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Volume 35 Issue 3
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CAO Yong, KONG Ling-wei, YANG Ai-wu. Waveform effect of cyclic loading of dynamic character and stiffness degradation characteristics of marine deposited natural soft clay[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(3): 583-589.
Citation: CAO Yong, KONG Ling-wei, YANG Ai-wu. Waveform effect of cyclic loading of dynamic character and stiffness degradation characteristics of marine deposited natural soft clay[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(3): 583-589.
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Waveform effect of cyclic loading of dynamic character and stiffness degradation characteristics of marine deposited natural soft clay

  • 1. Institute of Rock and Soil Mechanics, Chinese Academy of Sciences State Key Laboratory of Geomechanics and Geotechnical Engineering, Wuhan 430071, China; 2. Department of Civil Engineering, Tianjin Institute of Urban Construction, Tianjin 300384, China

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  • Received Date: May 24, 2012
  • Published Date: March 24, 2013
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    • Abstract
  • Dynamic characteristics of natural soft clay under long-term cyclic loading have been widely studied. However, the previous researches focued on the dynamic characteristics under only one kind of cyclic loading waveform. Different kinds of exterior cyclic loading affect the natural soft clay subgrade, such as earthquakes, high buildings, high speed rails, wave loads, oil tanks, reservoirs and so on, and they demonstrate different wave patterns. Stress-controlled dynamic triaxial tests are performed under the square, triangle, sine cyclic loading, and considering the effects of cyclic numbers, dynamic amplitudes, and frequencies, the dynamic characteristics of natural soft clay are studied and analyzed, and the dynamic characteristics under different cyclic loading waveforms are compared. For comparing the stiffness degradation of soft clay under different cyclic loading waveforms, degradation index defined by cyclic shear modulus is used to analyze the stiffness degradation process.
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