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Steel and Composite Structures
  Volume 10, Number 4, August 2010 , pages 331-348

Energy-based damage index for steel structures
E. Bojorquez, A. Reyes-Salazar, A. Teran-Gilmore and S.E. Ruiz

    Ample research effort has been oriented into developing damage indices with the aim of estimating in a reasonable manner the consequences, in terms of structural damage and deterioration, of severe plastic cycling. Although several studies have been devoted to calibrate damage indices for steel and reinforced concrete members; currently, there is a challenge to study and calibrate the use of such indices for the practical evaluation of complex structures. The aim of this paper is to introduce an energy-based damage index for multi-degree-offreedom steel buildings that accounts explicitly for the effects of cumulative plastic deformation demands. The model has been developed by complementing the results obtained from experimental testing of steel members with those derived from analytical studies regarding the distribution of plastic demands on several steel frames designed according to the Mexico City Building Code. It is concluded that the approach discussed herein is a promising tool for practical structural evaluation of framed structures subjected to large energy demands.
Key Words
    energy-based damage index; plastic hysteretic energy; cumulative plastic deformation demands; steel frames.
Fac. de Ing., Universidad Autonoma de Sinaloa, Culiacan, Sinaloa, Mexico
Departamento de Materiales, Universidad Autonoma Metropolitana, Mexico City, Mexico
Instituto de Ingenieria, Universidad Nacional Autonoma de Mexico, Mexico City, Mexico

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