000009809 001__ 9809
000009809 005__ 20141205153156.0
000009809 04107 $$aeng
000009809 046__ $$k2008-10-12
000009809 100__ $$aDall'Asta, Andrea
000009809 24500 $$aInfluence of Abutment Restraints on the Seismic Response of Multi-Span Continuous Bridges

000009809 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000009809 260__ $$b
000009809 506__ $$arestricted
000009809 520__ $$2eng$$aThe performance of multi-span steel-concrete composite bridges in recent seismic events has shown that these structures are very sensitive to earthquake loading. Extensive damage may occur not only in the substructures, which are expected to yield, but also in the components of the superstructure involved in transferring the seismic loads. Current codes allow the design of regular bridges by means of linear analysis based on response spectrum reduced by a reduction factor reflecting their structural ductility capacity. In bridges whose superstructure transverse motion is restrained at the abutments the sequential yielding of the piers may cause a substantial change of the stiffness distribution. As a consequence force distribution and displacement demand may notably differ from the predictions provided by linear analysis. The scope of this paper is to assess the influence of piers-deck stiffness ratio and piers-deck strength ratio in the post elastic seismic behavior of continuous composite bridges. Some results concerning a three span continuous slab on girder bridge are presented. The dependence of the response on these parameters is studied by means of incremental nonlinear dynamic analysis. The results are then compared with those obtained by means of a linear dynamic analysis. Main focus is posed on curvature demand of the piers, bending moments acting on the superstructures and reaction forces in correspondence of the piers and the abutments.

000009809 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000009809 653__ $$aComposite bridges, transverse seismic behavior, reduction factor

000009809 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000009809 720__ $$aDall'Asta, Andrea$$iTubaldi, Enrico$$iRagni, Laura
000009809 8560_ $$ffischerc@itam.cas.cz
000009809 8564_ $$s364645$$uhttps://invenio.itam.cas.cz/record/9809/files/05-02-0138.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 05-02-0138.
000009809 962__ $$r9324
000009809 980__ $$aPAPER