suggest a new analytical type of panel zone in seismic calculations of steel frames

The moment resisting frame system is used in most steel structures based on its behavior against the lateral loads. the most important property of this system is the way its members are connected, which effectively contributes to the seismic structural behavior, ductility, stability and architectural interests. generally, in structural engineering analysis, connections are modeled as rigid nodes. in this model, there is an error that this region imposes more displacement on thesystem in non-elastic deformation.