Failure simulation of RC structures under highly dynamic conditions using random lattice models

• Dynamic failure of RC structures is simulated by discrete modeling approaches.
• The rate dependency of concrete is represented by the visco-plastic damage model.
• The transition of failure mode is well demonstrated for different loading rates.
• Reinforcing effects on the failure resistance are investigated for high strain rates.

The failure behavior of concrete structures is simulated using a random lattice model, in which the rate dependent features are described by a visco-plastic damage model. Steel reinforcement is explicitly incorporated within the model without introducing additional degrees of freedom to the system. As part of a calibration process, direct tensile tests are simulated at various strain rates. Validation efforts are made through simulations of four-point bending tests of RC beams under different loading rates. Finally, the enhancement of dynamic failure resistance by various reinforcement conditions is investigated through the simulations of four-point bending tests under a higher loading rate.