岩土力学Issue(1)：134-142,9.
基于幂强化本构模型的轴对称圆巷弹塑性解
Elastoplastic solution of axisymmetric circular tunnel based on power-hardening model
摘要
Abstract
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.关键词
岩石力学/弹塑性解/围岩应变强化/幂强化模型Key words
rock mechanics/elastoplastic solution/strain-hardening of surrounding rock/power-hardening model分类
建筑与水利引用本文复制引用
侯公羽,李晶晶,杨悦,王亚潇,梁永辉,李庆伟..基于幂强化本构模型的轴对称圆巷弹塑性解[J].岩土力学,2014,(1):134-142,9.基金项目
国家自然科学基金委员会与神华集团有限责任公司联合资助重点项目(No. U1261212，No. U1361210)。 （No. U1261212，No. U1361210）
