JPH0599648A - Automatic measuring method for use in maintenance and management of base isolation building - Google Patents

Abstract

PURPOSE:To save labor and enhance accuracy in the maintenance and management of a base-isolated building by using non-contact sensors to measure the vertical and horizontal displacements of the bottom portion of a building, and using a thermocouple to measure ambient temperature, and collecting and recording the results of measurement on a data logger. CONSTITUTION:The results of measurement by a non-contact laser displacement sensor 27 and two non-contact ultrasonic displacement sensors 31 are collected and recorded on a data logger at fixed intervals and the results of measurement by a thermocouple 50 are also recorded. The records collected are analyzed and the amount of deformation of an upper building 1 as a whole is obtained and also temperature is measured by the thermocouple and so the amount of deformation of the whole building 1 including displacement of laminated rubber caused by creeping of the laminated rubber and seasonal temperature changes is accurately calculated. Also, the use of the non- contact sensors prevents errors due to generation of rust and attachment of dust. Further, the influence of individuals due to manual work and dispersion in the results of measurement are eliminated, and is saved and accuracy is enhanced in the maintenance and management of building.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic measuring method in maintenance and management of a seismic isolated building, which can save labor and improve the accuracy of measuring the displacement of the entire upper building due to the deformation of the seismic isolation device.

[0002]

2. Description of the Related Art FIGS. 3 and 4 show a conventional example of a building supported by a seismic isolation device. The five-story building 1 is supported by a foundation 5 via a plurality of seismic isolation devices 3. This seismic isolation device 3 uses laminated rubber.

An enlarged view of the seismic isolation device 3 is shown in FIG. 5 as an enlarged view of a portion A in FIG. 3 and in FIG. 6 as an enlarged view of a portion B in FIG.
The seismic isolated building supported by such seismic isolation device 3
Periodic inspection of seismic isolation device 3 and extraordinary inspections such as when an earthquake occurs are required. At present, the height 7 of the laminated rubber of the seismic isolation device 3 located at the four corners of the bottom of the building is measured manually by a micrometer or the like. For this measurement, glass plates 11 are attached to the respective flanges 9A and 9B provided above and below the laminated rubber, and the distance between the glass plates 11 is measured.

Further, the bidirectional displacements of the seismic isolation devices 3 at the same four corners in the horizontal plane are measured by the suspended weights 13.
That is, the flange 9 above the laminated rubber that is the seismic isolation device 3
The magnet 15 is attracted to the pair A, and the lower end of the hanging weight 13 fixed to the magnet 15 is displaced in two directions in the horizontal plane depending on where on the scale of the scale plate 17 attached to the lower flange 9B. Is measured manually. Reference numeral 19 in the figure denotes a laminated rubber fixing bolt. In this way, the amount of deformation of the entire upper building 1 and the amount of deformation of each seismic isolation device are obtained by measuring the vertical displacement and the bidirectional displacement in the horizontal plane.

In addition, for a temporary inspection such as when an earthquake occurs, a method has been adopted in which the displacement is measured using a contact type displacement gauge to obtain the amount of deformation of the entire upper building 1.

[0006]

However, according to the conventional technique, the height change (expansion, contraction) of the seismic isolation device 3 and the displacement rate due to the creep due to the temperature changes in the four seasons are not clear, and the entire upper building 1 is not clear. It was difficult to accurately obtain the amount of deformation. Further, according to the contact type displacement meter, rust is generated due to moisture at the contact point or dust adheres to the measurement point, and the measurement error is likely to occur, resulting in a low resolution. Further, when the measurement is performed manually, it takes time and labor for the measurement work, which is troublesome. Furthermore, the accuracy of measurement is not so high because the measurement results tend to vary due to the individuality of the worker who performs the manual work.

The present invention has been made to solve the above problems, and since data can be acquired at regular intervals,
The effects of temperature changes in the four seasons can be accurately grasped, the effects of rust and dust are less likely to occur, the work is easy, and the individuality of the workers does not affect the measurement accuracy. It is an object of the present invention to provide an automatic inspection method for seismic isolation devices that can achieve higher accuracy and higher accuracy.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention does not allow vertical displacement of an upper building bottom supported by a foundation via a seismic isolation device and two-directional displacement in a horizontal plane. It is measured by a contact sensor and recorded in a data logger.

Further, the seismic isolation device and the ambient temperature are measured by a thermocouple and recorded in a data logger.

[0010]

[Operation] Each non-contact type sensor measures the vertical displacement of the seismic isolation device and the bidirectional displacement in the horizontal plane, and the thermocouple measures the temperature of the seismic isolation device and the ambient temperature, and records them in the data logger. ..

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 corresponds to FIG. 5 of the conventional example. FIG. 2 corresponds to FIG. 6 of the conventional example. Foundation for ground 21 (pressure resistant version)
A seismic isolation device 3 is provided through the upper part of the upper building 1
The bottom 23 of the is supported. The seismic isolation device 3 is a laminated rubber, and the flanges 9A and 9A are provided above and below the laminated rubber, respectively.
B is provided and is in contact with the upper building 1 or the foundation 5 via the bases 25A and 25B, respectively.

A non-contact sensor 27 is provided with the lower base 25B as a fixed point so that the displacement between the lower base 25B and the upper base 25A can be measured. The non-contact type sensor 27 is a laser type displacement sensor, and the measurement range is ± 40.
The resolution in mm is generally higher than that of a contact type displacement meter. A non-contact sensor 31 is provided with the arm 29 fixed to the foundation 5 as a fixed point, and the upper base 2 is provided.
The displacement is measured in the horizontal plane of 5A.
Two of these non-contact type sensors 31 are provided to measure displacements in two directions in a horizontal plane. These two directions are orthogonal (Fig. 2). These two non-contact type sensors 31 are ultrasonic type displacement sensors, the measuring range is 60 to 300 mm, and the touch function is ±.
1% F.I. It is S. The measurement results are recorded in a data logger (not shown) at regular intervals (about once per hour at regular times and about once every 0.01 seconds during earthquakes).

Further, the seismic isolation device 3 is provided with a thermocouple 50, and the measurement results are recorded in the data logger at the same time when the non-contact type sensors 27 and 31 are measured.

As described above, three non-contact type sensors 27 and 31 are provided for one seismic isolation device 3. The seismic isolation device 3 provided with such non-contact type sensors is one building 1 ( 4) (see FIG. 4), so that a total of 12 non-contact type sensors are provided in one building 1. When the thermocouple 50 is further added, a total of 16 measurement results in one building will be recorded in the data logger.

The collected records become data for analysis processing, and the deformation amount of the entire upper building 1 is obtained.

As described above, since the temperature is measured by the thermocouple at the same time as the displacement is measured, the displacement rate of the laminated rubber due to the creep of the laminated rubber and the temperature change of the four seasons is collected as data at every constant time, and the upper building is constructed. The deformation amount of the whole 1 can be accurately obtained, and the deformation of this seismic isolation device can be calculated. Further, since the contact portion is eliminated by using a non-contact sensor such as a laser or an ultrasonic wave, there is no possibility of causing an error due to rust due to moisture or dust adhering to the contact portion as in the conventional case. .. Furthermore, since the measurement results are automatically recorded in the data logger, there is no need for the operator to perform manual measurement work each time a periodic inspection or an extraordinary inspection is performed. In addition, the personality of the operator does not affect the measurement results due to the manual work. Therefore, it is possible to save labor and improve the accuracy of maintenance of the seismic isolated building.

Although the seismic isolation device 3 is described as a laminated rubber in the above embodiments, other seismic isolation devices such as a slide bearing may be used in other embodiments.

[0018]

As described above, according to the automatic inspection method for the seismic isolation device of the present invention, the contact point is eliminated by performing the measurement with the non-contact type sensor, and the contact point is rusted or rusted as in the conventional case. It is possible to eliminate the risk of dust being attached and causing an error. In addition, the operator does not have to perform the manual measurement, and the individuality of the operator does not affect the measurement result and the variation does not occur, and labor saving and high accuracy of the maintenance of the seismic isolated building can be achieved. Furthermore, by measuring the temperature with a thermocouple, the displacement rate associated with temperature changes during the four seasons can be accurately grasped, and the amount of deformation of the entire upper building can be accurately obtained.

[Brief description of drawings]

FIG. 1 is a side view of a seismic isolation device according to an embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a side view of the entire building supported by the seismic isolation device.

FIG. 4 is a plan view of FIG.

5 is an enlarged view of part A of FIG.

FIG. 6 is an enlarged view of part B in FIG.

[Explanation of symbols]

 1 Building 3 Seismic Isolation Device (Laminated Rubber) 5 Foundation 27 Laser Displacement Sensor 31 Ultrasonic Displacement Sensor 50 Thermocouple

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takashi Nakamura 4-640 Shimoseido, Kiyose-shi, Tokyo Inside Obayashi Technical Research Institute Co., Ltd.

Claims (2)

[Claims] 1. A non-contact sensor for measuring the vertical displacement of the upper building bottom supported by a foundation via a seismic isolation device and the two-direction displacement in the horizontal plane, and collecting the data in a data logger. Automatic measurement method in maintenance. 2. The seismic isolation device and the ambient temperature are measured by a thermocouple and recorded in a data logger.
Automatic measurement method for maintenance of seismic isolated building described.