000022018 001__ 22018
000022018 005__ 20170622131318.0
000022018 04107 $$aeng
000022018 046__ $$k2017-06-15
000022018 100__ $$aGeorgioudakis, Manolis
000022018 24500 $$aGROUND MOTION SELECTION AS AN OPTIMIZATION PROBLEM

000022018 24630 $$n6.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000022018 260__ $$bNational Technical University of Athens, 2017
000022018 506__ $$arestricted
000022018 520__ $$2eng$$aNonlinear response history analysis (NRHA) is the most realistic seismic performance assessment method. NRHA requires the selection of acceleration time-histories, which appears to be a major issue for the successful application of the method. The acceleration time-histories should be consistent with the seismicity of the building's site and representative of the expected (or the design) earthquake, i.e. representing all possible future events at the site. Typically, the problem of record selection is tackled either through scaling natural (or recorded) ground motion, or generating them artificially. Existing heuristic methods select and/or scale ground motion records so that their mean spectrum is close to a target/design design spectrum. The records obtained following this practice offer good estimates of the mean response but considerably underestimate the inherent response variability and thus provide no insight regarding the dispersion around the mean. We propose a novel and computationally efficient method for selecting and scaling ground motions records aiming to minimize the error between a target spectrum and the average spectrum of a subset of records through an optimization process. The proposed method selects and scales the ground motion records so that their mean spectrum and the (period-depended) dispersion fit best a target spectrum and the associated dispersion. The problem is formulated as a two-criteria optimization problem, where the record selection considers both the mean spectrum and its dispersion at the range of periods of interest. The proposed procedure is efficient, easy to implement and able to quickly search a pool of ground motion records identifying record subsets that provide estimates of the response quantities of interest. With a minimum number of ground motions we are able to ensure sufficient dispersion estimates for the response quantities. A three-storey moment frame building is considered as a benchmark problem in order to demonstrate the efficiency of the proposed scheme.

000022018 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000022018 653__ $$a

000022018 7112_ $$aCOMPDYN 2017 - 6th International Thematic Conference$$cRhodes Island (GR)$$d2017-06-15 / 2017-06-17$$gCOMPDYN2017
000022018 720__ $$aGeorgioudakis, Manolis$$iFragiadakis, Michalis
000022018 8560_ $$ffischerc@itam.cas.cz
000022018 8564_ $$s116961$$uhttps://invenio.itam.cas.cz/record/22018/files/20103.pdf$$yOriginal version of the author's contribution as presented on CD, section: [RS13] Optimum design and control in structural dynamics and earthquake engineering
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000022018 962__ $$r21500
000022018 980__ $$aPAPER