JP3764943B2 - Seismic motion risk monitoring method - Google Patents
Seismic motion risk monitoring method Download PDFInfo
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- JP3764943B2 JP3764943B2 JP13313299A JP13313299A JP3764943B2 JP 3764943 B2 JP3764943 B2 JP 3764943B2 JP 13313299 A JP13313299 A JP 13313299A JP 13313299 A JP13313299 A JP 13313299A JP 3764943 B2 JP3764943 B2 JP 3764943B2
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- 238000000034 method Methods 0.000 title claims description 13
- 238000012544 monitoring process Methods 0.000 title claims description 11
- 239000013598 vector Substances 0.000 claims description 19
- 230000001133 acceleration Effects 0.000 claims description 14
- 238000006073 displacement reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 1
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Description
【０００１】
【発明の属する技術分野】
本発明は地震動を観測し、その加害性を的確に判断するための、地震動の危険度モニタリング手法に関する。本発明は地震動の持つ発災強度を物理的にとらえた指標を算出し、実際に被害が生じるような閾値と比較することで地震の危険度を判定するための手法を提供するもので、この手法を警報地震計や地震動早期検知装置に用いることで、実際の被害と関連づけた誤警報の少ない的確な地震警報を発令することができる。
【０００２】
【従来の技術】
地震警報を目的とした地震動モニタリングに用いられている従来の指標には、加速度、速度、変位、ＳＩ値、震度、計測震度など様々な指標がある。
【０００３】
これらの指標のうち、例えば、加速度、速度、変位、ＳＩ値はリアルタイムに計測することができる指標ではあるが、地震動による被害と物理的な関係を、少なくともこれらの指標から単独では明確に見いだすことができないという問題がある。
【０００４】
また、震度、計測震度については、実際の地震動による被害との関連をある程度ふまえて定められているが、この場合も物理的な関係が明確ではないのみならず、指標をリアルタイムに算出することができず、地震動が収束したあとでないと指標の値を知ることができないという問題もある。
【０００５】
【発明が解決しようとする課題】
本発明が解決しようとする課題は、地震警報を発令するための指標が、地震動による被害との物理的な関係が明らかでないことである。
【０００６】
また、地震警報を発令するための指標によっては、指標の算出がリアルタイムに行うことができず、地震警報の発令が地震収束後になることである。
【０００７】
【課題を解決するための手段】
（第１の手段）本発明に係わる地震動の危険度モニタリング手法は、地震動を常時観測し、観測している地震動の作用している物体について、作用している地震動による応答加速度ベクトルと、作用している地震動による応答速度ベクトルとを観測した各サンプルごとに算出する。算出された応答加速度ベクトルと応答速度ベクトルとの内積をリアルタイムに算出し、その値が一定の値を超えたことにより、作用している地震動が危険であると判断する。したがって次のように作用する。
【０００８】
地震動が作用する物体の質量に、物体に作用する応答速度と物体に作用する応答加速度とを掛け合わせることにより、単位時間内に地震動が作用する物体に及ぼす仕事量を算出することができる。この仕事量が大きくなれば地震動の作用する物体に被害が生じ、さらに仕事量が大きくなることで被害の程度も大きくなることが理解される。
【０００９】
以上は地震動の作用する物体についての検討であるが、前述した仕事量を地震動の作用する物体の質量で除することにより、すなわち、地震動の作用している物体について、作用している地震動による応答加速度ベクトルと応答速度ベクトルとの内積を算出することで、地震動の危険度モニタリング指標とすることができる。
応答加速度ベクトルと応答速度ベクトルとの内積についてはリアルタイムに算出することができるため、この数値が過去の地震被害等から算定することができる一定の閾値を超えたことで、観測している地震が被害を及ぼすことをリアルタイムに判断することができる。
【００１０】
【発明の実施の形態】
（第１の実施の形態）本発明に係わる第１の実施の形態を図１に示す。図１は、第１の実施の形態に係わる演算処理流れ図を示す。
【００１１】
地震動を観測するために加速度計や速度計、変位計などの振動センサを用いる。観測するのは加速度と速度であるが、これらの数値は、加速度、速度、変位のうち、少なくとも一つが観測されていることで、その観測値を適宜積分あるいは微分することで求める方法もある。
さらに、地震観測は水平方向成分、鉛直方向成分についてそれぞれ行うことを原則とするが、被害を及ぼすような地震動の場合は、地震動の鉛直方向成分は水平方向成分に比べて小さいため、特に警報発令を目的とするような場合は、水平方向成分のみの観測でも本発明を実現することができる。
【００１２】
この観測している地震動について応答加速度ベクトルと応答速度ベクトルとを算出する。さらに算出された応答加速度ベクトルと応答速度ベクトルとの内積を算出する。算出された内積の値が閾値を超えたことで、観測している地震が危険であると判断することができる。または観測している地震が危険であると判断し、警報を発令することができる。
【００１３】
この判断は観測している地震動の各サンプリングごとに行うことができるため、リアルタイムに地震の危険度を判定することができる。また、リアルタイムに地震警報を発令することができる。
【００１４】
【発明の効果】
本発明は前述のように構成されているので、観測している地震動の加害性を、被害と関連した指標を用いることで、リアルタイムに判定することができる。またこの判定結果を用いることで、的確かつ迅速な地震警報を提供するという効果がある。
【図面の簡単な説明】
【図１】 本発明の第１の実施の形態に係わる演算処理流れ図[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a seismic motion risk monitoring method for observing seismic motion and accurately judging the harm. The present invention provides a method for determining an earthquake risk by calculating an index that physically captures the intensity of earthquake motion, and comparing it with a threshold that causes actual damage. By using this method for alarm seismometers and early earthquake motion detectors, it is possible to issue accurate earthquake warnings with few false alarms associated with actual damage.
[0002]
[Prior art]
There are various indexes such as acceleration, velocity, displacement, SI value, seismic intensity, and measured seismic intensity as conventional indices used for seismic motion monitoring for the purpose of earthquake warning.
[0003]
Among these indicators, for example, acceleration, velocity, displacement, and SI values are indicators that can be measured in real time. However, the damage and the physical relationship from earthquake motion should be clearly found at least independently from these indicators. There is a problem that can not be.
[0004]
In addition, the seismic intensity and measured seismic intensity are determined based on the relationship with the damage caused by the actual ground motion to some extent, but in this case as well, the physical relationship is not clear and the indicators can be calculated in real time. There is also a problem that the index value can only be known after the earthquake motion has converged.
[0005]
[Problems to be solved by the invention]
The problem to be solved by the present invention is that the index for issuing an earthquake warning is not clearly related to the damage caused by earthquake motion.
[0006]
Also, depending on the index for issuing an earthquake warning, the calculation of the index cannot be performed in real time, and the earthquake warning is issued after the earthquake has converged.
[0007]
[Means for Solving the Problems]
(First Means) The seismic motion risk monitoring method according to the present invention is a method of constantly observing seismic motion and acting on a response acceleration vector due to the acting seismic motion for an object on which the seismic motion is acting. The response speed vector due to the seismic motion is calculated for each observed sample. The inner product of the calculated response acceleration vector and response speed vector is calculated in real time, and when the value exceeds a certain value, it is determined that the acting earthquake motion is dangerous. Therefore, it operates as follows.
[0008]
By multiplying the mass of the object on which the seismic motion acts by the response speed acting on the object and the response acceleration acting on the object, the amount of work exerted on the object on which the seismic motion acts can be calculated within a unit time. It is understood that if this work amount is increased, the object affected by the earthquake motion is damaged, and further, the work amount is increased and the degree of damage is increased.
[0009]
The above is the examination of the object that acts on the ground motion. By dividing the above-mentioned work by the mass of the body that acts on the ground motion, that is, the response on the body that acts on the ground motion. By calculating the inner product of the acceleration vector and the response speed vector, it can be used as a seismic motion risk monitoring index.
Since the inner product of the response acceleration vector and the response speed vector can be calculated in real time, this numerical value exceeds a certain threshold that can be calculated from past earthquake damage, etc. It is possible to judge in real time that it will cause damage.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
(First Embodiment) FIG. 1 shows a first embodiment according to the present invention. FIG. 1 shows a flowchart of arithmetic processing according to the first embodiment.
[0011]
Vibration sensors such as accelerometers, speedometers, and displacement meters are used to observe earthquake motion. Although the acceleration and velocity are observed, there is a method in which these numerical values are obtained by appropriately integrating or differentiating the observed values as at least one of acceleration, velocity and displacement is observed.
Furthermore, in principle, seismic observations are performed for the horizontal component and vertical component, respectively. However, in the case of seismic motion that causes damage, the vertical component of seismic motion is smaller than the horizontal component. For the purpose of the above, the present invention can be realized even by observing only the horizontal component.
[0012]
A response acceleration vector and a response speed vector are calculated for the observed earthquake motion. Further, the inner product of the calculated response acceleration vector and response speed vector is calculated. When the calculated inner product value exceeds the threshold value, it can be determined that the observed earthquake is dangerous. Or, it can be judged that the observed earthquake is dangerous and an alarm can be issued.
[0013]
Since this determination can be made for each sampling of the observed ground motion, the earthquake risk can be determined in real time. In addition, an earthquake warning can be issued in real time.
[0014]
【The invention's effect】
Since the present invention is configured as described above, it is possible to determine in real time the harmfulness of the observed ground motion by using an index related to the damage. Also, by using this determination result, there is an effect of providing an accurate and quick earthquake warning.
[Brief description of the drawings]
FIG. 1 is a flowchart of arithmetic processing according to a first embodiment of the present invention.
Claims (3)
地震動を常時観測し、
観測している地震動の作用している物体について、
作用している地震動による応答加速度ベクトルと、作用している地震動による応答速度ベクトルと、を各観測したサンプルごとに算出し、
算出された応答加速度ベクトルと、算出された応答速度ベクトルと、の内積をリアルタイムに算出し、
算出された内積が一定の値を超えたことにより、
作用している地震動が危険であると判断する、
ことを特徴とする、地震動の危険度モニタリング手法。In the seismic motion risk monitoring method,
Always observe earthquake motion,
For the objects that are observing the seismic motion,
The response acceleration vector due to the acting ground motion and the response speed vector due to the acting ground motion are calculated for each observed sample,
Calculate the inner product of the calculated response acceleration vector and the calculated response speed vector in real time,
When the calculated inner product exceeds a certain value,
Judging that the seismic motion acting is dangerous,
This is a seismic motion risk monitoring method.
作用している地震動による応答加速度ベクトルと、作用している地震動による応答速度ベクトルと、を観測した各サンプルごとに算出する際に、
水平方向成分のみについてベクトルを算出する、
ことを特徴とする、請求項１に記載の、地震動の危険度モニタリング手法。In the method for monitoring the risk of seismic motion according to claim 1,
When calculating the response acceleration vector due to the acting ground motion and the response speed vector due to the acting ground motion for each observed sample,
Calculate vectors for only the horizontal component,
The seismic motion risk monitoring method according to claim 1, wherein:
算出された内積が一定の値を超えたことにより、
作用している地震動に関する警報を発令する、
ことを特徴とする、
請求項１に記載の地震動の危険度モニタリング手法。In the seismic motion risk monitoring method according to claim 1,
When the calculated inner product exceeds a certain value,
Annunciating warnings about the seismic motion that is acting,
It is characterized by
The seismic motion risk monitoring method according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13313299A JP3764943B2 (en) | 1999-04-05 | 1999-04-05 | Seismic motion risk monitoring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13313299A JP3764943B2 (en) | 1999-04-05 | 1999-04-05 | Seismic motion risk monitoring method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000292547A JP2000292547A (en) | 2000-10-20 |
| JP3764943B2 true JP3764943B2 (en) | 2006-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13313299A Expired - Lifetime JP3764943B2 (en) | 1999-04-05 | 1999-04-05 | Seismic motion risk monitoring method |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4348441B2 (en) | 2007-01-22 | 2009-10-21 | 国立大学法人 大阪教育大学 | Position detection apparatus, position detection method, data determination apparatus, data determination method, computer program, and storage medium |
| KR101502062B1 (en) * | 2013-11-01 | 2015-03-11 | 한국기술교육대학교 산학협력단 | Earthquake Sensing Method and Seismometer using the same |
| CN104360377B (en) * | 2014-10-16 | 2018-03-06 | 中国地震局工程力学研究所 | A kind of structure and the monitoring of slope seismic response and speed report instrument |
| CN110059401B (en) * | 2019-04-15 | 2022-10-25 | 青岛科技大学 | OFDM system underwater sound channel impulse response reconstruction method |
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