A New Seismic Design Method for Steel Structures

  • Theodore L. Karavasilis
  • Nikitas Bazeos
  • Dimitri E. Beskos
Part of the Geotechnical, Geological and Earthquake Engineering book series (GGEE, volume 13)


A seismic design methodology for steel building frames which combines the advantages of the well-known force-based and displacement-based seismic design methods in a hybrid force/displacement design scheme is proposed. The method controls structural performance by first transforming user-specified values of the interstorey drift ratio (non-structural damage) and local ductility (structural damage) to a target roof displacement and then calculating the appropriate strength reduction factor for limiting ductility demands associated with the target roof displacement. The main characteristics of the method are: (1) it treats both drift and ductility demands as input variables; (2) it does not use a substitute single degree of freedom system; (3) it makes use of conventional elastic response spectrum analysis and design; (4) it includes the influence of the number of storeys; (5) it recognizes the influence of the type of the lateral load resisting system (moment resisting frame or concentrically braced frame); (6) it recognizes the influence of geometrical (setbacks) or mass irregularities.


Peak Ground Acceleration Seismic Design Strength Reduction Factor Roof Displacement Moment Resist Frame 
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The first two authors are grateful for the support provided to them through the “K. Karatheodoris” research program of the University of Patras, Greece. All the authors acknowledge helpful discussions with Professors S.A. Anagnostopoulos, M.N. Fardis and N. Makris.


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Copyright information

© Springer Netherlands 2010

Authors and Affiliations

  • Theodore L. Karavasilis
    • 1
  • Nikitas Bazeos
    • 2
  • Dimitri E. Beskos
    • 2
  1. 1.Department of Engineering ScienceUniversity of OxfordOxfordUK
  2. 2.Department of Civil EngineeringUniversity of PatrasPatrasGreece

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