Civil Insight: A Technical Magazine Volume 3 | Page 47

Karki G. and Bhatt M.R.
Civil Insight (2019) 45-50
2.1) Pushover Analysis
The Static method for non-linear analysis is also called pushover analysis in which buildings are subjected
to a monotonically increasing load, meaning buildings are displaced monotonically until the target
displacement is reached. The current pushover analysis is based on an assumption that response of a single
building is equivalent to the response of a single degree of freedom system.
Krawinkler and Seneviratna (1998) presented the basic concepts of pushover analysis and accuracy of
current pushover analysis. The authors also discussed about the conditions when the pushover analysis
gives both good and misleading results.
(a) 3-Story building
(b) 9-Story building
Fig. 2. 3D finite element models using SAP2000 (SAP2000, 2018)
In pushover analysis, FEMA-356 (2000) gives the plastic hinge acceptance criteria, as shown in Fig. 3,
where A = unloaded state, B = elastic limit, IQ = immediate occupancy, LS = limit state, CP = collapse
prevention, D = damage state, E = collapse level.
Fig. 3. Base shear vs Displacement
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