According to the dynamic experimental results of RC（reinforced concrete）members

the mechanical properties at different loading rates were studied.Based on experimental results

the tri-linear restoring force model of RC members

which took into account the loading rate effect and stiffness degradation caused by the damage of concrete

was developed.Then the dynamic experiment of RC members was simulated using the finite element analysis software and the results were compared with those obtained in experiments.Results show that the rate-dependent model

taken into account the loading rates effect and stiffness degradation

could preferably reflect the dynamic behaviors of RC members.Finally

aplane frame model was analyzed at different loading rates to study the effect of loading rates on the dynamic response of structures.It was shown that

with the increasing of loading rates

the strength and stiffness of members and the lateral stiffness of the whole structure model increased.As a result

the horizontal and story displacements of the RC model were reduced with the increase of loading rates.