000022020 001__ 22020
000022020 005__ 20170622131318.0
000022020 04107 $$aeng
000022020 046__ $$k2017-06-15
000022020 100__ $$aVamvatsikos, Dimitrios
000022020 24500 $$aA PROPOSAL FOR DEVELOPING RISK-CONSISTENT BEHAVIOR FACTORS FOR CODE-COMPATIBLE SEISMIC DESIGN

000022020 24630 $$n6.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000022020 260__ $$bNational Technical University of Athens, 2017
000022020 506__ $$arestricted
000022020 520__ $$2eng$$aThe application of linear design procedures for seismic loading is based on the approximation of the nonlinear dynamic response of the structure via a linear structural model. To account for the beneficial effects of ductility, which allows trading off damage for lower design forces, EN 1998-1 adopts the behavior factor q to directly reduce (i.e. divide) the elastic design response spectrum. The same factor is also used to scale up the resulting deformations to approximate their actual value due to nonlinearity. Still, EN 1998-1 only provides values of the q-factor for a very limited number of systems without any guidance on quantifying it for others. In order to introduce new and innovative lateral load resisting systems into the code, researchers have at times proposed corresponding q-values, yet without much consensus: Each proposal comes with its own definition of a safety target and seismic performance assessment method, the latter often reflecting the limited resources available to the researchers. Overall, this uneven process lends little confidence to the proposed q-factors, vis-à-vis the target of achieving a uniform risk level across different systems and sites in Europe. Unlike in the US, where the well-received FEMA P-695 standard has settled this debate, Europe has not formulated a standard methodology (barring some recommendations) to define and validate the q-factors. As a direct remedy, a novel procedure is proposed for obtaining consistent values for q based on the definition of a set of structures to represent each class of buildings, the use of nonlinear static and dynamic analysis methods and the incorporation of the effect of aleatory and epistemic uncertainty on the actual systems’ performance to reach a uniform level of safety across the entire building population. The value added goes beyond the current state of art, offering a consistent risk basis for the seismic design of different systems that remain compatible with current uniform hazard design spectra while allowing an extension to future risk-targeted hazard maps.

000022020 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000022020 653__ $$a

000022020 7112_ $$aCOMPDYN 2017 - 6th International Thematic Conference$$cRhodes Island (GR)$$d2017-06-15 / 2017-06-17$$gCOMPDYN2017
000022020 720__ $$aVamvatsikos, Dimitrios$$iBakalis, Konstantinos
000022020 8560_ $$ffischerc@itam.cas.cz
000022020 8564_ $$s117281$$uhttp://invenio.itam.cas.cz/record/22020/files/20156.pdf$$yOriginal version of the author's contribution as presented on CD, section: [MS19] Loss, Risk, Uncertainty and Nonlinear Modeling for Performance-Based Earthquake Engineering
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000022020 962__ $$r21500
000022020 980__ $$aPAPER