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Steel and Composite Structures
  Volume 1, Number 3, September 2001 , pages 283-294

Seismic assessment of steel structures through a cumulative damage
R. Perera, S. Gomez and E. Alarcon(Spain)

    In the present work a constitutive model is developed which permits the assessment of the structural performance through a criterion based on cumulative damage. For it, a damage index is defined and is evaluated through the application of the Miner\'s rule in low-cycle fatigue. However, the damage index is not considered as a posteriori variable since is incorporated explicitly as an internal variable in the constitutive equations which produces a direct coupling between the damage and the structural mechanical behaviour allowing the possibility of considering as a whole different coupled phenomena. For the elaboration of this damage model, the concepts of the mechanics of continuum medium are applied on lumped dissipative models in order to obtain a coupled simplified model. As a result an elastoplastic model coupled with damage and fatigue damage is obtained.
Key Words
    continuum damage mechanics; low cycle fatigue; steel structures; seismic design; simplified model
R. Perera, S. Gomez and E. Alarcon, Department of Structural Mechanics, Technical University of Madrid (UPM), Spain

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