Local versus global ductility demands in simple bridges

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DOIResolve DOI: http://doi.org/10.1061/(ASCE)0733-9445(2001)127:5(554)
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Journal titleJournal of Structural Engineering
IssueMay 5
Pages554560; # of pages: 7
Subjectbridge, ductility, seismic analysis; Bridges
AbstractThis paper addresses the inelastic dynamic response of simply supported bridges to ground motion intheir transverse direction. The effect of the relative substructure-superstructure flexibility on the inelastic response of bridges is studied for symmetric spans. The bridges are modeled as beams with distributed mass and elasticity, simply supported at the ends by elasto-plastic springs. An analytical extension of the common generalized single degree of freedom model into the inelastic range is presented. Flexibility of the capacity-protected structural elements is shown to add significantly to the ductility demand of the energy dissipating components of bridge systems. A simple method is developed to account for these flexibilities when assessing bridge response beyond its elastic range. Numerical case studies are presented to illustrate the new analytical tool.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number44768
NPARC number20378962
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Record identifier4c5299d6-ea43-4f05-9034-2ad4e24d212c
Record created2012-07-24
Record modified2016-05-09
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