摘要
破坏准则是把基于指定应力路径或试验条件下得到土的强度特性推广至一般应力条件,其是否具有广泛适用性值得探讨。基于数值分析,探讨了多种屈服准则反映一般情况下土体强度特性的能力,并依据反映中主应力影响的特性对屈服准则进行了分类。分析表明,广义Mises准则、形变能破坏准则和Bishop准则均不能合理地反映中主应力的放大效应和区间效应,而SMP准则和Lade-Duncan单参数破坏准则可有效地反映这种影响,故建议有限元软件中采用后者进行土工数值分析。
Failure criterions are mathematical experiment, but would be used in general stress models got under given stress path or given condition of conditions. So it is worth to discuss the rationality and applicability of failure criterions. Based on numerical analysis, the strength parameter with different intermediate principle stress is comparatively analyzed. It is demonstrated that the generalized Mises criterion, deformation energy criterion and Bishop criterion can not reflect the intermediate principle stress＇s effect effectively, while the SMP criterion and Lade-Duncan criterion can reflect it reasonable. Therefore,it is advised that the latter criterions can be used to analyses geoteehnical problem with FEM software.
出处
《中国矿业》
北大核心
2015年第12期142-146,共5页
China Mining Magazine
基金
甘肃省交通运输厅科技项目资助(编号:甘交科技〔2011〕39号)
