P-delta effects in medium height moment resisting steel frames under seismic loading


  • J. A. Tjondro University of Canterbury, Christchurch, New Zealand
  • P. J. Moss University of Canterbury, Christchurch, New Zealand
  • A. J. Carr University of Canterbury, Christchurch, New Zealand

Abstract

An analytical investigation of the P-delta effects in medium height steel moment resisting frames excited by selected earthquake motions is reported.

The frames with various design drifts and fundamental natural periods of free vibration were designed according to the loadings provisions for New Zealand's highest seismic risk zone (Wellington) of the Draft Code of Practice for General Structural Design and Design Loading for Buildings, DZ4203 [10] as issued as a "Draft for Comment" in May 1986.

The effect of strength degradation was investigated. Dynamic magnification factors for the member forces and displacement were also observed. Limits for the maximum plastic hinge rotation, inelastic drift, displacement magnification and prediction of maximum plastic hinge rotation based on the inter storey drift are suggested.

References

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BUTTERWORTH, J.W., SPRING, K. C. F., “Column Design ", Section D, New Zealand Steel Study Group, Bulletin of The New Zealand National Society for Earthquake Engineering, Vol.18, No.4, December 1985.

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TJONDRO, J. A. , "A nalytical Investigation of P-Delta Effects in Medium Height Moment-Resisting Steel Frames Under Seismic Loading" , M. E. Report, Department of Civil Engineering, University of Canterbury, February 1988. (An edited version of this Report was published as Civil Engineering Research Report 88/13, December 1988 authored by Tjondro, Moss and Carr).

TJONDRO, J. A., MOSS,P.J. and CARR,A.J., "Seismic P-Delta Effects in Medium Height Moment-Resisting Steel Frames", submitted to the Journal of Engineering Structures, 1990. DOI: https://doi.org/10.5459/bnzsee.23.4.305-321

WALPOLE, W. R., BUTCHER,G.W., "Beam Design", Section C, New Zealand steel Study Group, Bulletin of The New Zealand National Society for Earthquake Engineering, Vol.18, No.4, December 1985.

Published
1990-12-31
How to Cite
Tjondro, J. A., Moss, P. J., & Carr, A. J. (1990). P-delta effects in medium height moment resisting steel frames under seismic loading
. Bulletin of the New Zealand Society for Earthquake Engineering, 23(4), 305-321. https://doi.org/10.5459/bnzsee.23.4.305-321
Section
Articles

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