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Volume 25 Issue 4
Aug.  2012
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Journal of Southwest Jiaotong University  > 2012  >  25(4): 573-579.
SUN Bo, PENG Ningbo, WANG Fengrui. Seismic Dynamic Responses of No.19 Grotto's West Side Cave of Yungang Grottoes[J]. Journal of Southwest Jiaotong University, 2012, 25(4): 573-579. doi: 10.3969/j.issn.0258-2724.2012.04.006
Citation: SUN Bo, PENG Ningbo, WANG Fengrui. Seismic Dynamic Responses of No.19 Grotto's West Side Cave of Yungang Grottoes[J]. Journal of Southwest Jiaotong University, 2012, 25(4): 573-579. doi: 10.3969/j.issn.0258-2724.2012.04.006
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Seismic Dynamic Responses of No.19 Grotto's West Side Cave of Yungang Grottoes

doi: 10.3969/j.issn.0258-2724.2012.04.006
  • Received Date: 22 Dec 2011
  • Publish Date: 25 Aug 2012
    Abstract
  • A three-dimensional entity model for the 19th grotto's west side cave of Yungang Grottoes was built in order to explore the seismic dynamic responses of grottoes. A finite difference software, FLAC3D, was used to numerically simulate the displacement, acceleration amplification factor, stress distribution and acceleration Fourier spectrum of its chamber and surrounding rock. The simulation results show that its external cliff has a trend of outward collapse, and the main failure mode of rock mass is shear failure. Seismic waves are reflected and superimposed on each other in the region near the chamber, and large energy is absorbed by rock mass, so earthquake acceleration in the region should be augmented in antiseismic strengthening design.

     

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