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Development and systematization of analytical methods for seismometer array records and expansion of seismometer array on campus

地震仪阵列记录分析方法的开发和系统化以及校园地震仪阵列的扩展

基本信息

批准号：
10450171
负责人：
KAWAKAMI Hideji
金额：
$ 4.48万
依托单位：
SAITAMA UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B).
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 2000
项目状态：
已结题

项目摘要

The objectives of this study are (1) development of analytical methods for the records of seismometer array and their engineering application ; (2) investigation of the spatial characteristics of ground motions ; and (3) provision of space-time ground motions for earthquake resistant design.(1.a) Development of Analytical Methods for the Records of Seismometer ArraysNew methods both in time domain and frequency domain have been developed to investigate the phenomena of wave propagation. The methods have been examined from the viewpoints of precision and numerical stability. Then, the methods have been demonstrated by using observation records, and the nonliear wave propagation in soft soil has been discussed. These results were published in the proceedings of the 11th European Conference on Earthquake Engineering and Soil Dynamics and Earthquake Engineering.(1.b) Spatial variation of Peak Ground AccelerationIntra-event spatial variations have been investigated by using the records of seismometer arrays. The findings of this research were summarized in the proceedings of the JSCE.(2) Investigation of Spatial Characteristics of Ground MotionsSeismometer array installed at Saitama University has been expanded. The records of this system and other published records have been analyzed to examine the spatial claracteristics of ground motions such as the speed of horizontal wave propagation and coherence value.(3) Provision of Space-time Ground Motions for Earthquake Resistant DesignThe methods to predict space-time ground motions have been examined and improved for a more accurate representation of the actual wave propagation. A new method has also been developed based on the interpolation of observed records. The numerical stability of this method has been closely investigated for the engineers who are not specialized in waveform analyses.

本研究的目的是：（1）发展地震计台阵记录的分析方法及其工程应用;（2）研究地震动的空间特性;（3）为抗震设计提供时空地震动。(1.a)地震台阵记录分析方法的发展研究波传播现象的时域和频域的新方法已经发展起来。从精度和数值稳定性的角度对这些方法进行了检验。然后用实测资料对方法进行了论证，并对非线性波在软土中的传播进行了讨论。这些结果发表在第11届欧洲地震工程和土壤动力学与地震工程会议上。(1.b)峰值加速度的空间变化本文利用地震台阵的记录研究了事件内的空间变化。这项研究的结果摘要载于联合专家委员会会议记录。(2)地面运动的空间特征研究安装在琦玉大学的地震计阵列已经扩大。通过分析该系统的记录和其他已发表的记录，研究了地震动的空间特征，如水平波传播速度和相干值。(3)为抗震设计提供时空地面运动预测时空地面运动的方法已被检查和改进，以更准确地表示实际波的传播。本文还提出了一种基于观测记录插值的新方法。对于非波形分析专业的工程师来说，这种方法的数值稳定性已经得到了密切的研究。