Numerical and Theoretical Studies on the Mechanical Destabilization of Planes of Weakness, Dynamic Rupture Propagation and Wave Radiation

薄弱面机械失稳、动态断裂传播和波辐射的数值和理论研究

• 批准号: 19760326
• 负责人: UENISHI Koji
• 金额: $ 2.37万
• 依托单位: Kobe University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2007
• 资助国家: 日本
• 起止时间: 2007 至 2009
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-19760326/
• 关键词: 不連続面のすべり; 地震のモデル; 斜面崩壊; トンネル崩落; 界面不安定現象; 変分法; 非線形すべり弱化則; 異種材料間不連続面

In this research project, a theoretical study on the fracture mechanics of planes of weakness has been promoted. For example, the dynamic fracture propagation on a plane of weakness located between materials with extremely different physical properties has been considered in light of rupture propagation speed. The effect of waves, generated by fracture of planes of weakness, on the surrounding environment, the ground and structures has been quantitatively evaluated. As a concrete instance, the dynamic slope failure generated by the 1978 Miyagi-ken-oki, Japan, earthquake in the residential area of Sendai City has been studied. It has been pointed out that such slope failure may be possibly induced not only by the universal mechanical characteristics of seismic waves but also by the local seismological (tectonic) conditions under the Tohoku region of Japan.

在本研究项目中，推动了软弱面断裂力学的理论研究。例如，考虑了断裂扩展速度的影响，考虑了在物理性质迥异的材料之间的弱面上的动态断裂扩展。定量评价了软弱面破裂产生的海浪对周围环境、地面和建筑物的影响。作为具体实例，研究了1978年日本宫城大地震对仙台市居民区斜坡的动态破坏。指出这种边坡的破坏可能既有地震波的普遍力学特征，也有日本东北地区的局部地震(构造)条件。

项目成果

The Cuna Problem - Reconsidered.

库纳问题——重新考虑。

• 发表时间: 2008
• 期刊: Geomechanics in the Emerging Social and Technological Age
• 作者: Rossmanith;H.P.;K. Uenishi
• 通讯作者: K. Uenishi

The Role of High Frequencies in Earthquake-Induced Failures of Underground Structures.

高频在地震引起的地下结构破坏中的作用。

• 发表时间: 2007
• 期刊: Proceedings of the ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering
• 作者: Uenishi;K.
• 通讯作者: K.

On the Mechanical Properties of a Dual Tunnel Subjected to a Vertical Disturbance.

垂直扰动下双隧道的力学特性。

• 发表时间: 2007
• 期刊: Report of the Research Center for Urban Safety and Security(Kobe University) 11
• 作者: Uenishi;K.;K. Tsuji
• 通讯作者: K. Tsuji

Dynamic Rupture of an Interface between Two Extremely Dissimilar Media

两种极其不同的介质之间界面的动态断裂

• 发表时间: 2007
• 作者: Uenishi;K.;K. Tsuji
• 通讯作者: K. Tsuji

On a Possible Role of Rayleigh Surface Waves in Dynamic Slope Failures

• DOI: 10.1061/(asce)gm.1943-5622.0000057
• 发表时间: 2010-01
• 期刊: International Journal of Geomechanics
• 影响因子: 3.7
• 作者: K. Uenishi