Elasto-Plastic Earthquake Response Analyses of a Reinforced Concrete Space Frame in Consideration of the Dynamic Axial Force

To make clear the interaction among the force components on the lateral section of column members of a structure under strong earthquake excitation, authors analysed a 2-span reinforced concrete space frame by the use of a socalled equivalent force and equivalent deformation method. It is found that when dynamic axial forces are considered. the local response characteristics of column members especially the base part of the corner columns might be quite different from these of the cases when axial forces are neglected. Also, it is found that these influences exist on the story level even if which could not affect the maximum strength and deformation capacity of the whole story very much.