000013484 001__ 13484
000013484 005__ 20161114165555.0
000013484 04107 $$aeng
000013484 046__ $$k2011-05-25
000013484 100__ $$aCardone, D.
000013484 24500 $$aDirect Displacement-Based Seismic Assessment of Multi-Span Simply Supported Deck Bridges

000013484 24630 $$n3.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000013484 260__ $$bNational Technical University of Athens, 2011
000013484 506__ $$arestricted
000013484 520__ $$2eng$$aTraditional seismic assessment is based on a simple comparison of estimated base shear capacity and base shear demand specified by a seismic code. The required code base shear is found by reducing the elastic base shear force corresponding to the elastic stiffness of the structure, by a code-specified force-reduction or behaviour factor. The problems with this approach are that no assessment is made of the actual collapse mechanism, inelastic deformed shape and ductility demand of the structure. In recognition of the limitations of forcebased design and assessment methods, several researchers have started proposing displacement-based approaches for earthquake engineering evaluation and design, with the aim of providing improved reliability in the engineering process by more directly relating computed response and expected structural performance. The need for accurate seismic assessment methods is particularly important for bridges, due to the crucial role that some bridges (especially highway bridges) have after an earthquake, for allowing the civil protection interventions and first aid organizations. In Italy, many of these “strategic” bridges have been built without antiseismic criteria and, therefore, they need to be assessed against seismic risk. In this extent, the development of an assessment procedure which gives reliable results and, at the same time, is sufficiently simple to be applied on a large population of bridges in a short time is very useful. In this paper a Direct Displacement-Based Seismic Assessment (DDBA) procedure satisfying the aforesaid requirements is proposed. In the paper, the proposed DDBA procedure is applied to a number of bridge configurations derived from a 4-span reinforced concrete simply-supported deck bridge of the A16 Italian highway. Some analyses are also repeated following the traditional force-based seismic assessment approach. Finally, the predictions of the proposed DDBA procedure are compared to the results of nonlinear time history analyses.

000013484 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013484 653__ $$aSeismic Assessment, Bridges, Damage States, Nonlinear Time History Analysis

000013484 7112_ $$aCOMPDYN 2011 - 3rd International Thematic Conference$$cIsland of Corfu (GR)$$d2011-05-25 / 2011-05-28$$gCOMPDYN2011
000013484 720__ $$aCardone, D.$$iPerrone, G.$$iPetrini, L.
000013484 8560_ $$ffischerc@itam.cas.cz
000013484 8564_ $$s2456292$$uhttps://invenio.itam.cas.cz/record/13484/files/178.pdf$$yOriginal version of the author's contribution as presented on CD, section: MS 05 Analysis Methods for the Seismic Design and Assessment of Bridges.
000013484 962__ $$r13401
000013484 980__ $$aPAPER