分级加载下冻结黏土的动应变幅变化特征

发布时间：2019-06-15 15:01

【摘要】：动应变幅反映土的振动特征和阻尼特性,温度影响土中水的形态,从而影响动应变幅的大小.采用MTS-810型三轴试验机对一系列温度下黏土的动应变幅变化特征进行研究,结果表明:仪器误差、操作误差等可能使试验结果具有变异性,可采用取平均值的方法来减小试验结果的变异性.动应变幅随加载级数的增加逐渐增大.当温度高于土中水的冻结点时,温度变化对动应变幅的影响较小;当温度低于土中水的冻结点时,随温度的降低,动应变幅变化较显著;当温度低于-4℃时,随温度的降低动应变幅几乎不发生改变.动应变幅随动应力幅的增大呈线性增大趋势.
[Abstract]:The dynamic strain amplitude reflects the vibration and damping characteristics of the soil, and the temperature affects the shape of water in the soil, thus affecting the magnitude of the dynamic stress amplitude. The dynamic strain amplitude variation characteristics of a series of clay at temperature are studied by MTS- 810 triaxial testing machine. The results show that the instrument error and operation error may make the test results variability, and the average value method can be used to reduce the variability of the test results. The amplitude of dynamic strain increases with the increase of loading series. When the temperature is higher than the freezing point of soil water, the effect of temperature change on the dynamic stress amplitude is small, when the temperature is lower than the freezing point of soil water, the dynamic strain amplitude changes significantly with the decrease of temperature, and when the temperature is lower than-4 鈩，

本文编号：2500309