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Wind and Structures
  Volume 12, Number 5, August 2009 , pages 425-439

On the member reliability of wind force-resisting steel frames designed by EN and ASCE rules of load combinations
Antanas Kudzys and Algirdas Kudzys

    The expediency of revising universal rules for the combination of gravity and lateral actions of wind force-resisting steel structures recommended by the Standards EN 1990 and ASCE/SEI 7-05 is discussed. Extreme wind forces, gravity actions and their combinations for the limit state design of structures are considered. The effect of statistical uncertainties of extreme wind pressure and steel yield strength on the structural safety of beam-column joints of wind force-resisting multistory steel frames designed by the partial factor design (PFD) and the load and resistance factor design (LRFD) methods is demonstrated. The limit state criterion and the performance process of steel frame joints are presented and considered. Their long-term survival probability analysis is based on the unsophisticated method of transformed conditional probabilities. A numerical example illustrates some discrepancies in international design standards and the necessity to revise the rule of universal combinations of loads in wind and structural engineering.
Key Words
    wind engineering; wind-resisting frames; wind forces; combinations of actions; beam-column joints; structural safety.
Antanas Kudzys and Algirdas Kudzys; KTU Institute of Architecture and Construction, Tunelio 60, 44405 Kaunas, Lithuania

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