›› 2013, Vol. 34 ›› Issue (11): 3145-3150.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Nonlinear characteristics and determinate method of elastic stiffness for soils due to low-amplitude small-strain vibrations

JIA Peng-fei1, 2，KONG Ling-wei1，WANG Yong1，YANG Ai-wu1   

  1. 1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 2. State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi’an 710069, China
  • Received:2012-02-20 Online:2013-11-09 Published:2013-11-11

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Abstract: Railway track and nearby structures in the vicinity of high-speed railway are exposed to low-amplitude small-strain vibrations as high-speed railway traffic construction activities arise. In the finite element (FE) method, how to determine the stiffness tensor E is important to build a rational predicting model to analyze the settlement of track and nearby structures in the vicinity of high-speed railway. Shear modulus G and damping ratio D which will vary with shear strain amplitude are two important stiffness and damping parameters. It is found through resonant column test study that the shear modulus G of soil due to vibrations must be determined by the strain amplitude and the confining pressure, even though under small-strain (shear strain amplitude 10-6

Key words: two-parameter Davidenkov model, resonant/free-vibration column test, shear modulus, damping ratio

CLC Number: 

  • TU 435
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