土的动力本构关系的新探讨

Experimental investigation of dynamic constitutive relation of soil

饱和砂土在动力作用下，其主应力轴的旋转、剪切胀缩性及不排水条件下的土性弱化等特性对其动变形的发展具有重大影响。本文建立了考虑上述诸因素的土的二维动力本构新模型。用本模型进行实算并与试验结果相比较符合良好。

The rotation of principal stress axes, diatancy, and softening under the undrained condition have very important effect on dynamic deformation magnitude of soil under the cyclic loading. A new dynamic constitutive relation of soil is built up to consider these factors of influence. There is good agreement between the tested results and the results calculated by the dynamic constitutive mode.