岩土力学2011，Vol.32Issue(11)：3515-3520,6.
基于Zienkiewicz-Pande屈服准则的弹塑性本构模型在FLAC3D中的二次开发及应用
Secondary development and application of an elastoplastic constitutive model based on Zienkiewicz-Pande yield criterion in FLAC3D
摘要
Abstract
An elastoplastic constitutive model based on Zienkiewicz-Pande yield criterion is developed secondarily in FLAC3D and applied to stability analysis of surrounding rock during the process of excavation in a certain underground hydropower station. Zienkiewicz-Pande yield criterion is the one of forms of improved Mohr-Coulomb criterion, which is a smooth curve and has neither the singular vertex in the p-q plane nor the ridge corners in the n-plane. It is easy to handle not only in the numerical iterative calculation process, but also taking into account the relationship between yield curve and the hydrostatic pressure to some extent, as well as the impact role of the intermediate principal stress σ2 on the yield surface. The criterion has been applied to calculation for excavation and supporting in several large-scale underground caverns of hydropower stations, but has not been adopted by any large numerical software. According to elastoplastic mechanics, incremental iterative calculation format of elastoplastic constitutive model on Zienkiewicz-Pande yield criterion is derived in detail. Based on the program interface of secondary development provided by FLAC3D, VC + + programming language is used to realize the calculation process and compile into dynamic-link library files loaded and invoked. In simulating to an ideal circular tunnel, the self-defined model is consistent with Mohr-Coulomb criterion to verify the correctness of the calculation format. Finally, this constitutive model is applied to stability analysis for excavated surrounding rock in large-scale underground caverns; and the distribution rules of calculated plastic zone, displacement field, stress field are accord with Mohr-Coulomb criterion, which validates the applicability and reliability of the model further.关键词
Zienkiewicz-Pande准则/本构模型/FLAC3D/二次开发Key words
Zienkiewicz-Pande yield criterion/constitutive model/FLAC3D/secondary development分类
建筑与水利引用本文复制引用
左双英,肖明,陈俊涛..基于Zienkiewicz-Pande屈服准则的弹塑性本构模型在FLAC3D中的二次开发及应用[J].岩土力学,2011,32(11):3515-3520,6.基金项目
国家自然科学基金重大研究计划(No.90715042) （No.90715042）
国家杰出青年科学基金(No.50725931) （No.50725931）
国家科技支撑计划(No.2008BAB29B01). （No.2008BAB29B01）
