饱和砂土在往复荷载作用下有侧限的本构关系实验研究

为了得到往复荷载作用下有测限的饱和砂土的本构关系，反映非线性和滞回特性并能方便地应用于发生液化的情况，进行了系列实验。实验材料包括4种不同松密程度的细砂，加、卸载路径包括等幅的及不等幅的情况。根据实验数据，得到了以双曲线形式表达的砂土应力-应变关系，包括加载曲线和卸载曲线。

EXPERIMENTAL STUDY ON CONSTITUTIVE RELATION OF LATERALLY CONSTRAINED SATURATED SAND UNDER CYCLIC COMPRESSIVE LOADING

In order to obtain a constitutive relation of saturated soil with laterally constrained compression under cyclic loading, a series of experiments have been carried out so as to describe the nonlinear and hysteresis characteristics property. The specimens are made from loose sand soil, dense sand soil, coarse sand soil and fine sand soil. The specimens are acted with cyclic loadings of equal or unequal amplitude. Based on the experimental data, the constitutive relation expressed by a set of hyperbolas is obtained to include all the loading and unloading parts. The parameters in the relation are also given.