Development of sensor for measuring permanent displacement using servo-type velocity seismographs

开发使用伺服型速度地震仪测量永久位移的传感器

• 批准号: 08558038
• 负责人: SAWADA Sumio
• 金额: $ 4.1万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08558038/
• 关键词: servo-type velocity seismographs; liquefaction; permanent displacement,; ground flow; lifeline; buried pileline; 5イフライン; 地盤流動; サーボ速度計

The earthquake damages of the lifeline such as buried pipelines are caused mainly by deformation of ground that is accompanied with liquefaction or landslides. It is important that the deformation of ground can be measured to estimate total damage of lifeline system at the early stage of restoration. But the sensors of ground displacement or liquefaction are not arranged in this time.Recently many servo-type velocity seismographs are arranged. As the frequency range of a servo-type seismographs is very wide, from 0.02Hz to 70Hz, the seismographs may measure the permanent displacement of the ground from the component of the low frequency range.The purpose of this study is to develop new method to estimate permanent displacement of the ground in the effective precision using servo-type seismographsAt first the response of the seismographs is simulated against the ground motion which include permanent displacement. As the result it is understood that the permanent displacement can be estimated if the seismic signal in the long period component can be removed from the record. But the influence of declination of the instruments is found to be considerably large.The method for estimating long period signals is developed using phase characteristics in short period range of the record. Group delay time is adopted to represent phase characteristics of seismic motions. We proposed the stocastic impulse train model for representing source process. It is concluded that the long period signals can be estimated to some extent from the phase characteristics of a short period component of earthquake motion.

生命线的地震损害（例如埋入管道）主要是由伴有液化或滑坡的地面变形引起的。重要的是，可以测量地面的变形，以估计恢复早期生命线系统的总损害。但是，在这个时候，未安排地面位移或液化的传感器。由于伺服型地震仪的频率范围非常宽，从0.02Hz到70Hz，地震仪可以测量从低频范围的组成部分的地面的永久位移。本研究的目的是开发新方法到开发新方法使用伺服型地震仪以有效的精度估算地面的永久性位移，首先是对地震仪的响应进行模拟的，该响应是针对包括永久位移的地面运动的。结果，可以理解，如果可以从记录中删除长期组件中的地震信号，则可以估算永久性位移。但是，发现仪器偏斜的影响很大。估计长时间信号的方法是使用记录短期范围内的相特征开发的。采用组延迟时间来表示地震运动的相特征。我们提出了用于表示源过程的结构性冲动火车模型。结论是，可以从地震运动的短期成分的相特征中估算长期信号。

项目成果

Kenzo TOKI,Sumio SAWADA,Hitoshi MORIKAWA,Nobuhiro INUKAI: "Mesurement of Permanent Displacement of Ground using Servo-type Volocity Seismographs" Annual Meeting of Kansai branch of Japan Sosiety of Civil Engineers. I-36. (1997)

Kenzo TOKI、Sumio SAWADA、Hitoshi MORIKAWA、Nobuhiro INUKAI：“使用伺服型地震仪测量地面永久位移”日本土木工程师学会关西分会年会。

土岐憲三, 澤田純男, 盛川 仁, 犬飼信広: "サーボ型速度計による地盤の永久変位の測定" 平成9年度土木学会関西支部学術講演会講演概要集. 1-36. (1997)

Kenzo Toki、Sumio Sawada、Hitoshi Morikawa、Nobuhiro Inukai：“使用伺服速度计测量地面永久位移”1997 年日本土木工程师学会关西分会学术讲座摘要 1-36。

Kenzo TOKI,Sumio SAWADA,Hitoshi MORIKAWA,Nobuhiro INUKAI: "Feasibility Study on Mesurement of Permanent Displacement of Ground using Servo-type Velocity Seismographs" Annual Meeting of Japan Society for Natural Disaster Science. 81-82 (1997)

Kenzo TOKI、Sumio SAWADA、Hitoshi MORIKAWA、Nobuhiro INUKAI：“利用伺服型速度地震仪测量地面永久位移的可行性研究”日本自然灾害学会年会。

Sumio SAWADA,Hitoshi MORIKAWA,Kenzo TOKI,Keiju YOKOYAMA: "Identificationof Path and Local Site Effects on Phase Spectrum of Seismic Motion" Proc.of the 10th Japan Earthquake Engineering Symposium. Vol.1. 915-920 (1998)

Sumio SAWADA、Hitoshi MORIKAWA、Kenzo TOKI、Keiju YOKOYAMA：“Identification of Path and Local Site Effects on Seismic Motion Phase Spectrum”第 10 届日本地震工程研讨会论文集。

澤田純男・盛川仁・土岐憲三・横山圭樹: "地震動の位相スペクトルにおける伝播経路・サイト特性の分離" 第10回日本地震工学シンポジウム論文集. Vol.1. 915-920 (1998)

Sumio Sawada、Hitoshi Morikawa、Kenzo Toki、Keiki Yokoyama：“地震运动相位谱中的传播路径和场地特征的分离”第 10 届日本地震工程学会论文集 1. 915-920（1998）。