Micro-macroscopic statistical description on damage evolution of concrete
Ping Li1, Yongchi Li1, Shiwei Duan2, Mingtao Liu1, Ruiyuan Huang1
1Department of Modern Mechanics, University of Science and Technology of China, Hefei 230027, China
2School of Mechanical Engineering, Anhui University of Technology, Maanshan, 243000, China
In this paper, we present two types of damage model, coupled pressure-shear damage model and tensile damage model, according to the different stress state and different damage mechanism in concrete. Combining microscopic and macroscopic mechanics, we derive the damage evolution equation and obtain relevant material parameters by fitting the test data of one-dimensional compression and tension test. In order to verify the proposed damage model, we carry out numerical simulation on wave propagation problems caused by the explosive charge in concrete columns. The simulation results are consistent with experimental results, which show successfully the evolution of damage in explosion process.