000021764 001__ 21764
000021764 005__ 20170622131303.0
000021764 04107 $$aeng
000021764 046__ $$k2017-06-15
000021764 100__ $$aGkatzogias, Konstantinos I.
000021764 24500 $$aPERFORMANCE-BASED DESIGN AND ASSESSMENT OF SEISMICALLY ISOLATED BRIDGES WITH NON-LINEAR VISCOUS DAMPERS

000021764 24630 $$n6.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000021764 260__ $$bNational Technical University of Athens, 2017
000021764 506__ $$arestricted
000021764 520__ $$2eng$$aA performance-based design procedure is presented herein for seismically isolated bridges equipped with nonlinear viscous dampers (VDs). Accounting for multiple performance objectives, the proposed method initially identifies the critical hazard level and ‘near-optimal’ alternatives of the isolation system in terms of both economy and performance, based on the inelastic response of a single-degree-of-freedom system. By incorporating nonlinear response history analysis (NLRHA) of the multi-degree-of-freedom (MDOF) system in a number of successive design steps that correspond to different performance levels (PLs), it subsequently leads (in a non-iterative way) to a refinement of the initial design solution through the control of a broad range of material strains and deformations. The efficiency of the proposed design methodology is demonstrated by applying it to an actual bridge that was previously designed for ductile behaviour. Assessment of the design using NLRHA for spectrum-compatible motions indicates that the introduction of nonlinearity in viscous dampers can effectively reduce their size (i.e. reduced damper force demand) without significantly affecting the overall bridge response. Furthermore, enhanced seismic performance and cost reduction in the substructure design emerge, thus, rendering base-isolation an appealing design alternative.

000021764 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000021764 653__ $$aBridges, Performance-Based Design & Assessment, Seismic Isolation, Non-linear Viscous Dampers, Non-linear Dynamic Analysis.

000021764 7112_ $$aCOMPDYN 2017 - 6th International Thematic Conference$$cRhodes Island (GR)$$d2017-06-15 / 2017-06-17$$gCOMPDYN2017
000021764 720__ $$aGkatzogias, Konstantinos I.$$iKappos, Andreas J.
000021764 8560_ $$ffischerc@itam.cas.cz
000021764 8564_ $$s947145$$uhttps://invenio.itam.cas.cz/record/21764/files/17855.pdf$$yOriginal version of the author's contribution as presented on CD, section: [MS06] Seismic assessment of bridges and resilience of transportation networks
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000021764 962__ $$r21500
000021764 980__ $$aPAPER