摘要
运用数理统计方法研究广西区内189个红粘土样品自振柱试验成果,发现广西红粘土动剪切模量比中应变范围(5×10^(-4)~1×10^(-3))变易性大,阻尼比变异性无明显规律;在R软件中,运用Davidenkov模型对试验数据进行非线性拟合,对比统计数据表明拟合效果好,可作为广西红粘土动力非线性参数推荐值;同国内公开发表的粘性土动剪切模量比和阻尼比推荐值进行对比分析,表明广西红粘土具有动剪切模量比处于中等水平而阻尼比整体偏小的特征。
The paper studies the free resonance vibration column test results of 189 Guangxi laterite samples by mathematical statistic methods. The results show that the variation of dynamic shear modulus ratio of Guangxi laterite in the middle strain range（5×10^（-4）~1×10^（-3）） is great with no law in damping ratio variability; in R software, the paper fits the experimental data in nonlinear way by using the Davidenkov model, and statistical data show good fitting effect, which an be used as recommended values for the dynamic nonlinear parameter of Guangxi laterite; it was indicated that the dynamic shear modulus ratio of Guangxi laterite was at middle level and the damping ratio of Guangxi laterite was smaller by comparing with the recommended value of cohesive soils in published articles.
出处
《华南地震》
2016年第2期77-83,共7页
South China Journal of Seismology
基金
广西壮族自治区地震局科研项目"广西红粘土动力非线性特征研究"(2014008)
关键词
统计分析
红粘土
动剪切模量比
阻尼比
动力非线性
Statistical analysis
Laterite
Dynamic shear modulus ratio
Damping
Dynamic nonlinear
