JPH0366474B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a disk damper for a seismic isolation system, such as a damping device for a seismic isolation system that is attached to the foundation of a building structure to improve the seismic isolation effect. be.

<Conventional technology> Architectural structures such as buildings (hereinafter simply referred to as structures)
Some buildings employ seismic isolation systems to protect these structures from damage caused by earthquakes, etc. As such a seismic isolation system, one in which laminated rubber is arranged between a structure and a foundation has been known. Laminated rubber is made by stacking plate-shaped rubber materials and metal plates alternately and fixing the rubber materials and metal plates by adhesive or other methods. This laminated rubber is placed on a foundation at regular intervals, and a structure is placed thereon to elastically support the structure.

This configuration lengthens the natural period of the structure,
In the case of an earthquake, the laminated rubber can shear and deform in response to the shaking of the structure and reduce the seismic force, making it possible to reduce the cost of constructing buildings with earthquake-resistant structures.

<Problems to be solved by the invention> However, with such conventional seismic isolation systems, the displacement of the laminated rubber tends to increase during earthquakes, etc., and the shaking of the structure does not stop easily. Ta. Furthermore, depending on the scale of the earthquake, the amplitude of the shaking of the structure may exceed the permissible displacement amount of the laminated rubber, resulting in the failure of the laminated rubber.

The present invention was made in view of these conventional problems, and its purpose is to lengthen the natural period of a building structure to reduce seismic force, while at the same time reducing the shaking of the structure caused by an earthquake. An object of the present invention is to provide a damping device for a seismic isolation system using a disk damper that damps the vibration.

<Means for Solving the Problems> The present invention has been made in view of the above object, and the gist thereof is to press the first disk of the arm structure and the first disk with the intervention of a friction material. A second disk having an arm structure capable of rotationally movable relative to the first disk and a disk damper connected at the proximal end portions of both disks are arranged in four stages, and the distal end movable portion of each disk is sequentially pivoted. At the same time, one set of the mutually opposing movable tip connecting points is connected by a rod, and the approximately midpoint of this rod is connected to one of the foundations or structures, and the movable tip A damping device for a seismic isolation system is characterized in that the other set of partial connection points is connected to the other of the foundation or structure.

<Function> In the damping device for a seismic isolation system according to the present invention, the seismic force is applied to the damping device through the connection points with the foundation and the structure due to the displacement movement between the structure and the foundation due to the deformation of the laminated rubber. acts. The damping device has a link structure in which movable parts of four disc dampers each having a pair of rotating arms are sequentially connected, so even if seismic force acts in any direction in the horizontal plane,
In at least one of the disc dampers of the present invention, relative rotational motion occurs between the first disc and the second disc. This rotational motion is subjected to large frictional resistance by the friction material, which absorbs the earthquake energy and rapidly attenuates the shaking of the structure.

<Embodiment> FIGS. 1 to 3 are diagrams showing an embodiment of a disk damper. The disk damper 5 according to this embodiment is of a type that attenuates shaking by converting relative displacement between the structure and the foundation into rotational motion.
As shown in the figure, it is attached to a seismic isolation system in which a laminated rubber 4 is placed on a foundation 1, and a structure 2 is further installed on this laminated rubber 4.

As shown in FIGS. 2 and 3, this disk damper 5 includes a first disk 6 having an arm structure in which the distal end portion is formed into a pointed shape and the base end portion is formed into a disk shape. , a second disk 8 which has substantially the same arm structure as this first disk 6 and is rotatably coupled to the first disk 6 at its base end portion, and these first disks 6.
and a friction material 7 interposed between the second disk 8
It consists of In this embodiment, the friction material 7 is
As shown in FIG. 3, it consists of a disk-shaped body made of sintered metal or other material and is fixedly attached to both the front and back surfaces of the first disk 6, and the upper friction material 7 is pressed from above. While the plate 9 is applied, a second disk 8 is applied from below to the friction material 7 on the lower side. A through hole is formed in the first and second disks 6, 8, the friction material 7, and the presser plate 9 at approximately the center, and the bolt 10 is inserted into this through hole and is inserted from the tip side of the bolt 10. The spring 11 is loaded and the nut 12 is screwed together, thereby connecting the first disk 6 and the second disk.
and a disk 8 are connected to each other so as to be relatively rotatable, and both members are pressed into contact with each other with a friction material 7 interposed. Further, a first connecting rod 14 is attached to the tip of the first disk 6 with a bearing 13 interposed therebetween, while a second connecting rod 14 is attached to the tip of the second disk 8 with a bearing 15 interposed. rod 16
is attached to form the tip movable part connection point.
When incorporating this disk damper 5 into a seismic isolation system, for example, the first connecting rod 14
is connected to the foundation beam 3 of the structure 2, and the second connecting rod 16 is connected to the foundation.

In a seismic isolation system equipped with a rotary disc damper 5 having such a configuration, when an earthquake force is applied to the structure 2, the structure 2 moves back and forth or left and right in a plane with a natural period lengthened by the laminated rubber 4. sway in the direction. When this swing direction coincides with the direction of relative rotational movement between the first and second disks 6 and 8 of the disk damper 5 (indicated by arrow S in FIG. 2), the first and second connecting rods 14 and 16 The seismic force transmitted to the disk damper through the
And the second disks 6, 8 act to rotate relative to each other in the direction of the arrow S about the connection point of the bolt 10, thereby rotating both disks 6, 8. When this rotational movement begins, a frictional force is generated between the disks 6, 8 and the friction material 7, absorbing energy, and exerting a large resistance force against the rotational movement. This weakens the seismic force and significantly dampens the shaking of the structure.

In this disc damper 5, the pressure contact force between the first and second discs 6 and 8 can be adjusted by adjusting the tightening amount of the nut 12 as appropriate, and the frictional force when the disc damper 5 is operated can be adjusted. I can do it.

FIG. 4 is a diagram showing an embodiment of a damping device for a seismic isolation system according to the present invention, which is constructed using the disk damper 5. The damping device according to this embodiment includes a ring mechanism in which the disk damper 5 has four stages (distinguished as 5a, 5b, 5c, and 5d for convenience of explanation below), and the movable end portions of each disk are connected in sequence. be done. That is, the disk damper 5
The first disk 6 of a is pivotally connected to the second disk 8 of the disk damper 5b by a pin 17a,
The first disk 6 of the disk damper 5b is pivotally connected to the second disk 8 of the disk damper 5c by a pin 17b, and the first disk 6 of the disk damper 5c is pivotally connected to the second disk 8 of the disk damper 5c.
The first disk 6 of the disk damper 5d is pivotally connected to the second disk 8 of the disk damper 5d by a pin 17c, and the first disk 6 of the disk damper 5d is pivotally connected to the second disk of the disk damper 5a by a pin 17b. be done. The disks can freely rotate relative to each other at the tip movable portion connection points (hereinafter simply referred to as connection points) formed by the respective pins 17a to 17b. Among these pin connection points, pin 17a
A rod 18 is constructed and connected between the two and a pair of connecting points formed by pins 17c located opposite to each other, and a connecting shaft 19 is fixedly attached to the approximately midpoint portion of the rod 18. Also pin 1
A connecting shaft is provided at the other set of connection points between 7b and pin 17d. The connecting shaft 19 provided on the rod 18 is connected to the foundation beam 3 of the structure 2, while the connecting shafts provided on the pins 17b and 17d are connected to the foundation.

In the damping device having such a configuration, in the initial state, as shown in FIG. 4a, none of the disk dampers is pivoted, and is set to have a parallelogram ring structure. When a force is applied to this damping device in the x-axis direction (arrow P in the figure) as shown in Fig. 4b, this force is divided into the longitudinal direction and the direction perpendicular to this with respect to the rod 18. The disk dampers 5a to 5b operate as shown in FIG. Further, when an external force acts on the damping device in the y-axis direction (indicated by Q in FIG. 4), the disc damper becomes in an operating state as shown in FIG. 4c. Furthermore, the damping device has a rod direction (fourth
When an external force (indicated by R in the figure) is applied, each disk damper 5a to 5d enters the operating state as shown in FIG. 4d.

Since the damping device has a link structure as described above, even if the structure 2 shakes in any direction in the horizontal plane with respect to the foundation 1 when an earthquake occurs, a component of the seismic force is input to the damping device. And disk damper 5a~
The first disk 6 and the second disk 8 in at least one of the disk dampers 5d
A relative rotational movement occurs between the two, and a frictional force is generated along with this, absorbing energy and exerting a large resistance against the rotational movement. Especially structure 2
If relative rotational movement occurs between the first and second disks 6 and 8 in two or more disk dampers at the same time due to the way the disks oscillate, the friction force generated along with this causes the disk damper in the first stage to operate. This is twice, three or four times as strong as in the case where it is not used, and the resistance to shaking becomes extremely large. As a result, the seismic force is significantly weakened, and the shaking of the structure 2 is significantly attenuated.

<Effects of the Invention> As explained above, according to the present invention, a link structure is achieved by combining four disk dampers in which a first disk and a second disk are connected at the base end portions of both disks. This makes it possible to realize a damping device that can attenuate shaking in any direction in the horizontal plane, in any direction, forward, backward, left, or right, and also significantly increase the resistance to the shaking, thereby attenuating the shaking of the structure. Various effects can be obtained, such as being able to significantly improve efficiency.

[Brief explanation of drawings]

Figure 1 is a side view schematically showing a seismic isolation system equipped with a disc damper, Figure 2 is a plan view of the disc damper, and Figure 3 is a side view of the disc damper shown in Figure 2. Figure 4 shows the configuration and operation mode of the damping device for seismic isolation systems, where a is the initial state, b is the displacement in the x direction, c is the displacement in the y direction, d is the x,
FIG. 3 is a plan view showing a displacement mode in the y direction. 1...Foundation, 2...Structure, 3...Foundation beam, 4
... Laminated rubber, 5 ... Disk damper, 6 ... First disk, 7 ... Friction material, 8 ... Second disk, 9 ... Holding plate, 10 ... Bolt, 12 ...
Nut, 13, 15...Bearing, 14...First connection rod, 16...Second connection rod, 1
7a-17b...pin, 18...rod, 19...
...Connection shaft.

Claims (1)

[Claims] 1. A first disk having an arm structure, and a second disk having an arm structure that is pressed into contact with the first disk with the intervention of a friction material and is rotatable relative to the first disk. Four disk dampers are connected at the proximal end portions of both disks, and the movable end portions of each disk are sequentially connected in a pivotal manner, and one set of the connecting points of the movable end portions facing each other is connected by a rod. At the same time, the approximately midpoint of this rod is connected to one of the foundation or the structure, and the other set of the end movable part connection points is connected to the other of the foundation or the structure. Damping device for the system.