Inclusion of  P –Δ effect in displacement‐based seismic design of steel moment resisting frames | Zendy

Asimakopoulos Aristidis V. | Zendy; Karabalis Dimitris L. | Zendy; Beskos Dimitri E. | Zendy

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Inclusion of P –Δ effect in displacement‐based seismic design of steel moment resisting frames

Author(s) -

Asimakopoulos Aristidis V.,

Karabalis Dimitris L.,

Beskos Dimitri E.

Publication year - 2007

Publication title -

earthquake engineering and structural dynamics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.218

H-Index - 127

eISSN - 1096-9845

pISSN - 0098-8847

DOI - 10.1002/eqe.723

Subject(s) - structural engineering , displacement (psychology) , stiffness , moment (physics) , seismic analysis , ductility (earth science) , parametric statistics , stability (learning theory) , yield (engineering) , function (biology) , basis (linear algebra) , engineering , mathematics , materials science , geometry , computer science , physics , classical mechanics , statistics , psychology , creep , machine learning , evolutionary biology , metallurgy , composite material , psychotherapist , biology

A procedure for treating the P –Δ effect in the direct displacement‐based seismic design of regular steel moment resisting frames with ideal elastoplastic material behaviour is proposed. A simple formula for the yield displacement amplification factor as a function of ductility and the stability coefficient is derived on the basis of the seismic response of an inelastic single degree‐of‐freedom system taking into account the P –Δ effect. Extensive parametric seismic inelastic analyses of plane moment resisting steel frames result in a simple formula for the dynamic stability coefficient as a function of the number of stories of a frame and the column to beam stiffness ratio. Thus, the P –Δ effect can be easily taken into account in a direct displacement‐based seismic design through the stability coefficient and the yield displacement amplification factor. A simple design example serves to illustrate the application of the proposed method and demonstrate its merits. Copyright © 2007 John Wiley & Sons, Ltd.

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