Influence of a cyclic and dynamic loading history on dynamic properties of dry sand, part I: cyclic and dynamic torsional prestraining |
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| Authors: | T Wichtmann Th Triantafyllidis |
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| Institution: | Institute of Soil Mechanics and Foundation Engineering, Ruhr-University Bochum, Universitätsstrasse 150, 44801, Bochum, Germany |
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| Abstract: | Initial fabric of a soil induced by its cyclic strain history is an important parameter together with the void ratio, state of stress and amplitude in respect to further accumulation of deformations under drained cyclic loading. It is of importance for the further deformation prediction to determine the initial fabric of the grain skeleton or the cyclic loading history of the soil. An attempt is made within this paper to correlate small strain stiffness of non-cohesive soil with its cyclic loading history. The results of performed cyclic and dynamic torsional tests show that small strain shear modulus is only moderately affected by cyclic prestraining even if high amplitudes are applied. A signature of prestraining history is observed in the tests since the sand memorizes its prestraining amplitude and the number of applied cycles. |
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| Keywords: | Resonant column tests Dynamic soil properties Small strain stiffness Shear modulus Damping ratio Fabric Cyclic prestraining Dynamic prestraining Memory of sand |
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