【摘要】：動應(yīng)變幅反映土的振動特征和阻尼特性,溫度影響土中水的形態(tài),從而影響動應(yīng)變幅的大小.采用MTS-810型三軸試驗機對一系列溫度下黏土的動應(yīng)變幅變化特征進(jìn)行研究,結(jié)果表明:儀器誤差、操作誤差等可能使試驗結(jié)果具有變異性,可采用取平均值的方法來減小試驗結(jié)果的變異性.動應(yīng)變幅隨加載級數(shù)的增加逐漸增大.當(dāng)溫度高于土中水的凍結(jié)點時,溫度變化對動應(yīng)變幅的影響較小;當(dāng)溫度低于土中水的凍結(jié)點時,隨溫度的降低,動應(yīng)變幅變化較顯著;當(dāng)溫度低于-4℃時,隨溫度的降低動應(yīng)變幅幾乎不發(fā)生改變.動應(yīng)變幅隨動應(yīng)力幅的增大呈線性增大趨勢.
[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，

本文編號：2500309