Aftershock seismic assessment taking into account postmainshock residual drifts

摘要: Summary This paper introduces and evaluates a methodology for the aftershock seismic assessment of buildings taking explicitly into account residual drift demands after mainshock (i.e., postmainshock interstory drifts, RIDRo). The is applied to testbed four-story steel moment-resisting building designed with modern design provisions when subjected set near-fault mainshock–aftershock sequences that induce five levels RIDRo. Once induced model, incremental dynamic analysis performed under each obtain its collapse capacity associated demolition reach or exceed 2% drift). effect additional sources stiffness strength interior gravity frames slab contribution) polarity aftershocks are examined in this study. Results investigation show potential strongly depends on modeling approach modified lateral included analytical model). Furthermore, it demonstrated leads an imminent demolition) lower than capacity, which mean parameter should be better measure against aftershocks. Copyright © 2014 John Wiley & Sons, Ltd.