巷道软岩蠕变损伤模型

基金项目:

中科院知识创新工程重要方向项目(KZCX2-YW-113)

详细信息

Creep damage model of soft rock roadway

Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China

摘要: 介绍了西原及修正西原模型的蠕变特性、物理机制和优点。根据软岩加速蠕变的力学特性,指出西原模型不能较好的描述蠕变加速阶段,并引入损伤变量,认为蠕变引起的应变是由无损材料及已损材料蠕变应变之和,推导出材料非稳定蠕变阶段的蠕变方程。同时,利用有限元方法,建立了带有损伤变量蠕变单元方程,可以此编制有限元程序,进行蠕变分析。
- 软岩 /
- 蠕变损伤 /
- 西原体 /
- 有限元
Abstract: Creep characteristics,physics mechanics and advantage of Xiyuan model and modified Xiyuan model are described briefly.According to the mechanics characteristic of accelerating creep phase,the Xiyuan model is unreasonable to describe the accelerating phase.With the damage variable,the creep strain of damaged materials and undamaged one consists of total strain;furthermore,creep equation of unstable phase is developed.Creep ele-ment equation is founded by finite element method,and the FE program is compiled to analyze creep.
- soft rock /
- creep damage /
- Xiyuan model /
- finite element