VALIDATION STUDY OF GROUND MOTION MODEL THROUGH SIMULTANEOUS SIMULATION TEST AGAINST THE 1995 HYOGO-KEN NANBU EARTHQUAKE

1995年兵库县南部地震同步模拟试验地震动模型验证研究

• 批准号: 08650670
• 负责人: KAWANO Masahiro
• 金额: $ 1.6万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08650670/
• 关键词: Hyogo-ken Nanbu Earthquake; wave propagation theory; prediction of ground motion; simultaneous simulation test; one-dimensional surface soil sediment model; 設計用地震動モデル

The forward prediction model of ground motion integrating source, site and propagation characteristics has been developed using wave propagation theory and source kinematics. The refined model of wave propagation path from source to site is expressed as the multi-layred half-space which consists of a surface layr overlying a semi-infinite random medium. The source rupture process is expressed as the summation of the slip functions to subevents which develop in compliance with a degree of the random heterogeneity on the fault surface. The physical laws and key parameters have been presented to describe essentially the waveform, spectral characteristics, site amplification, the effective mechanism radiating short period waves, and the directivity of the source radiation. In this paper, the prediction potential of the ground motion model is examined through a simultaneous simulation test against the recorded seismograms of ground motion at sites KBU(Kobe University, the Committee of Earth … More quake Observation and Research in the Kansai area), KEN(Kansai Electric Power Co. Inc.), and MAT(Matsumura-gumi Technical Research Institute)during the Hyogo-Ken Nanbu earthquake of January 17,1995. They are strongly conditioned by not only the site amplification but also by the source dynamics because these sites are located just above the faulting region. The soil sediment structures and geological structures of basement crust for these sites were investigated by a seismic reflection survey, observed weak ground motions, PS logging and boring data. The geological profiles in and around Kobe City are fan-shaped, consisting of thick surface layr with a fault-like irregular boundary, dipping from north to south, and overlying basement bedrock^4. In this prediction test, the surface soil sediment and basement bedrock beneath each recording site in Kobe City are idealized by a multi-layred half-space overlying a semi-infinite random medium. The Green's functions from the discrete source points on the fault surface to each site are calculated precisely according to the geological data. Seliguchi et. al. estimated the slip vectors distribution to describe the source rupture process by solving the inverse problem for the observed ground motion. In this study, the prediction potential of the ground motion model is investigated through a simultaneous simulation test using the seismograms at the KBU,KEN,and MAT sites. The synthetic ground motion at the three sites are expressed by their Green's functions of the multi-layred half-space and the single source function which is described by slightly modifying the slip vectors distribution by Sekiguchi et. al.. The synthetic ground motions agree well with the observed ones at all the sites in the waveforms and response spectra. Less

利用波传播理论和震源运动学，建立了综合考虑震源、场地和传播特性的地震动正演预报模型。将震源到场地波传播路径的精化模型表示为覆盖半无限随机介质表面的多层半空间。震源破裂过程被表示为滑动函数对子事件的总和，这些滑动函数的发展符合断层表面一定程度的随机非均质性。给出了物理定律和关键参数，从本质上描述了源辐射的波形、光谱特性、站点放大、辐射短周期波的有效机制以及源辐射的方向性。本文通过对KBU(神户大学，地球…委员会)记录的地震动图进行同步模拟试验，检验了地震动模型的预测潜力1995年1月17日兵库县南部地震期间，关西电力公司(Kansai Electric Power Co.Inc.)、关西电力公司(Kansai Electric Power Co.)和松村组技术研究所(MaSumura-Gumi Technical Research Institute)的更多地震观测和研究。它们不仅受到场地放大的强烈制约，而且还受到震源动力学的强烈制约，因为这些场地正好位于断裂区的上方。通过地震反射测量、弱地面运动观测、PS测井和钻孔资料，研究了这些场地的土壤沉积结构和基底地壳地质结构。神户市及其周围的地质剖面呈扇形，由厚的表层组成，边界呈断层状，由北向南倾斜，上覆基底基岩。在这次预测试验中，神户市每个记录点下的表层土壤沉积物和基底基岩被理想化为覆盖在半无限随机介质上的多层半空间。根据地质资料，精确计算了从断裂面上的离散震源点到每个场地的格林函数。塞利古奇等人。艾尔通过对观测地震动反问题的求解，估计了描述震源破裂过程的滑移矢量分布。在这项研究中，通过使用KBU、KEN和MAT场地的地震记录进行同步模拟试验，研究了地震动模型的预测潜力。三个场地的合成地震动用其多层半空间格林函数和单源函数表示，其中单源函数由Sekiguchi等人对滑移矢量分布稍作修正来描述。阿尔..。在波形和反应谱上，所有场地的合成地震动与观测地震动吻合得很好。较少

项目成果

河野允宏、土肥博、松田敏: "関東地震(1923年)の地震動構成について" 日本建築学会大会学術梗概集. 243-244 (1996)

Masahiro Kono、Hiroshi Doi、Satoshi Matsuda：“关东地震的地震运动构成（1923 年）”日本建筑学会会议记录 243-244（1996 年）。

河野允宏: "兵庫県南部地震特別研究委員会、第1回公開シンポジウム 日本建築学会" 地盤と地震動、阪神淡路大震災から一年、-建築および都市の防災性向上へ向けて-, 4 (1996)

河野正博：“兵库县南部地震特别研究委员会，日本建筑学会第一届公共研讨会”地面和地震运动，阪神淡路大地震一年后 - 努力提高建筑和城市的防灾能力 -，4（1996 年） ) )

土肥 博、河野 允宏、松田 敏: "兵庫県南部地震における多点観測記録の同時シミュレーション(その2)" 日本建築学会大会学術講演梗慨集. (1997)257-258

Hiroshi Doi、Masahiro Kono、Satoshi Matsuda：《兵库县南部地震期间多点观测记录的同时模拟（第2部分）》日本建筑学会会议学术讲座摘要集（1997）257-258。

Kawano,M., M.Dohi and S.Matsuda: "A Study on Ground Motion for Seismic Design Based on Wave Propagation Theory and Source Dynamics" Proceedings of the 11th World Conference on Earthquake Engineering. No.716. (1996)

Kawano,M.、M.Dohi 和 S.Matsuda：“基于波传播理论和震源动力学的抗震设计地震动研究”第 11 届世界地震工程会议论文集。

河野允宏、土肥博、松田敏: "兵庫県南部地震における多点観測記録の同時シミュレーション" 日本建築学会大会学術梗概集. 195-1966 (1996)

Masahiro Kono、Hiroshi Doi、Satoshi Matsuda：“兵库县南部地震期间多点观测记录的同步模拟”日本建筑学会会议记录195-1966（1996）。