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既存の強震計に装着できる液状化センサーの開発
https://doi.org/10.24517/00049464
https://doi.org/10.24517/00049464bb3980bc-70d1-4436-ab1c-15f1fb73c301
名前 / ファイル | ライセンス | アクション |
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TE-PR-MIYAJIMA-M-kaken 2001B-6p.pdf (320.7 kB)
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Item type | 報告書 / Research Paper(1) | |||||
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公開日 | 2017-12-22 | |||||
タイトル | ||||||
タイトル | 既存の強震計に装着できる液状化センサーの開発 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Development of Liquefaction Detective Sensor Installing with Strong Ground Motion Accerelometer | |||||
言語 | ||||||
言語 | jpn | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_18ws | |||||
資源タイプ | research report | |||||
ID登録 | ||||||
ID登録 | 10.24517/00049464 | |||||
ID登録タイプ | JaLC | |||||
著者 |
宮島, 昌克
× 宮島, 昌克 |
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著者別表示 |
Miyajima, Masakatsu
× Miyajima, Masakatsu |
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提供者所属 | ||||||
内容記述タイプ | Other | |||||
内容記述 | 金沢大学工学部 | |||||
書誌情報 |
平成12(2000)年度 科学研究費補助金 基盤研究(B) 研究成果報告書 en : 2000 Fiscal Year Final Research Report 巻 1999-2000, p. 6p., 発行日 2001-03 |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | これまでに本研究グループによって提案されている強震記録を用いた液状化判定指標を整理し,各指標の精度とそれぞれを組み合わせた場合の精度について検討を行い,総合的な液状化判定指標を作成した.これらを我が国で得られた100地点の強震記録に適用したところ,液状化地盤と非液状化地盤を明確に判別できることが明らかとなった.つぎに,液状化判定がリアルタイムに行えるように,液状化判定指標の算出方法を改良した.すなわち,地震発生直後から強震記録を逐次計算することにより,液状化の発生と同時に検知情報を発信できるように検知指標を改良した.これについても100地点の強震記録を用いて検証を行った.その結果,検知精度を下げることなく,従来の指標よりも数十秒早く,液状化の検知情報を発信できることが明らかとなった. つぎに,1999年台湾・集集地震,2000年鳥取県西部地震の強震記録を新たに収集し,液状化検知法の精度についてさらに検討した.台湾・集集地震においては断層変位が地表面に現れたことから,断層運動に伴う長周期化が強震記録に見られ,これを液状化による長周期化と区別しなければならないという新たな問題点が明らかになった.また,鳥取県西部地震においては,ボーリングデータを用いた解析により明らかに液状化が発生したと考えられる地点において,地表面に噴砂・噴水などの顕著な液状化痕跡が現れなくても強震記録から液状化を検知することができた.さらに,強震記録に反映される液状化の情報が鉛直,水平方向にどのような範囲まで有効なのかについて,鳥取県西部地震における強震記録をもとに検討を行った. |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | The present study is focusing on the monitoring of ground motion in order to detect liquefaction. The importance of monitoring system was recognized in the lifeline earthquake engineering after the 1995 Hyogoken Nambu earthquake in Japan. The monitoring system in the lifeline earthquake engineering is classified into two aspects. One is the monitoring of lifeline facilities and the other is the monitoring of ground motion and ground failure. The present study is focusing on the monitoring of the ground motion in order to detect liquefaction. The study tries to use the strong ground motion records for detection of liquefaction. First, amplitude characteristics of strong ground motion records were investigated. Time histories of ratio of vertical ground acceleration to the horizontal one was calculated from response acceleration records at ground surface in liquefied and non-liquefied areas. If the ratio of vertical ground acceleration to the horizontal one is calculated at each time step, the ratio is remarkably great when the horizontal ground acceleration is close to zero instantaneously. Therefore, the ratio was calculated from the maximum accelerations for every 0.3 seconds in order to avoid the instantaneous great value. Next, frequency characteristics of the response acceleration records were studied. The average predominant frequency of the strong motion and decrease rate of the predominant frequency was calculated. Finally these indices were verified by using more than one hundred response acceleration records at ground surface including the 1999 Ji-Ji Earthquake in Taiwan and 2000 Tottoriken Seibu Earthquake. |
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内容記述 | ||||||
内容記述タイプ | Other | |||||
内容記述 | 研究課題/領域番号:11555122, 研究期間(年度):1999-2000 | |||||
内容記述 | ||||||
内容記述タイプ | Other | |||||
内容記述 | 出典:「既存の強震計に装着できる液状化センサーの開発」研究成果報告書 課題番号11555122 (KAKEN:科学研究費助成事業データベース(国立情報学研究所)) 本文データは著者版報告書より作成 |
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著者版フラグ | ||||||
出版タイプ | AM | |||||
出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||
関連URI | ||||||
識別子タイプ | URI | |||||
関連識別子 | https://kaken.nii.ac.jp/search/?qm=70143881 | |||||
関連名称 | https://kaken.nii.ac.jp/search/?qm=70143881 | |||||
関連URI | ||||||
識別子タイプ | URI | |||||
関連識別子 | https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11555122/ | |||||
関連名称 | https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11555122/ | |||||
関連URI | ||||||
識別子タイプ | URI | |||||
関連識別子 | https://kaken.nii.ac.jp/report/KAKENHI-PROJECT-11555122/115551222000kenkyu_seika_hokoku_gaiyo/ | |||||
関連名称 | https://kaken.nii.ac.jp/report/KAKENHI-PROJECT-11555122/115551222000kenkyu_seika_hokoku_gaiyo/ |