Comparison of the Capacity of Three Types of Lateral Resisting Systems in the Design of a 45-Story Steel Building

In this research, the strengths and weaknesses of lateral systems of tall buildings are identified and a suitable system is proposed both technically and economically. In this regard, for a hypothetical 45-storey building, three types of pipe in pipe system with truss belt cap, moment frame system with truss belt cap and central core system with restraint arm and truss belt are compared. Nonlinear analysis of the structure was performed by pushover method. In addition, the relative displacement of the floors was extracted by ETABS software. The results revealed that the central core system with the restraint arm and truss belt in a hypothetical 45-storey building is economically more viable than other systems. Another consequence is that the closer the truss belt is to the ground floors, the better the performance of the structural system. Although this makes the bracing sections heavier, it will not have much effect on the overall weight of the structure.