›› 2011, Vol. 32 ›› Issue (1): 244-252.

• Numerical Analysis • Previous Articles     Next Articles

Diffraction of plane P waves around a local fault

LIANG Jian-wen，FENG Ling-xiang，BA Zhen-ning   

  1. Department of Civil Engineering, Tianjin University, Tianjin 300072, China
  • Received:2009-05-06 Online:2011-01-10 Published:2011-01-19

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Abstract:

Diffraction of plane P waves around a local fault is presented in frequency domain using IBEM，in which, the dynamic stiffness matrix and Green’s function for distributed loads acting on inclined line by Wolf are used. The paper discusses emphatically the dynamic response to the surrounding rock of the narrow fracture zone and the effect of the dynamic characteristics of layered site on the diffraction. It is shown that a local fault has great effect on wave diffraction. Even if the local fault is very narrow, significant amplification may appear. The dynamic characteristics of layered site also play an important role in the wave amplification.

Key words: local fault, fracture zone, plane P wave, diffraction, indirect boundary element method, dynamic stiffness matrix, Green’s function

CLC Number: 

  • TU 443
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