A "new" Multimode Load Pattern For Pushover Analysis: The Effect Of
Higher Modes Of Vibration
Author(s)
R. Almeida & R. Carneiro-Barros
Abstract
A "new" multimode load pattern for pushover
analysis: the effect of higher modes of vibration
R. ~lmeida' & R. ~arneiro-~arros~
1 Dept Civil Engng (Applied Mech Div), Instituto Polite'cnico de Braganga
2 ~ e p t Civil Engng (Structural Div), FEUP-University of Porto, Portugal
Abstract
The effect of the higher modes of vibration on the total nonlinear dynamic
response of a structure is a very important and unsolved problem. To simplify
the process the static nonlinear pushover analysis was proposed associated with
the capacity spectrum method, utilizing a load pattern proportional to the shape
of the fundamental mode of vibration of the structure. The results of the
pushover analysis, with this load pattern, are very accurate for structures that
respond primarily in the fundamental mode. However, when the higher modes of
vibration become important for the total response of the structure, this load
pattern loses its accuracy. To minimize this problem a "new" multimode load
pattern is proposed, ba
Keywords
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