›› 2010, Vol. 31 ›› Issue (5): 1437-1444.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Research on consolidation pressure correlated dynamic properties model of clay and its application

LIU Fang-cheng1, SHANG Shou-ping2, WANG Hai-dong2   

  1. 1. College of Civil Engineering, Hunan University of Technology, Zhuzhou 412008, China; 2. College of Civil Engineering, Hunan University, Changsha 410082, China
  • Received:2008-08-20 Online:2010-05-10 Published:2010-05-24

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Abstract:

Cyclic simple shear tests are conducted on a silty clay with different axial consolidation pressures; and nonlinear dynamic property curves, vs. curve and D vs. curve, of soil under different test consolidation pressures, where , and D are dynamic shear modulus, dynamic shear strain radio and damping ratio respectively, are obtained. Results indicate that even normalized dynamic property curves of soil under different consolidation pressures exhibit differences. Along with the build up of consolidation pressure, the degradation of curve slows down; and the increase of curve delays. Based on the experimental relationship between maximum dynamic shear modulus, maximum damping ratio, reference shear strain and the consolidation pressure separately, a novel consolidation pressure correlated dynamic property curve model of clay is proposed. Application of the consolidation pressure correlated model for site response is carried out. Results indicate that the property of soil dynamics varid with the consolidation pressure will affect not only the magnitude but also the frequency spectrum properties of the site response, and the thicker of overlay, the more obvious of the affects.

Key words: consolidation pressure, soil dynamic properties, nonlinearity, silty clay, cyclic simple shear test

CLC Number: 

  • TU 411.8
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