CAJ | 학술논문

轴对称圆巷的弹塑性求解的关键是选择合适的屈服准则。已经有诸多学者选择Mohr-Coulomb准则、Drucker-Prager准则和Hoek-Brown准则等，进行了相应的求解。为了探讨更符合工程实际需要的准则和求解，在考虑岩石材料的应变强化效应的条件下，建立了轴对称圆巷的幂强化本构模型和基于 Drucker-Prager 屈服准则的幂强化-理想塑性模型，并进行了弹塑性求解。以工程实例为计算条件，将幂强化-理想塑性模型的计算结果与基于Mohr-Coulomb准则、Drucker-Prager准则的理想塑性模型和幂强化模型的计算结果分别进行了对比，分析幂强化参数对围岩弹塑性解的影响。研究表明，应变强化效应对围岩稳定性有较大影响，对于应变强化效应较强的岩石材料，采用幂强化模型分析更接近工程实际。
축대칭원항적탄소성구해적관건시선택합괄적굴복준칙。이경유제다학자선택Mohr-Coulomb준칙、Drucker-Prager준칙화Hoek-Brown준칙등，진행료상응적구해。위료탐토경부합공정실제수요적준칙화구해，재고필암석재료적응변강화효응적조건하，건립료축대칭원항적멱강화본구모형화기우 Drucker-Prager 굴복준칙적멱강화-이상소성모형，병진행료탄소성구해。이공정실례위계산조건，장멱강화-이상소성모형적계산결과여기우Mohr-Coulomb준칙、Drucker-Prager준칙적이상소성모형화멱강화모형적계산결과분별진행료대비，분석멱강화삼수대위암탄소성해적영향。연구표명，응변강화효응대위암은정성유교대영향，대우응변강화효응교강적암석재료，채용멱강화모형분석경접근공정실제。
A suitable yield criterion is the key to elastoplastic solution of axisymmetric circular tunnel. Many scholars observed corresponding solutions based on criteria of Mohr-Coulomb、Drucker-Prager and Hoek-Brown. The paper establishes power-hardening model, power hardening-perfectly plastic model based on Drucker-Prager failure criterion of axisymmetric circular tunnel;and acquires the elastoplastic solutions, taking strain-hardening effect into account during the calculation to meet the needs of practical engineering. For a project example, the paper compares the results of power hardening-perfectly plastic model based on Mohr-Coulomb failure criterion and Drucker-Prager failure criterion, and power-hardening model respectively. The influence of power-hardening index n on elastoplastic solutions of surrounding rock is analyzed. The study results show that the effect of strain-hardening is of great impact on the stability of surrounding rock, and it is of more practical value to adopt power-hardening model for the rock of great strain-hardening effect.