Experimental Study on Dynamic Shear Modulus Ratio and Damping Ratio of Recently Deposited Soils in the Lower Reaches of the Yangtze River

Dynamic experimental study on a total of 275 soil samples has been conducted with free vibration column apparatus. These samples are recently deposited soils, which include mucky silty clay, clay, silty clay, silty clay and silty sand interbedded strata, silt, fine sand and coarse sand, taken from cities of Nanjing, Suzhou, Changzhou, Xuzhou, Taizhou, Yancheng, Yangzhou, Wuxi, Zhenjiang, Zhangjiagang, Lianyungang, Qidong, Changshu, Jiangyin and Suqian in the area of the lower reaches of the Yangtze River. The envelopes, fitting curves and recommended values of dynamic shear modulus ratio G/G (max) or / and damping ratio λ versus shear strain amplitude γ for 7 types of soils are also presented. Since there is no similar study in this respect, this study may be of significance to understand dynamic characteristics of recently deposited soils in this area. Moreover, the experimental results can provide a reference for seismic safety evaluation of engineering sites in this area.