X-shaped oblique column is disposed on the upper floor of the vertical construction surface. Moreover, in order to make the external appearance of a building unique, a substantially X-shaped diagonal column can be exposed on the outer wall of the building.

The invention according to claim 3 is the building according to claim 1 or 2, wherein the horizontal rigidity of the lower floor is 0.8 or less of the horizontal rigidity of the upper floor. This value 0.8 is a value that can meet the regulations (0.6 or more) of the Building Standard Law for general buildings and can reduce the rigidity in the lower layer to such an extent that a soft fast story can be realized. .
Invention of Claim 4 is the building as described in any one of Claim 1 thru | or 3, The natural period T of the said building is 1 second or more and 5 seconds or less, It is characterized by the above-mentioned. This value was set to 1 second or more so as not to coincide with the general earthquake period, and if the vibration period exceeded 5 seconds, the habitability was adversely affected.
The invention according to claim 5 is the building according to any one of claims 1 to 4, wherein an equivalent attenuation constant h of the building is 0.03 or more and 1.00 or less. Here, the damping constant is a value representing the degree to which the vibration is attenuated by the friction of the member, the friction inside the material, and the dissipation of energy to the ground when the building vibrates. In a normal steel structure, the value is 0.02. In the present invention, this value is set to a larger value.

A sixth aspect of the present invention is the building according to any one of the first to fifth aspects, wherein the damper device absorbs 30% or more of the kinetic energy of the entire building. If it is less than 30%, the vibration energy of the building cannot be absorbed quickly by the damper device. In order to attenuate the vibration of the building, the damper device absorbs 30% or more of the kinetic energy of the entire building.
Invention of Claim 7 is the building as described in any one of Claims 1 thru | or 6. The corner pillar which comprises the both ends of the said vertical composition surface is arrange | positioned only in the said upper floor part. Features. In order to make the horizontal rigidity of the lower floor of the building smaller than the horizontal rigidity of the upper floor, and to make the appearance of the building unique and to realize a functional floor structure on the lower floor, the corner pillar is only on the upper floor Arranged not to be placed on lower floors.
The invention according to claim 8 is the building according to any one of claims 1 to 7, characterized in that it has two opposing vertical construction surfaces.

  The building according to the present invention includes at least one vertical plane arranged from the upper floor to the lower floor, and a portion of the vertical floor that forms the lower floor is substantially Y-shaped. Since the lower floor is equipped with two damper devices, it is possible to achieve lower horizontal rigidity in the lower floor than in the upper floor of the vertical construction plane. It is possible to concentrate deformation and kinetic energy due to vibration, and to absorb this kinetic energy with two rod-shaped dampers. Therefore, according to the present invention, a soft fast story building can be efficiently realized, and a substantially Y-shaped support member and a substantially V shape are arranged on the lower floor portion of the vertical construction surface of the building. By displaying the bar-shaped damper, the appearance of the building can be made unique and a functional floor structure on the lower floors can be realized.

Hereinafter, the building concerning the best example for carrying out the present invention is explained based on a drawing. 1 is a perspective view showing a framework structure of a building according to an embodiment, FIG. 2 is an enlarged perspective view showing a framework structure of a lower floor of the building shown in FIG. 1, and FIG. 3 is a building shown in FIG. It is a figure which shows the framework structure of a thing, (a) is an elevation view of a vertical surface, (b) is a front view of an orthogonal surface.
The steel structure 10 of the building according to this example is configured as a multi-story floor (11 floors in this example). Further, in the building, the steel structure 10 is formed of a lower floor 10L up to the third floor and an upper floor 10H up to the fourth floor to the tenth floor, and the horizontal rigidity of the lower floor 10L is higher than the horizontal rigidity of the upper floor 10H. Is also made smaller. A damper device is arranged on the lower floor 10L. As a result, the building achieves a soft fast story.

Hereinafter, the steel structure 10 of a building will be described in detail. In this example, the steel frame structure 10 is disposed on a foundation frame (not shown) constructed on the ground B. In addition, the steel structure 10 is constructed of four vertical planes 10A, 10B, 10C, and 10D using steel members. The four vertical composition planes 10A, 10B, 10C, and 10D are arranged on the XZ plane in FIG. 1 and arranged on the YZ plane with the first vertical composition planes 10A and 10B having a large aspect ratio. The first vertical composition planes 10A and 10B are smaller in aspect ratio than the first vertical composition planes 10A and 10B, and the first vertical composition planes 10A and 10B are arranged in parallel. Are arranged perpendicular to the first vertical composition planes 10A, 10B.
The steel structure 10 forms a rooftop floor portion with a foundation frame 100 that forms the upper part of the foundation frame arranged on the ground B, and floor frames 110, 120,... A roof frame 210 is provided. The base frame body 100, the floor frame bodies 110 to 200, and the rooftop frame body 210 are ladders composed of four beams that form an outer frame combined with a rectangular shape, and two connecting members that connect two opposing beams. It is formed in a shape. Looking at the floor frame 110 on the second floor, as shown in FIG. 2, the floor frame 110 is composed of four beams 111 and two beams that are passed between and connected to the two beams 111 facing each other. The connecting member 112 is configured.

The steel structure 10 includes four corner pillars 310 and four through pillars 320 disposed inside each corner pillar 310. The corner posts 310 are arranged from the floor frame body 120 to the roof frame body 210 of the second floor portion of the steel structure 10. Further, the through pillar 320 is arranged to pass from the basic frame body 100 to the rooftop frame body 210.
In addition, the steel structure 10 includes a substantially Y-shaped support member 400 in each lower floor 10L of the first vertical composition surfaces 10A and 10B facing each other. The column member 400 is erected at the center position in the first vertical composition planes 10A and 10B of the base frame body 100, and extends vertically to the floor frame body 110 on the second floor and is erected on the ground B. The vertical pillar 410 and the top end of the vertical pillar 410 extend in a bifurcated manner in the first vertical composition planes 10A and 10B and are joined to both ends of the 130th floor frame body on the third floor forming the upper floor 10H. The two oblique columns 420 are formed. In this example, while the corner pillar 310 is not disposed in the lower floor 10L, the Y-shaped support member 400 is disposed, so that the horizontal rigidity is set to be smaller than that of the upper floor 10H.

Furthermore, the steel structure 10 includes two brace-type dampers 500 as damper devices in the lower floor 10L in the first vertical composition planes 10A and 10B. The lower portion of the damper 500 is connected to a standing portion of the vertical column 410 constituting the column member 400 on the ground B, and is disposed obliquely upward in the first vertical composition planes 10A and 10B. Two hydraulic rod dampers connected to both ends of the frame 120 are provided.
The damper 500 can absorb vibrations and shocks in the compression and tension directions against the deformation of the first vertical construction surfaces 10A and 10B.
The upper floor 10H of the steel structure 10 substantially includes the corner pillar 310, the floor frame body 130 and the floor frame body 170, and the corner pillar 310, the floor frame body 170 and the roof frame body 210 in the first vertical composition surfaces 10A and 10B. The diagonal column 600 which consists of the bracing member 610 connected in X shape is provided. Two sets of diagonal columns 600 are provided, that is, one set from the floor frame body 130 on the fourth floor to the floor frame body 170 on the eighth floor, and one set is provided from the floor frame body 170 on the eighth floor to the roof frame body 210.
This oblique column 600 is used for the purpose of bearing the axial force and bending by making the ends rigidly joined.

With the above configuration, in the first vertical composition surfaces 10A and 10B, the horizontal rigidity of the lower floor 10L can be made smaller than the horizontal rigidity of the upper floor, and the damper device is disposed on the lower floor. The steel structure 10 of the building is configured to be low in rigidity and easy to vibrate in the direction of arrow A in the XZ plane in FIG. 1, and this vibration is attenuated by the damper 500.
Further, in the second vertical composition planes 10C and 10D, a bracing member 330 is disposed between the two through pillars 320 from the second floor to the ninth floor as shown in FIG. A bracing member 340 is disposed between the lower end of each and the intersection of the through pillar 320 and the floor frame 110 on the second floor.
And about the 1st floor part of 2nd vertical composition surface 10C, 10D, the two bracing members 350 are arrange | positioned combining in substantially X shape, and the horizontal rigidity in the 1st floor part is ensured.
In the second vertical composition surfaces 10C and 10D, since the rigidity in the direction of arrow B in the YZ plane is high and the vibration is difficult, no damper device is disposed in the second vertical composition surfaces 10C and 10D.

The steel structure 10 according to this example is characterized by the following configuration. That is, in the building including the steel structure 10, the horizontal rigidity of the lower floor 10L is set to 0.787 which is 0.8 or less of the horizontal rigidity of the upper floor 10H. This is in conformity with the regulations of the Building Standards Law for general buildings, and the rigidity in the lower layer is set as a value that can realize the soft fast story.
In this example, the natural period T of the building including the steel structure 10 is 1.155 seconds, which is 1 second or more and 5 seconds or less. This is set so that it does not coincide with the period of the earthquake period (1 second or less) and the vibration period is not so long from the viewpoint of comfortability and the like.
Further, in this example, the equivalent attenuation h of the building is 0.04 which is 0.03 or more and 1.00 or less. In this example, the value is larger than 0.02, which is an equivalent attenuation value of a normal steel structure.
And in this example, the damper 500 was made to absorb 60% which is 30% or more of the kinetic energy of the whole building. In this way, by absorbing a large part of the kinetic energy of the entire building with the damper device, the vibration of the building is quickly damped.

As described above, since the foundation frame 100 is configured as described above, it is possible to realize horizontal rigidity that is lower in the lower floor than in the upper floor of the vertical construction surface, and the deformation and kinetic energy due to vibration are concentrated on the lower floor. This kinetic energy can be absorbed by the damper with certainty.
In addition, the building according to this example makes the appearance of the building unique by disposing a substantially Y-shaped support member on the lower floor portion and exposing a damper disposed in a substantially V-shape. be able to. Moreover, since the building which concerns on this example arrange | positioned the Y-shaped support | pillar member without arrange | positioning a corner pillar in the low-rise floor part, the structure which does not have a pillar in the corner of the low-rise floor part of a building and It is possible to adopt a free floor configuration such as arranging an entrance or an open entrance at the corner.
In the above example, the substantially Y-shaped support members and dampers are arranged only on the vertical composition plane arranged on the XY plane. However, these members may be arranged on all the vertical composition planes. Good. That is, in the above example, the example in which the concept of soft fast story is applied only to two vertical surfaces has been described, but the concept of soft fast story can be applied to four vertical surfaces.
In the above example, the number of floors of the building is eleventh floor, the first to third floors are the lower floors, and the fourth to eleventh floors are the upper floors. However, the number of floors of the building, the lower floors, and the upper floors are It can be changed as appropriate. In addition, the aspect ratio of the building can be set as appropriate.

It is a perspective view which shows the framework structure of the building which concerns on the example of embodiment. It is an expansion perspective view which shows the frame structure of the lower floor of the building shown in FIG. It is a figure which shows the framework structure of the building part shown in FIG. 1, (a) is an elevation view of a vertical composition surface, (b) is a front view of an orthogonal composition surface.

Explanation of symbols

10 Steel structure, 10A, 10B First vertical plane, 10C, 10D Second vertical plane, 10H Upper floor, 10L Lower floor, 100 Base frame, 110 ... 200 Floor frame, 111 Beam, 112 Connecting member, 210 Roof frame, 310 corner pillar, 320 through pillar, 330 bracing member, 340 bracing member, 400 strut member, 410 vertical pillar, 420 oblique pillar, 500 damper, 600 oblique pillar, 610 bracing member, B ground

Claims (8)

In a building comprising a plurality of floors, the horizontal rigidity of the lower floor is smaller than the horizontal rigidity of the upper floor, and a damper device is provided on the lower floor,
The building comprises at least one vertical construction surface arranged from at least an upper floor toward a lower floor,
The portion constituting the lower floor of the vertical construction surface is one vertical pillar standing on the ground as a structural member and extends upward from the tip of the vertical pillar in the vertical construction surface to form the upper floor. It is configured with a substantially Y-shaped support member composed of two oblique columns joined to the part,
A base portion is connected to a vertical standing portion of the vertical column, and is arranged obliquely upward in the vertical composition plane, and an upper end portion is connected to a lower end of a portion forming the upper floor and arranged in a substantially V shape. The building is further provided with two brace-type dampers.   2. The building according to claim 1, wherein the upper floor of the vertical construction surface is provided with oblique columns that connect the columns and beams constituting the vertical construction surface in a substantially X shape as structural members.   The building according to claim 1 or 2, wherein the horizontal rigidity of the lower floor is 0.8 or less of the horizontal rigidity of the upper floor.   4. The building according to claim 1, wherein the natural period T of the building is not less than 1 second and not more than 5 seconds.   The building according to any one of claims 1 to 4, wherein an equivalent attenuation constant h of the building is 0.03 or more and 1.00 or less.   The building according to any one of claims 1 to 5, wherein the damper device absorbs 30% or more of the kinetic energy of the entire building.   The corner pillar which comprises the both ends of the said vertical construction surface is arrange | positioned only in the said upper floor part, The building as described in any one of the Claims 1 thru | or 6 characterized by the above-mentioned.   The building according to any one of claims 1 to 7, further comprising two opposing vertical construction surfaces.

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