Karavasilis, Theodore L., Bazeos, Nikitas and Beskos, D. E.. (2008) Estimation of seismic inelastic deformation demands in plane steel MRF with vertical mass irregularities. Engineering Structures, Vol.30 (No.11). pp. 3265-3275. ISSN 0141-0296

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Abstract

An extensive parametric study on the inelastic seismic response of plane steel moment-resisting frames with vertical mass irregularity is presented. A family of 135 such frames, designed according to the European seismic and structural codes, are subjected to an ensemble of 30 ordinarily (i.e., without near-fault effects) earthquake ground motions scaled to different intensities in order to drive the structures to different limit states. The statistical analysis of the created response databank indicates that the number of storeys, beam-to-column strength ratio and the location (top, midheight and bottom) of the heavier mass influence the heightwise distribution and amplitude of inelastic deformation demands, while the response does not seem to be influenced by the mass ratio. Nonlinear regression analysis is employed in order to derive simple formulae which reflect the aforementioned influences and offer, for a given strength reduction (or behavior) factor, three important response quantities, i.e., the maximum roof displacement, the maximum interstorey drift ratio and the maximum rotation ductility along the height of the structure.

Item Type:	Journal Article
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) T Technology > TJ Mechanical engineering and machinery
Divisions:	Faculty of Science > Engineering
Journal or Publication Title:	Engineering Structures
Publisher:	Pergamon
ISSN:	0141-0296
Official Date:	November 2008
Volume:	Vol.30
Number:	No.11
Number of Pages:	11
Page Range:	pp. 3265-3275
Identification Number:	10.1016/j.engstruct.2008.05.005
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Funder:	University of Patras K. Karatheodoris Research Program (Greece)
Version or Related Resource:	This paper was also presented at the 6th International Congress on Computational Mechanics, Thessaloniki, Greece, Jun 19-21, 2009.
URI:	http://wrap.warwick.ac.uk/id/eprint/46400

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