渤海海域典型场地土的动剪切模量比和阻尼比的统计值*
兰景岩1,刘化涤2,吕悦军1,谢卓娟1

(1.中国地震局 地壳应力研究所,北京 100085; 2.中交路桥技术有限公司,北京 100029)

海域土; 动剪切模量比; 阻尼比; 渤海海域

Statistical Value of Dynamic Shear Modulus Ratio and Damping Ratio of the Soils in Bohai Sea
LAN Jing-yan1,LIU Hua-di2,LU Yue-jun1,XIE Zhuo-juan1

(1.Institute of Crustal Dynamics,CEA,Beijing 100085,China)(2.CCCC Road and Bridge Consultants Co.,Ltd,Beijing 100029,China)

soil of sea; dynamic shear modulus; damping ratio; Bohai Sea

备注

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.