Evaluation of the influence of vertical irregularities on the seismic performance of a nine-storey steel frame

Fragiadakis, M; Vamvatsikos, D; Papadrakakis, M

dc.contributor.author	Fragiadakis, M	en
dc.contributor.author	Vamvatsikos, D	en
dc.contributor.author	Papadrakakis, M	en
dc.date.accessioned	2014-03-01T01:55:24Z
dc.date.available	2014-03-01T01:55:24Z
dc.date.issued	2006	en
dc.identifier.issn	00988847	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/27717
dc.subject	Bootstrap	en
dc.subject	Incremental dynamic analysis	en
dc.subject	Non-linear dynamic analysis	en
dc.subject	Seismic performance evaluation	en
dc.subject	Vertical irregularities	en
dc.subject.other	Bootstrap method	en
dc.subject.other	Incremental dynamic analysis	en
dc.subject.other	Non-linear dynamic analysis	en
dc.subject.other	Seismic performance evaluation	en
dc.subject.other	Vertical irregularities	en
dc.subject.other	Earthquake resistance	en
dc.subject.other	Elasticity	en
dc.subject.other	Interpolation	en
dc.subject.other	Steel structures	en
dc.subject.other	Stiffness	en
dc.subject.other	Strength of materials	en
dc.subject.other	Structural frames	en
dc.subject.other	bootstrapping	en
dc.subject.other	dynamic analysis	en
dc.subject.other	dynamic response	en
dc.subject.other	ground motion	en
dc.subject.other	response analysis	en
dc.subject.other	seismic response	en
dc.subject.other	steel structure	en
dc.subject.other	structural response	en
dc.title	Evaluation of the influence of vertical irregularities on the seismic performance of a nine-storey steel frame	en
heal.type	journalArticle	en
heal.identifier.primary	10.1002/eqe.591	en
heal.identifier.secondary	http://dx.doi.org/10.1002/eqe.591	en
heal.publicationDate	2006	en
heal.abstract	A methodology based on incremental dynamic analysis (IDA) is presented for the evaluation of structures with vertical irregularities. Four types of storey-irregularities are considered: stiffness, strength, combined stiffness and strength, and mass irregularities. Using the well-known nine-storey LA9 steel frame as a base, the objective is to quantify the effect of irregularities, both for individual and for combinations of stories, on its response. In this context a rational methodology for comparing the seismic performance of different structural configurations is proposed by means of IDA. This entails performing non-linear time history analyses for a suite of ground motion records scaled to several intensity levels and suitably interpolating the results to calculate capacities for a number of limit-states, from elasticity to final global instability. By expressing all limit-state capacities with a common intensity measure, the reference and each modified structure can be naturally compared without needing to have the same period or yield base shear. Using the bootstrap method to construct appropriate confidence intervals, it becomes possible to isolate the effect of irregularities from the record-to-record variability. Thus, the proposed methodology enables a full-range performance evaluation using a highly accurate analysis method that pinpoints the effect of any source of irregularity for each limit-state. Copyright © 2006 John Wiley & Sons, Ltd.	en
heal.journalName	Earthquake Engineering and Structural Dynamics	en
dc.identifier.doi	10.1002/eqe.591	en
dc.identifier.volume	35	en
dc.identifier.issue	12	en
dc.identifier.spage	1489	en
dc.identifier.epage	1509	en