Study on Time-Space Variations of Earthquake Waves Considering Non-Uniformity of Ground Surface Conditions

考虑地表条件不均匀性的地震波时空变化研究

• 批准号: 17360209
• 负责人: KAWAKAMI Hideji
• 金额: $ 8.65万
• 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: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17360209/
• 关键词: ground motion; buried structure; earthquake; probabilistic process; seismometer array; interpolation; simulation; space-time wave field; 有限要素法; 大変形解析; 地震波動; 地震動; 時空間関数; アレー観測

The purpose of this study is to clarify the effects of the conditions of the ground surface on the earthquake ground motions. Irregular shaped ground, lots of trees and buildings, Which are existing ordinally at the ground surface, were considered in this study. Even if it has been pointed out previously that the ground with an irregular surface may cause complicated seismic responses, the process of generating this complex response has not yet been clarified. In this study, such a process was also examined.Regarding the effects of the irregular ground surface, for example, it has been pointed out that the ground with an irregular surface causes complicated seismic responses. However, the process of generating this complex response is not yet clarified. In this study, boundary element-perturbation method has been developed to investigate scattering of seismic waves due to an irregular surface. This method is based on the boundary element method in frequency domain and perturbation technique employing the Neumann series. By using this method, the ground response can be separated into those induced by incident waves and scattered waves. Numerical results showed that the amplitudes of the scattered waves are affected by both distance and direction of the irregular surface to the observation points.

这项研究的目的是阐明地表条件对地震地面运动的影响。研究中考虑了不规则形状的地面，大量树木和建筑物按顺序排列在地面上。即使之前已经指出，地表不规则的地面可能会引起复杂的地震反应，但这种复杂反应的产生过程尚未得到澄清。在这项研究中，也对这一过程进行了研究。例如，对于不规则地表的影响，指出了不规则地表引起的复杂地震反应。然而，产生这种复杂反应的过程尚不清楚。在这项研究中，发展了边界元-摄动法来研究不规则表面对地震波的散射。该方法以频域边界元方法为基础，采用Neumann级数摄动技术。利用这种方法，可以将地面反应分解为入射波和散射波引起的反应。数值结果表明，散射波的幅度受不规则表面到观测点的距离和方向的影响。

项目成果

Three-dimensional Seismic Damage Simulation of Wooden Houses Using Rigid Body-Spring Method

刚体-弹簧法木结构房屋三维震害模拟

• 发表时间: 2007
• 期刊: Earthquake Resistant Engineering Structures VI, WIT Press Vol. 93
• 作者: Kawakami;H.;Tingatinga;E. and Chang;H.Y.
• 通讯作者: H.Y.

An Innovative Strategy for Performance Assessment and Earthquake Retrofitting of Woodframed Buildings

木结构建筑性能评估和抗震改造的创新策略

• 发表时间: 2006
• 作者: Kawakami;H.;Tingatinga;E. and Chang;H.Y.,
• 通讯作者: H.Y.,

A Note on Spatial Variations inResponse Spectra of Earthquake Ground Motions

地震地面运动响应谱空间变化的注记

• 发表时间: 2007
• 期刊: ISET Journal of Earthquake Technology 44.1
• 作者: Kawakami H.;Mogi H. and Tingatinga E
• 通讯作者: Mogi H. and Tingatinga E

Analysis of Scattered Waves on Ground with Irregular Topography Using the Direct Boundary Element Method and Neumann Series Expansion

• DOI: 10.1785/0120060178
• 发表时间: 2007-08
• 期刊: Bulletin of the Seismological Society of America
• 影响因子: 3
• 作者: H. Mogi;H. Kawakami

Scattered Waves Induced by Irregular Topography

不规则地形引起的散射波

• 发表时间: 2006
• 期刊: 1st European Conference on Earthquake Engineering and Seismology P527B
• 作者: Mogi;H.;Kawakami;H.
• 通讯作者: H.