›› 2007, Vol. 28 ›› Issue (10): 2065-2070.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Effect of sediment model on dynamic pressure in overlying ideal fluid due to P wave incidence

WANG Jin-ting, ZHANG Chu-han, JIN Feng   

  1. Department of Hydraulic and Hydropower Engineering, Tsinghua University, Beijing 100084, China
  • Received:2005-10-11 Online:2007-10-10 Published:2013-10-15

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Abstract: Through the analytical solutions, the effects of saturated and unsaturated sediment on the dynamic pressures in the overlying ideal fluid due to P wave incidence from underlying elastic half-space are investigated. The sediment is modeled respectively as elastic solid, viscoelastic solid, ideal fluid and viscous fluid. The results obtained are compared with the case in which sediment was viewed as a two-phase poroelastic media. It is concluded that the two-phase poroelastic media can be simplified approximately as a viscoelastic or even as linear elastic solid when its permeability is relatively small (k≤10-3m/s). The findings are useful for construction a sediment model in dynamic analysis of dam-reservoir-sediment-foundation system to enhance the efficiency of the numerical procedures.

Key words: elastic half-space, sediment layer, ideal fluid, P wave, dynamic response

CLC Number: 

  • TU 435
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