The 'push-over analysis' of RC buildings under earthquake is a:
Choose the correct answer
Linear elastic response spectrum analysis
Non-linear static analysis — incrementally increasing lateral load to generate capacity curve and identify hinge sequence
Time-history dynamic analysis
Limit state design for bending only
Correct Answer
B. Non-linear static analysis — incrementally increasing lateral load to generate capacity curve and identify hinge sequence
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Push-over analysis (IS 1893 Annex A): non-linear static procedure. Monotonically increasing lateral load applied in proportion to mode shape; track: (1) Capacity curve (base shear vs roof displacement); (2) Sequential plastic hinge formation; (3) Capacity spectrum method to find performance point (intersection with demand spectrum). Identifies weak storey, non-linear deformation capacity. Required for irregular buildings in IS 1893.
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