study on mitigation of damage to structures due to earthquake faults

断层位移通过地下层由于基底断层运动的传播进行了检查。数值分析显示了剪切带的三维形貌。从亚表层应力和土颗粒结构两个方面分析了剪切带的形成过程和机理。野岛断层的数值模拟结果与观测结果基本一致。结果表明，有一种可能性，由于断层位移对结构的损害是减轻使用大晶粒尺寸的材料。

Propagation of fault displacement through subsurface layer due to basement-fault movement was examined. 3D morphology of shear bands was shown by numerical analysis. The process and the mechanism of the development of shear bands were analyzed in terms of stress inside the subsurface layer and the soil particle structure. The numerical simulation result of Nojima fault showed resemblance to the results of observations. It was shown that there is a possibility that the damage to structures due to fault displacement is mitigated by using materials of large grain size.