Abstract: Based on a set of data from seismic response test on an R/C frame,a force-based R/C beam fibre model with non-linear material properties and bond-slip effects are presented firstly in this paper,and then the applications to the tested R/C frame are presented to illustrate the model characteristics and to show the accuracy of seismic analysis including consideration of non-linear factors.It can be concluded that the elastic-plastic analysis is a potential step toward the accurate modelling for the dynamic analyses of R/C structures.Especially for the seismic safety re-evaluation of the existing NPPs,the elastic-plastic methodology with consideration of different non-linearities should be involved.