Analysis of the dynamic response of reinforced concrete slabs under continuous impact
In order to study the dynamic effects of reinforced concrete slabs under continuous increasing impact,the LS-DYNA display dynamics algorithm was used to numerically simulate the slabs under three continuous impact loads,analyze the damage modes of the three impacts,and extract their energy time course curves and impact force time course curves.The results show that under continuous impact loading,the damage area of concrete increases gradually,the width of strip cracks also expands,and the impact response becomes more complicated;with the increase of impact energy input,the concrete slab will no longer be able to complete the energy conversion alone,and the steel reinforcement will play a good role in energy dissipation during the impact pro-cess;the peak of the falling hammer impact force becomes larger with the increase of the height of the falling hammer,and the first wave duration of impact force becomes longer as the degree of damage to the slab deepens.
万方数据
维普
