›› 2007, Vol. 28 ›› Issue (S1): 724-729.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

The pore pressure model and undrained shear strength of soft clay under cyclic loading

NIE Qing-ke1, BAI Bing2, HU Jian-min1, SHANG Wei-dong1   

  1. 1. Hebei Research Institute of Construction and Geotechnical Investigation Co. Ltd., Shijiazhuang 050031, China； 2. School of Civil and Architecture Engineering, Beijing Jiaotong University, Beijing 100044, China
  • Received:2007-03-24 Online:2007-10-25 Published:2014-03-28

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Abstract: The developments of pore pressure and axial deformation of undisturbed samples are studied by cyclic axial shear tests. A model for predicting the evolution of pore pressure under cyclic shear loading is proposed. The dynamic shear strength under undrained cyclic shear conditions is determined, and the degradation characteristics of undrained monotonic shear strength after cyclic loading are also analyzed. The effects of confining pressure and the frequency of cyclic loading on dynamic shear strength are studied. Studies show that, under a definite axial strain, the cyclic numbers decreases notably with the increase in cyclic stress ratio. Besides, the static undrained shear strength is degraded with the increase in cyclic stress ratio.

Key words: cyclic loading；deformation, pore pressure, cyclic stress ratio

CLC Number: 

  • TU473
  • Please send e-mail to pingzhou3@126.com if you would like to read full paper in English for free. Parts of our published papers have English translations.
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