PLASTIC SKELETON SHIFTING CRITERIA FOR ACCEPTANCE EVALUATION OF STEEL MOMENT RESISTING FRAMES

this paper focuses on damage simulation for a simplified acceptance evaluation of multi-degree-of-freedom moment resisting steel frames. A globa] reduced analysis procedure, previously proposecl by the authors, is utilised for seismic demand prediction at local (member) level, which are compared with a detailed member based analysis. A plastic skeleton shift damage model is used to predict member cyclic plastic deformatien capacity, from the monotonic capacity. The shift parameter is calibrated using the past expe[imental results on constant amplitudes cyclic loacling for H-shaped steel sections, For simplicity of acceptance check, the deformation level corresponding to member strength deterioration, below plastic limit, is consiclered as critical, A six-storey two-bay frame is studied for three ground motions and an aoceleration impulse. This study indicates that the proposed simple methods can serve as a good tool fer scismic acceptance evaluation for practical purposes.