000022090 001__ 22090
000022090 005__ 20170622145956.0
000022090 04107 $$aeng
000022090 046__ $$k2015-05-25
000022090 100__ $$aBracchi, Stefano
000022090 24500 $$aDEFINITION OF MECHANICAL PROPERTIES OF EXISTING MASONRY ACCOUNTING FOR EXPERIMENTAL KNOWLEDGE BY BAYESIAN UPDATING

000022090 24630 $$n5.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000022090 260__ $$bNational Technical University of Athens, 2015
000022090 506__ $$arestricted
000022090 520__ $$2eng$$aThe current approach of the Italian and European building codes to account for knowledge-based uncertainties in the seismic assessment of masonry buildings consists in selecting a knowledge level and reducing material strengths by means of the associated value of confidence factor. Previous works showed that, in the case of masonry structures, the codified approach leads in many cases to inconsistent and unrealistic results and does not properly consider the experimental tests performed. This paper proposes a methodology for taking into account the knowledge on material properties acquired by experimental tests, using Bayesian updating techniques. The use of the Bayesian approach allows to update the values of the material properties assumed a priori as knowledge on the building increases, by taking into account all the information (experimental or judgement-based) gained during the assessment process. The material parameters resulting from this method could be used as input in numerical models, with the aim of calibrating confidence factors on material properties. Finally, analytical expressions are provided, which approximate the results obtained by Bayesian updating, allowing the analyst to obtain the values of material properties to be used in the analysis, as a function of the experimental information gained, without the need of performing a case-by-case Bayesian updating.

000022090 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000022090 653__ $$aBayesian updating, masonry buildings, seismic assessment, uncertainty on material properties, pushover analysis.

000022090 7112_ $$aCOMPDYN 2015 - 5th International Thematic Conference$$cCrete (GR)$$d2015-05-25 / 2015-05-27$$gCOMPDYN2015
000022090 720__ $$aBracchi, Stefano$$iMagenes, Guido$$iPenna, Andrea$$iRota, Maria
000022090 8560_ $$ffischerc@itam.cas.cz
000022090 8564_ $$s781106$$uhttps://invenio.itam.cas.cz/record/22090/files/C1172.pdf$$yOriginal version of the author's contribution as presented on CD, section: 
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000022090 962__ $$r22030
000022090 980__ $$aPAPER