Inclusion of P–Δ effect in displacement-based seismic design of steel moment resisting frames
✍ Scribed by Aristidis V. Asimakopoulos; Dimitris L. Karabalis; Dimitri E. Beskos
- Publisher
- John Wiley and Sons
- Year
- 2007
- Tongue
- English
- Weight
- 218 KB
- Volume
- 36
- Category
- Article
- ISSN
- 0098-8847
- DOI
- 10.1002/eqe.723
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
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.