JP2001091398A - Method and device for testing characteristics of vibration-isolation member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a test method and device that can verify the influence being given to the characteristics of a vibration-isolation member by the deformation of a periphery structure member where the vibration-isolation member is mounted, or the like. SOLUTION: A test body is used for testing characteristics. In the test body, a deformation member for simulating the deformation of a periphery structure member where a vibration-isolation member is mounted or the like is mounted above and below the base-isolation member.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of a test method and a test apparatus for testing and evaluating the characteristics and reliability of a seismic isolation member. The present invention relates to a test method and a test apparatus capable of verifying the influence of deformation or the like on the characteristics of a seismic isolation member.

[0002]

2. Description of the Related Art Conventionally, a seismic isolation member 1 installed between upper and lower structural members 11, 12 which can be assumed to be sufficiently rigid as shown in FIG.
As shown in FIG. 9, the upper and lower sides of the seismic isolation member 1 which is the specimen A are attached to the lower end of the rigid upper force plate 4 and the upper end of the lower force plate 5, respectively. In general, a method of horizontally or dynamically moving the lower load plate 5 while restraining the rotation of the plates 4 and 5 to generate shear deformation of the seismic isolation member 1 (specimen A). Is being done. More specifically, the following method is known.

As shown in FIG. 10, a seismic isolation element testing apparatus described in Japanese Patent Application Laid-Open No. Hei 6-26982 guides a lower end of a seismic isolation member 1 which is a test body A in a horizontal direction by a hydrostatic bearing d. To the vibration table e. The upper end of the test piece A is attached to a vertical guide shaft g guided in the vertical direction by a hydrostatic bearing f, restrains the rotation of the vibration table e, horizontally vibrates while maintaining the parallelism, and the seismic isolation member 1 Perform a characteristic test.

[0004] The above-mentioned prior art test method uses the seismic isolation member 1.
In the seismic isolation structure (see, for example, FIG. 8) in which the upper and lower structural members 11 and 12 to which the base member is attached are assumed to be sufficiently rigid, the correlation between the horizontal load and the deformation, which are the basic characteristics of the seismic isolation member 1, is determined. It is possible to study, and by fixing the test conditions, it is possible to avoid data variations as much as possible.

[0005]

However, at present, the range of application of the seismic isolation structure has been expanded, and there is also a seismic isolation structure in which it is not possible to assume that the upper and lower structural members 11 and 12 to which the seismic isolation member 1 is attached are sufficiently rigid. . For example, the seismic isolation member 1 is installed at the middle of the column or at the column head, or the seismic isolation member 1 is installed at the head of the concrete pile 9 as shown in FIG. When a horizontal force is generated due to an earthquake or the like in a seismic isolation structure that is reduced in size, the phenomena described in the following 1) to 4) occur.

1) Shear deformation occurs in the seismic isolation member 1.

2) The bending moment (the bending moment due to the P-δ effect) obtained by multiplying the horizontal deformation amount of the seismic isolation member 1 by the vertical load is applied to the upper and lower structural members 11 on which the seismic isolation member 1 is mounted.
12 is transmitted. This bending moment is distributed to the upper and lower structural members 11 and 12 according to the ratio of the degree of fixing (rigidity) of each.

3) Rotational deformation occurs in the upper and lower structural members 11 and 12 to which the seismic isolation member 1 is attached due to the horizontal load and the bending moment due to the P-δ effect. Of these, the seismic isolation member 1 is tilted by the amount of rotational deformation generated at the lower part of the seismic isolation member 1.

4) The value obtained by multiplying the amount of inclination by the vertical load acts as a force for increasing the shear deformation of the seismic isolation member 1, and the deformation state of the seismic isolation layer is determined by the mounting portion of the seismic isolation member (upper and lower structural members). 11 and 12) are far from the conditions when they are sufficiently rigid. Strictly, the seismic isolation member 1 itself is slightly deformed in bending (rotation), and the force for increasing the shear deformation of the seismic isolation member 1 further increases.

[0010] In this regard, the above-mentioned conventional test method is as follows.
Since the upper and lower structural members 11 and 12 to which the seismic isolation member 1 is attached are assumed to be sufficiently rigid and the test method does not consider the influence of the deformation of the upper and lower structural members 11 and 12 on the seismic isolation member 1, The characteristic test results did not correspond to the seismic isolation structure in which phenomena such as 1) to 4) occur, and it was impossible to directly examine the characteristics of the seismic isolation member 1 by the characteristic test.

An object of the present invention is to directly examine the influence of the deformation of the upper and lower structural members on the characteristics of the seismic isolation member, so that the characteristic test results can be obtained even for the seismic isolation structure where the upper and lower structural members cannot be assumed to be sufficiently rigid. Accordingly, it is an object of the present invention to provide a characteristic test method and a characteristic test apparatus for a seismic isolation member that can directly examine the characteristics of the seismic isolation member by a characteristic test.

[0012]

According to a first aspect of the present invention, there is provided a method for testing the characteristics of a seismic isolation member, comprising the steps of: A characteristic test is performed using a test body in which a deformable member simulating deformation of a peripheral structural member to which the seismic isolation member is attached is attached above and below the seismic isolation member.

According to a second aspect of the present invention, there is provided a method for testing characteristics of a seismic isolation member, the method comprising the steps of: A characteristic test is performed by attaching a deformable member that simulates the above and the like, and attaching a seismic isolation member to the deformable member of the load plate.

According to a third aspect of the present invention, in the method for testing the characteristics of a seismic isolation member according to the first or second aspect, the deformable member is a stress sharing state of a peripheral structural member derived from an analysis result of the seismic isolation structure. And, based on the rotation angles and the like generated at the upper and lower edges of the seismic isolation member, rigidity conditions substantially equal to those of the peripheral structural member are provided.

According to a fourth aspect of the present invention, in the method for testing the characteristics of a seismic isolation member according to the first or second or third aspect, the deformable member may be an iron plate, a steel assembly, a spring material, or a laminate. It is characterized by being composed of a member such as rubber.

According to a fifth aspect of the present invention, there is provided an apparatus for testing characteristics of a seismic isolation member, wherein a load transmitting spherical surface is provided on an upper surface of an upper deformation member and a lower surface of a lower deformation member. A spherical seat is provided on the lower surface of the upper force plate and the upper surface of the lower force plate via a sliding plate, and the corresponding load transmitting spheres are set in a freely movable state capable of transmitting only a vertical load to the spherical seat. Both ends of the upper and lower deformable members are pin-joined to a mounting member of the characteristic test device, and a seismic isolation member as a test body is mounted between the upper and lower deformable members so that a characteristic test can be performed. Features.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION The characteristic test method of the present invention is applied to a seismic isolation structure under conditions where the surrounding structural members to which the seismic isolation member 1 is attached cannot be assumed to be sufficiently rigid, for example, in the middle of a column or a column head. This method is suitably implemented when directly examining the characteristics of the seismic isolation member 1 to be installed or the seismic isolation member 1 installed on the head of the concrete pile 9 as shown in FIG.

The seismic isolation member 1 according to the first aspect of the present invention.
As shown in FIG. 1 as an example, the characteristic test method is carried out using a characteristic test apparatus having a configuration similar to that of the conventional example in FIG. 9 in principle. A characteristic test method according to a second aspect of the present invention is characterized in that a characteristic test is performed by the characteristic test device illustrated in FIG.

First, an embodiment of the present invention will be described. In this characteristic test method, the upper and lower deformable members 2 and 3 simulating deformation and the like of a peripheral structural member to which the seismic isolation member 1 is attached are combined with a specimen A in which the upper and lower deformable members 2 and 3 are attached above and below the seismic isolation member 1 as shown in FIG. It is characterized by performing a characteristic test using the same.

The seismic isolation member 1 is a laminated rubber that is an isolator used in a seismic isolation structure.

The peripheral structural member is a so-called seismic isolation layer, and is a peripheral member to which the seismic isolation member 1 is attached, for example, the middle of a column or a column head, or a condition that cannot be assumed to be sufficiently rigid as shown in FIG. It points to the concrete pile 9.

Simulating the deformation or the like of the peripheral structural member means that the phenomena 1) to 4) described in the above-mentioned problem to be solved are reproduced in the above-described characteristic test apparatus. As means therefor, the upper and lower deformable members 2 and 3 are arranged on the periphery based on the stress sharing state of the peripheral structural members derived from the analysis result of the seismic isolation structure and the rotation angles generated at the upper and lower edges of the seismic isolation member 1. Stiffness conditions equivalent to those of structural members are provided.
Invention).

Means for analyzing the seismic isolation structure is described in, for example, "Seismic isolation considering the flexibility of the mounting part" by Mitsuo Asano and Shigeo Minewaki published in the Japanese Architectural Technical Report (Building Magazine No. 8 Extra Number). As described in “Evaluation of Horizontal Rigidity of Laminated Rubber Bearing”, seismic isolation member 1 and peripheral structural members are integrally analyzed. For example, the seismic isolation member 1 shown in FIG. 2 is made of laminated rubber having a diameter of 800 mm, the upper part of which is attached to a relatively stiff first-floor floor beam 8 (about 2000 mm) of a reinforced concrete structure, and the lower part is relatively light. Mat slab 10 (thickness 700
Cast-in-place concrete pile 9 with stiffened head
Analyzing the seismic isolation structure when it is installed on a (1500 mm diameter, 4500 mm span), the bending moment distribution ratio between the first floor beam 8 and the concrete pile 9 on which the seismic isolation member 1 is installed is about 4: 1. When the horizontal load per one place of the seismic isolation member 1 is 50 ton, the analysis result that the rotation angle of the lower part of the seismic isolation member 1 becomes about 1/200 is obtained.

Based on the above analysis results, when the miniaturized seismic isolation member 1 is used for the test piece A and a characteristic test is performed using the characteristic test device having the configuration shown in FIG.
3 converts the analysis result by the ratio of the size of the seismic isolation member 1 actually used in the seismic isolation structure and the seismic isolation member 1 used in the characteristic test, and gives rigidity conditions to the upper and lower deformable members 2 and 3. Design. Specifically, when a characteristic test is performed using the seismic isolation member 1 made of laminated rubber having a diameter of 350 mm as the specimen A, the diameter ratio and the height ratio of the seismic isolation member 1 are 2.3: 1,
Considering that the area ratio is 5.2: 1, rotation at the lower part of the seismic isolation member 1 with respect to the horizontal load of 1 / 5.2 and the bending moment of 1 / 12.0 of the above analysis result. Corner is 1/20
The lower deformable member 3 that satisfies the rigidity condition of about 0 is designed, and the upper deformable member 2 is designed so that the rigidity condition is four times as large as the lower deformable member 3.

When the upper and lower deformable members 2 and 3 satisfying the above rigidity conditions are designed by using a steel frame, the lower deformable member 3 is an assembled box material having a width of 160 mm, a width of 500 mm and a thickness of 29 mm, and a length of 900 mm. The upper deformable member 2 is an assembly box material having the same cross section, and can have a length of 225 mm.

In the above embodiment, the upper and lower deformable members 2 and 3 are made of steel frames. However, if the members can simulate the deformation of the peripheral structural members, the above is not the case. Or a laminated rubber.
Invention).

The characteristic test method of the seismic isolation member 1 is based on a test in which upper and lower deformable members 2 and 3 simulating deformation of peripheral structural members to which the seismic isolation member 1 is attached are attached to the upper and lower portions of the seismic isolation member 1. Since the characteristic test is performed using the body A, it is possible to directly examine the influence of the upper and lower deformable members 2 and 3 on the characteristics of the seismic isolation member 1. In other words, it is possible to directly examine the influence of the deformation of the peripheral structural member on the characteristics of the seismic isolation member 1, and to determine the characteristics of the seismic isolation member 1 having the seismic isolation structure in which the peripheral structural member cannot be assumed to be sufficiently rigid. Test results can be handled.

FIG. 3 shows an embodiment of the second aspect of the present invention. This characteristic test method includes upper and lower deformable members 2 and 3 on upper and lower force plates 4 and 5 of the characteristic test apparatus.
The seismic isolation member 1 as the test body A is set on the upper and lower force plates 4 and 5 to perform a characteristic test.

In the characteristic test apparatus shown in FIG. 3, a load transmitting spherical surface 6 is provided on the upper surface of the upper deformable member 2 and the lower surface of the lower deformable member 3, and the lower surface of the upper load plate 4 and the lower load plate 5 A spherical seat 7 is provided on the upper surface via a slide plate 15, and the corresponding load transmitting spherical surfaces 6 are combined so as to be able to transmit only a vertical load to the spherical seat 7. Then, both ends of the upper and lower deformable members 2 and 3 are respectively joined to the mounting members 13 of the upper and lower force plates 4 and 5 with pins 14 as test specimens A between the upper deformable member 2 and the lower deformable member 3. Is characterized in that the seismic isolation member 1 is mounted so that a characteristic test can be performed (the invention of claim 5).

Therefore, according to the characteristic test apparatus shown in FIG. 3, the labor for attaching the upper and lower deformable members 2 and 3 to the individual seismic isolation member 1 which is the specimen A can be omitted, and the seismic isolation member 1 can simply be moved up and down. A characteristic test can be performed by attaching the upper and lower deformable members 2 and 3 of the load plates 4 and 5 (the invention of claim 2).

The upper and lower deformable members 2 and 3 need to be designed in accordance with the size of the seismic isolation member 1 and the conditions of the peripheral structural members. In most cases, the adjustment of the iron plate thickness is sufficient.
This can be done without significantly changing the characteristic test apparatus of FIG.

When the upper and lower deformable members 2 and 3 used in this characteristic test apparatus for a full-size seismic isolation member 1 having a diameter of 800 mm are designed with an iron plate, the lower deformable member 3 has a thickness of 120 mm and a width of 1000 mm. Thus, the lengths to the pin support points at both ends are each 1000 mm. The upper deformable member 2 has a thickness of 190 mm, a width of 1000 mm, and a length up to the pin support points at both ends can be defined as 1000 mm. The bending moment at the lower end of the seismic isolation member 1 (laminated rubber) is approximately 14000 ton · cm, which is obtained by analysis results under the load conditions of a vertical load of 500 ton and a horizontal load of 50 ton, and is received by the lower deformable member 3 having left and right ends joined by pins. Thereby, a rotation angle of about 1/200 can be generated at the lower end of the laminated rubber.

The upper and lower deformable members 2 and 3 designed as described above are attached to the respective mounting members 13 of the characteristic test apparatus shown in FIG.
Both ends are joined by pins 14, and a predetermined load is applied to the full-size seismic isolation member 1 (test body A) to perform a characteristic test.

In the characteristic test apparatus shown in FIG. 3, the vertical load applied to the upper load plate 4 is directly transmitted to the lower load plate 5 because the load transmitting spherical surface 6 and the spherical seat 7 are in contact with each other. Even if the upper and lower deformation members 2 and 3 are installed horizontally, the bending moment transmitted is only the bending moment generated at the end of the seismic isolation member 1. Therefore, even when the characteristic test is performed using the full-size seismic isolation member 1 as the test body A, it is easy to design the upper and lower deformable members 2 and 3 within the elastic limit.

Further, since both ends of the upper and lower deformable members 2 and 3 are rotatably joined by the pins 14, the distribution form of the bending moment that causes the upper and lower deformable members 2 and 3 to rotate is clearly defined. It is possible to simulate the deformation and the like of the peripheral structural member as defined and faithful.

Next, another embodiment of the method for testing the characteristics of a seismic isolation member according to the first aspect of the present invention shown in FIG.
An upper deforming member 2 made of a steel assembly box material connected to the lower center of the upper force plate 4 is attached to the upper center of the upper member, and a deformable member made of a steel frame assembled box material provided in a lower force plate 5 in a tower shape. 3a and a deformable member 3a made of an assembled steel box member connected to the lower center of the seismic isolation member 1 are attached to a deformed member 3a made of an assembled steel frame member provided in the tower shape.

Another embodiment of the method for testing the characteristics of a seismic isolation member according to the first aspect of the present invention shown in FIG. 5 is that a plurality (two) is provided above the seismic isolation member 1 and a plurality (two) is provided below the same. It is characterized in that upper and lower deformable members 2 and 3 made of disc springs are respectively attached.

Another embodiment of the method for testing the characteristics of a seismic isolation member according to the first aspect of the present invention shown in FIG.
The upper and lower deformable members 2, 3 made of laminated rubber whose deformation state has been examined in advance are attached to the upper and lower portions, respectively.

In each case, upper and lower deformable members 2 and 3 for simulating deformation and the like of the peripheral structural members are attached to the upper and lower portions of the seismic isolation member 1, so that the peripheral structural members cannot be assumed to be sufficiently rigid. Characteristic test results can be applied to seismic isolation members.

[0040]

According to the method for testing the characteristics of a seismic isolation member according to the first to fourth aspects of the invention and the characteristic test apparatus according to the fifth and sixth aspects of the invention, the peripheral structure to which the seismic isolation member is attached is provided. Since characteristic tests are performed using test specimens in which deformed members that simulate the deformation of members are attached to the upper and lower parts of the seismic isolation member, the characteristic test results correspond to seismic isolation structures where the surrounding structural members cannot be assumed to be sufficiently rigid. However, it is possible to directly examine the influence of the upper and lower deformable members on the characteristics of the seismic isolation member. In other words, it is possible to directly examine the influence of the deformation of the structural member on the characteristics of the seismic isolation member.

Therefore, the characteristic test results can be applied to a seismic isolation structure in which the peripheral structural members cannot be assumed to be sufficiently rigid.

[Brief description of the drawings]

FIG. 1 is a front view showing a test apparatus used for a method of testing characteristics of a seismic isolation member according to the first aspect of the present invention.

FIG. 2 is a front view of a seismic isolation structure used in an analysis example.

FIG. 3 is a front view showing a test apparatus used for a characteristic test method of a seismic isolation member according to the second aspect of the present invention.

FIG. 4 is a front view showing another embodiment of the method for testing the characteristics of a seismic isolation member according to the first aspect of the present invention.

FIG. 5 is a front view showing another embodiment of the method for testing the characteristics of a seismic isolation member according to the first aspect of the present invention.

FIG. 6 is a front view showing another embodiment of the method for testing the characteristics of a seismic isolation member according to the first aspect of the present invention.

FIG. 7 is a front view of a building in which a seismic isolation member is installed in the middle of a pillar.

FIG. 8 is a front view of a building in which seismic isolation members are installed on the first floor beams.

FIG. 9 is a front view showing a conventional test apparatus.

FIG. 10 is a front view showing a vibration test apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Seismic isolation member 2 Upper deformation member 3 Lower deformation member 4 Upper load plate 5 Lower load plate 6 Vertical load transmission spherical seat 7 Spherical seat 8 First floor beam 9 Cast-in-place concrete pile 10 Mat slab 11 Upper structural member 12 Lower structural member 13 Mounting member 14 Pin 15 Sliding plate A Specimen

Continuing from the front page (72) Inventor Yasunori Tsubakihara 1-5-1, Otsuka, Inzai City, Chiba Prefecture Inside the Technical Research Institute, Takenaka Corporation (72) Inventor Mitsuo Asano 1-5-1, Otsuka 1, Inzai City, Chiba Prefecture Co., Ltd. Inside Takenaka Corporation Technical Research Institute (72) Inventor Akira Nishimura 1-5-1, Otsuka, Inzai City, Chiba Prefecture Inside Takenaka Corporation Technical Research Center (72) Inventor Hiroki Hamaguchi 1-5-1, Otsuka 1, Inzai City, Chiba Prefecture Shares Takenaka Corporation Technical Research Institute

Claims (5)

[Claims] 1. A characteristic test method of a seismic isolation member, wherein a characteristic test is performed using a test body in which a deformation member simulating deformation of a peripheral structural member to which the seismic isolation member is attached is attached above and below the seismic isolation member. A method for testing characteristics of seismic isolation members, which is performed. 2. A method of testing characteristics of a seismic isolation member, comprising: attaching a deformation member simulating deformation of a peripheral structural member to which the seismic isolation member is attached to a force plate of a test apparatus; A characteristic test method for a seismic isolation member, wherein the characteristic test is performed by attaching the seismic isolation member to a deformable member of a power board. 3. The deformable member is substantially equivalent to the peripheral structural member based on the stress sharing state of the peripheral structural member derived from the analysis result of the seismic isolation structure and the rotation angles generated at the upper and lower edges of the seismic isolation member. The method for testing the characteristics of a seismic isolation member according to claim 1 or 2, wherein the method is provided with a rigidity condition. 4. The seismic isolation device according to claim 1, wherein the deformable member is made of a member such as an iron plate, a steel frame assembly, a spring material, or a laminated rubber. Method for testing the properties of components. 5. An apparatus for testing characteristics of a seismic isolation member, wherein a load transmitting spherical surface is provided on an upper surface of an upper deformation member and a lower surface of a lower deformation member, and a lower surface of an upper force plate and an upper surface of a lower force plate. Are provided with a spherical seat via a sliding plate, the corresponding load transmitting spherical surfaces are combined in a free state capable of transmitting only a vertical load to the spherical seat, and both ends of the upper and lower deformable members are subjected to the characteristic test. A characteristic test apparatus for a seismic isolation member, wherein a seismic isolation member as a test body is mounted between the upper deformable member and the lower deformable member so as to enable a characteristic test.