山东东营地区土的动剪切模量比和阻尼比试验研究*

(山东省地震工程研究院,山东 济南 250021)

动剪切模量比; 阻尼比; 山东东营

Experimental Study on Dynamic Shear Modules and Damping Ratio of Soils at Dongying Area in Shandong
WANG Jin-jin,ZHANG Jian-min,GUO Ting-ting,YANG Chuan-cheng,CAI Wen-xia

(Shandong Institute of Earthquake Engineering,Jinan 250021,Shandong,China)

dynamic shear modulus; damping ratio; Dongying area

备注

对山东东营地区埋深3.0~57.3 m的土层划分标准层,对采集的42组粘土、粉质粘土、粉土(中密)、粉质粘土与粉砂互层土样进行动三轴试验,通过统计分析给出了这些样品动剪切模量比和阻尼比随剪应变变化试验结果,并与袁晓铭等(2000)给出推荐值进行了对比分析。结果 表明,东营地区各类岩土的试验结果值在该地区具有一定的代表性和适用性,并在该地区地震安全性评价工作中得到了应用。

The standard floors are divided for the soil whose buried depth is from 3.0 m to 57.0 m at Dongying area in Shandong. According to statistical analysis of the dynamic triaxial test on the selected 42 groups of clay,silty clay,silt(medium density),silty clay and silty sand interbedded strata,the test results of dynamic shear modulus and damping ratio variation with shear strain of the samples are given. Besides,the differences between test value and recommended value from Yuan et al(2000)are compared and analyzed. The results show that the experiment value of the various soils has representativeness and practicability at Dongying area in Shandong,which has been applied in the seismic safety evaluation in Dongying downtown area.