考虑温度和损伤的圆形巷道围岩弹塑性分析  

An Elasto-Plastic Analysis of Surrounding Rocks of Circular Roadway Considering Temperature and Damage

作　　者：贺杨 杨自友 高鹏 尚阳光 张煜 刘俊杰 HE Yang;YANG Ziyou;GAO Peng;SHANG Yangguang;ZHANG Yu;LIU Junjie(School of Civil Engineering,Anhui Jianzhu University,Hefei 230601,China)

机构地区：[1]安徽建筑大学土木工程学院,安徽合肥230601

出　　处：《湖南工业大学学报》2024年第6期1-8,28,共9页Journal of Hunan University of Technology

基　　金：安徽省高校自然科学研究基金资助重点项目(KJ2021A0610)。

摘　　要：为研究圆形巷道围岩在温度应力和损伤作用的下塑性区半径及应力分布规律,基于统一强度理论,推导了围岩在温度应力和损伤耦合作用下的应力场、位移场和塑性区范围的计算公式。结合具体算例,分析了损伤、温度应力等因素对巷道围岩应力和塑性区范围的影响,计算结果表明:损伤和温度应力等因素均对巷道围岩应力和塑性区半径产生较大影响,其中损伤-温度应力共同作用时所造成的塑性区半径最大,相较于仅有围岩应力作用时的塑性区范围增加了8.1%。因此探究巷道在温度应力和损伤作用下围岩塑性区半径及应力分布规律是必要的,可以为巷道工程的优化支护设计和稳定性分析提供理论依据。In view of a study on the plastic zone radius and stress distribution law of circular roadway surrounding rocks under temperature stress and damage effects,based on the unified strength theory,the calculation formulas can be derived for the stress field,displacement field,and plastic zone range of surrounding rocks under the coupling effect of temperature stress and damage.Combined with concrete examples,an analysis is made of the effects of damage,temperature stress and other factors on the stress and plastic zone range of roadway surrounding rocks.The calculation results show that such factors as damage and temperature stress have a significant impact on the stress and plastic zone radius of the roadway surrounding rocks.Among them,the plastic zone radius caused by the combined effect of damage and temperature stress is the largest,which increases by 8.1%compared with the plastic zone range caused by the surrounding rock stress only.Therefore,it is necessary to explore the radius and stress distribution of the plastic zone of surrounding rock in tunnels under the effects of temperature stress and damage,which can provide a theoretical basis for an optimal support design and stability analysis of tunnel engineering.

关 键 词：统一强度理论 温度应力 损伤 圆形巷道 弹塑性解 

分 类 号：TU457[建筑科学—岩土工程]