JPS5899538A - Earthquake vibration isolator - Google Patents

Abstract

PURPOSE:To facilitate the adjustment of the vertical loading ability and horizontal spring rigidity of an isolator by arranging between the upper and lower structures of a structural body the isolator formed by alternately laminating and fixing a plural number of metal materials equipped with through-holes and a plural number of elastic materials perpendicularly to each other. CONSTITUTION:An isolator so arranged as to support an architectural structure 4 between said structure 4 as an upper structure and a foundation 5 as a lower structure is constructed by a plural number of metal plates 6 obtained by punching through-holes 7 at positions circumferentially equally distributed, e.g., at four positions and plural number of elastic plates 3 such as rubber. Namely, it is constituted by alternately laminating said metal plates 6 and elastic plates 3 such that the through-holes 7 of said vertically arranged metal plates 6 are set in the same position and mutually bonding them. Using such isolator 8, it is possible to obtain various characteristics matching with the scale of the architectural structure 4 by changing the size and number of the holes 7 of the each metal plate 6.

Description

[Detailed Description of the Invention] The present invention relates to an isolator that reduces the propagation energy that enters the pupil proboscis from the strata, and more specifically to an isolator formed by fixing an elastic plate and an elastic plate to an alternating pressure +Jf layer. In particular, the present invention provides a structure whose hunting properties are easily adaptable to various structures.

In addition to methods for increasing the strength of the structure itself, there are seismic design methods for buildings called seismic isolation methods that attempt to absorb all of the earthquake energy transmitted from the ground to the structure.

One type of groove in this machine is a type that reduces seismic input by extending the period of the building system. This takes advantage of the general tendency that the response value characteristic of the Calo velocity l<L to which a building is subjected to earthquake motion decreases as the period of the system increases. An isolator (separation member) +11 as shown in FIG. 7(a) (1)) is an example of a device that fully realizes this effect through local treatment at the base. This is metal plate +21 +
21.-〇 and a thin elastic plate 131 of natural rubber or neoprene rubber.
Viewing the valley eFI: il fixed 1-te form 5: with a hollowed out,
'#J2 As shown in figure J2, the structure (4) and base 15) are made to bloom so as to support the structure +41. This isolator (1) has a thin rubber inserted between the steel plates, so the force of 4T causes deformation in the part of the rubber used. Since the rubber is thin, it has a large vertical spring stiffness and a small horizontal spring stiffness due to shear deformation of the rubber. In other words, it has a large vertical loading capacity and an elastic spring action in the horizontal direction. If this isolator 111 is used, the circumference M of the entire structure system
Therefore, when an earthquake occurs, the input energy of the earthquake transmitted to the superstructure is reduced, and at the same time, the superstructure is moved almost like a fan, reducing the input energy of the earthquake. It can absorb gold.

As an example of the effect of reducing the earthquake input acceleration when this isolator 111 is used, one hard isolator is placed under the pillars of a two-story building model, and the velocity of the seismic wave is reduced. Using the waveform as human power, we will explain a sample of the shaking table of the Benritsu system jL11, an example of the shaking system, and an example of the formula.

Figure 3 is an example of this, using an isolator +11, giving an input speed θ of 7G, and measuring the acceleration (length) of the floor level of each floor under the same conditions without an isolake. Shown in comparison with direct (b). In other words, if there is no isolator (the 7th floor "'C" 0. / G
However, as you get to the upper layer, the force becomes sharper, reaching 0.2G for one male. On the other hand, in 3489) with an isolator, the input acceleration term addition U
The building is small, and even on the second floor there is 0. /lck&degree, and the input acceleration is approximately equal in each layer. In other words, the superstructure is ha(・
It is stored as f1 rigid body. In this way, by using the isolator fi+, it is possible to determine the salt force with almost the same seismic intensity in the height direction, making it easier to install the 11 seismic suppression 4t inside the damaged object.

By the way, when this isolator is used for a total of 4'4, it is necessary to use an isolator with different vertical spring stiffness and horizontal spring stiffness characteristics depending on the structure. According to the architecture, /I, etc.
It was necessary to manufacture a separate isolator with its size and rubber properties carefully considered. For this reason, the investment test
It became necessary to carry out the production process from creation to characteristic testing for each building, and it took a long time from the isolator going crazy to obtaining it. Additionally, once installed, the isolator has the disadvantage that its characteristics cannot be adjusted.

Therefore, the present invention takes into consideration the above-mentioned drawbacks and improves them by making it possible to make the isolator of one type simple and of both types, so that only one type of isolator can meet multiple demands. The friend 0, that is, the end plate with a predetermined number of through holes: +-+ constitutes an isolator, fc+. These through holes are, for example, four holes (7+ +7
+ +7) (7) Punch out the top to form it. and,
This metal temporary 16) is connected to the A through hole t'7) of the upper and lower T end plates.
[7117) (7) is tied! Alternately apply elastic plates such as rubber (+31, +3), etc. so as to form a straight V, and adhere uniformly as shown in FIG. 7(a). In addition,
If the elastic plates +31 +3) are made of rubber, this constant adhesion is achieved, for example, by vulcanization bonding, and the metal bending plates at both ends;
61 (6j is a thick rectangular piece with a flange around the periphery for further installation into a structure, and a through hole for damming is provided at a position corresponding to the through hole in the metal plate (6) +71 +71
+7+ +71 Those who wait for everything are fully open.

The owner of this isolator;
It was installed on e+... - By changing the thickness and depth of the through hole (7) (5), various characteristics can be improved depending on the scale of the structure.

In other words, the size of the through hole (7) or the force increaser (reduction)
When kneaded, the vertical spring stiffness decreases (increases) and the horizontal spring stiffness decreases (increases). Utilizing this fact, it is possible to process the pre-fabricated isolator (8) to obtain a KG (D) isolator that fits the structure (4). That is, using a drill and a chi, The elastic plate 161 (6r'...e
The through-hole (7) is then cut. and through hole (7)
An isolator (8) can be provided with pressure characteristics corresponding to the diameter of .

2. It is also possible to make a custom-made isolator by injecting a d-type material with the same or different hardness into this through hole 17). , it is possible to increase the vertical spring rigidity and increase the horizontal spring rigidity.In addition, even if a 1jllI body such as a steel rod is enclosed in the vertical spring together with the elastic body, it is possible to increase the rigidity of the vertical spring and increase the rigidity of the horizontal spring. The same effect can be obtained as in the case where

(6) Ma11 Part 1. L, Shishiaki, Me11's isolator (8
) is Tani Metal 'tR:1ilf61' ” ” ” K
pierce san 之、1 JIfJ hole 171171 (7)
(71) The positions are aligned with the upper and lower blades I + jj, but it is not necessarily necessary to align them between the upper and lower sides. and if the sizes are different, the isolator in this case (
For the characteristics of 8), 11 chopsticks are made by preparing a metal plate with 16 holes in advance, and then adding several kinds of sogen-saka to the required characteristics of the isolator. In combination, this will be made by laminating alternately with 51-grade plates such as this bamboo and iris Karikura rubber. What are the advantages of this lifting platform for manufacturing L7 isolators? Layering iso1 nota・1. #
Since only a few types of molds and the like are required for the production, it is possible to manufacture isolators with arbitrary characteristics by simply using several types of metal plates.

Next, I will explain an example of how to make an isolator.

General reinforced concrete construction 21, as isolator Kumquat structure Suga-nos? The average structures of this drug, assuming a storied arresting proboscis, are as follows.

That is, E3D-30 is used for steel, Fc is used for concrete, -2iOC loading capacity 2/θ suppression 7°-) - average I1
What is the 1 output? 0~j 0ton (pressure applied to each concrete support), the natural period of the building is 0, /~θ, -?
Seconds.

If the isolators used in buildings with the above-mentioned structures are to be placed firmly under each column, the average axial force (,?0 ~j Q ton ) is required. In addition, regarding the horizontal stiffness of the isolator, the maximum period of the seismic wave, the component (0
, 7 seconds to 7.0 seconds). Therefore, the horizontal spring stiffness of the isolator (8) is 1
J% approx. 5O,? It is necessary to set the size to θθ~ri00 "E7゜. □ For the purpose of manufacturing an isolator that is custom-made to meet my own requirements, I am waiting for the next size and shape and material purchase. did.

In other words, it is a metal plate for writing and correcting in the direction of the first direction.
As +61, use a steel plate (SEI41) with a thickness of 1 mm, and as an elastic plate +31 (31""'
A rubber disc with a diameter of f4I and a thickness of 3 o o mm.
Use 2 pieces, and 1 elastic plate each +31 +31...1
As for the metal plate between Tsukasa +61 +61...? 00m
A steel plate (S841) with a diameter of one section of m≠ is used.

h O6 Gold M Plate I t6rt81f61-・#K, set the upper and lower positions of the solenoid to h6, and make them straight c4jθ, respectively.
A through holes of mmφ +7] +71 +71 +71
is perforated, and each metal plate te1+6ffis++s
＋ −−* Doro luck i+31+31− e * t
It is integrated with the ti blade tip and sulfur adhesive. The characteristics of the rubber disc are as shown in 1 and 1j in the following table.

Table - Physical Properties of Rubber Table: 7 degrees of rubber:, 72 degrees: J',, kgf/. Engineering 2jo staff member Modulanu: 5. jkgf/. -/θθthymodulanu 2♂, 3 equals/. m2 tensile-J skewness Hip ri knshi. m2-Vlv6-Al sexual rate: ,5. ．． 2k
gf/ll, m2 (9) Elongation 2 to 30 cm The characteristics of the isolator with these values and materials were measured by demonstration and the following 4 results were obtained. The strain δ in the direction of lead 11 relative to nitrogen was measured, and a custom order was obtained as shown in the following. In this experiment, no lateral deformation was observed until the compressive force N reached θton (stress degree σ = 2.ro kg/m2). King of concrete RL'6 degrees σ.=20kQ7..2
Compared to 3. , IQ is the size of f, i.e., the safety factor of 3 times or more - kn is the 0 housing that can use this isolator (8). At fC, compressive stress degree σ.

is 2θ~risθ/. In the range of m2, 22~jO2
It can be seen that the horizontal spring with a cape of 7 mm is expected, and this isolator 18) has an original V
It has been shown that it is necessary to wait for the required characteristics, and using the isolator (8) for general reinforced concrete construction 2, J shield building, an isolator (8) with the resilience and material of the above production example is used. If you prepare the isolator and adjust it according to the characteristics and notes that the isolator should have depending on the location and construction conditions, you can make a kind of Isolators can meet a variety of demands.

The isolator 18) in the above example is made of general reinforced concrete 21,? Although it was manufactured to be compatible with one-person buildings, it can also be used as a separate building structure if the application corresponds to the properties obtained by the above-mentioned adjustment using through holes. If the isolator 18) is placed under the note of /1-, the useful range of 7 will be further expanded, and it will be further improved.・Nko, isolator 181
f! : Other than the above-mentioned example, the dimensions of the cedar folding □ Also, the four-layer construction of the cylinder by splitting and spacing the material, and various constructions such as small mechanical devices, isolators made of metal with ifi &"c7t1, etc. [So, for each of these 14 structures, one specific requirement (11) - through hole, fs+... isolator.

As explained above, the through holes provided in the isolator allow the isolator to be adjusted to the characteristics of vertical and horizontal springs. →Since the 1j property can be easily adjusted, −
A large number of isolators can meet various demands.

[Brief explanation of the drawing]

Figure 1 (a) (1)) is an E-side view and a plan view of a conventional isolator, Figure 2 (a side view showing a sill-shaped butterfly with a σ isolator as a structure, and Figure 3 is a side view of the isolator). The seismic isolation effect obtained by isolator size (1) and the case without isolake (Fig. 7(a) ('t)) are shown in comparison with the isolator size case (1) and the case without isolake (Fig. 7(a) ('t)). Fig. 47 (CJ is a plan view showing the shape of the metal plate, Fig. 5 is the compressive force NK between the shells)
It is a figure which shows the magnitude|size of the vertical direction distortion with respect to FIG. (3) @・Elastic board, (4)・1 superstructure (building), +
51@-Substructure (foundation), ts++sl' 11 @
Metal plate, (7) (12) Patent applicant Unitika Co., Ltd. agent゛ Gangwon Province Hide Agohara [13] 4th doctor ° (α) 316 185- Figure 5

Claims (1)

[Claims] +11 A seismic isolation device characterized in that a plurality of metal plates and a plurality of elastic plates above the λ hole are vertically stacked and fixed to each other and arranged in the upper structure and the lower part of the structure. .