渗压作用下非贯通节理岩体损伤变量计算方法

李凯; 刘红岩; 何健

渗压作用下非贯通节理岩体损伤变量计算方法

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- 发布日期: 2019-07-19

Calculation Method of Damage Variable for Non-penetrating Joints Under Osmotic Pressure

摘要

摘要: 为了研究渗压环境下节理引起的岩体损伤变量,首先基于损伤力学损伤应变能释放率与断裂力学附加应变能增量相关联的原理,推导了渗压环境下节理岩体损伤变量计算公式;其次,根据断裂力学理论推导了渗压作用下非贯通节理尖端Ⅰ、Ⅱ型应力强度因子计算方法,进而建立了渗压作用下非贯通节理岩体损伤变量的计算方法。最后对该计算公式进行了验证分析,渗压环境下损伤变量随节理半长的增大逐渐增大;随渗透水压的增大,损伤变量逐渐增大;随节理内摩擦角及节理面软化系数的增大,损伤变量逐渐减小。
- 非贯通节理岩体 /
- 单轴压缩 /
- 渗透压 /
- 应力强度因子 /
- 损伤变量
Abstract: To study the rock mass damage variable caused by joints under osmotic environment, the damage variable calculation formula of the rock mass caused by the osmotic environment is firstly deduced based on the connection of the increment of additional strain energy in fracture mechanics and the emission of damaged strain energy in damage mechanics. Secondly, according to the theory of fracture mechanics, the calculation methods of the stress intensity factor Ⅰand Ⅱ under osmotic pressure are obtained for non-penetrating joints. Then, the calculation methods for the damage variables of non-persistent joints under osmotic pressure are established. Finally, the calculation formula is verified and analyzed. Under the condition of osmotic pressure, the damage variable gradually increases with the half-length of joints. With the increase of osmotic pressure, the damage variable of rock mass increases gradually. The damage variable decreases with the increase of internal friction angle and joint surface softening coefficient.
- rock mass with non-penetrating joints /
- uniaxial compression /
- seepage pressure /
- stress intensity factor /
- damage variable

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参考文献(15)

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渗压作用下非贯通节理岩体损伤变量计算方法

计量

出版历程

Calculation Method of Damage Variable for Non-penetrating Joints Under Osmotic Pressure

计量

出版历程

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