饱和砂土循环动应力应变特性的弹塑性模拟研究

本文以各向异性运动硬化模量场理论为基础，针对饱和砂土在周期荷载作用下的主要特性，探讨了描述这些特性的本构模型；用福建砂的振动扭剪试验确定模型参数，并对模型进行了验证。此外，还就基岩在地震作用下实际水平自由场地的动力稳定性进行了计算，结果表明，本文模型可用于实际工程。

Elastoplastic Modelling for Cyclic Stress Strain Behaviour of 1Saturated Sands

Based on the concept of anisotropic kinematic hardening modulus field the prasent paper explores thedynamic elastoplastic stress strain model which daseribes several fundamental propertieS of saturated sands suhbjectedto a cyclic loading,The proposed model is verified with the experimental results of cyclic torsional shear tests forFujian saturated sands,In addition,this paper analysas the dynamic response of a horizontal soil layer subjected toan excitation of base acceleration. Preliminary results show that the dynamic elastoplastic model proposed in this paper is reasonable and feasible,and can be applied in the practical engineering.