P ERFORMANCE OF PUSHOVER PROCEDURE IN EVALUATING THE SEISMIC ADEQUACY OF REINFORCED C

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P ERFORMANCE OF PUSHOVER PROCEDURE IN EVALUATING THE SEISMIC ADEQUACY OF REINFORCED CONCRETE FRAMES

Author: A. Shuraim , A. Charif | Size: 245 KB | Format: PDF | Quality: Unspecified | pages: 14

The nonlinear static analytical procedure (Pushover) as introduced by ATC-40 was applied for
the evaluation of existing design of a reinforced concrete frame, in order to examine the
applicability of the pushover for evaluating design of new buildings. Potential structural
deficiencies in the frame were assessed by the code seismic-resistant design and pushover
approaches, for the sake of comparison. In the first approach, the potential deficiencies were
determined by redesigning under one selected seismic combination in order to show which
members would require additional reinforcement. In the second approach, a pushover analysis
was conducted to assess the seismic performance of the frame and detect the locations of the
plastic hinges. The paper shows that vulnerability locations revealed from the two procedures
are significantly different, where the latter procedure tends to overestimate column strength,
consequently, concealing earlier detection of column weaknesses. The paper provides rational
explanations for the apparent discrepancy that can be taken into consideration in order to make
pushover methodology applicable when designing or evaluating existing design of new
buildings.

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