According to impact problems confronted

under the condition of only known initial velocity of impact body

the dynamic response of square RC slabs on a viscoelastic foudation under low velocity impact is investigated in this paper.Slabs under low velocity impact fail because of overall dynamic response

essentially differing from local damage under high velocity impact.In calculating RC slabs subjected to low velocity impact

the effect of local damage will be taken into account when the integral bending deformation is mainly analyzed.In this paper

by establishing the model for relationship between local deformation and integral bending deformation

the formulae for displacement and impact force are deduced

and the influence of viscoelastic foundation on results is also discussed with an example.