等幅循环荷载作用下土的动剪模量和阻尼

本文根据我国南方8个场址81个试样的动三轴试验资料，对土在等幅循环荷载作用下，其动模量和阻尼与应变幅值的关系进行了分析研究，并与现场测试结果进行对比，分析结果，本文提出一种广义双曲线模型，能更满意地描述各类寺应力应变关系，该模型保持了形式简便，参数物理意义明确等优点，文中还分别对砂土和粘土，给出了模型中参数的统计关系式，这些表达式能明显的映粘性土和非粘性土的特性及其差别。

DYNAMIC MODULUS AND DAMPING OF SOIL UNDER CYCLIC LOADING WITH EQUAL AMPLITUDES

Analytical study of the relationship between dynamic modu-lus, damping and strain amplitude of soil under cyclic loading of equal amplitudes are carried out in the paper on the basis of dynamic triaxial test data of 81 samples at 8 sites in South China. The test data have been also compared with those in situ teses. A generalized hyperbola model discribing more satisfactorily the relationship between stress and strain of all various soils is proposed according to the analysis results. The model retains the following advantages; simple in form and clear physical concept in parameters. statistic expressions of the parameters in model are given for sand and clay respectively. These expressions obviously reflects the characteris- tics of cohesive soil and non-cohesive soil and their difference.