福州地区典型土动剪切模量与阻尼比的试验研究

通过对福州地区淤泥、淤泥质土、粉质黏土、粉质黏土与粉砂互层土、粉砂、残积土等6类典型土的共振柱试验,详细探讨了围压大小、土的性质对这6类典型土的动剪切模量G及阻尼比γ的影响。通过试验和理论分析,给出了福州地区6类典型土在不同围压下的G/Gmax和λ/λmax随γ变化的平均曲线及其参数的推荐值,并定量地给出围压对这6类典型土G/Gmax和λ/λmax随γ变化的平均曲线的参数的影响规律,对实际工程具有一定的借鉴作用。

Testing study of dynamic shear modulus and damping ratio of typical soils in Fuzhou area

Through the resonant column test on such 6 sorts of typical soils such as mud, muddy soil, silty caly, silty clay and silty sand interbedded strata, silt and residual soil, the influences of confining pressure and soil property on dynamic shear modulus G and damping ratio ? of the 6 typical soils have been explored in detail. By means of tests and theoretical analyses, the average curves of G/Gmax and ? /?max with the change of ? under different confining pressures as well as their recommended values of parameters for the 6 sorts of typical soils in Fuzhou area are presented. Besides, the influence patterns of the average curve parameters for G/Gmax and ? /?max of such 6 soils with the change of ? are also quantified. The above findings would be used as reference for practical projects.