摘要
为保证地下工程的施工和运行安全,研究温度-应力耦合作用下岩石蠕变特性具有十分重要的意义。基于西原模型,通过引入热损伤变量考虑塑性黏滞系数的改变,提出一种新的热力耦合蠕变损伤模型,建立了蠕变本构关系,推导了其一维和三维蠕变方程,根据硬脆性岩石蠕变试验结果,拟合获得蠕变力学参数,对模型的可靠性进行验证。
It is very important to study the creep characteristics of rock under thermo-mechanical coupling effect to ensure the safety of underground engineering construction and operation. A new thermal-mechanical creep damage model was brought forward,which was considered the thermal damage for coefficient of plastic-viscosity by thermal damage variable based on Nishihara model. The creep constitutive relation and creep equation of one-dimensional and three-dimensional were established. The creep mechanical parameters were obtained by fitting the results of hard and brittle rock creep tests,and the reliability of the model was verified.
出处
《工业建筑》
CSCD
北大核心
2017年第6期86-89,共4页
Industrial Construction
关键词
硬脆性岩石
热力耦合作用
蠕变损伤模型
参数拟合
hard brittle rock
thermo-mechanical coupling effect
creep damage model
parameter fitting
