›› 2006, Vol. 27 ›› Issue (4): 543-548.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Numerical simulation analysis of mechanism of seismic deformation damage of country rock of grottoes

SHI Yu-cheng1, 2, FU Chang-hua 1, 2, WANG Lan-min1, 2   

  1. 1. Lanzhou Base of Institute of Earthquake Prediction, China Earthquake Administration, Lanzhou 730000, China; 2. Lanzhou Institute of Seismology, China Earthquake Administration, Lanzhou 730000, China
  • Received:2005-02-01 Online:2006-04-10 Published:2013-11-05

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Abstract: Considering characteristics of Grotto Relics, the influence factors and dynamic finite element analysis methods on deformation stability grotto country rock are discussed. Focusing on two sections of Mogao Grottoes in Dunhuang of Gansu Province, the dynamic response and variation regularity of rock mass and its adjuncts are revealed through numerical simulation of displacement and stress field under dynamic loads with different PGA, spectra and durations. The results indicate weak points for seismic retrofitting. It also shows that the displacement and stress increase, range of stress concentration expands and the damages probability of country rock increases with the increase of peak ground acceleration (PGA), characteristic period and duration of dynamic loads. The distribution of stress is closely related to the quantity, combination feature, geometry shape and size of caves. This paper provides theoretical basis and practical reference for the preservation of grotto relics and seismic retrofit and seismic hazard mitigation for the rock mass.

Key words: grotto, country rock, ground motion, finite element simulation, deformation mechanism

CLC Number: 

  • TU 435
  • Please send e-mail to pingzhou3@126.com if you would like to read full paper in English for free. Parts of our published papers have English translations.
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