JP5101326B2 - Real-time earthquake damage estimation method and apparatus due to viaduct shaking - Google Patents
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Description
本発明は、高架橋の揺れによるリアルタイム地震被害推定方法及びその装置に関するものである。 The present invention relates to a method and apparatus for estimating real-time earthquake damage due to shaking of a viaduct.
従来、構造物の地震被害推定については、下記特許文献１〜４に開示されるようなものがあった。
特に、下記特許文献２は、地表面に設置され地震動を観測する観測手段と、前記観測手段で観測した地震動データを収集して保存すると共に地震動データを分析処理し分析結果を表示する計算機とを有した地震被害予測システムにより、構造物の地震被害を推定する地震被害予測システムの被害推定方法において、地震動検知時に観測された地震動データを収集して保存し、構造物の固有振動数に対応したフィルタ条件で前記地震動データをフィルタ処理し、フィルタ処理した地震動データの最大値に基づいて前記構造物の被害状況を推定し、その被害推定結果を管理者に通知するようにしている。
Conventionally, there has been a technique disclosed in
In particular, the following
一方、従来の高架橋の地震被害推定方法は、各地に設置されている地震計による情報に頼らざるを得ず、高架橋に対応したリアルタイムでの適切な地震被害推定が行われていないのが現状である。
そこで、本発明は、構造物一般の被害推定を更に発展させて構成が簡単でしかもリアルタイムで、地震による高架橋への被害を推定することができる高架橋の地震被害推定方法を確立することにある。
本発明は、上記状況に鑑みて、高架橋に対応して構成が簡単で、かつ適切な地震被害推定を行うことができる高架橋の揺れによるリアルタイム地震被害推定方法及びその装置を提供することを目的とする。
Therefore, the present invention aims to establish an earthquake damage estimation method for a viaduct capable of estimating damage to a viaduct due to an earthquake in real time by further developing damage estimation for a general structure.
In view of the above circumstances, an object of the present invention is to provide a real-time earthquake damage estimation method and apparatus therefor, which is simple in structure corresponding to a viaduct and can perform an appropriate earthquake damage estimation due to a viaduct swing. To do.
本発明は、上記目的を達成するために、
〔１〕高架橋の揺れによるリアルタイム地震被害推定方法において、高架橋の上部に配置される地震計と、この地震計に接続され、地上に配置される地震被害推定器とを備え、前記地震計からの情報に基づいて前記地震被害推定器において、前記高架橋の揺れによる地震被害をリアルタイムで推定する高架橋の揺れによるリアルタイム地震被害推定方法であって、前記地震計からの情報は、橋軸直角方向／橋軸方向スペクトル比のピークの周波数であり、過去の無被害地震発生時に対する地震発生時の橋軸直角方向／橋軸方向スペクトル比のピークの周波数の比率が所定の値以下である場合には、前記高架橋に地震被害が発生したと推定することを特徴とする。
In order to achieve the above object, the present invention provides
[1] In the real-time earthquake damage estimation method according shaking viaduct, a seismometer which is placed on top of the viaduct, is connected to the seismograph, a earthquake damage estimator arranged on the ground, from the seismographs In the earthquake damage estimator based on information, a real-time earthquake damage estimation method by a viaduct swing that estimates the earthquake damage due to the viaduct swing in real time, the information from the seismometer is in a direction perpendicular to the bridge axis / bridge When the ratio of the peak frequency of the axial spectrum ratio is equal to or less than a predetermined value when the ratio of the peak frequency of the bridge axis perpendicular direction direction / bridge axis direction spectral ratio at the time of the earthquake occurrence to the past occurrence of an undamaged earthquake, It is estimated that earthquake damage has occurred in the viaduct .
〔２〕上記〔１〕記載の高架橋の揺れによるリアルタイム地震被害推定方法において、前記所定の値が０超過１．０未満であることを特徴とする。
〔３〕高架橋の揺れによるリアルタイム地震被害推定装置において、高架橋の上部に配置される地震計と、この地震計に接続され、前記地震計からの情報に基づいて前記高架橋の地震被害をリアルタイムで推定する地震被害推定器とを具備する高架橋の揺れによるリアルタイム地震被害推定装置であって、前記地震被害推定器は、前記地震計から得られる橋軸直角方向／橋軸方向スペクトル比のピークの周波数を取得するとともに、過去の無被害地震発生時に対する地震発生時の橋軸直角方向／橋軸方向スペクトル比のピークの周波数の比率が所定の値以下である場合には、前記高架橋に地震被害が発生したと推定することを特徴とする。
[ 2 ] In the real-time earthquake damage estimation method according to the viaduct swing described in [ 1 ], the predetermined value is more than 0 and less than 1.0.
[ 3 ] In a real-time earthquake damage estimation device due to viaduct shaking, a seismometer located above the viaduct and connected to this seismometer, estimates the earthquake damage of the viaduct in real time based on information from the seismometer A seismic damage estimator for real-time seismic damage estimation due to viaduct shaking, wherein the seismic damage estimator calculates a peak frequency of a bridge axis perpendicular direction / bridge axis direction spectrum ratio obtained from the seismometer. If the ratio of the peak frequency of the bridge axis perpendicular direction / bridge axis direction spectrum ratio at the time of the earthquake occurrence to the past when there was an undamaged earthquake is less than the predetermined value, earthquake damage will occur on the viaduct It is presumed that it was done.
〔４〕上記〔３〕記載の高架橋の揺れによるリアルタイム地震被害推定装置において、前記所定の値が０超過１．０未満であることを特徴とする。 [ 4 ] In the real-time earthquake damage estimation apparatus according to the flyover swing described in [3], the predetermined value is more than 0 and less than 1.0 .
本発明によれば、次のような効果を奏することができる。
（１）高架橋の上部に配置される地震計のみで、橋軸方向に対する橋軸直角方向の揺れの特性を簡単な構成で処理し、リアルタイムで高架橋の地震被害を推定することができる。
（２）強震時における被害発生の有無を推定することができる。特に、強震による高架橋の非線形化を活用するようにしている。
According to the present invention, the following effects can be achieved.
(1) By using only a seismometer placed at the top of the viaduct, the vibration characteristics in the direction perpendicular to the bridge axis with respect to the bridge axis direction can be processed with a simple configuration, and the earthquake damage of the viaduct can be estimated in real time.
(2) It is possible to estimate the occurrence of damage during a strong earthquake. In particular, the use of non-linearization of viaducts due to strong earthquakes is utilized.
（３）被害発生の閾値を明確にすることができる。
（４）また、各地の高架橋の地震被害推定を地震情報通信基地局において収集することにより、高架橋を含む地域的な被害の状況をリアルタイムで推定し、地震被害の広がりをも把握することができる。
(3) The threshold for occurrence of damage can be clarified.
(4) In addition, by collecting earthquake damage estimates of viaducts in various locations at the earthquake information and communication base station, it is possible to estimate the state of local damage including viaducts in real time and grasp the extent of earthquake damage. .
本発明の高架橋の揺れによるリアルタイム地震被害推定方法は、高架橋の上部に配置される地震計と、この地震計に接続され、地上に配置される地震被害推定器とを備え、前記地震計からの情報に基づいて前記地震被害推定器において、前記高架橋の揺れによる地震被害をリアルタイムで推定する高架橋の揺れによるリアルタイム地震被害推定方法であって、前記地震計からの情報は、橋軸直角方向／橋軸方向スペクトル比のピークの周波数であり、過去の無被害地震発生時に対する地震発生時の橋軸直角方向／橋軸方向スペクトル比のピークの周波数の比率が所定の値以下である場合には、前記高架橋に地震被害が発生したと推定する。 Real-time earthquake damage estimation method according shaking viaduct of the present invention includes a seismometer which is placed on top of the viaduct, is connected to the seismograph, a earthquake damage estimator arranged on the ground, from the seismographs In the earthquake damage estimator based on information, a real-time earthquake damage estimation method by a viaduct swing that estimates the earthquake damage due to the viaduct swing in real time, the information from the seismometer is in a direction perpendicular to the bridge axis / bridge When the ratio of the peak frequency of the axial spectrum ratio is equal to or less than a predetermined value when the ratio of the peak frequency of the bridge axis perpendicular direction direction / bridge axis direction spectral ratio at the time of the earthquake occurrence to the past occurrence of an undamaged earthquake, It is estimated that earthquake damage occurred on the viaduct .
以下、本発明の実施の形態について詳細に説明する。
図１は本発明の実施例を示す地震計の設置の状況を示す模式図である。
これらの図において、１は高架橋（ラーメン高架橋）、２は橋脚、３は橋脚２の上部に設けられる地震計、４は地上に設置され前記地震計３に接続される地震被害推定器であり、この地震被害推定器４には情報通信装置（図示なし）が内蔵されており、地震情報通信基地局へ高架橋の揺れによる地震被害の推定情報の通信をリアルタイムにて行うことができる。
Hereinafter, embodiments of the present invention will be described in detail.
FIG. 1 is a schematic diagram showing a state of installation of a seismometer showing an embodiment of the present invention.
In these drawings, 1 is a viaduct (ramen viaduct), 2 is a bridge pier, 3 is a seismometer installed on the upper part of the
図２は本発明の実施例を示す高架橋の揺れによるリアルタイム地震被害推定方法を示すフローチャートである。
（１）無被害地震発生時において、地震計３からの情報に基づいて地震被害推定器４により橋軸直角方向／橋軸方向スペクトル比のピークの周波数Ａを取得し、記録する（ステップＳ１）。
FIG. 2 is a flowchart showing a method for estimating real-time earthquake damage due to shaking of a viaduct according to an embodiment of the present invention.
(1) When an undamaged earthquake occurs, the
（２）地震発生時に、橋軸直角方向／橋軸方向スペクトル比のピークの周波数Ａを取得する（ステップＳ２）。
（３）次に、上記ステップＳ２で得た地震発生時の橋軸直角方向／橋軸方向スペクトル比のピークの周波数Ａが、上記ステップＳ１で記録された過去の無被害地震発生時のそれに対して比率として０超過１．０未満であるか否かを地震被害推定器４で判別する（ステップＳ３）。
(2) When the earthquake occurs, the peak frequency A of the bridge axis perpendicular direction / bridge axis direction spectrum ratio is acquired (step S2).
(3) Next, the frequency A of the peak of the bridge axis perpendicular / bridge axis direction spectral ratio during earthquake obtained in the above step S2 is that of the time of the recorded past undamaged earthquakes that in the
（４）ステップＳ３における判別結果がＹＥＳであれば、地震被害が発生したと推定する（ステップＳ４）。また、ステップＳ３における判別結果がＮＯであれば、地震被害は発生していないと推定する（ステップＳ５）。
図３は本発明にかかる地震観測地点Ｘにおける周波数（Ｈｚ）を横軸とした橋軸直角方向／橋軸方向スペクトル比を示す図、図４は本発明にかかる地震観測地点Ｙにおける周波数（Ｈｚ）を横軸とした橋軸直角方向／橋軸方向スペクトル比を示す図である。
(4) If the determination result in step S3 is YES, it is estimated that earthquake damage has occurred (step S4). If the determination result in step S3 is NO, it is estimated that no earthquake damage has occurred (step S5).
FIG. 3 is a diagram showing the bridge axis perpendicular direction / bridge axis direction spectrum ratio with the frequency (Hz) at the seismic observation point X according to the present invention as the horizontal axis, and FIG. 4 shows the frequency (Hz) at the seismic observation point Y according to the present invention. It is a figure which shows the bridge-axis perpendicular direction / bridge-axis direction spectrum ratio which made a horizontal axis | shaft a horizontal axis.
図３から明らかなように、地震観測地点Ｘでは、過去の無被害地震発生時に対する地震発生時の橋軸直角方向／橋軸方向スペクトル比のピークの周波数Ａの比率が０超過１．０未満になっている。
一方、図４に示すように、地震観測地点Ｙでは、過去の無被害地震発生時に対する地震発生時の橋軸直角方向／橋軸方向スペクトル比のピークの周波数Ａの比率が１．０未満になっていない。
As is clear from FIG. 3, at the earthquake observation point X, the ratio of the peak frequency A in the bridge axis perpendicular direction / bridge axis direction spectrum ratio at the time of the earthquake occurrence to the past occurrence of the undamaged earthquake is greater than 0 and less than 1.0. It has become.
On the other hand, as shown in FIG. 4, at the earthquake observation point Y, the ratio of the peak frequency A of the bridge axis perpendicular direction / bridge axis direction spectrum ratio at the time of the earthquake occurrence to less than 1.0 at the time of the earthquake occurrence with respect to the past occurrence of the damage-free earthquake occurred. is not.
したがって、地震観測地点Ｘにおいては、高架橋に地震被害が発生しており、地震観測地点Ｙにおいては高架橋に地震被害が発生していないと推定される。
なお、本発明は上記実施例に限定されるものではなく、本発明の趣旨に基づき種々の変形が可能であり、これらを本発明の範囲から排除するものではない。
Therefore, at the earthquake observation point X, it is estimated that there is an earthquake damage on the viaduct, and at the earthquake observation point Y, there is no earthquake damage on the viaduct.
In addition, this invention is not limited to the said Example, Based on the meaning of this invention, a various deformation | transformation is possible and these are not excluded from the scope of the present invention.
本発明の高架橋の揺れによるリアルタイム地震被害推定方法及びその装置は、高架橋の地震被害推定を簡単な構成で行うツールとして利用可能である。 The real-time earthquake damage estimation method and apparatus according to the present invention can be utilized as a tool for estimating earthquake damage of a viaduct with a simple configuration.
１ 高架橋
２ 橋脚
３ 地震計
４ 地震被害推定器
1 Viaduct 2 Pier 3 Seismometer 4 Earthquake damage estimator
Claims (4)
高架橋の上部に配置される地震計と、該地震計に接続され、地上に配置される地震被害推定器とを備え、前記地震計からの情報に基づいて前記地震被害推定器において、前記高架橋の揺れによる地震被害をリアルタイムで推定する高架橋の揺れによるリアルタイム地震被害推定方法であって、前記地震計からの情報は、橋軸直角方向／橋軸方向スペクトル比のピークの周波数であり、過去の無被害地震発生時に対する地震発生時の橋軸直角方向／橋軸方向スペクトル比のピークの周波数の比率が所定の値以下である場合には、前記高架橋に地震被害が発生したと推定することを特徴とする高架橋の揺れによるリアルタイム地震被害推定方法。 In the real-time earthquake damage estimation method due to the shaking of the viaduct,
A seismometer which is placed on top of the viaduct, is connected to the seismograph, a earthquake damage estimator arranged on the ground, in the earthquake damage estimator based on information from the seismograph, the viaduct This is a real- time earthquake damage estimation method by shaking of a viaduct that estimates earthquake damage due to shaking in real time, and the information from the seismometer is the peak frequency of the bridge axis perpendicular direction / bridge axis direction spectral ratio, When the ratio of the peak frequency of the bridge axis perpendicular direction / bridge axis direction spectrum ratio at the time of earthquake occurrence to the damage earthquake occurrence is less than a predetermined value, it is estimated that earthquake damage has occurred on the viaduct Real-time earthquake damage estimation method due to shaking of the viaduct.
（ａ）高架橋の上部に配置される地震計と、
（ｂ）該地震計に接続され、前記地震計からの情報に基づいて前記高架橋の地震被害をリアルタイムで推定する地震被害推定器とを具備する高架橋の揺れによるリアルタイム地震被害推定装置であって、
（ｃ）前記地震被害推定器は、前記地震計から得られる橋軸直角方向／橋軸方向スペクトル比のピークの周波数を取得するとともに、過去の無被害地震発生時に対する地震発生時の橋軸直角方向／橋軸方向スペクトル比のピークの周波数の比率が所定の値以下である場合には、前記高架橋に地震被害が発生したと推定することを特徴とする高架橋の揺れによるリアルタイム地震被害推定装置。 In the real-time earthquake damage estimation device due to the shaking of the viaduct,
(A) a seismometer placed at the top of the viaduct;
(B) a real-time earthquake damage estimation device by shaking of a viaduct comprising an earthquake damage estimator connected to the seismometer , and estimating an earthquake damage of the viaduct in real time based on information from the seismometer ,
(C) The seismic damage estimator obtains the peak frequency of the bridge axis perpendicular direction / bridge axis direction spectrum ratio obtained from the seismometer, and the bridge axis right angle at the time of occurrence of the earthquake with respect to the past occurrence of an undamaged earthquake. A real-time earthquake damage estimation apparatus for shaking of a viaduct characterized by estimating that an earthquake damage has occurred in the viaduct when a ratio of peak frequencies in a direction / bridge axis direction spectral ratio is a predetermined value or less .
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