期刊
GEOTECHNICAL AND GEOLOGICAL ENGINEERING
卷 35, 期 5, 页码 2479-2483出版社
SPRINGER
DOI: 10.1007/s10706-017-0244-6
关键词
Small-strain damping; Free vibration test method; Resonant column test method; Davidenkov model; Minimum damping ratio
Small-strain damping is a key factor of soil behavior under cyclic loading: although the value of small-strain damping is such small that would not compete with damping at larger strains (that would have a more significant impact in dynamic response analyses), repeated energy consumption of the small-strain damping would bring potential abrupt structural failure of soil. However, the measurement methods and fitting models of small-strain damping vary in the accuracy and applicable scope. In this paper, the measurement of SHANTOU remolded saturated soft clay was made for small-strain damping by resonant column apparatus, using both resonant column test method and free vibration test method. On the basis of the experimental data, this paper made a comparison between the two methods and found out the free vibration test method was more favorable for damping measurement at small strains(10(-4)% < gamma < 10(-1)%). Based on Davidenkov model, a modified model with the consideration of minimum damping ratio was presented for SHANTOU remolded saturated soft clay in this paper.
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