of;
Civil;
Engineering,;
Beijing;
Jiaotong;
University,;
Beijing;
100044,;
China;
of;
Civil;
Engineering;
and;
Architecture,;
Southwest;
Petroleum;
University,;
Chengdu;
610500,;
China;
气体压力; 本构模型; 非饱和土; 硬化效应; 应力状态变量; 变形机制; 模型预测; 弹塑性模型;