›› 2010, Vol. 31 ›› Issue (12): 3901-3906.

• Geotechnical Engineering • Previous Articles     Next Articles

Spectrum characteristics analysis of seismic response for underground caverns via wavelet packet

CUI Zhen1, SHENG Qian1, LIU Jia-jin2, LENG Xian-lun1   

  1. 1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 2. HydroChina Huadong Engineering Corporation, Hangzhou 310014, China
  • Received:2010-09-03 Online:2010-12-10 Published:2010-12-21

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Abstract:

Based on proper damping parameters, a finite difference numerical simulation is conducted for the seismic analysis of the Baihetan underground caverns. Wavelet packet analysis is made for the evaluation of wave propagation and spectrum characteristics of seismic response from the point of view of peak acceleration and vibration energy. Results indicate that seismic intensity increases with the elevation and fault zones possess vibration-suppressing effect. Spectrum characteristics of seismic response can be clearly revealed by wavelet packet. High-frequency components of seismic wave are gradually absorbed during propagation. A major influential frequency band of peak acceleration and vibration energy spectrum characteristics is obtained as 1-3Hz for wall rock, and other bands have minor effects.

Key words: underground caverns, wavelet packet, seismic response, spectrum characteristics, Rayleigh damping

CLC Number: 

  • TU 435
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