Bu Yifan. Comparison Research on the Normalized Dynamic Shear Modulus and Damping Ratio by Resonant Column and Cyclic Triaxial Tests[J]. 2021, (2): 343-349.
Bu Yifan. Comparison Research on the Normalized Dynamic Shear Modulus and Damping Ratio by Resonant Column and Cyclic Triaxial Tests[J]. 2021, (2): 343-349.DOI:
Comparison Research on the Normalized Dynamic Shear Modulus and Damping Ratio by Resonant Column and Cyclic Triaxial Tests
One of the key issues in the deformation behavior of soil is the measurement of dynamic shear modulus and damping ratio. In order to fundamentally understand the measurement of dynamic shear modulus and damping ratio,using the resonant column apparatus and the cyclic loading triaxial testing system made by GCTS,the resonant column and cyclic triaxial tests on the variation characteristics of the normalized shear modulus(G/Gmax)and damping ratio(λ)with increasing shear strain (γ)were performed. It revealed that the variation trends of G/Gmax and λ with increasing γ obtained from resonant column tests were consistent with those obtained through cyclic triaxial tests,and the consistency was independent of the depth and soil type. Moreover,the two test methods can be combined to obtain the G/Gmax and λ of soil with a strain range of 10?6 to 10?2,which can provide reasonable curves of the G/Gmax and λ for nonlinear analysis on seismic site response of major projects.
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