Numerical simulation study of RC slabs under continuous impact
The dynamic response of reinforced concrete(RC)slabs under continuous impact loading was investi-gated based on the LS-DYNA explicit dynamics program.First,by comparing the obtained results with the experimen-tal data from previous tests,the feasibility of the established finite element model was confirmed.Then,the continuous impact of drop hammer on RC slabs was realized by using the restart function of the program,and the energy versus time curves and mid-span displacement changes of the slabs under different steel strength levels were studied,as well as the influence of slab thickness on impact response.It was found that increasing the steel reinforcement strength could reduce the mid-span deflection,however,high-strength steel reinforcement(HRB400)did not significantly affect the energy dissipation capacity of the slabs.Increasing slab thickness could significantly increase the peak impact force of RC slabs and improve their impact resistance.
万方数据
维普
