【摘要】 通过对南京地区某大型地下工程场地原状淤泥质粉质粘土和粉质粘土开展共振柱试验,研究了两类土动剪切模量与阻尼比随剪应变和固结围压的变化规律,结合双曲线模型,给出了淤泥质粉质粘土和粉质粘土动剪切模量比和阻尼比随剪应变变化的平均曲线及其动参数的典型值,并与前人的研究成果进行了对比分析,表明该研究成果可为南京地区建筑工程项目地震安全性评价提供一定的借鉴和参考。更多还原

【Abstract】 By the resonant column test on the mucky silty clay soil and silty clay soil in a large underground engineering of Nanjing,the variation laws of dynamic shear modulus and damping ratio with dynamic shear strain and load are found.Combining with the hyperbolic model,the fitting curves based on the average relation of the dynamic shear modulus ratio and damping ratio with shear strain amplitude as well as their typical values for two clay soils as mentioned above are presented.By comparing the results of the paper with previous studies,it is indicated that the results could provide some reference for the seismic safety evaluation of the construction projects in Nanjing.更多还原