›› 2009, Vol. 30 ›› Issue (1): 113-117.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Attenuation characters of Rayleigh wave in layered soils

HUANG Mao-song1, 2, REN Qing1, 2, ZHOU Ren-yi3, HUANG Shao-min4   

  1. 1. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China; 2. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China; 3. Nanhui Construction Administration, Shanghai 201300, China; 4. Shanghai Architectural Design & Research Institute, Shanghai 200041, China
  • Received:2007-06-14 Online:2009-01-10 Published:2011-01-14

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Abstract:

Attenuation characters of Rayleigh wave in layered soils are key factors for environmental micro-vibration control and analysis. Transfer-matrix is used to calculate dispersion curve of Rayleigh wave in layered soils. A thorough discussion is done on Rayleigh wave attenuation characters in different kinds of layered soils (upper-soft-and-lower-hard, middle-soft and middle-hard layered soil) under different vibration frequency; and some conclusions are drawn as follows: (1) Attenuation characters of Rayleigh wave in layered soils are influenced by vibration frequency and profile of layered soils; (2) Higher vibration frequency, faster attenuation; (3) The existence of special soils (soft soil or hard soil) can locally change the Rayleigh wave attenuation characters; (4) Location and amplitude of displacement is governed by vibration frequency and profile of layered soils. Finally, this approach is applied for calculating attenuation characters of SSRF site; and results have a good agreement with field test data. It is convinced that, comparing with attenuation curve in elastic half space, attenuation curve in layered soils can more reasonably simulate propagation of Rayleigh wave in layered soils.

Key words: layered soils, Rayleigh wave, dispersion curve, environmental vibration

CLC Number: 

  • TU 435
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