渤海海域典型场地土的动剪切模量比和阻尼比的统计值

Statistical Value of Dynamic Shear Modulus Ratio and Damping Ratio of the Soils in Bohai Sea

收集渤海海域内近40个海洋平台的钻孔资料,结合室内振动三轴试验,归纳整理出372组渤海原状土样动力学测试的原始数据,利用数理统计方法给出渤海海域内不同类型土体、不同埋深的动剪切模量比和阻尼比随剪应变变化的平均曲线及统计值。研究结果可作为土动力学研究的补充,同时有利于加深对不同土质动力学性能的认识,为渤海海域内其它海洋建设工程的地震安全性评价工作提供借鉴和参考。

Collecting the borehole records of nearly 40 ocean-platforms in Bohai Sea and combining indoor dynamic triaxial test, we sorted out 372 original data tested by undisturbed soil sample dynamics of the Bohai Sea. By use of the mathematical statistics method, we obtained the average curves and statistical values of dynamic shear modulus and the damping ratios, both of them varied with the shear strain in different soil types and different depth in Bohai Sea. The results could be used as a supplement to the soil dynamics study, was helpful of deepening the understanding about dynamic property of different soil, and provided experience and reference for the seismic safety evaluation of other engineering construction projects in Bohai Sea.