JP7415543B2 - Clearance adjustment mechanism - Google Patents

Description

The present invention relates to a clearance adjustment mechanism used in a connected seismic damping structure in which buildings with different natural periods are connected by a seismic damping device.

Traditionally, as a type of damping structure system that absorbs seismic energy input into a building using damping members, it connects two buildings with different natural periods with a damping device to reduce the response of both during an earthquake. , a connected seismic damping structure is generally known.

For example, in Patent Document 1, a vibration damping structure is established between a cylindrical external building in which a vertically extending void space is provided and an internal building that is constructed within the void space and is more rigid than the external building. equipment is provided.

Japanese Patent Application Publication No. 2009-19479

A connected seismic damping structure utilizes the difference in movement of each connected building to operate a seismic damping device and absorb vibration energy. Therefore, when designing and constructing two buildings, it is important to ensure that, under normal conditions, there is a clearance between the two connected buildings that is at least the sum of the horizontal displacements that may occur in each building. There is.

However, it is known that the shape of a building after construction changes, albeit minutely, over time. For example, in concrete buildings, the so-called creep phenomenon, in which strain increases over time, occurs unevenly. do. For this reason, when deformation occurs in an internal building constructed in the void space of an external building, as in Patent Document 1, there may be areas where the clearance between the external building is decreased or increased compared to the design. Unequal clearance may occur, such as mixing.

Then, in areas where the clearance is reduced, when both buildings shake due to an earthquake or the like, the internal building and the external building may collide and cause damage. On the other hand, at locations where the clearance has increased, the damping device may have already expanded by this increased amount. In such a case, the vibration damping device is not able to secure the stroke length specified in the design plan, so it is likely that the vibration damping device will not be able to exhibit the planned vibration damping performance when an earthquake occurs.

The present invention has been made in view of such problems, and its main purpose is to provide a clearance adjustment mechanism that can adjust the clearance between buildings to which a connected seismic damping structure is applied to an appropriate amount. That's true.

In order to achieve such an object, the clearance adjustment mechanism of the present invention is designed to prevent an imbalance between a first building and a second building connected by a vibration damping device due to the existence of a place where the clearance is larger than the appropriate amount. This is a clearance adjustment mechanism that adjusts the clearance by applying a horizontal force in the tensile direction to change the posture of either side when the building is closed, and one end is provided in the first building and a weight is attached to the other end. and a direction changing sheave provided in the second building and around which the cable material is wrapped.

According to the clearance adjustment mechanism of the present invention, since the tensile force applied to the cable material by the weight of the weight can be applied as a horizontal force to the first building and the second building, the first building and the second building or By deforming the posture of either one of them by this horizontal force, it becomes possible to adjust the clearance between them to an appropriate amount.

In addition, since a lateral part and a lower part are formed on the cable material through the direction change sheave, and a weight is attached to this lower part, earthquakes etc. may occur during service after the clearance adjustment mechanism is installed. Even if a horizontal displacement occurs in the first and second buildings, the length of the lateral part changes and the weight only moves up and down, and the tensile force applied to the rope due to the weight's own weight is Can hold almost a constant amount. Therefore, since the horizontal force acting on the first building and the second building does not substantially change, the posture deformed by this horizontal force can be maintained in the same way as in normal times even during an earthquake.

Further, the horizontal force acting on the first building and the second building can be easily adjusted by increasing or decreasing the weight and changing the tensile force applied to the cable material. Therefore, the posture of the first building and/or the second building can be deformed by a desired amount of deformation without much effort, and the clearance between them can be adjusted to an appropriate amount with high precision. It becomes possible.

In addition, since the structure is simple, not only can the installation work be easily performed, but also the rigidity and natural period of the first and second buildings themselves can be changed, and the operation of the vibration damping device can be changed. Therefore, the vibration control performance that was planned during the design planning of the connected vibration damping structure will not be impaired.

The clearance adjustment mechanism of the present invention is characterized in that the weight is provided with a rail that guides the movement direction.

According to the clearance adjustment mechanism of the present invention, since the movement direction of the weight hanging from the lower part of the cable member is regulated by the rail, the first building and the second building can be damaged in the event of an earthquake, etc. This makes it possible to prevent such behavior.

According to the present invention, since the tensile force applied to the cable material by the weight of the weight is applied to the first building and the second building as a horizontal force, the posture of the first building and/or the second building is changed to By deforming it with this horizontal force, it becomes possible to adjust the clearance between them to an appropriate amount.

It is a figure showing a 1st embodiment of a clearance adjustment mechanism in an embodiment of the present invention. FIG. 6 is a diagram showing details of a rail and weight drop prevention means in an embodiment of the present invention. It is a figure which shows the other example of the fall prevention means of a rail and weight in embodiment of this invention. It is a figure which shows the 2nd embodiment of the clearance adjustment mechanism in embodiment of this invention. It is a figure which shows the 3rd embodiment of the clearance adjustment mechanism in embodiment of this invention. It is a figure which shows the other example in 3rd Embodiment of the clearance adjustment mechanism in embodiment of this invention. It is a figure which shows the other example of 4th Embodiment of the clearance adjustment mechanism in embodiment of this invention. It is a figure which shows the hanging state of the cable-like material of 4th Embodiment of the clearance adjustment mechanism in embodiment of this invention. It is a figure which shows the other example of the clearance adjustment mechanism in embodiment of this invention.

The clearance adjustment mechanism of the present invention corrects the posture of a building to which a connected vibration damping structure is applied without changing the stiffness or natural period of the building or affecting the operation of the vibration damping device, and connects the building with the vibration damping device. This is a device to adjust the clearance between buildings. The details of the clearance adjustment mechanism will be explained below with reference to FIGS. 1 to 9.

As shown in FIGS. 1A and 1B, the external building 11 and the internal building 12 are connected by a plurality of vibration damping devices 13 to form a connected vibration damping structure. The external building 11 is a steel-framed cylindrical building having a void space 111 inside, and the internal building 12 is a reinforced concrete building built in the void space 111 and having a different natural period from that of the external building 11.

Further, the plurality of damping devices 13 connecting these may be any oil damper, friction damper, viscous damper, viscoelastic damper, hysteretic damper, etc., and the same type of damper is used for all of the plurality of damping devices 13. or different dampers may be used in appropriate combination.

Between the internal building 12 and the external building 11 that form such a connected seismic damping structure, an appropriate amount of clearance L1 is evenly secured during normal times. The appropriate amount L1 is at least the sum of the horizontal displacement δ1 of the external building 11 and the horizontal displacement δ2 of the internal building 12, which are expected to occur during an earthquake.

However, due to aging or unforeseen events, for example, the internal building 12 in FIG. , there is an uneven clearance. Therefore, as shown in FIG. 1(b), the clearance adjustment mechanism 1 is placed in a position where it can apply a horizontal force in the tensile direction to the external building 11 and the internal building 12 to correct the posture of the internal building 12. The clearance between the building and the external building 11 has been corrected so that it is uniform over the entire area.

<<First embodiment>>
As shown in FIG. 1(b), a clearance adjustment mechanism 1 disposed between an external building 11 and an internal building 12 has a cable member 2, a direction changing sheave 3, a weight 4, and a rail 5. , is equipped with.

The cord-like material 2 may be either a string-like member or a band-like member, and in this embodiment, a wire is used. Further, one end 2s of the cable member 2 is provided on the external building 11, and a weight 4 is attached to the other end 2e, and a direction changing sheave 3 is hung at an intermediate position.

The direction changing sheave 3 is a sheave for changing the extending direction of the cable material 2 from the lateral direction to the downward direction, and is provided in the internal building 12. A lateral part 21 extending laterally is formed on one end 2s side of the cable member 2 with the direction change sheave 3 in between, and a lower part 22 extending downward is formed on the other end 2e side. be done.

The weight 4 is disposed in a hanging state by being attached to the other end 2e of the cable member 2 that is continuous with the lower part 22, and applies a tensile force to the cable member 2. Any structure may be adopted as long as it can apply a tensile force to the cable member 2 by its own weight and the weight can be freely adjusted.

The clearance adjustment mechanism 1 having such a configuration causes the tensile force applied to the cable member 2 by the weight of the weight 4 to act on the external building 11 and the internal building 12 as a horizontal force, and changes the posture of the internal building 12 by this horizontal force. Transform. In other words, the internal building 12 is pulled toward the external building 11 side and its posture is corrected, and an appropriate amount L1 of clearance between the internal building 12 and the external building 11 can be secured over the entire area.

Further, the horizontal force acting on the external building 11 and the internal building 12 can be easily adjusted by increasing or decreasing the weight of the weight 4 and changing the tensile force applied to the cable member 2, so it does not require much effort. Therefore, the internal building 12 can be deformed by a desired amount of deformation, and the clearance between the external building 11 and the internal building 12 can be adjusted to the appropriate amount L1 with high accuracy.

Furthermore, since the clearance adjustment mechanism 1 has a simple structure, it is not only easy to install, but also allows the rigidity and natural period of the external building 11 and internal building 12 to be changed or controlled. Since the operation of the vibration device 13 is not affected, the vibration damping performance that was planned in the design planning of the connected vibration damping structure is not impaired.

Further, when the clearance adjustment mechanism 1 is put into service after installation, if an earthquake or the like occurs and horizontal displacement occurs in the external building 11 and the internal building 12, the length of the lateral portion 21 changes accordingly, and By simply moving the weight 4 up and down, the tensile force applied to the cable member 2 due to its own weight can be maintained at a substantially constant amount.

Therefore, since the horizontal force acting on the external building 11 and the internal building 12 hardly changes, it is possible to maintain the posture of the internal building 12, which has been deformed by the horizontal force, in the same way as in normal times even during an earthquake. Become.

In this way, the weight 4 that moves in the height direction is in a hanging state via the lower part 22 of the cable member 2, so a rail 5 is provided to control the direction of movement of the weight 4, and the inside of this rail 5 is It's being moved. In this embodiment, the rail 5 is provided on the wall surface of the internal building 12, but the rail 5 is not limited to this, and may be provided independently from the external building 11 and the internal building 12.

The rail 5 may have any structure as long as it allows the weight 4 to move downward (including vertically and diagonally downward) while suppressing movement in other directions. Providing such a rail 5 prevents the weight 4 from behaving like a pendulum or moving in a direction that would cause it to collide with the external building 11 and internal building 12 under the influence of earthquakes, wind and rain, etc. can do.

Specifically, as shown in FIG. 2(a), for example, the rail 5 is constituted by a long member whose cross section resembles lip channel steel, and the rail 5 is made of an elongated member whose longitudinal direction is directed downward, and is attached to the internal building 12. It is installed below the direction changing sheave 3 on the side of the At this time, the weight 4 is formed into a rectangular parallelepiped shape that is in contact with the entire inner surface of the rail 5.

Further, it is preferable to install a cushioning material 51 using an elastic member such as a spring material in the rail 5 as a means for preventing the weight 4 from falling. In this way, when an unexpected situation occurs such as a break in the cable member 2 causing the weight 4 to fall, the shock absorbing material 51 can absorb the impact while receiving the weight 4.

Note that the means for preventing the weight 4 from falling is not limited to the cushioning material 51; for example, a rough surface that increases frictional resistance may be formed on the lower inner surface of the rail 5, or as shown in FIG. 2(b). , a tapered portion 52 may be provided such that the internal space becomes narrower as it progresses downward with respect to the rail 5. In this case, it is preferable that the lower side surface of the weight 4 also be provided with an inclined surface that comes into contact with the tapered portion 52.

Furthermore, a weight locking device 6 as shown in FIG. 3 may be provided. The weight locking device 6 includes a wedge 61 and a vertical rod 62 that protrude from the lower end surface of the weight 4, and an elastic member 63 attached to the vertical rod 62. In addition, it includes a locking plate 64 supported by the elastic member 63 and a pair of locking rods 65 provided on the upper surface of the locking plate 64 and extending laterally.

In the weight locking device 6 having such a configuration, a pair of locking rods 65 are equipped with an urging member, and as shown in FIG. It is on the plate 64 with the other end facing the side of the rail 5 and one end pressed against the wedge 61.

When the weight 4 descends due to cutting of the rope 2, etc., the wedge 61 pushes each of the pair of locking rods 65 toward the side of the rail 5, as shown in FIG. 3(b). , is inserted into the insertion hole of the locking plate 64. Then, the weight locking device 6 lowers together with the weight 4 while bringing the other end of the locking rod 65 into contact with the side of the rail 5, but reaches the height position where the through hole 53 is provided on the side of the rail 5. When the weight 4 has descended to this point, the other end of the locking rod 65 fits into the through hole 53, thereby preventing the weight 4 from falling.

<<Second embodiment>>
An example in which a vertical sheave 7 is additionally provided to the clearance adjustment mechanism 1 described above will be described below as a second embodiment.

As shown in FIG. 4(a), the vertical sheave 7 is provided on the external building 11, around which the lower part 22 of the cable material 2 is wrapped. This makes it possible to apply twice as much horizontal force to the external building 11 and the internal building 12 as in the case where the vertical sheave 7 is not provided.

In addition, as shown in FIG. 4(b), a plurality of vertical sheaves 7 may be provided, and in this case, the lower part 22 of the cable material 2 is alternately laid around the external building 11 and the internal building 12. It should be arranged so that it can be done. If the lowermost vertical sheave 7 is located on the external building 11, the weight 4 will also be located on the external building 11 side, so the rail 5 will also be installed on the external building 11 side. On the other hand, if the lowest vertical sheave 7 is located on the internal building 12, the rail 5 is also installed on the internal building 12 side.

In this embodiment, the vertical sheaves 7 are arranged in a downward staggered manner between the external building 11 and the internal building 12, but they may be arranged in a staggered manner laterally.

<<Third embodiment>>
In the second embodiment described above, an example was shown in which the vertical sheave 7 is added to the clearance adjustment mechanism 1. An example in which a pair of horizontal sheaves 81 and 82 are additionally provided to the clearance adjustment mechanism 1, which allows the clearance adjustment mechanism 1 to follow the building 12 more smoothly, will be described below as a third embodiment.

As shown in FIG. 5(a), the pair of horizontal sheaves 81 and 82 are the ones over which the horizontal portion 21 of the cable material 2 is wrapped, and each of the external building 11 and the internal building 12 has a height. They are placed in the same position. As shown in the plan view of FIG. 5(b), the lateral part 21 of the cable member 2, whose one end 2s is provided in the internal building 12, is first hung over the horizontal sheave 82 provided in the internal building 12. It is passed around.

Next, it is passed around a horizontal sheave 81 provided in the external building 11 and then passed around a direction changing sheave 3 provided in the internal building 12. Then, as shown in FIG. 5(a), a lower part 22 is formed on the other end 2e side of the cable member 2 with the direction changing sheave 3 interposed therebetween, and the weight 4 is attached to the lower part 22. Since the direction change sheave 3 is provided in the internal building 12, the rails 5 on which the weights 4 move are also arranged in the internal building 12.

Further, the pair of horizontal sheaves 81 and 82 is not limited to one set, but multiple sets may be provided. In this case, as shown in FIG. It is preferable that the horizontal sheaves 82 to be fixed are arranged coaxially with each other.

When the lateral part 21 of the cable material 2 is laid around, the horizontal sheaves 81 and 82 which form a pair arranged at the uppermost end are successively laid downward, and the lowermost end provided on the external building 11 is laid down. After passing through the horizontal sheave 81, it may be passed around the direction change sheave 3.

Note that the pair of horizontal sheaves 81 and 82 may be installed directly on the external building 11 or the internal building 12, but in this embodiment, they are fixed when the vibration control device 13 is installed on the external building 11 or the internal building 12. Tool 14 is used.

Specifically, shaft pins 141 and 142 used to provide the vibration damping device 13 with respect to the external building 11 or the internal building 12 so as to be rotatable in the lateral direction are utilized. In this way, it becomes possible to easily install the pair of horizontal sheaves 81 and 82 while preserving the external building 11 or the internal building 12 as it is.

≪Fourth embodiment≫
Next, an example in which the clearance adjustment mechanism 1 is provided with three sets of paired horizontal sheaves 81 and 82 on the upper and lower sides of the vibration damping device 13 will be described below as a fourth embodiment. .

As shown in FIG. 7, the clearance adjustment mechanism 1 is provided with three pairs of horizontal sheaves 81 and 82 and a guide sheave 9 at the upper part of the vibration damping device 13, and three pairs of guide sheaves 9 at the bottom of the vibration damping device 13. A pair of transverse sheaves 81 and 82 and a direction changing sheave 3 are provided. Note that the guide sheave 9 is a sheave that rotates downward, and is installed in the internal building 12.

The horizontal sheaves 81 and 82, which form a total of six pairs provided at the upper and lower parts of the vibration damping device 13, are all used for fixing the vibration damping device 13 to the external building 11 or the internal building 12. It is provided using the shaft pins 141 and 142 of the tool 14.

In this way, when a plurality of pairs of horizontal sheaves 81 and 82 are stacked and installed, and they are installed separately above and below the vibration damping device 13, the upper or lower side of the vibration damping device 13 as shown in FIG. The distance between the fixing tool 14 and the horizontal sheaves 81 and 82 disposed at the uppermost and lowermost stages can be shortened compared to the case where the horizontal sheaves 81 and 82 are disposed at the uppermost stage and the lowermost stage. Then, even when a tensile force is applied to the cable member 2 and a horizontal force is applied via the horizontal sheaves 81 and 82 arranged at the uppermost and lowermost stages, the bending stress on the shaft pins 141 and 142 is suppressed to a small level. It is structurally advantageous.

In the clearance adjustment mechanism 1 having such a configuration, as shown in FIG. After that, it is passed around a horizontal sheave 82 provided in the external building 11, and then passed around a horizontal sheave 81 provided in the external building 11. Next, after being passed around the horizontal sheave 82 and the horizontal sheave 81 located below, it is passed around the third pair of horizontal sheaves 81, as shown in FIG. 8(b). Up to this point, the cord 2 has been wound clockwise.

Thereafter, the cable material 2 is wrapped around a guide sheave 9 provided in the internal building 12 and folded back. As a result, as shown in FIG. 8(c), the cable material 2 is moved in the order of the horizontal sheave 81 and the horizontal sheave 82 with respect to the uppermost horizontal sheaves 81 and 82 provided below the vibration control device 13. After being passed around counterclockwise, it is passed around the horizontal sheave 81 again, and the direction of passing is reversed.

After being returned clockwise in this way, after running around to the second and third pair of horizontal sheaves 81 and 82, as shown in FIG. 8(d), It is routed from the sheave 81 to the direction changing sheave 3 provided in the internal building 12. As a result, as shown in FIG. 7, a lower part 22 is formed on the other end 2e side of the cable member 2 with the direction changing sheave 3 interposed therebetween, and the weight 4 is attached to the lower part 22.

By employing such a pair of horizontal sheaves 81 and 82, the number of rope members 2 to be applied can be secured to be twice as many as the number of pairs of horizontal sheaves 81 and 82. Therefore, as shown in Figure 5, one set is twice the weight weight, two sets as shown in Figure 6 is four times the weight weight, and six sets as shown in Figure 7 are four times the weight weight. It becomes possible to apply a large horizontal force of 12 times to the external building 11 and internal building 12.

In addition, if a pair of horizontal sheaves 81 and 82 are adopted, when the clearance adjustment mechanism 1 is installed and then put into service, when an earthquake or the like occurs and horizontal displacement occurs in the external building 11 and internal building 12, the cable-like 2 can be made to follow the length of the lateral part 21 more smoothly, and the horizontal force acting on the external building 11 and the internal building 12 can be held constant more stably.

However, if the number of rope members 2 is increased by increasing the number of paired horizontal sheaves 81 and 82, when horizontal displacement occurs between the external building 11 and the internal building 12, the weight 4 This results in a vertical movement equal to the length of the rope material 2 multiplied by the distance between the horizontal sheaves 81 and 82 forming the horizontal sheaves 81 and 82 .

Also, since the upper limit of the acceleration of the weight 4 is 9.8 m/s ² , the relative acceleration between the external building 11 and the internal building 12 is 9.8 m/s ² divided by the number of cable members 2. If it exceeds this, the vertical movement of the weight 4 will not be able to follow. Therefore, when adjusting the weight of the weight 4 by employing a pair of horizontal sheaves 81 and 82, it is advisable to take into account these conditions and the friction generated between the members when designing.

In this embodiment, the horizontal sheaves 81 and 82 are installed using the shaft pins 141 and 142 provided on the fixture 14 of the vibration damping device 13, but all the members used in the clearance adjustment mechanism 1 are installed externally. It is possible to install the equipment and members provided in the building 11 and the internal building 12 as appropriate.

As described above, the clearance adjustment mechanism 1 of the present invention is simplified by forming at least the lateral part 21 and the lower part 22 in the cable member 2 via the direction changing sheave 3, and providing the weight 4 in the lower part 22. With this configuration, the tensile force applied to the rope member 2 by the weight of the weight 4 is applied as a horizontal force to the external building 11 and the internal building 12, and the posture of the external building 11 and/or the internal building 12 is changed in this manner. By deforming it by horizontal force, it becomes possible to adjust the clearance between them to an appropriate amount L1.

Note that the clearance adjustment mechanism 1 of the present invention is not limited to the above-described embodiment, and various changes can be made without departing from the spirit of the present invention.

For example, in the present embodiment, the clearance adjustment mechanism 1 is provided between the cylindrical external building 11 having the void space 111 inside and the internal building 12 constructed in the void space 111, but this is not necessarily the case. The structure is not limited to this, and as shown in FIG. 9(a), it may be provided between the adjacent first building 15 and second building 16 as long as it is a building to which a connected seismic damping structure is applied.

Further, in this embodiment, only one set of clearance adjustment mechanism 1 is provided between the external building 11 and the internal building 12, but this is not necessarily limited to this, and as shown in the plan view of FIG. 9(b). As shown, two or more sets of clearance adjustment mechanisms 1 may be provided.

1 Clearance adjustment mechanism 2 Cable material 21 Lateral part 22 Lower part 2s One end 2e Other end 3 Direction change sheave 4 Weight 5 Rail 51 Cushioning material 52 Tapered part 53 Through hole 6 Weight locking device 61 Wedge 62 Vertical rod 63 Elasticity Member 64 Locking plate 65 Locking rod 7 Vertical sheave 81 Horizontal sheave 82 Horizontal sheave 9 Guide sheave

11 External building (first building)
111 Void space 12 Internal building (second building)
13 Vibration control device 14 Fixture 141 Axial pin 142 Axial pin 15 First building 16 Second building

X Narrow space (clearance)
Y Vast separation section (clearance)
L1 appropriate amount

Claims (2)

If there is an imbalance between the first and second buildings connected by a seismic control device, where the clearance is larger than the appropriate amount, a horizontal force in the tensile direction can be applied to A clearance adjustment mechanism that adjusts the clearance by changing the posture of one of the two ,
a cord-shaped member having one end provided in the first building and having a weight attached to the other end;
a direction changing sheave that is provided in the second building and around which the cable material is routed;
A clearance adjustment mechanism characterized by comprising: The clearance adjustment mechanism according to claim 1,
A clearance adjustment mechanism characterized in that the weight is provided with a rail that guides the movement direction.

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