JP2012185058A - Observation system for earthquake and wind in structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To determine a factor of vibrations generated in a structure as an earthquake or a wind with high accuracy just by a vibration sensor, and to separately perform storage processing as earthquake data or wind data.SOLUTION: An observation system for an earthquake and a wind in a structure includes: an A/D converter 4 for converting detection signals from vibration sensors 3a and 3d installed to a structure 1 by a first sampling frequency at every fixed interval of time; data preparation means 9 of an earthquake observation specification, for obtaining the statistic of vibrations at respective observation positions 2a and 2d from converted data; data preparation means 10 of a wind observation specification, for acquiring the statistic of the vibrations at the observation positions by re-sampling the data from the vibration sensor 3d converted in the A/D converter by a second sampling frequency lower than the first sampling frequency; and control means 11 for determining whether the vibrations observed by the vibration sensors 3a and 3d are due to an earthquake or a wind from the data of the earthquake observation specification and the wind observation specification and separately performing storage processing as earthquake data or wind data.

Description

  The present invention relates to an earthquake and wind observation system in a structure for accumulating observation data of vibrations caused by earthquakes and strong winds occurring in various structures such as high-rise buildings.

  In general, seismic design of structures such as high-rise buildings and skyscrapers is based on seismic response analysis using past earthquake records, and wind-resistant design is based on wind pressure distribution by wind tunnel experiments using building models. Etc. are performed based on the above.

  In conducting such earthquake- and wind-resistant designs, if it is verified to what extent the vibration generated in an actual structure during an earthquake or strong wind matches the results obtained in the above analysis, etc., it will be newly established in the future. It is possible to improve the design accuracy of the structure to be improved and improve its safety.

  Therefore, in recent years, in many existing structures, vibration sensors and anemometers are installed to observe vibrations acting on the structures during earthquakes and strong winds over a long period of time, and these are stored as digital data. An earthquake and wind observation system is installed.

  By the way, when recording the vibration generated in the above structure, the vibration caused by the earthquake occurs instantaneously in a short time and the period is short and the amplitude is large, whereas the vibration caused by the strong wind is long time. And has a characteristic that the period is long and the amplitude is small. Therefore, it is necessary to acquire data at a high sampling frequency such as several hundred Hz for vibration due to one earthquake, and it is sufficient to acquire data at a sampling frequency as low as about 1/10 of the vibration due to a strong wind on the other side. There is a difference.

For this reason, if the data is acquired at the same high sampling frequency as that of the observation of the vibration due to the earthquake up to the vibration caused by the strong wind, the high frequency noise is included (the SN ratio of the wind data is deteriorated) and the frequency is not good. A storage device having a large capacity is necessary.
However, if the observation system for vibrations caused by the earthquake and the observation system for vibrations caused by the wind are installed independently, the control or recording means of the approximate configuration will overlap, which is not economical. Cause problems.

  Therefore, in order to solve the problem, in Patent Document 1 below, a method of detecting a vibration of a structure, generating a time-series digital signal representing the vibration of the structure, and recording the generated digital signal. The wind speed is measured to obtain a first statistic relating to the wind speed, and when the obtained first statistic exceeds a first threshold, the digital signal is recorded at a first frequency. And acquiring a second statistic related to the magnitude of the vibration of the structure based on the digital signal representing the vibration, and when the acquired second statistic exceeds a second threshold, There has been proposed a vibration observation method for a structure, wherein the digital signal is recorded at a second frequency higher than the first frequency.

  When the building vibrates due to wind, the conventional vibration observation method configured as described above records a digital signal representing the vibration of the building at a low frequency of the first frequency. By recording digital signals representing vibrations at a frequency of 2, both vibrations due to earthquakes and winds are recorded without unnecessarily recording a large amount of data.

Japanese Patent Laid-Open No. 11-14448

  However, in the conventional vibration observation method for a structure, it is essential to install an anemometer in addition to the vibration sensor in the structure. For this reason, if it is necessary to newly observe vibration due to strong winds in an existing building where only vibration sensors for earthquake observation are installed, a separate anemometer and its power supply and signal line will be installed. There is a problem that it is necessary and the cost increases.

  Further, in a structure such as a high-rise building or a super-high-rise building, vibrations generated during an earthquake or a strong wind are different between a lower floor near the ground of the structure and an upper floor such as a top. For example, the influence of wind vibration is small near the ground of the structure, and the vibration from the ground propagates as it is in the event of an earthquake, whereas the upper floors are shaken during small and medium earthquakes and during strong winds. The shaking may be similar.

  As a result, depending on the installation position of the vibration sensor for the structure, it is difficult to correctly determine whether the vibration generated in the structure is caused by an earthquake or a strong wind. There are also problems.

  The present invention has been made in view of the above circumstances, and without installing an anemometer, the SN ratio of wind data is ensured, and the cause of vibration generated in a structure with only a vibration sensor can be accurately earthquakeed. Another object of the present invention is to provide an observation system for earthquakes and winds in a structure that can be judged as wind and separately stored as earthquake data or wind data.

  In order to solve the above-mentioned problem, the invention described in claim 1 converts a vibration sensor installed on a structure or ground and a detection signal from the vibration sensor into digital data of an earthquake observation specification at a first sampling frequency. A / D converter to perform, seismic observation data creation means for obtaining statistical values at regular intervals from vibration digital data converted by the A / D converter, and conversion by the A / D converter Resampling means for acquiring the digital data of the vibration obtained at a second sampling frequency lower than the first sampling frequency, and a statistical value for each predetermined time from the digital data of vibration generated by the resampling means. From the observation data of the wind observation specifications and the data of the earthquake observation specifications and wind observation specifications. Control means for determining whether the motion is caused by an earthquake or wind and separately storing the data as earthquake data or wind data, and the control means in the data of the earthquake observation specification If the statistical value is greater than or equal to a preset first threshold value due to seismic vibration, it is determined that the vibration observed during the predetermined time is caused by an earthquake, and is less than the first threshold value. And, when the statistical value in the data of the wind observation specification is equal to or greater than a second threshold value due to the wind vibration set in advance, it is determined that the vibration observed in the predetermined time is caused by the wind. It is characterized by.

  Here, the invention described in claim 2 is characterized in that, in the invention described in claim 1, the resampling means includes a noise removing means for eliminating high frequency noise. .

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the upper vibration sensor installed on the upper floor including the top of the structure and the lower floor of the structure including the ground. And the control means is configured such that the statistical value of the vibration of the lower floor in the data of the earthquake observation specification is equal to or higher than the first threshold value of the lower floor set in advance. And the statistical value of the upper floor in the data of the wind observation specification that is less than the first threshold value and is determined that the vibration observed in the predetermined time is caused by an earthquake, When it is equal to or higher than the second threshold value of the upper floor set in advance, it is determined that the vibration observed in the predetermined time is caused by wind.

  Furthermore, the invention according to claim 4 is the invention according to claim 3, wherein the control means determines that the vibration observed at a certain time before the certain time is caused by an earthquake. In the case where the statistical value of the vibration of the lower floor in the data of the earthquake observation specification observed at the certain time is a third due to the earthquake vibration of the lower floor that is smaller than the first threshold set in advance. If the statistical value of the upper floor vibration is greater than or equal to a preset fourth threshold value due to the earthquake vibration of the upper floor, the vibration observed in the predetermined time is the above It is characterized by judging that it is caused by an earthquake.

  On the other hand, the invention according to claim 5 is the invention according to claim 1 or 2, wherein the horizontal vibration sensor and the vertical vibration sensor installed on the upper floor including the top of the structure. And the control means includes the statistical value of the vertical vibration of the upper floor in the data of the earthquake observation specification, wherein the first statistical value in the vertical direction due to the earthquake of the upper floor is set in advance. If it is greater than or equal to a threshold value, it is determined that the vibration observed in the certain period of time is due to an earthquake, is less than the first threshold value, and is in the horizontal direction of the upper floor in the data of the wind observation specification. When the statistical value is equal to or higher than the preset second threshold value in the horizontal direction of the upper floor, it is determined that the vibration observed in the certain time is caused by wind. Is.

  According to a sixth aspect of the present invention, in the invention according to the fifth aspect, the control means determines that the vibration observed at a certain time before the certain time is caused by an earthquake. The upper floor seismic vibration in which the statistical value of the upper floor vertical vibration in the data of the earthquake observation specifications observed at the predetermined time is smaller than the first threshold value set in advance. When it is equal to or higher than the third threshold value in the vertical direction due to or when the statistical value of the horizontal vibration of the upper floor is equal to or higher than the fourth threshold value in the horizontal direction due to the earthquake vibration of the upper floor set in advance In addition, it is characterized in that it is determined that the vibration observed during the predetermined time is caused by the earthquake.

  In addition, in the invention according to any one of claims 1 to 6, the first threshold and the second threshold due to the seismic vibration of the lower floor, the threshold due to the earthquake vibration of the upper floor and the threshold due to the wind vibration are set in advance. Are the same as the statistical values acquired by the means for creating the earthquake observation specification data or the wind observation specification data (for example, if the acquired statistical value is the maximum value, the threshold value is also the maximum vibration value) ). In addition, as the threshold value set in advance, values obtained by an earthquake response analysis using past earthquake records, a wind tunnel experiment using a building model, and a correction value based on previous observation data with respect to the above values Etc. can be used.

  Further, as the statistical value, an average value, a maximum value, an RMS value, a minimum value of vibration, a standard deviation, a peak factor, and the like of vibrations observed during the certain time can be used. These ratios, differences, etc. can also be applied.

  According to the invention according to any one of claims 1 to 6, the data of the earthquake observation specification is acquired at a first sampling frequency with a high frequency suitable for the observation of the ground motion, and the data of the wind observation specification is obtained. Since the second sampling frequency lower than the first sampling frequency is acquired, an excessive storage capacity is not required even when earthquake data and wind data are finally stored separately.

  In addition, by comparing the statistical values in the data of the earthquake observation specifications and the data of the wind observation specifications with the first threshold value caused by the earthquake vibration and the second threshold value caused by the wind vibration, the constant value is obtained. Since it is judged that the vibrations observed over time are caused by the wind, it is possible to determine the cause of the vibration generated in the structure with only the vibration sensor as an earthquake or wind with high accuracy without installing an anemometer. As a result, it is possible to separately store the data as earthquake data or wind data.

  By the way, when the present general-purpose device is used as the A / D converter, when a detection signal from the vibration sensor is acquired at a high sampling frequency of several hundred Hz, a lot of high-frequency noise is included. Yes. For this reason, if the obtained digital data is resampled at a low frequency of about 1/10 as it is, the statistical value of vibration with a low level such as wind is accurately identified when compared with the threshold value. It is difficult.

  In this regard, in the invention according to claim 2, since the resampling means includes a noise removing means for eliminating high-frequency noise, the resampling means obtains the second sampling frequency. It is possible to obtain the statistical value of vibration at the observation position with high accuracy from the digital data.

  According to the invention described in claim 3, in the control means, the statistical value of the vibration of the lower floor in the data of the earthquake observation specification with less influence of the vibration due to the wind, and the earthquake of the lower floor set in advance Compared with the first threshold value due to vibration, if it is greater than or equal to the first threshold value, it is determined that the vibration observed in the predetermined time is caused by an earthquake, so the upper layer of the structure In this case, it is possible to eliminate the vibration data observed during a strong wind and to make an accurate judgment.

  Furthermore, if it is determined that the vibrations observed for a certain period of time are not due to an earthquake based on the data of the earthquake observation specifications, the statistics of the upper floors in the data of the wind observation specifications that are greatly affected by the vibrations of the wind The value is compared with a preset threshold value due to wind vibration of the upper floor, and if it is equal to or greater than the threshold value, it is determined that the vibration observed in the predetermined time is due to the wind. It is possible to acquire data on vibrations caused by winds that are distinct from vibrations caused by earthquakes.

  On the other hand, in the invention described in claim 5, in the upper layer portion of the structure, vibration occurs in both the horizontal direction and the vertical direction during an earthquake, whereas in the strong wind, significant vibration occurs in the vertical direction. Focusing on the fact that large vibrations occur mainly in the horizontal direction, a horizontal vibration sensor and a vertical vibration sensor were installed in the upper layer, and were observed only by these upper layer vibration sensors. Since it can be determined whether the vibration is caused by an earthquake or wind, the system can be further simplified.

  Furthermore, according to the third and sixth aspects of the invention, when it is determined that the vibration observed at a certain time before the certain time is caused by an earthquake, the vibration is observed at the certain time. In addition, the statistical values of the lower and upper floor vibrations in the data of the earthquake observation specifications (Claim 2) or the statistical values of the vertical and horizontal vibrations of the upper floor (Claim 5) are After confirming that it is due to the earthquake, it can be stored as earthquake data.

It is a schematic block diagram which shows 1st Embodiment of the observation system of the earthquake and wind in the structure which concerns on this invention. FIG. 3 shows a previous stage of a flowchart in the control means of FIG. 1. FIG. FIG. 3 shows a subsequent stage of the flowchart of FIG. 2. It is a schematic block diagram which shows the 2nd Embodiment of this invention. FIG. 5 shows a previous stage of a flowchart in the control means of FIG. 4.

(First embodiment)
Based on FIGS. 1-3, 1st Embodiment of the observation system of the earthquake and wind in the structure of this invention is described.
FIG. 1 shows a schematic configuration of the above observation system. In this observation system, in order to observe the behavior of a high-rise building (structure) 1 during an earthquake or strong wind, Vibration sensors 3a, 3b, 3c, and 3d are respectively installed on the first floor (lower floor) 2a, the middle floors 2b and 2c, and the top (upper floor) 2d). Incidentally, the vibration sensors 3a to 3d are provided in two horizontal directions (XY directions), and a displacement sensor, a speed sensor, or an acceleration sensor can be used as the vibration sensors 3a to 3d.

  The observation system includes an A / D converter 4 that converts detection signals from the vibration sensors 3a to 3d into vibration digital data at a high frequency of 100 Hz (first sampling frequency), and the A / D conversion. A personal computer (hereinafter abbreviated as PC) 5 in which the digital data converted by the device 4 is transmitted in real time, and an IIR filter (noise removal means) 6 is used for the digital data based on a control signal from the PC 5. Re-sampling means 7 for re-sampling at a low frequency (second sampling frequency) of 10 Hz by performing the decimation process.

  Here, the PC 5 is a well-known one in which a storage medium 8 such as an HDD is connected to the CPU via an interface, and the digital data transmitted from the A / D converter 4 is stored in the storage medium for 10 minutes ( A program that creates a file every predetermined time) and saves it in the storage medium 8 as 100 Hz data for 10 minutes, and transmits the 100 Hz data to the noise removing means 6 to perform decimation processing, A program that is created and stored in the storage medium 8 as 10 Hz data for the 10 minutes is incorporated.

  The PC 5 also has a program for calculating the maximum value and RMS value (statistical value) of vibration at each of the observation positions 2a to 2d within 10 minutes from the 100 Hz data stored in the storage medium 8. Data creation means) 9 and a program for calculating the maximum value and RMS value (statistical value) of vibration at each observation position 2a to 2d within 10 minutes from the 10 Hz data (wind observation specification data creation means) ) 10 is incorporated.

Further, the PC 5 has a threshold value α ₁ (for example, 1.0 Gal) for determining whether or not the vibration generated in the first floor 2a in advance is caused by the occurrence of an earthquake, and a threshold value smaller than this. In addition, the threshold value α ₂ (for example, 0.8 Gal) for determining whether or not it is caused by the continuation of the earthquake, and the vibration generated at the top 2d are caused by the shaking after the earthquake. whether the threshold alpha ₃ for determining, and vibration generated in the top portion 2d, the threshold alpha ₄ for determining whether or not due to the strong wind is set.

And in this PC5, whether the vibration generated in the high-rise building 1 is caused by an earthquake based on the maximum value of vibration for 10 minutes obtained by the programs 9 and 10 and the threshold values α _{1 to} α ₄ A control program (control means) 11 for determining whether it is caused by the wind and saving each seismic data or wind data in a separate folder created in the storage medium 8 is incorporated.

Next, based on FIG. 2 and FIG. 3, the structure of the said control program 11 is demonstrated with the effect | action.
First, as shown in FIG. 2, in this control program, one of the maximum values of vibration in the XY direction of the first floor 2a in the 100 Hz data (data of the earthquake observation specification) calculated by the program 9 is the threshold α _When it is ₁ or more, it is determined that the vibration observed during the 10 minutes is caused by an earthquake, and the 100 Hz data is stored in the storage medium 8 as earthquake data.

On the other hand, if the maximum value of the vibration in the XY direction of the first floor 2a in the 100 Hz data is less than the threshold value α _1, it is determined whether or not the previous 10 minutes was earthquake data, 3 is not earthquake data, the strong wind determination shown in FIG. 3 is further performed. When the maximum value of the top 2d in the 10 Hz data (wind observation specification data) is equal to or greater than the threshold value α ₄ due to wind vibration, it is determined that the vibration observed during the 10 minutes is caused by the wind. Then, the 10 Hz data is stored in the storage medium 8 as wind data.

On the other hand, as shown in FIG. 2, it is determined whether or not the previous 10 minutes was earthquake data. If the previous 10 minutes was earthquake data, the 10-minute 100 Hz data is If the maximum value of the vibration in the XY direction of the first floor 2a is equal to or greater than the threshold α ₂ , the 10-minute 100 Hz data is stored as earthquake data, assuming that the earthquake continues. .

Further, when the maximum value of the vibration in the XY direction of the first floor 2a in the 10-Hz 100 Hz data is equal to or greater than the threshold value α ₃ due to the earthquake vibration of the top 2d, it is said that the earthquake is after the earthquake. In the same manner, the 10-minute 100 Hz data is stored as earthquake data.

In addition to the above determination, this control program also determines whether or not a strong wind observation record is included at the same time when it is determined that an earthquake has occurred as a result of the above.
That is, as shown in FIG. 3, when 10 Hz data obtained by resampling 100 Hz data determined to be earthquake data, the maximum value of the top 2d is equal to or less than the threshold value α ₄ due to wind vibration. , Judgment that observation records due to strong winds are not included.

On the other hand, when the maximum value of the top 2d is equal to or greater than the threshold α ₄ , the maximum value of the top 2d of the 10 Hz data in the 10 minutes before the 10 minutes is further taken into account, which is the threshold α _4. If it is determined that a strong wind has occurred, it is determined that a strong wind has also occurred along with the earthquake, and the 10-Hz data for 10 minutes is stored in the storage medium 8 as wind data.

  As described above, according to the earthquake and wind observation system for the structure having the above-described structure, the vibration factor generated in the high-rise building 1 is increased only by the vibration sensors 3a to 3d without installing an anemometer. It can be judged that the earthquake or strong wind is accurate, and can be stored separately in the storage medium 8 as earthquake data or wind data. In addition, even when earthquakes and strong winds simultaneously act on the high-rise building 1 and vibrations are generated, they can be stored as earthquake data and wind data, respectively.

  In addition, since an anemometer is not required for observation of vibrations caused by strong winds, it is necessary to newly observe vibrations due to strong winds in existing buildings where only vibration sensors for earthquake observation are installed. Even in this case, it is possible to cope with the problem by simply changing the program incorporated in the PC 5, and the cost efficiency is excellent.

(Second Embodiment)
3 to 5 show a second embodiment of the earthquake and wind observation system in the structure of the present invention. The same components as those shown in FIGS. 1 to 3 are denoted by the same reference numerals. The explanation will be simplified.
As shown in FIG. 4, in this observation system, in order to observe the behavior of a high-rise building (structure) 1 during an earthquake or a strong wind, horizontal vibration is applied to the top (upper floor) 2d of the building 1. The vibration sensor 3d that detects the vibration and the vibration sensor 3e that detects vibration in the vertical direction are installed.

Next, based on FIG. 5 and FIG. 3, the structure of the said control program 11 is demonstrated with the effect | action.
First, as shown in FIG. 5, in this control program, the maximum value of the vibration in the vertical (Z) direction of the top 2d in the 100 Hz data (earthquake observation specification data) calculated by the program 9 is set in advance. When the vertical α (Z) direction threshold value α ₁ or more due to seismic motion at the top 2d is greater than or equal to the threshold α _1, it is determined that the vibration observed during the 10 minutes is caused by the earthquake, and the 100 Hz data is stored as earthquake data in the storage medium 8 Save to.

On the other hand, when the maximum value of the vibration in the Z direction of the top 2d in the 100 Hz data is less than the first threshold value α _1, it is determined whether or not the previous 10 minutes was earthquake data, If the 10 minutes are not earthquake data, a strong wind determination similar to that shown in FIG. 3 is performed. When the maximum value in the horizontal (XY) direction of the top 2d in the 10 Hz data (wind observation specification data) is equal to or greater than the threshold value α ₄ due to wind vibration, the vibration observed during the 10 minutes is It is determined that it is caused by the wind, and the 10 Hz data is stored in the storage medium 8 as wind data.

Similarly, also in this control program, as shown in FIG. 5, it is determined whether or not the previous 10 minutes was earthquake data. consideration to the maximum value of the vibration in the Z direction of the apex 2d is the case where the threshold value alpha ₂ or more, as the earthquake continues to store 100Hz data of the 10 minutes as the seismic data.

Furthermore, determines the maximum value of the vibration of the X-Y direction top 2d at 100Hz data of the 10 minutes, when it is above the threshold value alpha ₃ or by earthquakes vibration of the top portion 2d is a swing after the earthquake Similarly, the 10-Hz 100-Hz data is stored as earthquake data.

  In addition to the above determination, even in this control program, even if it is determined that an earthquake has occurred as a result of the above, as in the first embodiment shown in FIG. Whether or not is included.

  According to the earthquake and wind observation system having the above-described configuration, in addition to obtaining the same effects as those shown in the first embodiment, the horizontal direction and the vertical direction installed on the top 2d of the high-rise building 1 are also obtained. Only the direction vibration sensors 3d and 3e determine that the cause of the vibration generated in the high-rise building 1 is an earthquake or a strong wind with high accuracy, and separately store it in the storage medium 8 as earthquake data or wind data. Therefore, the system can be further simplified.

  In the above-described embodiment, the earthquake and wind observation system according to the present invention has been described only for the case where it is installed in the high-rise building 1. However, the present invention is not limited to this, The present invention can be similarly applied to various structures such as a skyscraper or a tower.

  It can be used to determine whether vibrations generated in structures such as high-rise buildings are caused by earthquakes or strong winds and accumulate them as observation data.

1 High-rise building (structure)
2a 1st floor (lower floor)
2d Top (upper floor)
3a-3e Vibration sensor 4 A / D converter 5 PC
6 Noise removal means 7 Resampling means 8 Storage medium 9 Earthquake specification data creation means 10 Wind specification data creation means 11 Control program (control means)

Claims (6)

A vibration sensor installed on the structure or ground, an A / D converter that converts the detection signal from the vibration sensor to digital data of earthquake observation specifications at the first sampling frequency, and conversion by this A / D converter Means for generating data of earthquake observation specifications for obtaining statistical values at regular intervals from the digital data of the vibration, and the digital data of the vibration converted by the A / D converter than the first sampling frequency. Re-sampling means to acquire at a low second sampling frequency, wind-specification data generating means to acquire statistical values at regular intervals from the vibration digital data generated by the resampling means, and these earthquake observations From the data of the specifications and wind observation specifications, determine whether the vibration observed by the vibration sensor is due to an earthquake or wind Te, and control means for each separately stored for as seismic data or wind data,
When the statistical value in the data of the earthquake observation specification is equal to or greater than a first threshold value due to the earthquake vibration set in advance, the vibration observed in the predetermined time is caused by an earthquake. And when the statistical value in the data of the wind observation specification is equal to or greater than a second threshold value due to wind vibration that is set in advance, it is observed at the predetermined time. A system for observing earthquakes and winds in structures, where it is determined that the vibrations are caused by wind.   2. The earthquake and wind observation system for a structure according to claim 1, wherein the resampling means includes noise removal means for eliminating high frequency noise. The upper vibration sensor installed on the upper floor including the top of the structure, and the lower vibration sensor installed on the lower floor of the structure including the ground,
The control means is observed at the predetermined time when the statistical value of the vibration of the lower floor in the data of the earthquake observation specification is equal to or higher than the first threshold value of the lower floor set in advance. And the statistical value of the upper floor in the data of the wind observation specification is less than the first threshold, and the statistical value of the upper floor in the data of the wind observation specifications is set in advance. 3. The earthquake and wind observation system for a structure according to claim 1, wherein, when the threshold value is equal to or greater than 2, the vibration observed during the predetermined time is determined to be caused by wind.   The control means, when it is determined that the vibration observed at a certain time before the certain time is caused by an earthquake, the lower layer in the data of the earthquake observation specifications observed at the certain time When the statistical value of the vibration of the floor is equal to or higher than the third threshold value due to the earthquake vibration of the lower floor which is smaller than the first threshold value set in advance, or the statistical value of the vibration of the upper floor is set in advance 4. The structure according to claim 3, wherein the vibration observed during the certain period of time is determined to be caused by the earthquake when it is greater than or equal to a fourth threshold value due to the earthquake vibration of the upper floor being used. 5. Earthquake and wind observation system for objects. A horizontal vibration sensor installed on an upper floor including the top of the structure, and a vertical vibration sensor;
And the control means has a case where the statistical value of the vertical vibration of the upper floor in the data of the earthquake observation specification is equal to or higher than the first threshold value in the vertical direction due to the earthquake of the upper floor set in advance. In addition, it is determined that the vibration observed in the certain time is caused by an earthquake, and the statistical value in the horizontal direction of the upper floor in the data of the wind observation specification that is less than the first threshold value is 3. The method according to claim 1, wherein the vibration observed during the predetermined time is determined to be caused by wind when the predetermined horizontal threshold value of the upper floor is equal to or greater than the second threshold value. Earthquake and wind observation system for structures described in 1.   The control means, when it is determined that the vibration observed at a certain time before the certain time is caused by an earthquake, the upper layer in the data of the earthquake observation specifications observed at the certain time When the statistical value of the vertical vibration of the floor is equal to or higher than a third threshold in the vertical direction due to the earthquake vibration of the upper floor that is smaller than the first threshold set in advance, or the horizontal direction of the upper floor If the statistical value of the vibration is equal to or higher than a preset fourth threshold value in the horizontal direction due to the earthquake vibration of the upper floor, it is determined that the vibration observed in the predetermined time is caused by the earthquake. The system for observing earthquakes and winds in a structure according to claim 5.

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