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.