岩体施工过程损伤演化预测的时变力学分析

由建立的岩体损伤本构模型，依据时变力学理论对岩体进行不同施工路径下的分步开挖计算，并对施工过程中各点损伤演化历程进行计算机仿真模拟，以预测后续开挖的损伤状态及寻求较优施工步序。理论及算例分析均表明：存在损伤演化时，不同施工步序下岩体终应力位移和损伤状态均不同，设计与施工应进行损伤演化的时变力学分析，以保证施工安全。

Study of Damage Evolution in Joint Rock Mass Construction Using Time-Variation Mechanics

Based on the established rock damage model and theory of time variation mechanics, the stress and strain calculation is processed according to the different path of excavation in this paper. In order to predict the damage state of later step and find the better path of excavation, computer simulation of damage evolution is given also. Theoretical and numerical analysis show that the last stress strain and damage field are different in different construction path when the damage evolution is considered.