10-31-2009, 10:18 AM
Modal pushover analysis as a tool for evaluation and design of irregular frames
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info:
This paper investigates the application of modal pushover analysis (MPA) as a tool to estimate seismic demands of
structures with irregular mass distribution. A set of 20 ground motions is selected and median peak values of interstory
drift ratios, story shears and overturning moments obtained with MPA are compared with results of nonlinear time
history analysis (NL-THA). It is concluded that modal pushover analysis can be used to estimate seismic demands for
practical applications in evaluation and design of frames with mass irregularity.
Keywords: Modal pushover; Mass irregularity; Pushover analysis; Nonlinear time history analysis; Higher modes;
Incremental dynamic analysis; Seismic response