Drucker. Prager criterion and Murrell criterion including medium principal stress are not verified by the results of true triaxial stresses testing thoroughly. DruckerPrager准则和Murrell准则中包含中间主应力,但并没有得到真正三轴试验结果的检验,也难以表示应力状态对岩样强度的影响。
Mohr-Coulomb strength theory and Drucker-Prager yield criterion is always used as soil yield criterion. They have not considered the intermediate stress effect or the distinguishing of tensile and compression meridian, so they can not reflect the soil actual stress state. 且岩土屈服准则以MohrCoulomb和DruckerPrager为常用,这两种屈服准则没有考虑中间主应力的影响或拉压子午线的区别,不能真实反映土体实际的受力状态。
All thirteen excavation stages of a super deep foundation pit braced by rock-socketed diaphragm wall are simulated in this article using Drucker-Prager soil model and contact algorithm based on direct control method. 本文用DruckerPrager模型和基于直接约束的接触算法模拟了超深嵌岩地下连续墙支护深基坑开挖全过程。
An elastic-plastic model based on Drucker & Prager yield criterion are developed for basement. 基于Drucker&Prager屈服准则建立了地基的弹塑性计算模型;
The nonlinear and plastic materials are defined. In the program, the used soil constitutive models include Duncan-Chang constitutive model, K-G model, modified Cambridge model and Drucker & Prager elastoplastic model. 在程序中土体实现了材料的非线性和弹塑性,分析中采用的土的本构模型有非线性的邓肯-张模型、成都科大K-G模型和弹塑性的修正剑桥模型、Drucker-Prager模型。