JPH021946B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a high-rise building that can suppress long-period vibrations during earthquakes, strong winds, etc.

[Conventional technology]

It has long been well known that high-rise buildings experience long-period vibrations (low-order natural vibrations) during earthquakes and strong winds. Although this long-period vibration poses no problem in terms of structural safety, in high-rise buildings where people live all the time, it may give a sense of anxiety or cause symptoms of seasickness. In particular, the effects of this cannot be ignored in residential buildings, hotels, etc., and improvements are desired as high-rise buildings become more popular. However, near the top floor of a high-rise building, a fixed point equivalent to the building's foundation cannot be obtained, so
It is extremely difficult to suppress such long-period vibrations.

Therefore, in the past, vibration damping mechanisms using the inertial force of several hundred tons of concrete have been attempted, and in reality, no measures have been taken to suppress vibrations in a mechanical manner.

[Problem that the invention seeks to solve]

An object of the present invention is to easily realize suppression of long-period vibrations in high-rise buildings, which has not been done in the past.

[Means for solving problems]

A high-rise building according to the present invention has both ends of a series of wires fixed to the upper part of the high-rise building, and the middle part of the wire is located in the lower part of the high-rise building, and columns and beams in each layer of the high-rise building are provided. A pulley is provided at each of the joint parts of the wire, and one half of the wire from one end to the middle part sequentially repeats an inclined part that slopes in substantially the same direction from the top to the bottom and a horizontal part that is substantially horizontal. The other half of the wire between the other end and the intermediate portion is sloped from above to below in the opposite direction to the slope of the one half of the wire. Bridged over each of the pulleys so as to sequentially repeat an inclined part and a substantially horizontal horizontal part,
[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

1 to 5 show a first embodiment of the invention.

In the figure, 1 is a high-rise building, and both ends 2a and 2b of a series of wires 2 are fixed to the upper floor of the building. The middle part 2c of the wire 2 is located on the lower floor of the high-rise building 1, and the middle part 2c of the wire 2 is located at the lower level of the high-rise building 1.
One half of the area up to c (the part indicated by the solid line in Figure 1) and the other half from the one end 2b to the middle part 2c (the part indicated by the dotted line in Figure 1) are:
The pulleys 3 are arranged in a zigzag pattern from above to below, spanning over a plurality of pulleys 3 each installed at a fixed position in the high-rise building 1, and are given an appropriate tension.

The fixed portions of both ends 2a and 2b of the wire 2 are fixed at one end 2
As shown in FIG. 2 representing side a, one end 2 of the wire 2 is attached to the fixture 4 fixed to the joint between the column 1a and the beam 1b on the upper floor of the high-rise building 1.
The connecting tool 5 connected to a is connected by a joint pin 6. Further, each pulley 3 is provided by attaching a pulley holder 7 to a joint between a column 1a and a beam 1b on each floor of the high-rise building 1, as shown in FIG. The wire 2 is stretched over these pulleys 3 in a continuous Z-shape as shown below. That is, one half of the wire 2, indicated by the solid line in FIG. 1, is spanned in such a manner that an inclined portion 2d that slopes downward to the left in the figure and a horizontal portion 2e that is approximately horizontal are repeated in sequence, and one half of the wire 2 is , Wire 2 shown by the dotted line in FIG.
The other half of the bridge is constructed by sequentially repeating an inclined portion 2f that slopes to the lower right in the figure and a horizontal portion 2g that is substantially horizontal. That is,
The sloped portions 2d, 2d, . . . (slanted portions 2e, 2e, . . .) are formed corresponding to each floor.

Further, the foundation of the high-rise building 1 is equipped with a damper 8 that suppresses displacement of the intermediate portion of the wire 2 in its axial direction. This damper 8 has a cylinder 8a filled with oil as shown in FIG. 5a.
It has a structure including a piston (see FIG. 5b) 8c having a large number of small holes 8b, and in this example, two dampers 8 are provided as shown in FIG. 4. That is, the cylinders 8a of the two dampers 8 are symmetrically attached to left and right anchors 9 fixed to the foundation of the high-rise building 1, and the piston rods 8a of these dampers 8
d is connected to the connecting body 10. This connected body 1
0 is guided so as to be slidable in the left and right direction on a guide rail 11 that spans between the left and right anchors 9, and the intermediate portion 2 of the wire 2 is attached to the upper part of the guide rail 11.
c are connected.

With the above configuration, for example, when the high-rise building 1 vibrates and its upper layer tilts to the right in FIG. Tension is applied to the portions 2d, 2d, . Since the sloped parts 2d, 2d, ... are formed corresponding to each story by passing through the horizontal parts 2e, 2e, ..., this tension is applied to the sloped parts 2d, 2d, ... between the respective stories. , the displacements between the respective layers of the wire 2 due to these tensions are added together and appear as a large displacement of the intermediate portion 2c of the wire 2 to the left in FIG. This displacement of the intermediate portion 2c of the wire 2 is caused by the piston rod 8d of the damper 8 on the left in FIG. 4 retracting to the left, and the piston rod 8d of the damper 8 on the right in FIG. suppressed by
That is, the damper 8 generates a flow of oil through the small hole 8b of the piston 8c by the displacement of the piston 8c, and at this time generates a resistance force proportional to the velocity amplitude of the vibration. Also, the energy at this time increases the oil temperature.

On the other hand, when high-rise building 1 leans to the left,
Tension is applied to the inclined portion 2f of the other half of the wire 2, and the displacements between the respective layers of the wire 2 due to the tension are added together, resulting in a large rightward displacement of the intermediate portion 2c of the wire 2. And this wire 2
Displacement of the intermediate portion 2c is suppressed by the damper 8. At this time, the piston rods 8d of the two dampers 8 are displaced to the right, contrary to the case described above, and absorb energy.

In this way, the displacement between each floor due to the vibration of the high-rise building 1 is added up and appears as a large displacement of the intermediate portion 2c of the wire 2, so the damper 8 effectively absorbs low-period vibration energy with particularly large velocity amplitude. to absorb. Moreover, high-rise building 1 according to the present invention
Because the series of wires 2 were constructed in such a way that they were continuously spanned from the upper level to the lower level,
The damper 8 only needs to be installed at one location on the foundation of the high-rise building 1, which not only reduces the initial cost, but also makes it easy to secure installation space and saves maintenance, inspection, and adjustment work. ,
It can be easily done without any effort.

FIG. 6 shows another example of the equipment configuration of the damper 8. In this example, the piston rod 8c of the damper 8, which is a double rod type, is connected to the intermediate portion 2c of the wire 2 on the same axis. This damper 8 consists of a cylinder 8a filled with oil, similar to the one in the above example.
The structure includes a piston 8c having a small hole therein, and the cylinder 8a is fixed to an anchor 9. In this example, since the displacement of the intermediate portion 2c of the wire 2 is directly applied to the piston rod 8d of the damper 8, no bending moment is generated. Therefore, the connection structure between the damper 8 and the wire 2 is simplified. It becomes possible.

Note that, in addition to the damper 8, if an active driving force such as electromagnetic force is used in combination to advance the phase of the damping force, a more excellent damping effect can be obtained. For example, if there is a delay in the development of damping force due to elongation of the wire 2 or play in the mechanical system, the vibration velocity at the representative point of the damping target (such as the top floor) is detected, and the direction is adjusted proportionally. By applying stress opposite to the above to the intermediate portion 2c of the wire 2 using the foundation as a reaction force point, an even better vibration damping effect can be obtained. In that case, as a specific example of advancing the phase of the damping force, there is a method of varying the oil pressure in the cylinder 8a, and a linear motor or the like can be used as the driving force.

〔Effect of the invention〕

As explained above, the high-rise building according to the present invention is constructed by extending a series of wires in a continuous Z-shape between the joints of columns and beams on each floor of the high-rise building. A configuration in which the displacement between each floor caused by the vibration of the building is added to the intermediate part of the wire that is moved, and the displacement of the intermediate part of the wire is suppressed by a damper installed at the foundation of the building. Therefore, by suppressing the displacement of the wire using a damper, long-period vibrations in high-rise buildings can be actively suppressed, and it is extremely easy to do so without adding a large inertial mass to the building as in the past. It can exhibit excellent vibration damping function. Moreover, according to the high-rise building according to the present invention, since the series of wires is continuously stretched from the upper floor to the lower floor, the damper installed only at one place in the foundation can damp the vibration of the entire building. Furthermore, since the damper only needs to be installed in one location, it is possible to not only reduce initial costs, but also to easily secure installation space, and to reduce maintenance, inspection and adjustment work. It is possible to achieve excellent effects such as being able to easily perform work without requiring much effort.

[Brief explanation of drawings]

1 to 5 show one embodiment of the present invention, FIG. 1 is a schematic diagram of the entire high-rise building, and FIG.
Figure 3 is an explanatory diagram of the wire end fixing location, Figure 3 is an explanatory diagram of the pulley attachment location, Figure 4 is an explanatory diagram of the damper installation structure, Figure 5a is a schematic sectional view of the damper, and Figure 5b is an illustration of the damper installation structure. FIG. 6, which is a plan view of the piston of the damper, is an explanatory diagram showing another example of the damper installation structure. 1...High-rise building, 1a...Column, 1b...Beam, 2...Wire, 2a...One end, 2b...Other end, 2c...Intermediate part,
2d... Slanted part of one half, 2e... Horizontal part of one half, 2f... Slanted part of other half, 2g... Horizontal part of other half, 3... Pulley, 8... Damper.

Claims (1)

[Claims] 1. Fix both ends of a series of wires to the upper floors of a high-rise building, place the middle part of the wires on the lower floors of a high-rise building, and attach them to each joint between a column and a beam on each floor of a high-rise building. A pulley is provided, and one half of the wire from one end to the middle part is formed by sequentially repeating an inclined part that slopes in substantially the same direction from above to below and a horizontal part that is substantially horizontal. The other half of the wire from the other end to the middle part has an inclined part that slopes from above to downward in the opposite direction to the inclined part of the one half of the wire, and the other half of the wire is substantially horizontal. A high-rise building, characterized in that the foundation of the high-rise building is equipped with a damper for suppressing displacement of the middle part of the wire, the horizontal part of the wire being successively repeated over each of the pulleys.