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在研究莫高窟地区地震地质条件及潜在地震危险性分析的基础上,基于地震的断层弹性位错理论,采用位移水平分布的抛物线模型,假定三危山断层分别发生5.5、6.0和6.5级地震情况下,用三维有限元的方法分析计算了莫高窟地区的潜在地震变形。给出了在震级5.5、6.0及6.5级三种情况断层逆冲和水平走滑两种活动方式下,莫高窟区的地震位移和应变值,供石窟的抗震设防加固设计参考。
Based on the analysis of seismic geological conditions and potential seismic risk in the Mogao Grottoes, based on the seismic elastic fault theory, a parabola model of displacement horizontal distribution is used. It is assumed that the 5.5, 6.0 and 6.5 earthquakes respectively occurred in the Sanwei Mountain fault In the case, the potential seismic deformation in the Mogao Grottoes area was analyzed and calculated by using the 3D finite element method. The earthquake displacements and strain values of Mogao Grottoes under the three kinds of fault truncation and horizontal strike-slip are given under the condition of magnitude 5.5, 6.0 and 6.5, which is a reference for the design of anti-seismic fortification of caves.