Amplification factors for inelastic dynamic p–Δ effects in earthquake analysis
Author:
- 1 July 1987
- journal article
- research article
- Published by Wiley in Earthquake Engineering & Structural Dynamics
- Vol. 15 (5) , 635-651
Abstract
In the present study, the question of inelastic p–Δ effects is examined from the perspective of inelastic spectral ordinates. Inelastic acceleration response spectra are generated using a model which includes the effects of gravity; for each spectrum the ductility factor and the gravity load level (characterized by the stability coefficient) are held constant. Amplification spectra are generated by taking the ratio between spectra with and without gravity effects. The results are analysed statistically and a formula for the amplification factor as a function of the relevant parameters is obtained. Special care is taken to present a formulation that is simple and useful in the context of practical earthquake engineering design.Some currently used p–Δ amplification factors are discussed in the light of the results obtained.Keywords
This publication has 7 references indexed in Scilit:
- Collapse of a model for ductile reinforced concrete frames under extreme earthquake motionsEarthquake Engineering & Structural Dynamics, 1980
- Effect of Initial Base Motion on Response SpectraJournal of the Engineering Mechanics Division, 1978
- Non‐linear models for simulating the dynamic damaging process of low‐rise reinforced concrete buildings during severe earthquakesEarthquake Engineering & Structural Dynamics, 1975
- Gravity Effect on Single-Degree Inelastic SystemJournal of the Engineering Mechanics Division, 1973
- P-Δ and Axial Column Deformation in Aseismic FramesJournal of the Structural Division, 1969
- Collapse of Yielding Structures During EarthquakesJournal of the Engineering Mechanics Division, 1968
- Slenderness Effects in BuildingsJournal of the Structural Division, 1965