Estimation of seismic inelastic deformation demands in plane steel MRF with vertical mass irregularities.
Estimation of seismic inelastic deformation demands in plane steel MRF with vertical mass irregularities.
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.
3265-3275
Karavasilis, T.L.
15850eb0-6af4-4b6e-bab4-d5bde281b769
Bazeos, N.
a7030733-6d22-4723-860c-71f0e0d4a53c
Beskos, D.E.
9fa0ddd7-599f-46b3-953b-0b1950992c87
November 2008
Karavasilis, T.L.
15850eb0-6af4-4b6e-bab4-d5bde281b769
Bazeos, N.
a7030733-6d22-4723-860c-71f0e0d4a53c
Beskos, D.E.
9fa0ddd7-599f-46b3-953b-0b1950992c87
Karavasilis, T.L., Bazeos, N. and Beskos, D.E.
(2008)
Estimation of seismic inelastic deformation demands in plane steel MRF with vertical mass irregularities.
Engineering Structures, 30 (11), .
(doi:10.1016/j.engstruct.2008.05.005).
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.
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Accepted/In Press date: 7 May 2008
e-pub ahead of print date: 13 June 2008
Published date: November 2008
Organisations:
Infrastructure Group
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Local EPrints ID: 401708
URI: http://eprints.soton.ac.uk/id/eprint/401708
ISSN: 0141-0296
PURE UUID: dbfdf1af-c9a4-49d1-b384-de885baa66d5
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Date deposited: 21 Oct 2016 15:44
Last modified: 15 Mar 2024 02:53
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Author:
T.L. Karavasilis
Author:
N. Bazeos
Author:
D.E. Beskos
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