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Coupled Systems Mechanics
  Volume 7, Number 2, April 2018 , pages 177-195

Influence of ductility classes on seismic response of reinforced concrete structures
Zeljana Nikolic, Nikolina Zivaljic and Hrvoje Smoljanovic

    Reinforced concrete buildings in a seismically active area can be designed as DCM (medium ductility) or DCH (high ductility) class according to the regulations of Eurocode 8. In this paper, two RC buildings, one with a wall structural system and the other with a frame system, previously designed for DCM and DCH ductility, were analysed by using incremental dynamic analysis in order to study differences in the behaviour of structures between these ductility classes, especially the failure mechanism and ultimate collapse acceleration. Despite the fact that a higher behaviour factor of DCH structures influences lower seismic resistance, in comparison to DCM structures, a strict application of the design and detailing rules of Eurocode 8 in analysed examples caused that the seismic resistance of both frames does not significantly differ. The conclusions were derived for two buildings and do not necessarily apply to other RC structures. Further analysis could make a valuable contribution to the analysis of the behaviour of such buildings and decide between two ductility classes in everyday building design.
Key Words
    ductility classes; Eurocode 8; incremental dynamic analysis; reinforced concrete buildings
Zeljana Nikolic, Nikolina Zivaljic and Hrvoje Smoljanovic: Faculty of Civil Engineering, University of Split, Architecture and Geodesy, Matice hrvatske 15, 21000 Split, Croatia

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