Hamidreza Ebrahimi - Graduate Student, Department of Civil Engineering, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan, Iran
Mahmood Hosseini - Associate Professor, Structural Engineering Research Center, International Institute of Earthquake Engineering and Seismology (IIEES), Tehran, Iran

In this study the effect of earthquake excitations with extensive vertical motion on repairable steelbuildings, designed based on the ‘Directed-Damage Design’ (DDD) idea, has been investigated. DDDidea means guiding the damage to some pre-decided parts of the structural system, so that other partsdon’t experience any major plastic deformation. Considered buildings are regular 10-, 15- and 20-storybuildings and have rocking tubular frame structural system with some yielding-plates dampers at baselevel. Results of nonlinear time history analyses of the buildings show that the proposed structuralsystem acts quite satisfactorily even in case of extensive vertical ground excitations.

Tubular frame, Yielding-plates dampers, Nonlinear time history analysis