›› 2010, Vol. 31 ›› Issue (5): 1457-1462.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Effect of consolidation ratio of cohesive soils on dynamic shear modulus

SUN Jing1, YUAN Xiao-ming2   

  1. 1. Institute of Civil Engineering, Heilongjiang University, Harbin 150086, China; 2. Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, China
  • Received:2008-09-19 Online:2010-05-10 Published:2010-05-24

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Abstract:

By using the resonant column device tests, the effect of the consolidation ratio on the maximum dynamic shear modulus (DSM) and the DSM versus the shear strain for two types of soils were investigated. The effect of the DSM versus the shear strain under different consolidation ratios on spectrum of surface ground motion was evaluated by the soil layer response calculation. An incremental formula for calculating the maximum DSM for the cases of the anisotropic consolidation was presented. The new formula indicates that the increasing degree of the maximum DSM due to kc>1.0 is significantly larger than that predicted by Hardin and Black’s formula. Compared with sand, the increment of the maximum DSM due to anisotropic consolidation is much larger than that of sand. Also, the effect of the consolidation ratios on DSM versus the shear strain and surface ground motion was demonstrated. The results indicate the DSM versus the shear strain increases with increasing of the consolidation ratios and the effects of the consolidation ratio on DSM versus the shear strain should be considered for the incidence of the strong earthquake.

Key words: consolidation ratio, dynamic shear modulus, cohesive soil, resonant column tests, response spectrum

CLC Number: 

  • TU 441
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